---
OA_place: repository
OA_type: green
_id: '366'
abstract:
- lang: eng
text: Cesium lead halide (CsPbX3, X = Cl, Br, I) nanocrystals (NCs) offer exceptional
optical properties for several potential applications but their implementation
is hindered by a low chemical and structural stability and limited processability.
In the present work, we developed a new method to efficiently coat CsPbX3 NCs,
which resulted in their increased chemical and optical stability as well as processability.
The method is based on the incorporation of poly(maleic anhydride-alt-1-octadecene)
(PMA) into the synthesis of the perovskite NCs. The presence of PMA in the ligand
shell stabilizes the NCs by tightening the ligand binding, limiting in this way
the NC surface interaction with the surrounding media. We further show that these
NCs can be embedded in self-standing silicone/glass plates as down-conversion
filters for the fabrication of monochromatic green and white light emitting diodes
(LEDs) with narrow bandwidths and appealing color characteristics.
acknowledgement: This work was supported by the European Regional Development Funds,
the Framework 7 program under project UNION (FP7-NMP-2012-310250) and HI-LED (FP7-ICT-2013-11-
619912), as well as the Spanish MINECO Projects BOOSTER (ENE2013-46624-C4-3-R) and
AMALIE (TEC2012-38901- C02-01). M.M. thanks the Spanish MINECO for financial support
through the Juan de la Cierva-formacion program. A.G. and J.A. acknowledge funding
from Generalitat de Catalunya 2014 SGR 1638 and the Spanish MINECO MAT2014-51480-
ERC (e-ATOM) and Severo Ochoa Excellence Program. We would like to thank Pablo Guardia
for fruitful discussions.
article_processing_charge: No
article_type: original
author:
- first_name: Michaela
full_name: Meyn, Michaela
last_name: Meyn
- first_name: Mariano
full_name: Perálvarez, Mariano
last_name: Perálvarez
- first_name: Amelie
full_name: Heuer Jungemann, Amelie
last_name: Heuer Jungemann
- first_name: Wim
full_name: Hertog, Wim
last_name: Hertog
- first_name: Maria
full_name: Ibanez Sabate, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibanez Sabate
orcid: 0000-0001-5013-2843
- first_name: Raquel
full_name: Nafria, Raquel
last_name: Nafria
- first_name: Aziz
full_name: Genç, Aziz
last_name: Genç
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
- first_name: Maksym
full_name: Kovalenko, Maksym
last_name: Kovalenko
- first_name: Josep
full_name: Carreras, Josep
last_name: Carreras
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
- first_name: Antonios
full_name: Kanaras, Antonios
last_name: Kanaras
citation:
ama: Meyn M, Perálvarez M, Heuer Jungemann A, et al. Polymer enhanced stability
of inorganic perovskite nanocrystals and their application in color conversion
LEDs. Applied Materials and Interfaces. 2016;8(30):19579-19586. doi:10.1021/acsami.6b02529
apa: Meyn, M., Perálvarez, M., Heuer Jungemann, A., Hertog, W., Ibáñez, M., Nafria,
R., … Kanaras, A. (2016). Polymer enhanced stability of inorganic perovskite nanocrystals
and their application in color conversion LEDs. Applied Materials and Interfaces.
American Chemical Society. https://doi.org/10.1021/acsami.6b02529
chicago: Meyn, Michaela, Mariano Perálvarez, Amelie Heuer Jungemann, Wim Hertog,
Maria Ibáñez, Raquel Nafria, Aziz Genç, et al. “Polymer Enhanced Stability of
Inorganic Perovskite Nanocrystals and Their Application in Color Conversion LEDs.”
Applied Materials and Interfaces. American Chemical Society, 2016. https://doi.org/10.1021/acsami.6b02529.
ieee: M. Meyn et al., “Polymer enhanced stability of inorganic perovskite
nanocrystals and their application in color conversion LEDs,” Applied Materials
and Interfaces, vol. 8, no. 30. American Chemical Society, pp. 19579–19586,
2016.
ista: Meyn M, Perálvarez M, Heuer Jungemann A, Hertog W, Ibáñez M, Nafria R, Genç
A, Arbiol J, Kovalenko M, Carreras J, Cabot A, Kanaras A. 2016. Polymer enhanced
stability of inorganic perovskite nanocrystals and their application in color
conversion LEDs. Applied Materials and Interfaces. 8(30), 19579–19586.
mla: Meyn, Michaela, et al. “Polymer Enhanced Stability of Inorganic Perovskite
Nanocrystals and Their Application in Color Conversion LEDs.” Applied Materials
and Interfaces, vol. 8, no. 30, American Chemical Society, 2016, pp. 19579–86,
doi:10.1021/acsami.6b02529.
short: M. Meyn, M. Perálvarez, A. Heuer Jungemann, W. Hertog, M. Ibáñez, R. Nafria,
A. Genç, J. Arbiol, M. Kovalenko, J. Carreras, A. Cabot, A. Kanaras, Applied Materials
and Interfaces 8 (2016) 19579–19586.
date_created: 2018-12-11T11:46:03Z
date_published: 2016-07-25T00:00:00Z
date_updated: 2026-05-13T13:45:04Z
day: '25'
doi: 10.1021/acsami.6b02529
extern: '1'
external_id:
pmid:
- '27454750'
intvolume: ' 8'
issue: '30'
keyword:
- inorgani
- perovskite nanocrystals
- CsPbBr3
- LED
- color conversion
- poly(maleic anhydride-alt-1-octadecene)
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://eprints.soton.ac.uk/398581/
month: '07'
oa: 1
oa_version: Accepted Version
page: 19579 - 19586
pmid: 1
publication: Applied Materials and Interfaces
publication_identifier:
eissn:
- 1944-8252
issn:
- 1944-8244
publication_status: published
publisher: American Chemical Society
publist_id: '7460'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Polymer enhanced stability of inorganic perovskite nanocrystals and their application
in color conversion LEDs
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 8
year: '2016'
...
---
OA_type: closed access
_id: '367'
abstract:
- lang: eng
text: 'The functional properties of quaternary I2–II–IV–VI4 nanomaterials, with
potential interest in various technological fields, are highly sensitive to compositional
variations, which is a challenging parameter to adjust. Here we demonstrate the
presence of phosphonic acids to aid controlling the reactivity of the II element
monomer to be incorporated in quaternary Cu2ZnSnSe4 nanoparticles and thus to
provide a more reliable way to adjust the final nanoparticle metal ratios. Furthermore,
we demonstrate the composition control in such multivalence nanoparticles to allow
modifying charge carrier concentrations in nanomaterials produced from the assembly
of these building blocks. '
article_number: '226'
article_processing_charge: No
article_type: original
author:
- first_name: Maria
full_name: Ibáñez, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibáñez
orcid: 0000-0001-5013-2843
- first_name: Taisiia
full_name: Berestok, Taisiia
last_name: Berestok
- first_name: Oleksandr
full_name: Dobrozhan, Oleksandr
last_name: Dobrozhan
- first_name: Aaron
full_name: Lalonde, Aaron
last_name: Lalonde
- first_name: Victor
full_name: Izquierdo Roca, Victor
last_name: Izquierdo Roca
- first_name: Alexey
full_name: Shavel, Alexey
last_name: Shavel
- first_name: Alejandro
full_name: Pérez Rodríguez, Alejandro
last_name: Pérez Rodríguez
- first_name: G Jeffrey
full_name: Snyder, G Jeffrey
last_name: Snyder
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: Ibáñez M, Berestok T, Dobrozhan O, et al. Phosphonic acids aid composition
adjustment in the synthesis of Cu2+xZn1−xSnSe4−y nanoparticles. Journal of
Nanoparticle Research. 2016;18. doi:10.1007/s11051-016-3545-4
apa: Ibáñez, M., Berestok, T., Dobrozhan, O., Lalonde, A., Izquierdo Roca, V., Shavel,
A., … Cabot, A. (2016). Phosphonic acids aid composition adjustment in the synthesis
of Cu2+xZn1−xSnSe4−y nanoparticles. Journal of Nanoparticle Research. Springer
Nature. https://doi.org/10.1007/s11051-016-3545-4
chicago: Ibáñez, Maria, Taisiia Berestok, Oleksandr Dobrozhan, Aaron Lalonde, Victor
Izquierdo Roca, Alexey Shavel, Alejandro Pérez Rodríguez, G Jeffrey Snyder, and
Andreu Cabot. “Phosphonic Acids Aid Composition Adjustment in the Synthesis of
Cu2+xZn1−xSnSe4−y Nanoparticles.” Journal of Nanoparticle Research. Springer
Nature, 2016. https://doi.org/10.1007/s11051-016-3545-4.
ieee: M. Ibáñez et al., “Phosphonic acids aid composition adjustment in the
synthesis of Cu2+xZn1−xSnSe4−y nanoparticles,” Journal of Nanoparticle Research,
vol. 18. Springer Nature, 2016.
ista: Ibáñez M, Berestok T, Dobrozhan O, Lalonde A, Izquierdo Roca V, Shavel A,
Pérez Rodríguez A, Snyder GJ, Cabot A. 2016. Phosphonic acids aid composition
adjustment in the synthesis of Cu2+xZn1−xSnSe4−y nanoparticles. Journal of Nanoparticle
Research. 18, 226.
mla: Ibáñez, Maria, et al. “Phosphonic Acids Aid Composition Adjustment in the Synthesis
of Cu2+xZn1−xSnSe4−y Nanoparticles.” Journal of Nanoparticle Research,
vol. 18, 226, Springer Nature, 2016, doi:10.1007/s11051-016-3545-4.
short: M. Ibáñez, T. Berestok, O. Dobrozhan, A. Lalonde, V. Izquierdo Roca, A. Shavel,
A. Pérez Rodríguez, G.J. Snyder, A. Cabot, Journal of Nanoparticle Research 18
(2016).
date_created: 2018-12-11T11:46:04Z
date_published: 2016-08-11T00:00:00Z
date_updated: 2026-05-18T09:21:57Z
day: '11'
doi: 10.1007/s11051-016-3545-4
extern: '1'
intvolume: ' 18'
keyword:
- CZTSe
- Nanostructured materials
- Colloidal synthesis
- Composition control
- 'Electrical transport: Thermoelectric'
language:
- iso: eng
month: '08'
oa_version: None
publication: Journal of Nanoparticle Research
publication_identifier:
eissn:
- 1572-896X
issn:
- 1388-0764
publication_status: published
publisher: Springer Nature
publist_id: '7461'
quality_controlled: '1'
status: public
title: Phosphonic acids aid composition adjustment in the synthesis of Cu2+xZn1−xSnSe4−y
nanoparticles
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 18
year: '2016'
...
---
OA_type: closed access
_id: '368'
abstract:
- lang: eng
text: The control of the phase distribution in multicomponent nanomaterials is critical
to optimize their catalytic performance. In this direction, while impressive advances
have been achieved in the past decade in the synthesis of multicomponent nanoparticles
and nanocomposites, element rearrangement during catalyst activation has been
frequently overseen. Here, we present a facile galvanic replacement-based procedure
to synthesize Co@Cu nanoparticles with narrow size and composition distributions.
We further characterize their phase arrangement before and after catalytic activation.
When oxidized at 350 °C in air to remove organics, Co@Cu core-shell nanostructures
oxidize to polycrystalline CuO-Co3O4 nanoparticles with randomly distributed CuO
and Co3O4 crystallites. During a posterior reduction treatment in H2 atmosphere,
Cu precipitates in a metallic core and Co migrates to the nanoparticle surface
to form Cu@Co core-shell nanostructures. The catalytic behavior of such Cu@Co
nanoparticles supported on mesoporous silica was further analyzed toward CO2 hydrogenation
in real working conditions.
acknowledgement: The research was supported by the European Regional Development Funds
and the Spanish MICINN projects CSD2009-00050, MAT2014-52416-P, and ENE2013-46624-C4-3-R.
M.I. thanks AGAUR for her Beatriu de Pino?s postdoctoral grant 2013 BP-A00344. J.A.
and A.G. acknowledge the funding from the Spanish MINECO Severo Ochoa Excellence
Program and Generalitat de Catalunya 2014SGR1638.
article_processing_charge: No
article_type: original
author:
- first_name: Raquel
full_name: Nafria, Raquel
last_name: Nafria
- first_name: Aziz
full_name: Genç, Aziz
last_name: Genç
- first_name: Maria
full_name: Ibáñez, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibáñez
orcid: 0000-0001-5013-2843
- first_name: Jprdi
full_name: Arbiol, Jprdi
last_name: Arbiol
- first_name: Pilar
full_name: Ramírez De La Piscina, Pilar
last_name: Ramírez De La Piscina
- first_name: Narcís
full_name: Homs, Narcís
last_name: Homs
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: 'Nafria R, Genç A, Ibáñez M, et al. Co-Cu nanoparticles: Synthesis by galvanic
replacement and phase rearrangement during catalytic activation. Langmuir.
2016;32(9):2267-2276. doi:10.1021/acs.langmuir.5b04622'
apa: 'Nafria, R., Genç, A., Ibáñez, M., Arbiol, J., Ramírez De La Piscina, P., Homs,
N., & Cabot, A. (2016). Co-Cu nanoparticles: Synthesis by galvanic replacement
and phase rearrangement during catalytic activation. Langmuir. American
Chemical Society. https://doi.org/10.1021/acs.langmuir.5b04622'
chicago: 'Nafria, Raquel, Aziz Genç, Maria Ibáñez, Jprdi Arbiol, Pilar Ramírez De
La Piscina, Narcís Homs, and Andreu Cabot. “Co-Cu Nanoparticles: Synthesis by
Galvanic Replacement and Phase Rearrangement during Catalytic Activation.” Langmuir.
American Chemical Society, 2016. https://doi.org/10.1021/acs.langmuir.5b04622.'
ieee: 'R. Nafria et al., “Co-Cu nanoparticles: Synthesis by galvanic replacement
and phase rearrangement during catalytic activation,” Langmuir, vol. 32,
no. 9. American Chemical Society, pp. 2267–2276, 2016.'
ista: 'Nafria R, Genç A, Ibáñez M, Arbiol J, Ramírez De La Piscina P, Homs N, Cabot
A. 2016. Co-Cu nanoparticles: Synthesis by galvanic replacement and phase rearrangement
during catalytic activation. Langmuir. 32(9), 2267–2276.'
mla: 'Nafria, Raquel, et al. “Co-Cu Nanoparticles: Synthesis by Galvanic Replacement
and Phase Rearrangement during Catalytic Activation.” Langmuir, vol. 32,
no. 9, American Chemical Society, 2016, pp. 2267–76, doi:10.1021/acs.langmuir.5b04622.'
short: R. Nafria, A. Genç, M. Ibáñez, J. Arbiol, P. Ramírez De La Piscina, N. Homs,
A. Cabot, Langmuir 32 (2016) 2267–2276.
date_created: 2018-12-11T11:46:04Z
date_published: 2016-03-08T00:00:00Z
date_updated: 2026-05-13T13:54:20Z
day: '08'
doi: 10.1021/acs.langmuir.5b04622
extern: '1'
intvolume: ' 32'
issue: '9'
language:
- iso: eng
month: '03'
oa_version: None
page: 2267 - 2276
publication: Langmuir
publication_identifier:
eissn:
- 1520-5827
issn:
- 0743-7463
publication_status: published
publisher: American Chemical Society
publist_id: '7462'
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Co-Cu nanoparticles: Synthesis by galvanic replacement and phase rearrangement
during catalytic activation'
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 32
year: '2016'
...
---
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
_id: '369'
abstract:
- lang: eng
text: The efficient conversion between thermal and electrical energy by means of
durable, silent and scalable solid-state thermoelectric devices has been a long
standing goal. While nanocrystalline materials have already led to substantially
higher thermoelectric efficiencies, further improvements are expected to arise
from precise chemical engineering of nanoscale building blocks and interfaces.
Here we present a simple and versatile bottom-up strategy based on the assembly
of colloidal nanocrystals to produce consolidated yet nanostructured thermoelectric
materials. In the case study on the PbS-Ag system, Ag nanodomains not only contribute
to block phonon propagation, but also provide electrons to the PbS host semiconductor
and reduce the PbS intergrain energy barriers for charge transport. Thus, PbS-Ag
nanocomposites exhibit reduced thermal conductivities and higher charge carrier
concentrations and mobilities than PbS nanomaterial. Such improvements of the
material transport properties provide thermoelectric figures of merit up to 1.7
at 850 K.
article_number: '10766'
article_processing_charge: No
article_type: original
author:
- first_name: Maria
full_name: Ibanez Sabate, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibanez Sabate
orcid: 0000-0001-5013-2843
- first_name: Zhishan
full_name: Luo, Zhishan
last_name: Luo
- first_name: Azoz
full_name: Genç, Azoz
last_name: Genç
- first_name: Laura
full_name: Piveteau, Laura
last_name: Piveteau
- first_name: Silvia
full_name: Ortega, Silvia
last_name: Ortega
- first_name: Doris
full_name: Cadavid, Doris
last_name: Cadavid
- first_name: Oleksandr
full_name: Dobrozhan, Oleksandr
last_name: Dobrozhan
- first_name: Yu
full_name: Liu, Yu
id: 2A70014E-F248-11E8-B48F-1D18A9856A87
last_name: Liu
orcid: 0000-0001-7313-6740
- first_name: Maarten
full_name: Nachtegaal, Maarten
last_name: Nachtegaal
- first_name: Mona
full_name: Zebarjadi, Mona
last_name: Zebarjadi
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
- first_name: Maksym
full_name: Kovalenko, Maksym
last_name: Kovalenko
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: Ibáñez M, Luo Z, Genç A, et al. High performance thermoelectric nanocomposites
from nanocrystal building blocks. Nature Communications. 2016;7. doi:10.1038/ncomms10766
apa: Ibáñez, M., Luo, Z., Genç, A., Piveteau, L., Ortega, S., Cadavid, D., … Cabot,
A. (2016). High performance thermoelectric nanocomposites from nanocrystal building
blocks. Nature Communications. Nature Publishing Group. https://doi.org/10.1038/ncomms10766
chicago: Ibáñez, Maria, Zhishan Luo, Azoz Genç, Laura Piveteau, Silvia Ortega, Doris
Cadavid, Oleksandr Dobrozhan, et al. “High Performance Thermoelectric Nanocomposites
from Nanocrystal Building Blocks.” Nature Communications. Nature Publishing
Group, 2016. https://doi.org/10.1038/ncomms10766.
ieee: M. Ibáñez et al., “High performance thermoelectric nanocomposites from
nanocrystal building blocks,” Nature Communications, vol. 7. Nature Publishing
Group, 2016.
ista: Ibáñez M, Luo Z, Genç A, Piveteau L, Ortega S, Cadavid D, Dobrozhan O, Liu
Y, Nachtegaal M, Zebarjadi M, Arbiol J, Kovalenko M, Cabot A. 2016. High performance
thermoelectric nanocomposites from nanocrystal building blocks. Nature Communications.
7, 10766.
mla: Ibáñez, Maria, et al. “High Performance Thermoelectric Nanocomposites from
Nanocrystal Building Blocks.” Nature Communications, vol. 7, 10766, Nature
Publishing Group, 2016, doi:10.1038/ncomms10766.
short: M. Ibáñez, Z. Luo, A. Genç, L. Piveteau, S. Ortega, D. Cadavid, O. Dobrozhan,
Y. Liu, M. Nachtegaal, M. Zebarjadi, J. Arbiol, M. Kovalenko, A. Cabot, Nature
Communications 7 (2016).
date_created: 2018-12-11T11:46:04Z
date_published: 2016-03-07T00:00:00Z
date_updated: 2026-05-13T13:59:30Z
day: '07'
doi: 10.1038/ncomms10766
extern: '1'
external_id:
pmid:
- ' 26948987'
intvolume: ' 7'
language:
- iso: eng
license: https://creativecommons.org/licenses/by/4.0/
main_file_link:
- open_access: '1'
url: https://doi.org/10.1038/ncomms10766
month: '03'
oa: 1
oa_version: Published Version
pmid: 1
publication: Nature Communications
publication_identifier:
eissn:
- 2041-1723
publication_status: published
publisher: Nature Publishing Group
publist_id: '7463'
quality_controlled: '1'
scopus_import: '1'
status: public
title: High performance thermoelectric nanocomposites from nanocrystal building blocks
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 7
year: '2016'
...
---
OA_type: closed access
_id: '370'
abstract:
- lang: eng
text: Copper-based chalcogenides that comprise abundant, low-cost, and environmental
friendly elements are excellent materials for a number of energy conversion applications,
including photovoltaics, photocatalysis, and thermoelectrics (TE). In such applications,
the use of solution-processed nanocrystals (NCs) to produce thin films or bulk
nanomaterials has associated several potential advantages, such as high material
yield and throughput, and composition control with unmatched spatial resolution
and cost. Here we report on the production of Cu3SbSe4 (CASe) NCs with tuned amounts
of Sn and Bi dopants. After proper ligand removal, as monitored by nuclear magnetic
resonance and infrared spectroscopy, these NCs were used to produce dense CASe
bulk nanomaterials for solid state TE energy conversion. By adjusting the amount
of extrinsic dopants, dimensionless TE figures of merit (ZT) up to 1.26 at 673
K were reached. Such high ZT values are related to an optimized carrier concentration
by Sn doping, a minimized lattice thermal conductivity due to efficient phonon
scattering at point defects and grain boundaries, and to an increase of the Seebeck
coefficient obtained by a modification of the electronic band structure with Bi
doping. Nanomaterials were further employed to fabricate ring-shaped TE generators
to be coupled to hot pipes, which provided 20 mV and 1 mW per TE element when
exposed to a 160 °C temperature gradient. The simple design and good thermal contact
associated with the ring geometry and the potential low cost of the material solution
processing may allow the fabrication of TE generators with short payback times.
article_processing_charge: No
article_type: original
author:
- first_name: Yu
full_name: Liu, Yu
id: 2A70014E-F248-11E8-B48F-1D18A9856A87
last_name: Liu
orcid: 0000-0001-7313-6740
- first_name: Gregorio
full_name: García, Gregorio
last_name: García
- first_name: Silvia
full_name: Ortega, Silvia
last_name: Ortega
- first_name: Doris
full_name: Cadavid, Doris
last_name: Cadavid
- first_name: Pablo
full_name: Palacios, Pablo
last_name: Palacios
- first_name: Jinyu
full_name: Lu, Jinyu
last_name: Lu
- first_name: Maria
full_name: Ibanez, Maria
last_name: Ibanez
- first_name: Lili
full_name: Xi, Lili
last_name: Xi
- first_name: Jonathan
full_name: De Roo, Jonathan
last_name: De Roo
- first_name: Antonio
full_name: López, Antonio
last_name: López
- first_name: Sara
full_name: Márti Sánchez, Sara
last_name: Márti Sánchez
- first_name: Ignasi
full_name: Cabezas, Ignasi
last_name: Cabezas
- first_name: Maria
full_name: De La Mata, Maria
last_name: De La Mata
- first_name: Zhishan
full_name: Luo, Zhishan
last_name: Luo
- first_name: Chaocha
full_name: Dun, Chaocha
last_name: Dun
- first_name: Oleksandr
full_name: Dobrozhan, Oleksandr
last_name: Dobrozhan
- first_name: David
full_name: Carroll, David
last_name: Carroll
- first_name: Wenging
full_name: Zhang, Wenging
last_name: Zhang
- first_name: José
full_name: Martins, José
last_name: Martins
- first_name: Mksym
full_name: Kovalenko, Mksym
last_name: Kovalenko
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
- first_name: German
full_name: Noriega, German
last_name: Noriega
- first_name: Jiming
full_name: Song, Jiming
last_name: Song
- first_name: Perla
full_name: Wahnón, Perla
last_name: Wahnón
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: Liu Y, García G, Ortega S, et al. Solution based synthesis and processing of
Sn and Bi doped Cu inf 3 inf SbSe inf 4 inf nanocrystals nanomaterials and ring
shaped thermoelectric generators. Journal of Materials Chemistry A. 2016;5(6):2592-2602.
doi:10.1039/C6TA08467B
apa: Liu, Y., García, G., Ortega, S., Cadavid, D., Palacios, P., Lu, J., … Cabot,
A. (2016). Solution based synthesis and processing of Sn and Bi doped Cu inf 3
inf SbSe inf 4 inf nanocrystals nanomaterials and ring shaped thermoelectric generators.
Journal of Materials Chemistry A. Royal Society of Chemistry. https://doi.org/10.1039/C6TA08467B
chicago: Liu, Yu, Gregorio García, Silvia Ortega, Doris Cadavid, Pablo Palacios,
Jinyu Lu, Maria Ibanez, et al. “Solution Based Synthesis and Processing of Sn
and Bi Doped Cu Inf 3 Inf SbSe Inf 4 Inf Nanocrystals Nanomaterials and Ring Shaped
Thermoelectric Generators.” Journal of Materials Chemistry A. Royal Society
of Chemistry, 2016. https://doi.org/10.1039/C6TA08467B.
ieee: Y. Liu et al., “Solution based synthesis and processing of Sn and Bi
doped Cu inf 3 inf SbSe inf 4 inf nanocrystals nanomaterials and ring shaped thermoelectric
generators,” Journal of Materials Chemistry A, vol. 5, no. 6. Royal Society
of Chemistry, pp. 2592–2602, 2016.
ista: Liu Y, García G, Ortega S, Cadavid D, Palacios P, Lu J, Ibanez M, Xi L, De
Roo J, López A, Márti Sánchez S, Cabezas I, De La Mata M, Luo Z, Dun C, Dobrozhan
O, Carroll D, Zhang W, Martins J, Kovalenko M, Arbiol J, Noriega G, Song J, Wahnón
P, Cabot A. 2016. Solution based synthesis and processing of Sn and Bi doped Cu
inf 3 inf SbSe inf 4 inf nanocrystals nanomaterials and ring shaped thermoelectric
generators. Journal of Materials Chemistry A. 5(6), 2592–2602.
mla: Liu, Yu, et al. “Solution Based Synthesis and Processing of Sn and Bi Doped
Cu Inf 3 Inf SbSe Inf 4 Inf Nanocrystals Nanomaterials and Ring Shaped Thermoelectric
Generators.” Journal of Materials Chemistry A, vol. 5, no. 6, Royal Society
of Chemistry, 2016, pp. 2592–602, doi:10.1039/C6TA08467B.
short: Y. Liu, G. García, S. Ortega, D. Cadavid, P. Palacios, J. Lu, M. Ibanez,
L. Xi, J. De Roo, A. López, S. Márti Sánchez, I. Cabezas, M. De La Mata, Z. Luo,
C. Dun, O. Dobrozhan, D. Carroll, W. Zhang, J. Martins, M. Kovalenko, J. Arbiol,
G. Noriega, J. Song, P. Wahnón, A. Cabot, Journal of Materials Chemistry A 5 (2016)
2592–2602.
date_created: 2018-12-11T11:46:05Z
date_published: 2016-12-19T00:00:00Z
date_updated: 2026-05-13T13:12:04Z
day: '19'
doi: 10.1039/C6TA08467B
extern: '1'
intvolume: ' 5'
issue: '6'
language:
- iso: eng
month: '12'
oa_version: None
page: 2592 - 2602
publication: Journal of Materials Chemistry A
publication_identifier:
eissn:
- 2050-7496
issn:
- 2050-7488
publication_status: published
publisher: Royal Society of Chemistry
publist_id: '7457'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Solution based synthesis and processing of Sn and Bi doped Cu inf 3 inf SbSe
inf 4 inf nanocrystals nanomaterials and ring shaped thermoelectric generators
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 5
year: '2016'
...
---
OA_type: closed access
_id: '371'
abstract:
- lang: eng
text: The design and engineering of earth-abundant catalysts that are both cost-effective
and highly active for water splitting are crucial challenges in a number of energy
conversion and storage technologies. In this direction, herein we report the synthesis
of Fe3O4@NiFexOy core-shell nanoheterostructures and the characterization of their
electrocatalytic performance toward the oxygen evolution reaction (OER). Such
nanoparticles (NPs) were produced by a two-step synthesis procedure involving
the colloidal synthesis of Fe3O4 nanocubes with a defective shell and the posterior
diffusion of nickel cations within this defective shell. Fe3O4@NiFexOy NPs were
subsequently spin-coated over ITO-covered glass and their electrocatalytic activity
toward water oxidation in carbonate electrolyte was characterized. Fe3O4@NiFexOy
catalysts reached current densities above 1 mA/cm2 with a 410 mV overpotential
and Tafel slopes of 48 mV/dec, which is among the best electrocatalytic performances
reported in carbonate electrolyte.
acknowledgement: "This work was supported by the European Regional Development Funds
and the Spanish MINECO project BOOSTER, TNT-FUELS, e-TNT, Severo Ochoa Program (MINECO,
Grant SEV-2013-0295), and PEC?CO2. Z.L. thanks the China Scholarship Council for
scholarship support. P.G. acknowledges the People Programme (Marie Curie Actions)
of the FP7/2007-2013 European Union Program (TECNIOspring grant agreement no. 600388)
and the Agency for Business Competitiveness of the Government of Catalonia, ACCIO.
M.I. thanks AGAUR for Beatriu de Pinos postdoctoral grant (2013 BP-A00344).\r\n\r\n"
article_processing_charge: No
article_type: original
author:
- first_name: Zhishan
full_name: Luo, Zhishan
last_name: Luo
- first_name: Sara
full_name: Márti Sánchez, Sara
last_name: Márti Sánchez
- first_name: Raquel
full_name: Nafria, Raquel
last_name: Nafria
- first_name: Gihan
full_name: Joshua, Gihan
last_name: Joshua
- first_name: Maria
full_name: De La Mata, Maria
last_name: De La Mata
- first_name: Pablo
full_name: Guardia, Pablo
last_name: Guardia
- first_name: Christina
full_name: Flox, Christina
last_name: Flox
- first_name: Carlos
full_name: Martínez Boubeta, Carlos
last_name: Martínez Boubeta
- first_name: Konstantinos
full_name: Simeonidis, Konstantinos
last_name: Simeonidis
- first_name: Jordi
full_name: Llorca, Jordi
last_name: Llorca
- first_name: Joan
full_name: Morante, Joan
last_name: Morante
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
- first_name: Maria
full_name: Ibanez Sabate, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibanez Sabate
orcid: 0000-0001-5013-2843
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: Luo Z, Márti Sánchez S, Nafria R, et al. Fe3O4@NiFexOy nanoparticles with enhanced
electrocatalytic properties for oxygen evolution in carbonate electrolyte. Applied
Materials and Interfaces. 2016;8(43):29461-29469. doi:10.1021/acsami.6b09888
apa: Luo, Z., Márti Sánchez, S., Nafria, R., Joshua, G., De La Mata, M., Guardia,
P., … Cabot, A. (2016). Fe3O4@NiFexOy nanoparticles with enhanced electrocatalytic
properties for oxygen evolution in carbonate electrolyte. Applied Materials
and Interfaces. American Chemical Society. https://doi.org/10.1021/acsami.6b09888
chicago: Luo, Zhishan, Sara Márti Sánchez, Raquel Nafria, Gihan Joshua, Maria De
La Mata, Pablo Guardia, Christina Flox, et al. “Fe3O4@NiFexOy Nanoparticles with
Enhanced Electrocatalytic Properties for Oxygen Evolution in Carbonate Electrolyte.”
Applied Materials and Interfaces. American Chemical Society, 2016. https://doi.org/10.1021/acsami.6b09888.
ieee: Z. Luo et al., “Fe3O4@NiFexOy nanoparticles with enhanced electrocatalytic
properties for oxygen evolution in carbonate electrolyte,” Applied Materials
and Interfaces, vol. 8, no. 43. American Chemical Society, pp. 29461–29469,
2016.
ista: Luo Z, Márti Sánchez S, Nafria R, Joshua G, De La Mata M, Guardia P, Flox
C, Martínez Boubeta C, Simeonidis K, Llorca J, Morante J, Arbiol J, Ibáñez M,
Cabot A. 2016. Fe3O4@NiFexOy nanoparticles with enhanced electrocatalytic properties
for oxygen evolution in carbonate electrolyte. Applied Materials and Interfaces.
8(43), 29461–29469.
mla: Luo, Zhishan, et al. “Fe3O4@NiFexOy Nanoparticles with Enhanced Electrocatalytic
Properties for Oxygen Evolution in Carbonate Electrolyte.” Applied Materials
and Interfaces, vol. 8, no. 43, American Chemical Society, 2016, pp. 29461–69,
doi:10.1021/acsami.6b09888.
short: Z. Luo, S. Márti Sánchez, R. Nafria, G. Joshua, M. De La Mata, P. Guardia,
C. Flox, C. Martínez Boubeta, K. Simeonidis, J. Llorca, J. Morante, J. Arbiol,
M. Ibáñez, A. Cabot, Applied Materials and Interfaces 8 (2016) 29461–29469.
date_created: 2018-12-11T11:46:05Z
date_published: 2016-11-02T00:00:00Z
date_updated: 2026-05-13T13:32:06Z
day: '02'
doi: 10.1021/acsami.6b09888
extern: '1'
external_id:
pmid:
- '27730808'
intvolume: ' 8'
issue: '43'
keyword:
- nanoparticle
- iron oxide
- magnetite
- core−shell nanostructure
- electrocatalysts
- oxygen evolution reaction
- OER
language:
- iso: eng
month: '11'
oa_version: None
page: 29461 - 29469
pmid: 1
publication: Applied Materials and Interfaces
publication_identifier:
eissn:
- 1944-8252
issn:
- 1944-8244
publication_status: published
publisher: American Chemical Society
publist_id: '7458'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Fe3O4@NiFexOy nanoparticles with enhanced electrocatalytic properties for oxygen
evolution in carbonate electrolyte
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 8
year: '2016'
...
---
OA_type: closed access
_id: '372'
abstract:
- lang: eng
text: 'The optimization of a material functionality requires both the rational design
and precise engineering of its structural and chemical parameters. In this work,
we show how colloidal chemistry is an excellent synthetic choice for the synthesis
of novel ternary nanostructured chalcogenides, containing exclusively noble metals,
with tailored morphology and composition and with potential application in the
energy conversion field. Specifically, the Ag-Au-Se system has been explored from
a synthetic point of view, which leads to a set of Ag2Se-based hybrid and ternary
nanoparticles including the room temperature synthesis of the rare ternary Ag3AuSe2
fischesserite phase. An in-depth structural and chemical characterization of all
nanomaterials has been performed, which proofed especially useful for unravelling
the reaction mechanism behind the formation of the ternary phase in solution.
The work is complemented with the thermal and electric characterization of a ternary
Ag-Au-Se nanocomposite with promising results: we found that the use of the ternary
nanocomposite represents a clear improvement in terms of thermoelectric energy
conversion as compared to a binary Ag-Se nanocomposite analogue. '
acknowledgement: We acknowledge financial support from the Spanish MINECO through
CTQ2012-32247, CTQ2015-68370-P, and ENE2015-63969-R and from the Generalitat de
Catalunya through 2014 SGR 129. A.F. acknowledges the Spanish MINECO for a Ramon
y Cajal Fellowship (RYC-2010-05821). J.L. is a Serra Hunter Fellow and is grateful
to ICREA Academia program. At IREC, work was supported by European Regional Development
Funds and the Framework 7 program under project UNION (FP7-NMP 310250). M.I. thanks
AGAUR for their Beatriu de Pinos postdoctoral grant. M.V.K. acknowledges partial
financial support by the European Union (EU) via FP7 ERC Starting Grant 2012 (Project
NANOSOLID, GA No. 306733). L.P. acknowledges support from the Scholarship Fund of
the Swiss Chemical Industry (SSCI). The Swiss Light Source is thanked for the provision
of beamtime at the SuperXAS beamline.
article_processing_charge: No
article_type: original
author:
- first_name: Mariona
full_name: Dalmases, Mariona
last_name: Dalmases
- first_name: Maria
full_name: Ibanez Sabate, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibanez Sabate
orcid: 0000-0001-5013-2843
- first_name: Paul
full_name: Torruella, Paul
last_name: Torruella
- first_name: Victor
full_name: Fernàndez Altable, Victor
last_name: Fernàndez Altable
- first_name: Luis
full_name: López Conesa, Luis
last_name: López Conesa
- first_name: Doris
full_name: Cadavid, Doris
last_name: Cadavid
- first_name: Laura
full_name: Piveteau, Laura
last_name: Piveteau
- first_name: Maarten
full_name: Nachtegaal, Maarten
last_name: Nachtegaal
- first_name: Jordi
full_name: Llorca, Jordi
last_name: Llorca
- first_name: Maria
full_name: Ruiz González, Maria
last_name: Ruiz González
- first_name: Sònia
full_name: Estradé, Sònia
last_name: Estradé
- first_name: Francesca
full_name: Peiró, Francesca
last_name: Peiró
- first_name: Maksym
full_name: Kovalenko, Maksym
last_name: Kovalenko
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
- first_name: Albert
full_name: Figuerola, Albert
last_name: Figuerola
citation:
ama: Dalmases M, Ibáñez M, Torruella P, et al. Synthesis and thermoelectric properties
of noble metal ternary chalcogenide systems of Ag Au Se in the forms of alloyed
nanoparticles and colloidal nanoheterostructures. Chemistry of Materials.
2016;28(19):7017-7028. doi:10.1021/acs.chemmater.6b02845
apa: Dalmases, M., Ibáñez, M., Torruella, P., Fernàndez Altable, V., López Conesa,
L., Cadavid, D., … Figuerola, A. (2016). Synthesis and thermoelectric properties
of noble metal ternary chalcogenide systems of Ag Au Se in the forms of alloyed
nanoparticles and colloidal nanoheterostructures. Chemistry of Materials.
American Chemical Society. https://doi.org/10.1021/acs.chemmater.6b02845
chicago: Dalmases, Mariona, Maria Ibáñez, Paul Torruella, Victor Fernàndez Altable,
Luis López Conesa, Doris Cadavid, Laura Piveteau, et al. “Synthesis and Thermoelectric
Properties of Noble Metal Ternary Chalcogenide Systems of Ag Au Se in the Forms
of Alloyed Nanoparticles and Colloidal Nanoheterostructures.” Chemistry of
Materials. American Chemical Society, 2016. https://doi.org/10.1021/acs.chemmater.6b02845.
ieee: M. Dalmases et al., “Synthesis and thermoelectric properties of noble
metal ternary chalcogenide systems of Ag Au Se in the forms of alloyed nanoparticles
and colloidal nanoheterostructures,” Chemistry of Materials, vol. 28, no.
19. American Chemical Society, pp. 7017–7028, 2016.
ista: Dalmases M, Ibáñez M, Torruella P, Fernàndez Altable V, López Conesa L, Cadavid
D, Piveteau L, Nachtegaal M, Llorca J, Ruiz González M, Estradé S, Peiró F, Kovalenko
M, Cabot A, Figuerola A. 2016. Synthesis and thermoelectric properties of noble
metal ternary chalcogenide systems of Ag Au Se in the forms of alloyed nanoparticles
and colloidal nanoheterostructures. Chemistry of Materials. 28(19), 7017–7028.
mla: Dalmases, Mariona, et al. “Synthesis and Thermoelectric Properties of Noble
Metal Ternary Chalcogenide Systems of Ag Au Se in the Forms of Alloyed Nanoparticles
and Colloidal Nanoheterostructures.” Chemistry of Materials, vol. 28, no.
19, American Chemical Society, 2016, pp. 7017–28, doi:10.1021/acs.chemmater.6b02845.
short: M. Dalmases, M. Ibáñez, P. Torruella, V. Fernàndez Altable, L. López Conesa,
D. Cadavid, L. Piveteau, M. Nachtegaal, J. Llorca, M. Ruiz González, S. Estradé,
F. Peiró, M. Kovalenko, A. Cabot, A. Figuerola, Chemistry of Materials 28 (2016)
7017–7028.
date_created: 2018-12-11T11:46:06Z
date_published: 2016-10-11T00:00:00Z
date_updated: 2026-05-13T13:37:04Z
day: '11'
doi: 10.1021/acs.chemmater.6b02845
extern: '1'
intvolume: ' 28'
issue: '19'
language:
- iso: eng
month: '10'
oa_version: None
page: 7017 - 7028
publication: Chemistry of Materials
publication_identifier:
eissn:
- 1520-5002
issn:
- 0897-4756
publication_status: published
publisher: American Chemical Society
publist_id: '7459'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Synthesis and thermoelectric properties of noble metal ternary chalcogenide
systems of Ag Au Se in the forms of alloyed nanoparticles and colloidal nanoheterostructures
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 28
year: '2016'
...
---
OA_place: repository
OA_type: green
_id: '379'
abstract:
- lang: eng
text: Monodisperse Cu2ZnSnS4 (CZTS) nanocrystals (NCs), with quasi-spherical shape,
were prepared by a facile, high-yield, scalable, and high-concentration heat-up
procedure. The key parameters to minimize the NC size distribution were efficient
mixing and heat transfer in the reaction mixture through intensive argon bubbling
and improved control of the heating ramp stability. Optimized synthetic conditions
allowed the production of several grams of highly monodisperse CZTS NCs per batch,
with up to 5 wt % concentration in a crude solution and a yield above 90%.
article_processing_charge: No
article_type: original
author:
- first_name: Alexey
full_name: Shavel, Alexey
last_name: Shavel
- first_name: Maria
full_name: Ibáñez, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibáñez
orcid: 0000-0001-5013-2843
- first_name: Zhishan
full_name: Luo, Zhishan
last_name: Luo
- first_name: Jonathan
full_name: De Roo, Jonathan
last_name: De Roo
- first_name: Alex
full_name: Carrete, Alex
last_name: Carrete
- first_name: Mirjana
full_name: Dimitrievska, Mirjana
last_name: Dimitrievska
- first_name: Aziz
full_name: Genç, Aziz
last_name: Genç
- first_name: Michaela
full_name: Meyns, Michaela
last_name: Meyns
- first_name: Alejandro
full_name: Pérez Rodríguez, Alejandro
last_name: Pérez Rodríguez
- first_name: Maksym
full_name: Kovalenko, Maksym
last_name: Kovalenko
- first_name: Jordi
full_name: Arbol, Jordi
last_name: Arbol
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: Shavel A, Ibáñez M, Luo Z, et al. Scalable heating-up synthesis of monodisperse
Cu2ZnSnS4 nanocrystals. Chemistry of Materials. 2016;28(3):720-726. doi:10.1021/acs.chemmater.5b03417
apa: Shavel, A., Ibáñez, M., Luo, Z., De Roo, J., Carrete, A., Dimitrievska, M.,
… Cabot, A. (2016). Scalable heating-up synthesis of monodisperse Cu2ZnSnS4 nanocrystals.
Chemistry of Materials. American Chemical Society. https://doi.org/10.1021/acs.chemmater.5b03417
chicago: Shavel, Alexey, Maria Ibáñez, Zhishan Luo, Jonathan De Roo, Alex Carrete,
Mirjana Dimitrievska, Aziz Genç, et al. “Scalable Heating-up Synthesis of Monodisperse
Cu2ZnSnS4 Nanocrystals.” Chemistry of Materials. American Chemical Society,
2016. https://doi.org/10.1021/acs.chemmater.5b03417.
ieee: A. Shavel et al., “Scalable heating-up synthesis of monodisperse Cu2ZnSnS4
nanocrystals,” Chemistry of Materials, vol. 28, no. 3. American Chemical
Society, pp. 720–726, 2016.
ista: Shavel A, Ibáñez M, Luo Z, De Roo J, Carrete A, Dimitrievska M, Genç A, Meyns
M, Pérez Rodríguez A, Kovalenko M, Arbol J, Cabot A. 2016. Scalable heating-up
synthesis of monodisperse Cu2ZnSnS4 nanocrystals. Chemistry of Materials. 28(3),
720–726.
mla: Shavel, Alexey, et al. “Scalable Heating-up Synthesis of Monodisperse Cu2ZnSnS4
Nanocrystals.” Chemistry of Materials, vol. 28, no. 3, American Chemical
Society, 2016, pp. 720–26, doi:10.1021/acs.chemmater.5b03417.
short: A. Shavel, M. Ibáñez, Z. Luo, J. De Roo, A. Carrete, M. Dimitrievska, A.
Genç, M. Meyns, A. Pérez Rodríguez, M. Kovalenko, J. Arbol, A. Cabot, Chemistry
of Materials 28 (2016) 720–726.
date_created: 2018-12-11T11:46:08Z
date_published: 2016-01-17T00:00:00Z
date_updated: 2026-05-12T13:29:12Z
day: '17'
doi: 10.1021/acs.chemmater.5b03417
extern: '1'
intvolume: ' 28'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://hdl.handle.net/2445/125077
month: '01'
oa: 1
oa_version: Accepted Version
page: 720 - 726
publication: Chemistry of Materials
publication_identifier:
eissn:
- 1520-5002
issn:
- 0897-4756
publication_status: published
publisher: American Chemical Society
publist_id: '7450'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Scalable heating-up synthesis of monodisperse Cu2ZnSnS4 nanocrystals
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 28
year: '2016'
...
---
OA_type: closed access
_id: '380'
abstract:
- lang: eng
text: Size and shape tunability and low-cost solution processability make colloidal
lead chalcogenide quantum dots (QDs) an emerging class of building blocks for
innovative photovoltaic, thermoelectric and optoelectronic devices. Lead chalcogenide
QDs are known to crystallize in the rock-salt structure, although with very different
atomic order and stoichiometry in the core and surface regions; however, there
exists no convincing prior identification of how extreme downsizing and surface-induced
ligand effects influence structural distortion. Using forefront X-ray scattering
techniques and density functional theory calculations, here we have identified
that, at sizes below 8 nm, PbS and PbSe QDs undergo a lattice distortion with
displacement of the Pb sublattice, driven by ligand-induced tensile strain. The
resulting permanent electric dipoles may have implications on the oriented attachment
of these QDs. Evidence is found for a Pb-deficient core and, in the as-synthesized
QDs, for a rhombic dodecahedral shape with nonpolar {110} facets. On varying the
nature of the surface ligands, differences in lattice strains are found.
acknowledgement: F.B. acknowledges University of Insubria for Junior Fellowship Grant
2013, M.V.K. acknowledges the European Union for financial support via FP7 ERC Starting
Grant 2012 (Project NANOSOLID, GA No. 306733), D.N.D. thanks the European Union
for Marie Curie Fellowship (PIIF-GA-2012-330524) and M.I. thanks AGAUR for her Beatriu
i Pinós post-doctoral grant (2013 BP-A 00344). Synchrotron XRPD data were collected
at the X04SA-MS Beamline of the Swiss Light Source. M. Döbeli is gratefully acknowledged
for taking RBS spectra. Electron microscopy was performed at the Scientific Center
for Optical and Electron Microscopy (ScopeM) at ETH Zürich. Computations were performed
using the BlueGene/Q supercomputer at the SciNet HPC Consortium provided through
the Southern Ontario Smart Computing Innovation Platform (SOSCIP). We thank N. Stadie
and J. Mason for reading the manuscript.
article_processing_charge: No
article_type: original
author:
- first_name: Federica
full_name: Bertolotti, Federica
last_name: Bertolotti
- first_name: Dmitry
full_name: Dirin, Dmitry
last_name: Dirin
- first_name: Maria
full_name: Ibanez Sabate, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibanez Sabate
orcid: 0000-0001-5013-2843
- first_name: Frank
full_name: Krumreich, Frank
last_name: Krumreich
- first_name: Antonio
full_name: Cervellino, Antonio
last_name: Cervellino
- first_name: Ruggero
full_name: Frison, Ruggero
last_name: Frison
- first_name: Oleksandr
full_name: Voznyy, Oleksandr
last_name: Voznyy
- first_name: Edward
full_name: Sargent, Edward
last_name: Sargent
- first_name: Maksym
full_name: Kovalenko, Maksym
last_name: Kovalenko
- first_name: Antonietta
full_name: Guagliardi, Antonietta
last_name: Guagliardi
- first_name: Norberto
full_name: Masciocchi, Norberto
last_name: Masciocchi
citation:
ama: Bertolotti F, Dirin D, Ibáñez M, et al. Crystal symmetry breaking and role
of vacancies in colloidal lead chalcogenide quantum dots. Nature Materials.
2016;15:987-994. doi:10.1038/NMAT4661
apa: Bertolotti, F., Dirin, D., Ibáñez, M., Krumreich, F., Cervellino, A., Frison,
R., … Masciocchi, N. (2016). Crystal symmetry breaking and role of vacancies in
colloidal lead chalcogenide quantum dots. Nature Materials. Springer nature.
https://doi.org/10.1038/NMAT4661
chicago: Bertolotti, Federica, Dmitry Dirin, Maria Ibáñez, Frank Krumreich, Antonio
Cervellino, Ruggero Frison, Oleksandr Voznyy, et al. “Crystal Symmetry Breaking
and Role of Vacancies in Colloidal Lead Chalcogenide Quantum Dots.” Nature
Materials. Springer nature, 2016. https://doi.org/10.1038/NMAT4661.
ieee: F. Bertolotti et al., “Crystal symmetry breaking and role of vacancies
in colloidal lead chalcogenide quantum dots,” Nature Materials, vol. 15.
Springer nature, pp. 987–994, 2016.
ista: Bertolotti F, Dirin D, Ibáñez M, Krumreich F, Cervellino A, Frison R, Voznyy
O, Sargent E, Kovalenko M, Guagliardi A, Masciocchi N. 2016. Crystal symmetry
breaking and role of vacancies in colloidal lead chalcogenide quantum dots. Nature
Materials. 15, 987–994.
mla: Bertolotti, Federica, et al. “Crystal Symmetry Breaking and Role of Vacancies
in Colloidal Lead Chalcogenide Quantum Dots.” Nature Materials, vol. 15,
Springer nature, 2016, pp. 987–94, doi:10.1038/NMAT4661.
short: F. Bertolotti, D. Dirin, M. Ibáñez, F. Krumreich, A. Cervellino, R. Frison,
O. Voznyy, E. Sargent, M. Kovalenko, A. Guagliardi, N. Masciocchi, Nature Materials
15 (2016) 987–994.
date_created: 2018-12-11T11:46:08Z
date_published: 2016-06-13T00:00:00Z
date_updated: 2026-05-12T13:24:10Z
day: '13'
doi: 10.1038/NMAT4661
extern: '1'
intvolume: ' 15'
language:
- iso: eng
month: '06'
oa_version: None
page: 987 - 994
publication: Nature Materials
publication_identifier:
eissn:
- 1476-4660
issn:
- ' 1476-1122'
publication_status: published
publisher: Springer nature
publist_id: '7449'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Crystal symmetry breaking and role of vacancies in colloidal lead chalcogenide
quantum dots
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 15
year: '2016'
...
---
OA_place: publisher
OA_type: hybrid
_id: '381'
abstract:
- lang: eng
text: We present a high-yield and scalable colloidal synthesis to produce monodisperse
AgSbSe2 nanocrystals (NCs). Using nuclear magnetic resonance (NMR) spectroscopy,
we characterized the NC surface chemistry and demonstrate the presence of surfactants
in dynamic exchange, which controls the NC growth mechanism. In addition, these
NCs were electronically doped by introducing small amounts of bismuth. To demonstrate
the technological potential of such processed material, after ligand removal by
means of NaNH2, AgSbSe2 NCs were used as building blocks to produce thermoelectric
(TE) nanomaterials. A preliminary optimization of the doping concentration resulted
in a thermoelectric figure of merit (ZT) of 1.1 at 640 K, which is comparable
to the best ZT values obtained with a Pb- and Te-free material in this middle
temperature range, with the additional advantage of the high versatility and low
cost associated with solution processing technologies.
article_processing_charge: No
article_type: original
author:
- first_name: Yu
full_name: Liu, Yu
id: 2A70014E-F248-11E8-B48F-1D18A9856A87
last_name: Liu
orcid: 0000-0001-7313-6740
- first_name: Doris
full_name: Cadavid, Doris
last_name: Cadavid
- first_name: Maria
full_name: Ibanez Sabate, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibanez Sabate
orcid: 0000-0001-5013-2843
- first_name: Jonathan
full_name: De Roo, Jonathan
last_name: De Roo
- first_name: Silvia
full_name: Ortega, Silvia
last_name: Ortega
- first_name: Oleksandr
full_name: Dobrozhan, Oleksandr
last_name: Dobrozhan
- first_name: Maksym
full_name: Kovalenko, Maksym
last_name: Kovalenko
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: 'Liu Y, Cadavid D, Ibáñez M, et al. Colloidal AgSbSe2 nanocrystals: surface
analysis, electronic doping and processing into thermoelectric nanomaterials.
Journal of Materials Chemistry C. 2016;4(21):4756-4762. doi:10.1039/c6tc00893c'
apa: 'Liu, Y., Cadavid, D., Ibáñez, M., De Roo, J., Ortega, S., Dobrozhan, O., …
Cabot, A. (2016). Colloidal AgSbSe2 nanocrystals: surface analysis, electronic
doping and processing into thermoelectric nanomaterials. Journal of Materials
Chemistry C. Royal Society of Chemistry. https://doi.org/10.1039/c6tc00893c'
chicago: 'Liu, Yu, Doris Cadavid, Maria Ibáñez, Jonathan De Roo, Silvia Ortega,
Oleksandr Dobrozhan, Maksym Kovalenko, and Andreu Cabot. “Colloidal AgSbSe2 Nanocrystals:
Surface Analysis, Electronic Doping and Processing into Thermoelectric Nanomaterials.”
Journal of Materials Chemistry C. Royal Society of Chemistry, 2016. https://doi.org/10.1039/c6tc00893c.'
ieee: 'Y. Liu et al., “Colloidal AgSbSe2 nanocrystals: surface analysis,
electronic doping and processing into thermoelectric nanomaterials,” Journal
of Materials Chemistry C, vol. 4, no. 21. Royal Society of Chemistry, pp.
4756–4762, 2016.'
ista: 'Liu Y, Cadavid D, Ibáñez M, De Roo J, Ortega S, Dobrozhan O, Kovalenko M,
Cabot A. 2016. Colloidal AgSbSe2 nanocrystals: surface analysis, electronic doping
and processing into thermoelectric nanomaterials. Journal of Materials Chemistry
C. 4(21), 4756–4762.'
mla: 'Liu, Yu, et al. “Colloidal AgSbSe2 Nanocrystals: Surface Analysis, Electronic
Doping and Processing into Thermoelectric Nanomaterials.” Journal of Materials
Chemistry C, vol. 4, no. 21, Royal Society of Chemistry, 2016, pp. 4756–62,
doi:10.1039/c6tc00893c.'
short: Y. Liu, D. Cadavid, M. Ibáñez, J. De Roo, S. Ortega, O. Dobrozhan, M. Kovalenko,
A. Cabot, Journal of Materials Chemistry C 4 (2016) 4756–4762.
date_created: 2018-12-11T11:46:09Z
date_published: 2016-04-13T00:00:00Z
date_updated: 2026-05-12T13:19:50Z
day: '13'
doi: 10.1039/c6tc00893c
extern: '1'
intvolume: ' 4'
issue: '21'
language:
- iso: eng
license: https://creativecommons.org/licenses/by/3.0/
main_file_link:
- open_access: '1'
url: https://doi.org/10.1039/C6TC00893C
month: '04'
oa: 1
oa_version: Published Version
page: 4756 - 4762
publication: Journal of Materials Chemistry C
publication_identifier:
eissn:
- 2050-7534
issn:
- 2050-7526
publication_status: published
publisher: Royal Society of Chemistry
publist_id: '7448'
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Colloidal AgSbSe2 nanocrystals: surface analysis, electronic doping and processing
into thermoelectric nanomaterials'
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/3.0/legalcode
name: Creative Commons Attribution 3.0 Unported (CC BY 3.0)
short: CC BY (3.0)
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 4
year: '2016'
...
---
OA_place: repository
OA_type: green
_id: '382'
abstract:
- lang: eng
text: Mn3O4@CoMn2O4 nanoparticles (NPs) were produced at low temperature and ambient
atmosphere using a one-pot two-step synthesis protocol involving the cation exchange
of Mn by Co in preformed Mn3O4 NPs. Selecting the proper cobalt precursor, the
nucleation of CoxOy crystallites at the Mn3O4@CoMn2O4 surface could be simultaneously
promoted to form Mn3O4@CoMn2O4–CoxOy NPs. Such heterostructured NPs were investigated
for oxygen reduction and evolution reactions (ORR, OER) in alkaline solution.
Mn3O4@CoMn2O4–CoxOy NPs with [Co]/[Mn] = 1 showed low overpotentials of 0.31 V
at −3 mA·cm–2 and a small Tafel slope of 52 mV·dec–1 for ORR, and overpotentials
of 0.31 V at 10 mA·cm–2 and a Tafel slope of 81 mV·dec–1 for OER, thus outperforming
commercial Pt-, IrO2-based and previously reported transition metal oxides. This
cation-exchange-based synthesis protocol opens up a new approach to design novel
heterostructured NPs as efficient nonprecious metal bifunctional oxygen catalysts.
acknowledgement: his work was supported by the European Regional Development Funds
and the Spanish MINECO projects BOOSTER (ENE2013-46624-C4-3-R), TNT-FUELS (MAT2014-59961),
e-TNT (MAT2014-59961-C2-2-R) and PEC-CO2 (ENE2012- 3651). Z.L. and Y.L. thank the
China Scholarship Council for scholarship support. E.I. thanks AGAUR for his Ph.D.
grant (FI-2013-B-00769). M.I. thanks AGAUR for the Beatriu de Pinos postdoctoral
grant (2013 BP-A00344). S.M. acknowl- ́ edges funding from “Programa Internacional
de Becas ‘la Caixa’-Severo Ochoa”. J.L. is a Serra Hunter Fellow and is ́ grateful
to ICREA Academia program. We also acknowledge the funding from Generalitat de Catalunya
2014 SGR 1638.
article_processing_charge: No
article_type: original
author:
- first_name: Zhishan
full_name: Luo, Zhishan
last_name: Luo
- first_name: Erdem
full_name: Irtem, Erdem
last_name: Irtem
- first_name: Maria
full_name: Ibanez, Maria
last_name: Ibanez
- first_name: Raquel
full_name: Nafria, Raquel
last_name: Nafria
- first_name: Sara
full_name: Márti Sánchez, Sara
last_name: Márti Sánchez
- first_name: Aziz
full_name: Genç, Aziz
last_name: Genç
- first_name: Maria
full_name: De La Mata, Maria
last_name: De La Mata
- first_name: Yu
full_name: Liu, Yu
id: 2A70014E-F248-11E8-B48F-1D18A9856A87
last_name: Liu
orcid: 0000-0001-7313-6740
- first_name: Doris
full_name: Cadavid, Doris
last_name: Cadavid
- first_name: Jordi
full_name: Llorca, Jordi
last_name: Llorca
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
- first_name: Teresa
full_name: Andreu, Teresa
last_name: Andreu
- first_name: Joan
full_name: Morante, Joan
last_name: Morante
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: 'Luo Z, Irtem E, Ibanez M, et al. Mn3O4@CoMn2O4–CoxOy nanoparticles: Partial
cation exchange synthesis and electrocatalytic properties toward the oxygen reduction
and evolution reactions. Applied Materials and Interfaces. 2016;8(27):17435-17444.
doi:10.1021/acsami.6b02786'
apa: 'Luo, Z., Irtem, E., Ibanez, M., Nafria, R., Márti Sánchez, S., Genç, A., …
Cabot, A. (2016). Mn3O4@CoMn2O4–CoxOy nanoparticles: Partial cation exchange synthesis
and electrocatalytic properties toward the oxygen reduction and evolution reactions.
Applied Materials and Interfaces. American Chemical Society. https://doi.org/10.1021/acsami.6b02786'
chicago: 'Luo, Zhishan, Erdem Irtem, Maria Ibanez, Raquel Nafria, Sara Márti Sánchez,
Aziz Genç, Maria De La Mata, et al. “Mn3O4@CoMn2O4–CoxOy Nanoparticles: Partial
Cation Exchange Synthesis and Electrocatalytic Properties toward the Oxygen Reduction
and Evolution Reactions.” Applied Materials and Interfaces. American Chemical
Society, 2016. https://doi.org/10.1021/acsami.6b02786.'
ieee: 'Z. Luo et al., “Mn3O4@CoMn2O4–CoxOy nanoparticles: Partial cation
exchange synthesis and electrocatalytic properties toward the oxygen reduction
and evolution reactions,” Applied Materials and Interfaces, vol. 8, no.
27. American Chemical Society, pp. 17435–17444, 2016.'
ista: 'Luo Z, Irtem E, Ibanez M, Nafria R, Márti Sánchez S, Genç A, De La Mata M,
Liu Y, Cadavid D, Llorca J, Arbiol J, Andreu T, Morante J, Cabot A. 2016. Mn3O4@CoMn2O4–CoxOy
nanoparticles: Partial cation exchange synthesis and electrocatalytic properties
toward the oxygen reduction and evolution reactions. Applied Materials and Interfaces.
8(27), 17435–17444.'
mla: 'Luo, Zhishan, et al. “Mn3O4@CoMn2O4–CoxOy Nanoparticles: Partial Cation Exchange
Synthesis and Electrocatalytic Properties toward the Oxygen Reduction and Evolution
Reactions.” Applied Materials and Interfaces, vol. 8, no. 27, American
Chemical Society, 2016, pp. 17435–44, doi:10.1021/acsami.6b02786.'
short: Z. Luo, E. Irtem, M. Ibanez, R. Nafria, S. Márti Sánchez, A. Genç, M. De
La Mata, Y. Liu, D. Cadavid, J. Llorca, J. Arbiol, T. Andreu, J. Morante, A. Cabot,
Applied Materials and Interfaces 8 (2016) 17435–17444.
date_created: 2018-12-11T11:46:09Z
date_published: 2016-06-20T00:00:00Z
date_updated: 2026-05-12T14:13:53Z
day: '20'
doi: 10.1021/acsami.6b02786
extern: '1'
external_id:
pmid:
- '27323284'
intvolume: ' 8'
issue: '27'
keyword:
- nanoparticle
- ORR
- OER
- manganese oxide
- cobalt oxide
- colloidal
- electrocatalysis
- cation exchange
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://hdl.handle.net/2117/104566
month: '06'
oa: 1
oa_version: Preprint
page: 17435 - 17444
pmid: 1
publication: Applied Materials and Interfaces
publication_identifier:
eissn:
- 1944-8252
issn:
- 1944-8244
publication_status: published
publisher: American Chemical Society
publist_id: '7447'
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Mn3O4@CoMn2O4–CoxOy nanoparticles: Partial cation exchange synthesis and electrocatalytic
properties toward the oxygen reduction and evolution reactions'
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 8
year: '2016'
...
---
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
_id: '383'
abstract:
- lang: eng
text: In the quest for more efficient thermoelectric material able to convert thermal
to electrical energy and vice versa, composites that combine a semiconductor host
having a large Seebeck coefficient with metal nanodomains that provide phonon
scattering and free charge carriers are particularly appealing. Here, we present
our experimental results on the thermal and electrical transport properties of
PbS-metal composites produced by a versatile particle blending procedure, and
where the metal work function allows injecting electrons to the intrinsic PbS
host. We compare the thermoelectric performance of composites with microcrystalline
or nanocrystalline structures. The electrical conductivity of the microcrystalline
host can be increased several orders of magnitude with the metal inclusion, while
relatively high Seebeck coefficient can be simultaneously conserved. On the other
hand, in nanostructured materials, the host crystallites are not able to sustain
a band bending at its interface with the metal, becoming flooded with electrons.
This translates into even higher electrical conductivities than the microcrystalline
material, but at the expense of lower Seebeck coefficient values.
article_processing_charge: No
article_type: original
author:
- first_name: Yu
full_name: Liu, Yu
id: 2A70014E-F248-11E8-B48F-1D18A9856A87
last_name: Liu
orcid: 0000-0001-7313-6740
- first_name: Doris
full_name: Cadavid, Doris
last_name: Cadavid
- first_name: Maria
full_name: Ibanez Sabate, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibanez Sabate
orcid: 0000-0001-5013-2843
- first_name: Silvia
full_name: Ortega, Silvia
last_name: Ortega
- first_name: Sara
full_name: Márti Sánchez, Sara
last_name: Márti Sánchez
- first_name: Oleksander
full_name: Dobrozhan, Oleksander
last_name: Dobrozhan
- first_name: Maksym
full_name: Kovalenko, Maksym
last_name: Kovalenko
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: Liu Y, Cadavid D, Ibáñez M, et al. Thermoelectric properties of semiconductor-metal
composites produced by particle blending. Applied Physics Letters. 2016;4(10).
doi:10.1063/1.4961679
apa: Liu, Y., Cadavid, D., Ibáñez, M., Ortega, S., Márti Sánchez, S., Dobrozhan,
O., … Cabot, A. (2016). Thermoelectric properties of semiconductor-metal composites
produced by particle blending. Applied Physics Letters. American Institute
of Physics. https://doi.org/10.1063/1.4961679
chicago: Liu, Yu, Doris Cadavid, Maria Ibáñez, Silvia Ortega, Sara Márti Sánchez,
Oleksander Dobrozhan, Maksym Kovalenko, Jordi Arbiol, and Andreu Cabot. “Thermoelectric
Properties of Semiconductor-Metal Composites Produced by Particle Blending.” Applied
Physics Letters. American Institute of Physics, 2016. https://doi.org/10.1063/1.4961679.
ieee: Y. Liu et al., “Thermoelectric properties of semiconductor-metal composites
produced by particle blending,” Applied Physics Letters, vol. 4, no. 10.
American Institute of Physics, 2016.
ista: Liu Y, Cadavid D, Ibáñez M, Ortega S, Márti Sánchez S, Dobrozhan O, Kovalenko
M, Arbiol J, Cabot A. 2016. Thermoelectric properties of semiconductor-metal composites
produced by particle blending. Applied Physics Letters. 4(10).
mla: Liu, Yu, et al. “Thermoelectric Properties of Semiconductor-Metal Composites
Produced by Particle Blending.” Applied Physics Letters, vol. 4, no. 10,
American Institute of Physics, 2016, doi:10.1063/1.4961679.
short: Y. Liu, D. Cadavid, M. Ibáñez, S. Ortega, S. Márti Sánchez, O. Dobrozhan,
M. Kovalenko, J. Arbiol, A. Cabot, Applied Physics Letters 4 (2016).
date_created: 2018-12-11T11:46:09Z
date_published: 2016-08-29T00:00:00Z
date_updated: 2026-05-12T13:05:12Z
day: '29'
doi: 10.1063/1.4961679
extern: '1'
intvolume: ' 4'
issue: '10'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1063/1.4961679
month: '08'
oa: 1
oa_version: Published Version
publication: Applied Physics Letters
publication_identifier:
eissn:
- 2166-532X
publication_status: published
publisher: American Institute of Physics
publist_id: '7446'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Thermoelectric properties of semiconductor-metal composites produced by particle
blending
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 4
year: '2016'
...
---
OA_place: repository
OA_type: green
_id: '389'
abstract:
- lang: eng
text: The coherent optical manipulation of solids is emerging as a promising way
to engineer novel quantum states of matter. The strong time-periodic potential
of intense laser light can be used to generate hybrid photon-electron states.
Interaction of light with Bloch states leads to Floquet-Bloch states, which are
essential in realizing new photo-induced quantum phases. Similarly, dressing of
free-electron states near the surface of a solid generates Volkov states, which
are used to study nonlinear optics in atoms and semiconductors. The interaction
of these two dynamic states with each other remains an open experimental problem.
Here we use time- and angle-resolved photoemission spectroscopy (Tr-ARPES) to
selectively study the transition between these two states on the surface of the
topological insulator Bi2Se3. We find that the coupling between the two strongly
depends on the electron momentum, providing a route to enhance or inhibit it.
Moreover, by controlling the light polarization we can negate Volkov states to
generate pure Floquet-Bloch states. This work establishes a systematic path for
the coherent manipulation of solids via light-matter interaction.
acknowledgement: The authors would like to thank C. Lee for useful discussions. This
work is supported by US Department of Energy (DOE), Basic Energy Sciences, Division
of Materials Sciences and Engineering (experimental set-up, data acquisition and
theory), Army Research Office (electron spectrometer) and by the Gordon and Betty
Moore Foundation’s EPiQS Initiative through Grant GBMF4540 (data analysis).
article_processing_charge: No
article_type: letter_note
arxiv: 1
author:
- first_name: Fahad
full_name: Mahmood, Fahad
last_name: Mahmood
- first_name: Ching
full_name: Chan, Ching
last_name: Chan
- first_name: Zhanybek
full_name: Alpichshev, Zhanybek
id: 45E67A2A-F248-11E8-B48F-1D18A9856A87
last_name: Alpichshev
orcid: 0000-0002-7183-5203
- first_name: Dillon
full_name: Gardner, Dillon
last_name: Gardner
- first_name: Young
full_name: Lee, Young
last_name: Lee
- first_name: Patrick
full_name: Lee, Patrick
last_name: Lee
- first_name: Nuh
full_name: Gedik, Nuh
last_name: Gedik
citation:
ama: Mahmood F, Chan C, Alpichshev Z, et al. Selective scattering between Floquet
Bloch and Volkov states in a topological insulator. Nature Physics. 2016;12:306-310.
doi:10.1038/nphys3609
apa: Mahmood, F., Chan, C., Alpichshev, Z., Gardner, D., Lee, Y., Lee, P., &
Gedik, N. (2016). Selective scattering between Floquet Bloch and Volkov states
in a topological insulator. Nature Physics. Springer nature. https://doi.org/10.1038/nphys3609
chicago: Mahmood, Fahad, Ching Chan, Zhanybek Alpichshev, Dillon Gardner, Young
Lee, Patrick Lee, and Nuh Gedik. “Selective Scattering between Floquet Bloch and
Volkov States in a Topological Insulator.” Nature Physics. Springer nature,
2016. https://doi.org/10.1038/nphys3609.
ieee: F. Mahmood et al., “Selective scattering between Floquet Bloch and
Volkov states in a topological insulator,” Nature Physics, vol. 12. Springer
nature, pp. 306–310, 2016.
ista: Mahmood F, Chan C, Alpichshev Z, Gardner D, Lee Y, Lee P, Gedik N. 2016. Selective
scattering between Floquet Bloch and Volkov states in a topological insulator.
Nature Physics. 12, 306–310.
mla: Mahmood, Fahad, et al. “Selective Scattering between Floquet Bloch and Volkov
States in a Topological Insulator.” Nature Physics, vol. 12, Springer nature,
2016, pp. 306–10, doi:10.1038/nphys3609.
short: F. Mahmood, C. Chan, Z. Alpichshev, D. Gardner, Y. Lee, P. Lee, N. Gedik,
Nature Physics 12 (2016) 306–310.
date_created: 2018-12-11T11:46:11Z
date_published: 2016-04-01T00:00:00Z
date_updated: 2026-05-12T12:47:08Z
day: '01'
doi: 10.1038/nphys3609
extern: '1'
external_id:
arxiv:
- '1512.05714'
intvolume: ' 12'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1512.05714
month: '04'
oa: 1
oa_version: Preprint
page: 306 - 310
publication: Nature Physics
publication_identifier:
eissn:
- 1745-2481
issn:
- ' 1745-2473'
publication_status: published
publisher: Springer nature
publist_id: '7440'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Selective scattering between Floquet Bloch and Volkov states in a topological
insulator
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 12
year: '2016'
...
---
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
_id: '390'
abstract:
- lang: eng
text: "In the underdoped copper-oxides, high-temperature superconductivity condenses
from a\r\nnonconventional metallic ”pseudogap” phase that exhibits a variety of
non-Fermi liquid properties.\r\nRecently, it has become clear that a charge density
wave (CDW) phase exists within the pseudogap\r\nregime. This CDW coexists and
competes with superconductivity (SC) below the transition temperature\r\nTc, suggesting
that these two orders are intimately related. Here we show that the condensation
of\r\nthe superfluid from this unconventional precursor is reflected in deviations
from the predictions of\r\nBSC theory regarding the recombination rate of quasiparticles.
We report a detailed investigation of\r\nthe quasiparticle (QP) recombination
lifetime, τqp, as a function of temperature and magnetic field in\r\nunderdoped
HgBa2CuO4+δ (Hg-1201) and YBa2Cu3O6+x (YBCO) single crystals by ultrafast time-resolved\r\nreflectivity.
We find that τqp(T) exhibits a local maximum in a small temperature window near
Tc that is\r\nprominent in underdoped samples with coexisting charge order and
vanishes with application of a small\r\nmagnetic field. We explain this unusual,
non-BCS behavior by positing that Tc marks a transition from\r\nphase-fluctuating
SC/CDW composite order above to a SC/CDW condensate below. Our results suggest\r\nthat
the superfluid in underdoped cuprates is a condensate of coherently-mixed particle-particle
and\r\nparticle-hole pairs."
article_number: '23610'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: James
full_name: Hinton, James
last_name: Hinton
- first_name: E
full_name: Thewalt, E
last_name: Thewalt
- first_name: Zhanybek
full_name: Alpichshev, Zhanybek
id: 45E67A2A-F248-11E8-B48F-1D18A9856A87
last_name: Alpichshev
orcid: 0000-0002-7183-5203
- first_name: Fahad
full_name: Mahmood, Fahad
last_name: Mahmood
- first_name: Jake
full_name: Koralek, Jake
last_name: Koralek
- first_name: Mun
full_name: Chan, Mun
last_name: Chan
- first_name: Michael
full_name: Veit, Michael
last_name: Veit
- first_name: Chelsey
full_name: Dorow, Chelsey
last_name: Dorow
- first_name: Neven
full_name: Barišić, Neven
last_name: Barišić
- first_name: Alexander
full_name: Kemper, Alexander
last_name: Kemper
- first_name: Doug
full_name: Bonn, Doug
last_name: Bonn
- first_name: Walter
full_name: Hardy, Walter
last_name: Hardy
- first_name: Ruixing
full_name: Liang, Ruixing
last_name: Liang
- first_name: Nuh
full_name: Gedik, Nuh
last_name: Gedik
- first_name: Martin
full_name: Greven, Martin
last_name: Greven
- first_name: Alessandra
full_name: Lanzara, Alessandra
last_name: Lanzara
- first_name: Joseph
full_name: Orenstein, Joseph
last_name: Orenstein
citation:
ama: Hinton J, Thewalt E, Alpichshev Z, et al. The rate of quasiparticle recombination
probes the onset of coherence in cuprate superconductors. Scientific Reports.
2016;6. doi:10.1038/srep23610
apa: Hinton, J., Thewalt, E., Alpichshev, Z., Mahmood, F., Koralek, J., Chan, M.,
… Orenstein, J. (2016). The rate of quasiparticle recombination probes the onset
of coherence in cuprate superconductors. Scientific Reports. Nature Publishing
Group. https://doi.org/10.1038/srep23610
chicago: Hinton, James, E Thewalt, Zhanybek Alpichshev, Fahad Mahmood, Jake Koralek,
Mun Chan, Michael Veit, et al. “The Rate of Quasiparticle Recombination Probes
the Onset of Coherence in Cuprate Superconductors.” Scientific Reports.
Nature Publishing Group, 2016. https://doi.org/10.1038/srep23610.
ieee: J. Hinton et al., “The rate of quasiparticle recombination probes the
onset of coherence in cuprate superconductors,” Scientific Reports, vol.
6. Nature Publishing Group, 2016.
ista: Hinton J, Thewalt E, Alpichshev Z, Mahmood F, Koralek J, Chan M, Veit M, Dorow
C, Barišić N, Kemper A, Bonn D, Hardy W, Liang R, Gedik N, Greven M, Lanzara A,
Orenstein J. 2016. The rate of quasiparticle recombination probes the onset of
coherence in cuprate superconductors. Scientific Reports. 6, 23610.
mla: Hinton, James, et al. “The Rate of Quasiparticle Recombination Probes the Onset
of Coherence in Cuprate Superconductors.” Scientific Reports, vol. 6, 23610,
Nature Publishing Group, 2016, doi:10.1038/srep23610.
short: J. Hinton, E. Thewalt, Z. Alpichshev, F. Mahmood, J. Koralek, M. Chan, M.
Veit, C. Dorow, N. Barišić, A. Kemper, D. Bonn, W. Hardy, R. Liang, N. Gedik,
M. Greven, A. Lanzara, J. Orenstein, Scientific Reports 6 (2016).
date_created: 2018-12-11T11:46:12Z
date_published: 2016-04-13T00:00:00Z
date_updated: 2026-05-12T12:41:04Z
day: '13'
doi: 10.1038/srep23610
extern: '1'
external_id:
arxiv:
- '1601.05224'
pmid:
- '27071712'
intvolume: ' 6'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1038/srep23610
month: '04'
oa: 1
oa_version: Published Version
pmid: 1
publication: Scientific Reports
publication_identifier:
eissn:
- 2045-2322
publication_status: published
publisher: Nature Publishing Group
publist_id: '7439'
quality_controlled: '1'
scopus_import: '1'
status: public
title: The rate of quasiparticle recombination probes the onset of coherence in cuprate
superconductors
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
volume: 6
year: '2016'
...
---
_id: '173'
abstract:
- lang: eng
text: We calculate admissible values of r such that a square-free polynomial with
integer coefficients, no fixed prime divisor and irreducible factors of degree
at most 3 takes infinitely many values that are a product of at most r distinct
primes.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Timothy D
full_name: Browning, Timothy D
id: 35827D50-F248-11E8-B48F-1D18A9856A87
last_name: Browning
orcid: 0000-0002-8314-0177
- first_name: Andrew
full_name: Booker, Andrew
last_name: Booker
citation:
ama: Browning TD, Booker A. Square-free values of reducible polynomials. Discrete
Analysis. 2016;8:1-18. doi:10.19086/da.732
apa: Browning, T. D., & Booker, A. (2016). Square-free values of reducible polynomials.
Discrete Analysis. https://doi.org/10.19086/da.732
chicago: Browning, Timothy D, and Andrew Booker. “Square-Free Values of Reducible
Polynomials.” Discrete Analysis, 2016. https://doi.org/10.19086/da.732.
ieee: T. D. Browning and A. Booker, “Square-free values of reducible polynomials,”
Discrete Analysis, vol. 8. pp. 1–18, 2016.
ista: Browning TD, Booker A. 2016. Square-free values of reducible polynomials.
Discrete Analysis. 8, 1–18.
mla: Browning, Timothy D., and Andrew Booker. “Square-Free Values of Reducible Polynomials.”
Discrete Analysis, vol. 8, 2016, pp. 1–18, doi:10.19086/da.732.
short: T.D. Browning, A. Booker, Discrete Analysis 8 (2016) 1–18.
date_created: 2018-12-11T11:45:00Z
date_published: 2016-06-01T00:00:00Z
date_updated: 2021-01-12T06:52:49Z
day: '01'
doi: 10.19086/da.732
extern: '1'
external_id:
arxiv:
- '1511.00601'
intvolume: ' 8'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1511.00601
month: '06'
oa: 1
oa_version: Preprint
page: 1 - 18
publication: Discrete Analysis
publication_status: published
publist_id: '7748'
quality_controlled: '1'
status: public
title: Square-free values of reducible polynomials
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 8
year: '2016'
...
---
_id: '17618'
abstract:
- lang: eng
text: The largest observed supermassive black holes (SMBHs) have a mass of M_BH
~ 10^{10} M_sun, nearly independent of redshift, from the local (z~0) to the early
(z>6) Universe. We suggest that the growth of SMBHs above a few 10^{10} M_sun
is prevented by small-scale accretion physics, independent of the properties of
their host galaxies or of cosmology. Growing more massive BHs requires a gas supply
rate from galactic scales onto a nuclear region as high as >10^3 M_sun/yr. At
such a high accretion rate, most of the gas converts to stars at large radii (~10-100
pc), well before reaching the BH. We adopt a simple model (Thompson et al. 2005)
for a star-forming accretion disk, and find that the accretion rate in the sub-pc
nuclear region is reduced to the smaller value of at most a few M_sun/yr. This
prevents SMBHs from growing above ~10^{11} M_sun in the age of the Universe. Furthermore,
once a SMBH reaches a sufficiently high mass, this rate falls below the critical
value at which the accretion flow becomes advection dominated. Once this transition
occurs, BH feeding can be suppressed by strong outflows and jets from hot gas
near the BH. We find that the maximum SMBH mass, given by this transition, is
between M_{BH,max} ~ (1-6) * 10^{10} M_sun, depending primarily on the efficiency
of angular momentum transfer inside the galactic disk, and not on other properties
of the host galaxy.
article_number: '110'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Kohei
full_name: Inayoshi, Kohei
last_name: Inayoshi
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: Inayoshi K, Haiman Z. Is there a maximum mass for black holes in galactic nuclei?
The Astrophysical Journal. 2016;828(2). doi:10.3847/0004-637x/828/2/110
apa: Inayoshi, K., & Haiman, Z. (2016). Is there a maximum mass for black holes
in galactic nuclei? The Astrophysical Journal. American Astronomical Society.
https://doi.org/10.3847/0004-637x/828/2/110
chicago: Inayoshi, Kohei, and Zoltán Haiman. “Is There a Maximum Mass for Black
Holes in Galactic Nuclei?” The Astrophysical Journal. American Astronomical
Society, 2016. https://doi.org/10.3847/0004-637x/828/2/110.
ieee: K. Inayoshi and Z. Haiman, “Is there a maximum mass for black holes in galactic
nuclei?,” The Astrophysical Journal, vol. 828, no. 2. American Astronomical
Society, 2016.
ista: Inayoshi K, Haiman Z. 2016. Is there a maximum mass for black holes in galactic
nuclei? The Astrophysical Journal. 828(2), 110.
mla: Inayoshi, Kohei, and Zoltán Haiman. “Is There a Maximum Mass for Black Holes
in Galactic Nuclei?” The Astrophysical Journal, vol. 828, no. 2, 110, American
Astronomical Society, 2016, doi:10.3847/0004-637x/828/2/110.
short: K. Inayoshi, Z. Haiman, The Astrophysical Journal 828 (2016).
date_created: 2024-09-05T13:44:44Z
date_published: 2016-09-12T00:00:00Z
date_updated: 2024-09-24T08:11:51Z
day: '12'
doi: 10.3847/0004-637x/828/2/110
extern: '1'
external_id:
arxiv:
- '1601.02611'
intvolume: ' 828'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.48550/arXiv.1601.02611'
month: '09'
oa: 1
oa_version: Preprint
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Is there a maximum mass for black holes in galactic nuclei?
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 828
year: '2016'
...
---
_id: '17621'
abstract:
- lang: eng
text: We introduce an intrinsic Lyα emission-line profile reconstruction method
for high-z quasars (QSOs). This approach utilises a covariance matrix of emission-line
properties obtained from a large, moderate-z (2 ≤ z ≤ 2.5), high signal to noise
(S/N > 15) sample of BOSS QSOs. For each QSO, we complete a Monte Carlo Markov
Chain fitting of the continuum and emission-line properties and perform a visual
quality assessment to construct a large data base of robustly fit spectra. With
this data set, we construct a covariance matrix to describe the correlations between
the high-ionization emission lines Lyα, C iv, Si iv +O iv] and C iii], and find
it to be well approximated by an N-dimensional Gaussian distribution. This covariance
matrix characterizes the correlations between the linewidth, peak height and velocity
offset from systemic while also allowing for the existence of broad- and narrow-line
components for Lyα and C iv. We illustrate how this covariance matrix allows us
to statistically characterize the intrinsic Lyα line solely from the observed
spectrum redward of 1275 Å. This procedure can be used to reconstruct the intrinsic
Lyα line emission profile in cases where Lyα may otherwise be obscured. Applying
this reconstruction method to our sample of QSOs, we recovered the Lyα line flux
to within 15 per cent of the measured flux at 1205 Å (1220 Å) ∼85 (90) per cent
of the time.
article_processing_charge: No
article_type: original
author:
- first_name: Bradley
full_name: Greig, Bradley
last_name: Greig
- first_name: Andrei
full_name: Mesinger, Andrei
last_name: Mesinger
- first_name: Ian D.
full_name: McGreer, Ian D.
last_name: McGreer
- first_name: Simona
full_name: Gallerani, Simona
last_name: Gallerani
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: Greig B, Mesinger A, McGreer ID, Gallerani S, Haiman Z. Lyα emission-line reconstruction
for high-z QSOs. Monthly Notices of the Royal Astronomical Society. 2016;466(2):1814-1838.
doi:10.1093/mnras/stw3210
apa: Greig, B., Mesinger, A., McGreer, I. D., Gallerani, S., & Haiman, Z. (2016).
Lyα emission-line reconstruction for high-z QSOs. Monthly Notices of the Royal
Astronomical Society. Oxford University Press. https://doi.org/10.1093/mnras/stw3210
chicago: Greig, Bradley, Andrei Mesinger, Ian D. McGreer, Simona Gallerani, and
Zoltán Haiman. “Lyα Emission-Line Reconstruction for High-z QSOs.” Monthly
Notices of the Royal Astronomical Society. Oxford University Press, 2016.
https://doi.org/10.1093/mnras/stw3210.
ieee: B. Greig, A. Mesinger, I. D. McGreer, S. Gallerani, and Z. Haiman, “Lyα emission-line
reconstruction for high-z QSOs,” Monthly Notices of the Royal Astronomical
Society, vol. 466, no. 2. Oxford University Press, pp. 1814–1838, 2016.
ista: Greig B, Mesinger A, McGreer ID, Gallerani S, Haiman Z. 2016. Lyα emission-line
reconstruction for high-z QSOs. Monthly Notices of the Royal Astronomical Society.
466(2), 1814–1838.
mla: Greig, Bradley, et al. “Lyα Emission-Line Reconstruction for High-z QSOs.”
Monthly Notices of the Royal Astronomical Society, vol. 466, no. 2, Oxford
University Press, 2016, pp. 1814–38, doi:10.1093/mnras/stw3210.
short: B. Greig, A. Mesinger, I.D. McGreer, S. Gallerani, Z. Haiman, Monthly Notices
of the Royal Astronomical Society 466 (2016) 1814–1838.
date_created: 2024-09-05T13:49:52Z
date_published: 2016-12-10T00:00:00Z
date_updated: 2024-09-24T08:31:25Z
day: '10'
doi: 10.1093/mnras/stw3210
extern: '1'
intvolume: ' 466'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1093/mnras/stw3210
month: '12'
oa: 1
oa_version: Published Version
page: 1814-1838
publication: Monthly Notices of the Royal Astronomical Society
publication_identifier:
issn:
- 0035-8711
- 1365-2966
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
scopus_import: '1'
status: public
title: Lyα emission-line reconstruction for high-z QSOs
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 466
year: '2016'
...
---
_id: '17626'
abstract:
- lang: eng
text: "Weak gravitational lensing is becoming a mature technique for constraining
cosmological parameters, and future surveys will be able to constrain the dark
energy equation of state \U0001D464. When analyzing galaxy surveys, redshift information
has proven to be a valuable addition to angular shear correlations. We forecast
parameter constraints on the triplet (Ω\U0001D45A,\U0001D464,\U0001D70E8) for
a LSST-like photometric galaxy survey, using tomography of the shear-shear power
spectrum, convergence peak counts and higher convergence moments. We find that
redshift tomography with the power spectrum reduces the area of the 1\U0001D70E
confidence interval in (Ω\U0001D45A,\U0001D464) space by a factor of 8 with respect
to the case of the single highest redshift bin. We also find that adding non-Gaussian
information from the peak counts and higher-order moments of the convergence field
and its spatial derivatives further reduces the constrained area in (Ω\U0001D45A,\U0001D464)
by factors of 3 and 4, respectively. When we add cosmic microwave background parameter
priors from Planck to our analysis, tomography improves power spectrum constraints
by a factor of 3. Adding moments yields an improvement by an additional factor
of 2, and adding both moments and peaks improves by almost a factor of 3 over
power spectrum tomography alone. We evaluate the effect of uncorrected systematic
photometric redshift errors on the parameter constraints. We find that different
statistics lead to different bias directions in parameter space, suggesting the
possibility of eliminating this bias via self-calibration."
article_number: '063534'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Andrea
full_name: Petri, Andrea
last_name: Petri
- first_name: Morgan
full_name: May, Morgan
last_name: May
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: 'Petri A, May M, Haiman Z. Cosmology with photometric weak lensing surveys:
Constraints with redshift tomography of convergence peaks and moments. Physical
Review D. 2016;94(6). doi:10.1103/physrevd.94.063534'
apa: 'Petri, A., May, M., & Haiman, Z. (2016). Cosmology with photometric weak
lensing surveys: Constraints with redshift tomography of convergence peaks and
moments. Physical Review D. American Physical Society. https://doi.org/10.1103/physrevd.94.063534'
chicago: 'Petri, Andrea, Morgan May, and Zoltán Haiman. “Cosmology with Photometric
Weak Lensing Surveys: Constraints with Redshift Tomography of Convergence Peaks
and Moments.” Physical Review D. American Physical Society, 2016. https://doi.org/10.1103/physrevd.94.063534.'
ieee: 'A. Petri, M. May, and Z. Haiman, “Cosmology with photometric weak lensing
surveys: Constraints with redshift tomography of convergence peaks and moments,”
Physical Review D, vol. 94, no. 6. American Physical Society, 2016.'
ista: 'Petri A, May M, Haiman Z. 2016. Cosmology with photometric weak lensing surveys:
Constraints with redshift tomography of convergence peaks and moments. Physical
Review D. 94(6), 063534.'
mla: 'Petri, Andrea, et al. “Cosmology with Photometric Weak Lensing Surveys: Constraints
with Redshift Tomography of Convergence Peaks and Moments.” Physical Review
D, vol. 94, no. 6, 063534, American Physical Society, 2016, doi:10.1103/physrevd.94.063534.'
short: A. Petri, M. May, Z. Haiman, Physical Review D 94 (2016).
date_created: 2024-09-05T13:55:24Z
date_published: 2016-09-30T00:00:00Z
date_updated: 2024-09-24T08:54:34Z
day: '30'
doi: 10.1103/physrevd.94.063534
extern: '1'
external_id:
arxiv:
- '1605.01100'
intvolume: ' 94'
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.48550/arXiv.1605.01100'
month: '09'
oa: 1
oa_version: Preprint
publication: Physical Review D
publication_identifier:
issn:
- 2470-0010
- 2470-0029
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Cosmology with photometric weak lensing surveys: Constraints with redshift
tomography of convergence peaks and moments'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 94
year: '2016'
...
---
_id: '17628'
abstract:
- lang: eng
text: "Constraining cosmology using weak gravitational lensing consists of comparing
a measured feature vector of dimension \U0001D441\U0001D44F with its simulated
counterpart. An accurate estimate of the \U0001D441\U0001D44F×\U0001D441\U0001D44F
feature covariance matrix \U0001D402 is essential to obtain accurate parameter
confidence intervals. When \U0001D402 is measured from a set of simulations, an
important question is how large this set should be. To answer this question, we
construct different ensembles of \U0001D441\U0001D45F realizations of the shear
field, using a common randomization procedure that recycles the outputs from a
smaller number \U0001D441\U0001D460≤\U0001D441\U0001D45F of independent ray-tracing
\U0001D441-body simulations. We study parameter confidence intervals as a function
of (\U0001D441\U0001D460, \U0001D441\U0001D45F) in the range 1≤\U0001D441\U0001D460≤200
and 1≤\U0001D441\U0001D45F≲105. Previous work [S. Dodelson and M. D. Schneider,
Phys. Rev. D 88, 063537 (2013)] has shown that Gaussian noise in the feature vectors
(from which the covariance is estimated) lead, at quadratic order, to an \U0001D442(1/\U0001D441\U0001D45F)
degradation of the parameter confidence intervals. Using a variety of lensing
features measured in our simulations, including shear-shear power spectra and
peak counts, we show that cubic and quartic covariance fluctuations lead to additional
\U0001D442(1/\U0001D4412\U0001D45F) error degradation that is not negligible
when \U0001D441\U0001D45F is only a factor of few larger than \U0001D441\U0001D44F.
We study the large \U0001D441\U0001D45F limit, and find that a single, 240 Mpc/ℎ
sized 5123-particle \U0001D441-body simulation (\U0001D441\U0001D460=1) can be
repeatedly recycled to produce as many as \U0001D441\U0001D45F=few×104 shear maps
whose power spectra and high-significance peak counts can be treated as statistically
independent. As a result, a small number of simulations (\U0001D441\U0001D460=1
or 2) is sufficient to forecast parameter confidence intervals at percent accuracy."
article_number: '063524'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Andrea
full_name: Petri, Andrea
last_name: Petri
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Morgan
full_name: May, Morgan
last_name: May
citation:
ama: 'Petri A, Haiman Z, May M. Sample variance in weak lensing: How many simulations
are required? Physical Review D. 2016;93(6). doi:10.1103/physrevd.93.063524'
apa: 'Petri, A., Haiman, Z., & May, M. (2016). Sample variance in weak lensing:
How many simulations are required? Physical Review D. American Physical
Society. https://doi.org/10.1103/physrevd.93.063524'
chicago: 'Petri, Andrea, Zoltán Haiman, and Morgan May. “Sample Variance in Weak
Lensing: How Many Simulations Are Required?” Physical Review D. American
Physical Society, 2016. https://doi.org/10.1103/physrevd.93.063524.'
ieee: 'A. Petri, Z. Haiman, and M. May, “Sample variance in weak lensing: How many
simulations are required?,” Physical Review D, vol. 93, no. 6. American
Physical Society, 2016.'
ista: 'Petri A, Haiman Z, May M. 2016. Sample variance in weak lensing: How many
simulations are required? Physical Review D. 93(6), 063524.'
mla: 'Petri, Andrea, et al. “Sample Variance in Weak Lensing: How Many Simulations
Are Required?” Physical Review D, vol. 93, no. 6, 063524, American Physical
Society, 2016, doi:10.1103/physrevd.93.063524.'
short: A. Petri, Z. Haiman, M. May, Physical Review D 93 (2016).
date_created: 2024-09-05T13:57:57Z
date_published: 2016-03-24T00:00:00Z
date_updated: 2024-09-24T09:17:03Z
day: '24'
doi: 10.1103/physrevd.93.063524
extern: '1'
external_id:
arxiv:
- '1601.06792'
intvolume: ' 93'
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.48550/arXiv.1601.06792'
month: '03'
oa: 1
oa_version: Preprint
publication: Physical Review D
publication_identifier:
issn:
- 2470-0010
- 2470-0029
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Sample variance in weak lensing: How many simulations are required?'
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 93
year: '2016'
...
---
_id: '17649'
abstract:
- lang: eng
text: Weak lensing convergence peaks are a promising tool to probe nonlinear structure
evolution at late times, providing additional cosmological information beyond
second-order statistics. Previous theoretical and observational studies have shown
that the cosmological constraints on Ωm and σ8 are improved by a factor of up
to ~ 2 when peak counts and second-order statistics are combined, compared to
using the latter alone. We study the origin of lensing peaks using observational
data from the 154 deg2 Canada-France-Hawaii Telescope Lensing Survey. We found
that while high peaks (with height κ >3.5 σκ, where σκ is the r.m.s. of the convergence
κ) are typically due to one single massive halo of ~1015M⊙, low peaks (κ <~ σκ)
are associated with constellations of 2-8 smaller halos (<~1013M⊙). In addition,
halos responsible for forming low peaks are found to be significantly offset from
the line-of-sight towards the peak center (impact parameter >~ their virial radii),
compared with ~0.25 virial radii for halos linked with high peaks, hinting that
low peaks are more immune to baryonic processes whose impact is confined to the
inner regions of the dark matter halos. Our findings are in good agreement with
results from the simulation work by Yang el al. (2011).
article_number: '043533'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Jia
full_name: Liu, Jia
last_name: Liu
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
citation:
ama: Liu J, Haiman Z. Origin of weak lensing convergence peaks. Physical Review
D. 2016;94(4). doi:10.1103/physrevd.94.043533
apa: Liu, J., & Haiman, Z. (2016). Origin of weak lensing convergence peaks.
Physical Review D. American Physical Society. https://doi.org/10.1103/physrevd.94.043533
chicago: Liu, Jia, and Zoltán Haiman. “Origin of Weak Lensing Convergence Peaks.”
Physical Review D. American Physical Society, 2016. https://doi.org/10.1103/physrevd.94.043533.
ieee: J. Liu and Z. Haiman, “Origin of weak lensing convergence peaks,” Physical
Review D, vol. 94, no. 4. American Physical Society, 2016.
ista: Liu J, Haiman Z. 2016. Origin of weak lensing convergence peaks. Physical
Review D. 94(4), 043533.
mla: Liu, Jia, and Zoltán Haiman. “Origin of Weak Lensing Convergence Peaks.” Physical
Review D, vol. 94, no. 4, 043533, American Physical Society, 2016, doi:10.1103/physrevd.94.043533.
short: J. Liu, Z. Haiman, Physical Review D 94 (2016).
date_created: 2024-09-06T07:28:02Z
date_published: 2016-08-26T00:00:00Z
date_updated: 2024-09-24T12:59:05Z
day: '26'
doi: 10.1103/physrevd.94.043533
extern: '1'
external_id:
arxiv:
- '1606.01318'
intvolume: ' 94'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: ' https://doi.org/10.48550/arXiv.1606.01318'
month: '08'
oa: 1
oa_version: Preprint
publication: Physical Review D
publication_identifier:
issn:
- 2470-0010
- 2470-0029
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Origin of weak lensing convergence peaks
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 94
year: '2016'
...