---
_id: '7071'
abstract:
- lang: eng
text: Spin and orbital quantum numbers play a key role in the physics of Mott insulators,
but in most systems they are connected only indirectly—via the Pauli exclusion
principle and the Coulomb interaction. Iridium-based oxides (iridates) introduce
strong spin–orbit coupling directly, such that these numbers become entwined together
and the Mott physics attains a strong orbital character. In the layered honeycomb
iridates this is thought to generate highly spin–anisotropic magnetic interactions,
coupling the spin to a given spatial direction of exchange and leading to strongly
frustrated magnetism. Here we report a new iridate structure that has the same
local connectivity as the layered honeycomb and exhibits striking evidence for
highly spin–anisotropic exchange. The basic structural units of this material
suggest that a new family of three-dimensional structures could exist, the ‘harmonic
honeycomb’ iridates, of which the present compound is the first example.
article_number: '4203'
article_processing_charge: No
article_type: original
author:
- first_name: Kimberly A
full_name: Modic, Kimberly A
id: 13C26AC0-EB69-11E9-87C6-5F3BE6697425
last_name: Modic
orcid: 0000-0001-9760-3147
- first_name: Tess E.
full_name: Smidt, Tess E.
last_name: Smidt
- first_name: Itamar
full_name: Kimchi, Itamar
last_name: Kimchi
- first_name: Nicholas P.
full_name: Breznay, Nicholas P.
last_name: Breznay
- first_name: Alun
full_name: Biffin, Alun
last_name: Biffin
- first_name: Sungkyun
full_name: Choi, Sungkyun
last_name: Choi
- first_name: Roger D.
full_name: Johnson, Roger D.
last_name: Johnson
- first_name: Radu
full_name: Coldea, Radu
last_name: Coldea
- first_name: Pilanda
full_name: Watkins-Curry, Pilanda
last_name: Watkins-Curry
- first_name: Gregory T.
full_name: McCandless, Gregory T.
last_name: McCandless
- first_name: Julia Y.
full_name: Chan, Julia Y.
last_name: Chan
- first_name: Felipe
full_name: Gandara, Felipe
last_name: Gandara
- first_name: Z.
full_name: Islam, Z.
last_name: Islam
- first_name: Ashvin
full_name: Vishwanath, Ashvin
last_name: Vishwanath
- first_name: Arkady
full_name: Shekhter, Arkady
last_name: Shekhter
- first_name: Ross D.
full_name: McDonald, Ross D.
last_name: McDonald
- first_name: James G.
full_name: Analytis, James G.
last_name: Analytis
citation:
ama: Modic KA, Smidt TE, Kimchi I, et al. Realization of a three-dimensional spin–anisotropic
harmonic honeycomb iridate. Nature Communications. 2014;5. doi:10.1038/ncomms5203
apa: Modic, K. A., Smidt, T. E., Kimchi, I., Breznay, N. P., Biffin, A., Choi, S.,
… Analytis, J. G. (2014). Realization of a three-dimensional spin–anisotropic
harmonic honeycomb iridate. Nature Communications. Springer Science and
Business Media LLC. https://doi.org/10.1038/ncomms5203
chicago: Modic, Kimberly A, Tess E. Smidt, Itamar Kimchi, Nicholas P. Breznay, Alun
Biffin, Sungkyun Choi, Roger D. Johnson, et al. “Realization of a Three-Dimensional
Spin–Anisotropic Harmonic Honeycomb Iridate.” Nature Communications. Springer
Science and Business Media LLC, 2014. https://doi.org/10.1038/ncomms5203.
ieee: K. A. Modic et al., “Realization of a three-dimensional spin–anisotropic
harmonic honeycomb iridate,” Nature Communications, vol. 5. Springer Science
and Business Media LLC, 2014.
ista: Modic KA, Smidt TE, Kimchi I, Breznay NP, Biffin A, Choi S, Johnson RD, Coldea
R, Watkins-Curry P, McCandless GT, Chan JY, Gandara F, Islam Z, Vishwanath A,
Shekhter A, McDonald RD, Analytis JG. 2014. Realization of a three-dimensional
spin–anisotropic harmonic honeycomb iridate. Nature Communications. 5, 4203.
mla: Modic, Kimberly A., et al. “Realization of a Three-Dimensional Spin–Anisotropic
Harmonic Honeycomb Iridate.” Nature Communications, vol. 5, 4203, Springer
Science and Business Media LLC, 2014, doi:10.1038/ncomms5203.
short: K.A. Modic, T.E. Smidt, I. Kimchi, N.P. Breznay, A. Biffin, S. Choi, R.D.
Johnson, R. Coldea, P. Watkins-Curry, G.T. McCandless, J.Y. Chan, F. Gandara,
Z. Islam, A. Vishwanath, A. Shekhter, R.D. McDonald, J.G. Analytis, Nature Communications
5 (2014).
date_created: 2019-11-19T13:22:39Z
date_published: 2014-06-27T00:00:00Z
date_updated: 2021-01-12T08:11:42Z
day: '27'
ddc:
- '530'
doi: 10.1038/ncomms5203
extern: '1'
file:
- access_level: open_access
checksum: d290f0bfa93c5169cc6c8086874c5a78
content_type: application/pdf
creator: dernst
date_created: 2019-11-26T12:44:23Z
date_updated: 2020-07-14T12:47:48Z
file_id: '7113'
file_name: 2014_NatureComm_Modic.pdf
file_size: 4832820
relation: main_file
file_date_updated: 2020-07-14T12:47:48Z
has_accepted_license: '1'
intvolume: ' 5'
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
publication: Nature Communications
publication_identifier:
issn:
- 2041-1723
publication_status: published
publisher: Springer Science and Business Media LLC
quality_controlled: '1'
status: public
title: Realization of a three-dimensional spin–anisotropic harmonic honeycomb iridate
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: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 5
year: '2014'
...
---
_id: '7072'
abstract:
- lang: eng
text: We investigate the structural and magnetic properties of two molecule-based
magnets synthesized from the same starting components. Their different structural
motifs promote contrasting exchange pathways and consequently lead to markedly
different magnetic ground states. Through examination of their structural and
magnetic properties we show that [Cu(pyz)(H2O)(gly)2](ClO4)2 may be considered
a quasi-one-dimensional quantum Heisenberg antiferromagnet whereas the related
compound [Cu(pyz)(gly)](ClO4), which is formed from dimers of antiferromagnetically
interacting Cu2+ spins, remains disordered down to at least 0.03 K in zero field
but shows a field-temperature phase diagram reminiscent of that seen in materials
showing a Bose-Einstein condensation of magnons.
article_number: '207201'
article_processing_charge: No
article_type: original
author:
- first_name: T.
full_name: Lancaster, T.
last_name: Lancaster
- first_name: P. A.
full_name: Goddard, P. A.
last_name: Goddard
- first_name: S. J.
full_name: Blundell, S. J.
last_name: Blundell
- first_name: F. R.
full_name: Foronda, F. R.
last_name: Foronda
- first_name: S.
full_name: Ghannadzadeh, S.
last_name: Ghannadzadeh
- first_name: J. S.
full_name: Möller, J. S.
last_name: Möller
- first_name: P. J.
full_name: Baker, P. J.
last_name: Baker
- first_name: F. L.
full_name: Pratt, F. L.
last_name: Pratt
- first_name: C.
full_name: Baines, C.
last_name: Baines
- first_name: L.
full_name: Huang, L.
last_name: Huang
- first_name: J.
full_name: Wosnitza, J.
last_name: Wosnitza
- first_name: R. D.
full_name: McDonald, R. D.
last_name: McDonald
- first_name: Kimberly A
full_name: Modic, Kimberly A
id: 13C26AC0-EB69-11E9-87C6-5F3BE6697425
last_name: Modic
orcid: 0000-0001-9760-3147
- first_name: J.
full_name: Singleton, J.
last_name: Singleton
- first_name: C. V.
full_name: Topping, C. V.
last_name: Topping
- first_name: T. A. W.
full_name: Beale, T. A. W.
last_name: Beale
- first_name: F.
full_name: Xiao, F.
last_name: Xiao
- first_name: J. A.
full_name: Schlueter, J. A.
last_name: Schlueter
- first_name: A. M.
full_name: Barton, A. M.
last_name: Barton
- first_name: R. D.
full_name: Cabrera, R. D.
last_name: Cabrera
- first_name: K. E.
full_name: Carreiro, K. E.
last_name: Carreiro
- first_name: H. E.
full_name: Tran, H. E.
last_name: Tran
- first_name: J. L.
full_name: Manson, J. L.
last_name: Manson
citation:
ama: Lancaster T, Goddard PA, Blundell SJ, et al. Controlling magnetic order and
quantum disorder in molecule-based magnets. Physical Review Letters. 2014;112(20).
doi:10.1103/physrevlett.112.207201
apa: Lancaster, T., Goddard, P. A., Blundell, S. J., Foronda, F. R., Ghannadzadeh,
S., Möller, J. S., … Manson, J. L. (2014). Controlling magnetic order and quantum
disorder in molecule-based magnets. Physical Review Letters. APS. https://doi.org/10.1103/physrevlett.112.207201
chicago: Lancaster, T., P. A. Goddard, S. J. Blundell, F. R. Foronda, S. Ghannadzadeh,
J. S. Möller, P. J. Baker, et al. “Controlling Magnetic Order and Quantum Disorder
in Molecule-Based Magnets.” Physical Review Letters. APS, 2014. https://doi.org/10.1103/physrevlett.112.207201.
ieee: T. Lancaster et al., “Controlling magnetic order and quantum disorder
in molecule-based magnets,” Physical Review Letters, vol. 112, no. 20.
APS, 2014.
ista: Lancaster T, Goddard PA, Blundell SJ, Foronda FR, Ghannadzadeh S, Möller JS,
Baker PJ, Pratt FL, Baines C, Huang L, Wosnitza J, McDonald RD, Modic KA, Singleton
J, Topping CV, Beale TAW, Xiao F, Schlueter JA, Barton AM, Cabrera RD, Carreiro
KE, Tran HE, Manson JL. 2014. Controlling magnetic order and quantum disorder
in molecule-based magnets. Physical Review Letters. 112(20), 207201.
mla: Lancaster, T., et al. “Controlling Magnetic Order and Quantum Disorder in Molecule-Based
Magnets.” Physical Review Letters, vol. 112, no. 20, 207201, APS, 2014,
doi:10.1103/physrevlett.112.207201.
short: T. Lancaster, P.A. Goddard, S.J. Blundell, F.R. Foronda, S. Ghannadzadeh,
J.S. Möller, P.J. Baker, F.L. Pratt, C. Baines, L. Huang, J. Wosnitza, R.D. McDonald,
K.A. Modic, J. Singleton, C.V. Topping, T.A.W. Beale, F. Xiao, J.A. Schlueter,
A.M. Barton, R.D. Cabrera, K.E. Carreiro, H.E. Tran, J.L. Manson, Physical Review
Letters 112 (2014).
date_created: 2019-11-19T13:23:13Z
date_published: 2014-05-19T00:00:00Z
date_updated: 2021-01-12T08:11:42Z
day: '19'
doi: 10.1103/physrevlett.112.207201
extern: '1'
intvolume: ' 112'
issue: '20'
language:
- iso: eng
month: '05'
oa_version: None
publication: Physical Review Letters
publication_identifier:
eissn:
- 1079-7114
issn:
- 0031-9007
publication_status: published
publisher: APS
quality_controlled: '1'
status: public
title: Controlling magnetic order and quantum disorder in molecule-based magnets
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 112
year: '2014'
...
---
_id: '7300'
abstract:
- lang: eng
text: Photoinduced electron transfer (PET), which causes pH-dependent quenching
of fluorescent dyes, is more effectively introduced by phenolic groups than by
amino groups which have been much more commonly used so far. That is demonstrated
by fluorescence measurements involving several classes of fluorophores. Electrochemical
measurements show that PET in several amino-modified dyes is thermodynamically
favorable, even though it was not experimentally found, underlining the importance
of kinetic aspects to the process. Consequently, the attachment of phenolic groups
allows for fast and simple preparation of a wide selection of fluorescent pH-probes
with tailor-made spectral properties, sensitive ranges, and individual advantages,
so that a large number of applications can be realized. Fluorophores carrying
phenolic groups may also be used for sensing analytes other than pH or molecular
switching and signaling.
article_processing_charge: No
article_type: original
author:
- first_name: Daniel
full_name: Aigner, Daniel
last_name: Aigner
- first_name: Stefan Alexander
full_name: Freunberger, Stefan Alexander
id: A8CA28E6-CE23-11E9-AD2D-EC27E6697425
last_name: Freunberger
orcid: 0000-0003-2902-5319
- first_name: Martin
full_name: Wilkening, Martin
last_name: Wilkening
- first_name: Robert
full_name: Saf, Robert
last_name: Saf
- first_name: Sergey M.
full_name: Borisov, Sergey M.
last_name: Borisov
- first_name: Ingo
full_name: Klimant, Ingo
last_name: Klimant
citation:
ama: Aigner D, Freunberger SA, Wilkening M, Saf R, Borisov SM, Klimant I. Enhancing
photoinduced electron transfer efficiency of fluorescent pH-probes with halogenated
phenols. Analytical Chemistry. 2014;86(18):9293-9300. doi:10.1021/ac502513g
apa: Aigner, D., Freunberger, S. A., Wilkening, M., Saf, R., Borisov, S. M., &
Klimant, I. (2014). Enhancing photoinduced electron transfer efficiency of fluorescent
pH-probes with halogenated phenols. Analytical Chemistry. ACS. https://doi.org/10.1021/ac502513g
chicago: Aigner, Daniel, Stefan Alexander Freunberger, Martin Wilkening, Robert
Saf, Sergey M. Borisov, and Ingo Klimant. “Enhancing Photoinduced Electron Transfer
Efficiency of Fluorescent PH-Probes with Halogenated Phenols.” Analytical Chemistry.
ACS, 2014. https://doi.org/10.1021/ac502513g.
ieee: D. Aigner, S. A. Freunberger, M. Wilkening, R. Saf, S. M. Borisov, and I.
Klimant, “Enhancing photoinduced electron transfer efficiency of fluorescent pH-probes
with halogenated phenols,” Analytical Chemistry, vol. 86, no. 18. ACS,
pp. 9293–9300, 2014.
ista: Aigner D, Freunberger SA, Wilkening M, Saf R, Borisov SM, Klimant I. 2014.
Enhancing photoinduced electron transfer efficiency of fluorescent pH-probes with
halogenated phenols. Analytical Chemistry. 86(18), 9293–9300.
mla: Aigner, Daniel, et al. “Enhancing Photoinduced Electron Transfer Efficiency
of Fluorescent PH-Probes with Halogenated Phenols.” Analytical Chemistry,
vol. 86, no. 18, ACS, 2014, pp. 9293–300, doi:10.1021/ac502513g.
short: D. Aigner, S.A. Freunberger, M. Wilkening, R. Saf, S.M. Borisov, I. Klimant,
Analytical Chemistry 86 (2014) 9293–9300.
date_created: 2020-01-15T12:17:17Z
date_published: 2014-08-14T00:00:00Z
date_updated: 2021-01-12T08:12:53Z
day: '14'
doi: 10.1021/ac502513g
extern: '1'
intvolume: ' 86'
issue: '18'
language:
- iso: eng
month: '08'
oa_version: None
page: 9293-9300
publication: Analytical Chemistry
publication_identifier:
issn:
- 0003-2700
- 1520-6882
publication_status: published
publisher: ACS
quality_controlled: '1'
status: public
title: Enhancing photoinduced electron transfer efficiency of fluorescent pH-probes
with halogenated phenols
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 86
year: '2014'
...
---
_id: '7301'
abstract:
- lang: eng
text: Several problems arise at the O2 (positive) electrode in the Li-air battery,
including solvent/electrode decomposition and electrode passivation by insulating
Li2O2. Progress partially depends on exploring the basic electrochemistry of O2
reduction. Here we describe the effect of complexing-cations on the electrochemical
reduction of O2 in DMSO in the presence and absence of a Li salt. The solubility
of alkaline peroxides in DMSO is enhanced by the complexing-cations, consistent
with their strong interaction with reduced O2. The complexing-cations also increase
the rate of the 1-electron O2 reduction to O2•– by up to six-fold (k° = 2.4 ×10–3
to 1.5 × 10–2 cm s–1) whether or not Li+ ions are present. In the absence of Li+,
the complexing-cations also promote the reduction of O2•– to O22–. In the presence
of Li+ and complexing-cations, and despite the interaction of the reduced O2 with
the latter, SERS confirms that the product is still Li2O2.
article_processing_charge: No
article_type: original
author:
- first_name: Chunmei
full_name: Li, Chunmei
last_name: Li
- first_name: Olivier
full_name: Fontaine, Olivier
last_name: Fontaine
- first_name: Stefan Alexander
full_name: Freunberger, Stefan Alexander
id: A8CA28E6-CE23-11E9-AD2D-EC27E6697425
last_name: Freunberger
orcid: 0000-0003-2902-5319
- first_name: Lee
full_name: Johnson, Lee
last_name: Johnson
- first_name: Sylvie
full_name: Grugeon, Sylvie
last_name: Grugeon
- first_name: Stéphane
full_name: Laruelle, Stéphane
last_name: Laruelle
- first_name: Peter G.
full_name: Bruce, Peter G.
last_name: Bruce
- first_name: Michel
full_name: Armand, Michel
last_name: Armand
citation:
ama: 'Li C, Fontaine O, Freunberger SA, et al. Aprotic Li–O2 battery: Influence
of complexing agents on oxygen reduction in an aprotic solvent. The Journal
of Physical Chemistry C. 2014;118(7):3393-3401. doi:10.1021/jp4093805'
apa: 'Li, C., Fontaine, O., Freunberger, S. A., Johnson, L., Grugeon, S., Laruelle,
S., … Armand, M. (2014). Aprotic Li–O2 battery: Influence of complexing agents
on oxygen reduction in an aprotic solvent. The Journal of Physical Chemistry
C. ACS. https://doi.org/10.1021/jp4093805'
chicago: 'Li, Chunmei, Olivier Fontaine, Stefan Alexander Freunberger, Lee Johnson,
Sylvie Grugeon, Stéphane Laruelle, Peter G. Bruce, and Michel Armand. “Aprotic
Li–O2 Battery: Influence of Complexing Agents on Oxygen Reduction in an Aprotic
Solvent.” The Journal of Physical Chemistry C. ACS, 2014. https://doi.org/10.1021/jp4093805.'
ieee: 'C. Li et al., “Aprotic Li–O2 battery: Influence of complexing agents
on oxygen reduction in an aprotic solvent,” The Journal of Physical Chemistry
C, vol. 118, no. 7. ACS, pp. 3393–3401, 2014.'
ista: 'Li C, Fontaine O, Freunberger SA, Johnson L, Grugeon S, Laruelle S, Bruce
PG, Armand M. 2014. Aprotic Li–O2 battery: Influence of complexing agents on oxygen
reduction in an aprotic solvent. The Journal of Physical Chemistry C. 118(7),
3393–3401.'
mla: 'Li, Chunmei, et al. “Aprotic Li–O2 Battery: Influence of Complexing Agents
on Oxygen Reduction in an Aprotic Solvent.” The Journal of Physical Chemistry
C, vol. 118, no. 7, ACS, 2014, pp. 3393–401, doi:10.1021/jp4093805.'
short: C. Li, O. Fontaine, S.A. Freunberger, L. Johnson, S. Grugeon, S. Laruelle,
P.G. Bruce, M. Armand, The Journal of Physical Chemistry C 118 (2014) 3393–3401.
date_created: 2020-01-15T12:17:28Z
date_published: 2014-01-29T00:00:00Z
date_updated: 2021-01-12T08:12:53Z
day: '29'
doi: 10.1021/jp4093805
extern: '1'
intvolume: ' 118'
issue: '7'
language:
- iso: eng
month: '01'
oa_version: None
page: 3393-3401
publication: The Journal of Physical Chemistry C
publication_identifier:
issn:
- 1932-7447
- 1932-7455
publication_status: published
publisher: ACS
quality_controlled: '1'
status: public
title: 'Aprotic Li–O2 battery: Influence of complexing agents on oxygen reduction
in an aprotic solvent'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 118
year: '2014'
...
---
_id: '7302'
abstract:
- lang: eng
text: Understanding charge carrier transport in Li2O2, the storage material in the
non-aqueous Li-O2 battery, is key to the development of this high-energy battery.
Here, we studied ionic transport properties and Li self-diffusion in nanocrystalline
Li2O2 by conductivity and temperature variable 7Li NMR spectroscopy. Nanostructured
Li2O2, characterized by a mean crystallite size of less than 50 nm as estimated
from X-ray diffraction peak broadening, was prepared by high-energy ball milling
of microcrystalline lithium peroxide with μm sized crystallites. At room temperature
the overall conductivity σ of the microcrystalline reference sample turned out
to be very low (3.4 × 10−13 S cm−1) which is in agreement with results from temperature-variable
7Li NMR line shape measurements. Ball-milling, however, leads to an increase of
σ by approximately two orders of magnitude (1.1 × 10−10 S cm−1); correspondingly,
the activation energy decreases from 0.89 eV to 0.82 eV. The electronic contribution
σeon, however, is in the order of 9 × 10−12 S cm−1 which makes less than 10% of
the total value. Interestingly, 7Li NMR lines of nano-Li2O2 undergo pronounced
heterogeneous motional narrowing which manifests in a two-component line shape
emerging with increasing temperatures. Most likely, the enhancement in σ can be
traced back to the generation of a spin reservoir with highly mobile Li ions;
these are expected to reside in the nearest neighbourhood of defects generated
or near the structurally disordered and defect-rich interfacial regions formed
during mechanical treatment.
article_processing_charge: No
article_type: original
author:
- first_name: A.
full_name: Dunst, A.
last_name: Dunst
- first_name: V.
full_name: Epp, V.
last_name: Epp
- first_name: I.
full_name: Hanzu, I.
last_name: Hanzu
- first_name: Stefan Alexander
full_name: Freunberger, Stefan Alexander
id: A8CA28E6-CE23-11E9-AD2D-EC27E6697425
last_name: Freunberger
orcid: 0000-0003-2902-5319
- first_name: M.
full_name: Wilkening, M.
last_name: Wilkening
citation:
ama: Dunst A, Epp V, Hanzu I, Freunberger SA, Wilkening M. Short-range Li diffusion
vs. long-range ionic conduction in nanocrystalline lithium peroxide Li2O2—the
discharge product in lithium-air batteries. Energy & Environmental Science.
2014;7(8):2739-2752. doi:10.1039/c4ee00496e
apa: Dunst, A., Epp, V., Hanzu, I., Freunberger, S. A., & Wilkening, M. (2014).
Short-range Li diffusion vs. long-range ionic conduction in nanocrystalline lithium
peroxide Li2O2—the discharge product in lithium-air batteries. Energy &
Environmental Science. RSC. https://doi.org/10.1039/c4ee00496e
chicago: Dunst, A., V. Epp, I. Hanzu, Stefan Alexander Freunberger, and M. Wilkening.
“Short-Range Li Diffusion vs. Long-Range Ionic Conduction in Nanocrystalline Lithium
Peroxide Li2O2—the Discharge Product in Lithium-Air Batteries.” Energy &
Environmental Science. RSC, 2014. https://doi.org/10.1039/c4ee00496e.
ieee: A. Dunst, V. Epp, I. Hanzu, S. A. Freunberger, and M. Wilkening, “Short-range
Li diffusion vs. long-range ionic conduction in nanocrystalline lithium peroxide
Li2O2—the discharge product in lithium-air batteries,” Energy & Environmental
Science, vol. 7, no. 8. RSC, pp. 2739–2752, 2014.
ista: Dunst A, Epp V, Hanzu I, Freunberger SA, Wilkening M. 2014. Short-range Li
diffusion vs. long-range ionic conduction in nanocrystalline lithium peroxide
Li2O2—the discharge product in lithium-air batteries. Energy & Environmental
Science. 7(8), 2739–2752.
mla: Dunst, A., et al. “Short-Range Li Diffusion vs. Long-Range Ionic Conduction
in Nanocrystalline Lithium Peroxide Li2O2—the Discharge Product in Lithium-Air
Batteries.” Energy & Environmental Science, vol. 7, no. 8, RSC, 2014,
pp. 2739–52, doi:10.1039/c4ee00496e.
short: A. Dunst, V. Epp, I. Hanzu, S.A. Freunberger, M. Wilkening, Energy &
Environmental Science 7 (2014) 2739–2752.
date_created: 2020-01-15T12:17:43Z
date_published: 2014-08-01T00:00:00Z
date_updated: 2021-01-12T08:12:53Z
day: '01'
doi: 10.1039/c4ee00496e
extern: '1'
intvolume: ' 7'
issue: '8'
language:
- iso: eng
month: '08'
oa_version: Published Version
page: 2739-2752
publication: Energy & Environmental Science
publication_identifier:
issn:
- 1754-5692
- 1754-5706
publication_status: published
publisher: RSC
quality_controlled: '1'
status: public
title: Short-range Li diffusion vs. long-range ionic conduction in nanocrystalline
lithium peroxide Li2O2—the discharge product in lithium-air batteries
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 7
year: '2014'
...
---
_id: '7303'
abstract:
- lang: eng
text: The electrolyte in the non-aqueous (aprotic) lithium air battery has a profound
influence on the reactions that occur at the anode and cathode, and hence its
overall operation on discharge/charge. It must possess a wide range of attributes,
exceeding the requirements of electrolytes for Lithium ion batteries by far. The
most important additional issues are stability at both anode and cathode in the
presence of O2. The known problems with cycling the Li metal/non-aqueous electrolyte
interface are further complicated by O2. New and much less understood are the
reactions at the O2 cathode/electrolyte interface where the highly reversible
formation/decomposition of Li2O2 on discharge/charge is critical for the operation
of the non-aqueous lithium air battery. Many aprotic electrolytes exhibit decomposition
at the cathode during discharge and charge due to the presence of reactive reduced
O2 species affecting potential, capacity and kinetics on discharge and charge,
cyclability and calendar life. Identifying suitable electrolytes is one of the
key challenges for the non-aqueous lithium air battery at the present time. Following
the realisation that cyclability of such cells in the initially used organic carbonate
electrolytes is due to back-to-back irreversible reactions the stability of the
non-aqueous electrolytes became a major focus of research on rechargeable lithium
air batteries. This realisation led to the establishment of a suite of experimental
and computational methods capable of screening the stability of electrolytes.
These allow for greater mechanistic understanding of the reactivity and guide
the way towards designing more stable systems. A range of electrolytes based on
ethers, amides, sulfones, ionic liquids and dimethyl sulfoxide have been investigated.
All are more stable than the organic carbonates, but not all are equally stable.
Even though it was soon realised, by a number of groups, that ethers exhibit side
reactions on discharge and charge, they still remain the choice in many studies.
To date dimethyl sulfoxide and dimethylacetamide were identified as the most stable
electrolytes. In conjunction with the investigation of electrolyte stability the
importance of electrode stability became more prominent. The stability of the
electrolyte cannot be considered in isolation. Its stability depends on the synergy
between electrolyte and electrode. Carbon based electrodes promote electrolyte
decomposition and decompose on their own. Although great progress has been made
in only a few years, future work on aprotic electrolytes for Li-O2 batteries will
need to explore other electrolytes in the quest for yet lower cost, higher safety,
stability and low volatility.
article_processing_charge: No
author:
- first_name: Stefan Alexander
full_name: Freunberger, Stefan Alexander
id: A8CA28E6-CE23-11E9-AD2D-EC27E6697425
last_name: Freunberger
orcid: 0000-0003-2902-5319
- first_name: Yuhui
full_name: Chen, Yuhui
last_name: Chen
- first_name: Fanny
full_name: Bardé, Fanny
last_name: Bardé
- first_name: Kensuke
full_name: Takechi, Kensuke
last_name: Takechi
- first_name: Fuminori
full_name: Mizuno, Fuminori
last_name: Mizuno
- first_name: Peter G.
full_name: Bruce, Peter G.
last_name: Bruce
citation:
ama: 'Freunberger SA, Chen Y, Bardé F, Takechi K, Mizuno F, Bruce PG. Nonaqueous
Electrolytes. In: Imanishi N, Luntz AC, Bruce P, eds. The Lithium Air Battery:
Fundamentals. New York, NY: Springer Nature; 2014:23-58. doi:10.1007/978-1-4899-8062-5_2'
apa: 'Freunberger, S. A., Chen, Y., Bardé, F., Takechi, K., Mizuno, F., & Bruce,
P. G. (2014). Nonaqueous Electrolytes. In N. Imanishi, A. C. Luntz, & P. Bruce
(Eds.), The Lithium Air Battery: Fundamentals (pp. 23–58). New York, NY:
Springer Nature. https://doi.org/10.1007/978-1-4899-8062-5_2'
chicago: 'Freunberger, Stefan Alexander, Yuhui Chen, Fanny Bardé, Kensuke Takechi,
Fuminori Mizuno, and Peter G. Bruce. “Nonaqueous Electrolytes.” In The Lithium
Air Battery: Fundamentals, edited by Nobuyuki Imanishi, Alan C. Luntz, and
Peter Bruce, 23–58. New York, NY: Springer Nature, 2014. https://doi.org/10.1007/978-1-4899-8062-5_2.'
ieee: 'S. A. Freunberger, Y. Chen, F. Bardé, K. Takechi, F. Mizuno, and P. G. Bruce,
“Nonaqueous Electrolytes,” in The Lithium Air Battery: Fundamentals, N.
Imanishi, A. C. Luntz, and P. Bruce, Eds. New York, NY: Springer Nature, 2014,
pp. 23–58.'
ista: 'Freunberger SA, Chen Y, Bardé F, Takechi K, Mizuno F, Bruce PG. 2014.Nonaqueous
Electrolytes. In: The Lithium Air Battery: Fundamentals. , 23–58.'
mla: 'Freunberger, Stefan Alexander, et al. “Nonaqueous Electrolytes.” The Lithium
Air Battery: Fundamentals, edited by Nobuyuki Imanishi et al., Springer Nature,
2014, pp. 23–58, doi:10.1007/978-1-4899-8062-5_2.'
short: 'S.A. Freunberger, Y. Chen, F. Bardé, K. Takechi, F. Mizuno, P.G. Bruce,
in:, N. Imanishi, A.C. Luntz, P. Bruce (Eds.), The Lithium Air Battery: Fundamentals,
Springer Nature, New York, NY, 2014, pp. 23–58.'
date_created: 2020-01-15T12:17:55Z
date_published: 2014-03-05T00:00:00Z
date_updated: 2021-01-12T08:12:54Z
day: '05'
doi: 10.1007/978-1-4899-8062-5_2
editor:
- first_name: Nobuyuki
full_name: Imanishi, Nobuyuki
last_name: Imanishi
- first_name: Alan C.
full_name: Luntz, Alan C.
last_name: Luntz
- first_name: Peter
full_name: Bruce, Peter
last_name: Bruce
extern: '1'
language:
- iso: eng
month: '03'
oa_version: None
page: 23-58
place: New York, NY
publication: 'The Lithium Air Battery: Fundamentals'
publication_identifier:
eisbn:
- '9781489980625'
isbn:
- '9781489980618'
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
status: public
title: Nonaqueous Electrolytes
type: book_chapter
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2014'
...
---
_id: '7304'
abstract:
- lang: eng
text: Lithium-air batteries have received extraordinary attention recently owing
to their theoretical gravimetric energies being considerably higher than those
of Li-ion batteries. There are, however, significant challenges to practical implementation,
including low energy efficiency, cycle life, and power capability. These are due
primarily to the lack of fundamental understanding of oxygen reduction and evolution
reaction kinetics and parasitic reactions between oxygen redox intermediate species
and nominally inactive battery components such as carbon in the oxygen electrode
and electrolytes. In this article, we discuss recent advances in the mechanistic
understanding of oxygen redox reactions in nonaqueous electrolytes and the search
for electrolytes and electrode materials that are chemically stable in the oxygen
electrode. In addition, methods to protect lithium metal against corrosion by
water and dendrite formation in aqueous lithium-air batteries are discussed. Further
materials innovations lie at the heart of research and development efforts that
are needed to enable the development of lithium-oxygen batteries with enhanced
round-trip efficiency and cycle life.
article_processing_charge: No
article_type: original
author:
- first_name: D.G.
full_name: Kwabi, D.G.
last_name: Kwabi
- first_name: N.
full_name: Ortiz-Vitoriano, N.
last_name: Ortiz-Vitoriano
- first_name: Stefan Alexander
full_name: Freunberger, Stefan Alexander
id: A8CA28E6-CE23-11E9-AD2D-EC27E6697425
last_name: Freunberger
orcid: 0000-0003-2902-5319
- first_name: Y.
full_name: Chen, Y.
last_name: Chen
- first_name: N.
full_name: Imanishi, N.
last_name: Imanishi
- first_name: P.G.
full_name: Bruce, P.G.
last_name: Bruce
- first_name: Y.
full_name: Shao-Horn, Y.
last_name: Shao-Horn
citation:
ama: Kwabi DG, Ortiz-Vitoriano N, Freunberger SA, et al. Materials challenges in
rechargeable lithium-air batteries. MRS Bulletin. 2014;39(5):443-452. doi:10.1557/mrs.2014.87
apa: Kwabi, D. G., Ortiz-Vitoriano, N., Freunberger, S. A., Chen, Y., Imanishi,
N., Bruce, P. G., & Shao-Horn, Y. (2014). Materials challenges in rechargeable
lithium-air batteries. MRS Bulletin. CUP. https://doi.org/10.1557/mrs.2014.87
chicago: Kwabi, D.G., N. Ortiz-Vitoriano, Stefan Alexander Freunberger, Y. Chen,
N. Imanishi, P.G. Bruce, and Y. Shao-Horn. “Materials Challenges in Rechargeable
Lithium-Air Batteries.” MRS Bulletin. CUP, 2014. https://doi.org/10.1557/mrs.2014.87.
ieee: D. G. Kwabi et al., “Materials challenges in rechargeable lithium-air
batteries,” MRS Bulletin, vol. 39, no. 5. CUP, pp. 443–452, 2014.
ista: Kwabi DG, Ortiz-Vitoriano N, Freunberger SA, Chen Y, Imanishi N, Bruce PG,
Shao-Horn Y. 2014. Materials challenges in rechargeable lithium-air batteries.
MRS Bulletin. 39(5), 443–452.
mla: Kwabi, D. G., et al. “Materials Challenges in Rechargeable Lithium-Air Batteries.”
MRS Bulletin, vol. 39, no. 5, CUP, 2014, pp. 443–52, doi:10.1557/mrs.2014.87.
short: D.G. Kwabi, N. Ortiz-Vitoriano, S.A. Freunberger, Y. Chen, N. Imanishi, P.G.
Bruce, Y. Shao-Horn, MRS Bulletin 39 (2014) 443–452.
date_created: 2020-01-15T12:18:05Z
date_published: 2014-05-01T00:00:00Z
date_updated: 2021-01-12T08:12:54Z
day: '01'
doi: 10.1557/mrs.2014.87
extern: '1'
intvolume: ' 39'
issue: '5'
language:
- iso: eng
month: '05'
oa_version: None
page: 443-452
publication: MRS Bulletin
publication_identifier:
issn:
- 0883-7694
- 1938-1425
publication_status: published
publisher: CUP
quality_controlled: '1'
status: public
title: Materials challenges in rechargeable lithium-air batteries
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 39
year: '2014'
...
---
_id: '7305'
abstract:
- lang: eng
text: When lithium–oxygen batteries discharge, O2 is reduced at the cathode to form
solid Li2O2. Understanding the fundamental mechanism of O2 reduction in aprotic
solvents is therefore essential to realizing their technological potential. Two
different models have been proposed for Li2O2 formation, involving either solution
or electrode surface routes. Here, we describe a single unified mechanism, which,
unlike previous models, can explain O2 reduction across the whole range of solvents
and for which the two previous models are limiting cases. We observe that the
solvent influences O2 reduction through its effect on the solubility of LiO2,
or, more precisely, the free energy of the reaction LiO2* ⇌ Li(sol)+ + O2−(sol) + ion
pairs + higher aggregates (clusters). The unified mechanism shows that low-donor-number
solvents are likely to lead to premature cell death, and that the future direction
of research for lithium–oxygen batteries should focus on the search for new, stable,
high-donor-number electrolytes, because they can support higher capacities and
can better sustain discharge.
article_processing_charge: No
article_type: original
author:
- first_name: Lee
full_name: Johnson, Lee
last_name: Johnson
- first_name: Chunmei
full_name: Li, Chunmei
last_name: Li
- first_name: Zheng
full_name: Liu, Zheng
last_name: Liu
- first_name: Yuhui
full_name: Chen, Yuhui
last_name: Chen
- first_name: Stefan Alexander
full_name: Freunberger, Stefan Alexander
id: A8CA28E6-CE23-11E9-AD2D-EC27E6697425
last_name: Freunberger
orcid: 0000-0003-2902-5319
- first_name: Praveen C.
full_name: Ashok, Praveen C.
last_name: Ashok
- first_name: Bavishna B.
full_name: Praveen, Bavishna B.
last_name: Praveen
- first_name: Kishan
full_name: Dholakia, Kishan
last_name: Dholakia
- first_name: Jean-Marie
full_name: Tarascon, Jean-Marie
last_name: Tarascon
- first_name: Peter G.
full_name: Bruce, Peter G.
last_name: Bruce
citation:
ama: Johnson L, Li C, Liu Z, et al. The role of LiO2 solubility in O2 reduction
in aprotic solvents and its consequences for Li–O2 batteries. Nature Chemistry.
2014;6(12):1091-1099. doi:10.1038/nchem.2101
apa: Johnson, L., Li, C., Liu, Z., Chen, Y., Freunberger, S. A., Ashok, P. C., …
Bruce, P. G. (2014). The role of LiO2 solubility in O2 reduction in aprotic solvents
and its consequences for Li–O2 batteries. Nature Chemistry. Springer Nature.
https://doi.org/10.1038/nchem.2101
chicago: Johnson, Lee, Chunmei Li, Zheng Liu, Yuhui Chen, Stefan Alexander Freunberger,
Praveen C. Ashok, Bavishna B. Praveen, Kishan Dholakia, Jean-Marie Tarascon, and
Peter G. Bruce. “The Role of LiO2 Solubility in O2 Reduction in Aprotic Solvents
and Its Consequences for Li–O2 Batteries.” Nature Chemistry. Springer Nature,
2014. https://doi.org/10.1038/nchem.2101.
ieee: L. Johnson et al., “The role of LiO2 solubility in O2 reduction in
aprotic solvents and its consequences for Li–O2 batteries,” Nature Chemistry,
vol. 6, no. 12. Springer Nature, pp. 1091–1099, 2014.
ista: Johnson L, Li C, Liu Z, Chen Y, Freunberger SA, Ashok PC, Praveen BB, Dholakia
K, Tarascon J-M, Bruce PG. 2014. The role of LiO2 solubility in O2 reduction in
aprotic solvents and its consequences for Li–O2 batteries. Nature Chemistry. 6(12),
1091–1099.
mla: Johnson, Lee, et al. “The Role of LiO2 Solubility in O2 Reduction in Aprotic
Solvents and Its Consequences for Li–O2 Batteries.” Nature Chemistry, vol.
6, no. 12, Springer Nature, 2014, pp. 1091–99, doi:10.1038/nchem.2101.
short: L. Johnson, C. Li, Z. Liu, Y. Chen, S.A. Freunberger, P.C. Ashok, B.B. Praveen,
K. Dholakia, J.-M. Tarascon, P.G. Bruce, Nature Chemistry 6 (2014) 1091–1099.
date_created: 2020-01-15T12:18:18Z
date_published: 2014-11-10T00:00:00Z
date_updated: 2021-01-12T08:12:55Z
day: '10'
doi: 10.1038/nchem.2101
extern: '1'
intvolume: ' 6'
issue: '12'
language:
- iso: eng
month: '11'
oa_version: None
page: 1091-1099
publication: Nature Chemistry
publication_identifier:
issn:
- 1755-4330
- 1755-4349
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
link:
- relation: erratum
url: https://doi.org/10.1038/nchem.2138
status: public
title: The role of LiO2 solubility in O2 reduction in aprotic solvents and its consequences
for Li–O2 batteries
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 6
year: '2014'
...
---
_id: '7361'
abstract:
- lang: eng
text: Bistable switches are fundamental regulatory elements of complex systems,
ranging from electronics to living cells. Designed genetic toggle switches have
been constructed from pairs of natural transcriptional repressors wired to inhibit
one another. The complexity of the engineered regulatory circuits can be increased
using orthogonal transcriptional regulators based on designed DNA-binding domains.
However, a mutual repressor-based toggle switch comprising DNA-binding domains
of transcription-activator-like effectors (TALEs) did not support bistability
in mammalian cells. Here, the challenge of engineering a bistable switch based
on monomeric DNA-binding domains is solved via the introduction of a positive
feedback loop composed of activators based on the same TALE domains as their opposing
repressors and competition for the same DNA operator site. This design introduces
nonlinearity and results in epigenetic bistability. This principle could be used
to employ other monomeric DNA-binding domains such as CRISPR for applications
ranging from reprogramming cells to building digital biological memory.
article_number: '5007'
article_processing_charge: No
article_type: original
author:
- first_name: Tina
full_name: Lebar, Tina
last_name: Lebar
- first_name: Urban
full_name: Bezeljak, Urban
id: 2A58201A-F248-11E8-B48F-1D18A9856A87
last_name: Bezeljak
orcid: 0000-0003-1365-5631
- first_name: Anja
full_name: Golob, Anja
last_name: Golob
- first_name: Miha
full_name: Jerala, Miha
last_name: Jerala
- first_name: Lucija
full_name: Kadunc, Lucija
last_name: Kadunc
- first_name: Boštjan
full_name: Pirš, Boštjan
last_name: Pirš
- first_name: Martin
full_name: Stražar, Martin
last_name: Stražar
- first_name: Dušan
full_name: Vučko, Dušan
last_name: Vučko
- first_name: Uroš
full_name: Zupančič, Uroš
last_name: Zupančič
- first_name: Mojca
full_name: Benčina, Mojca
last_name: Benčina
- first_name: Vida
full_name: Forstnerič, Vida
last_name: Forstnerič
- first_name: Rok
full_name: Gaber, Rok
last_name: Gaber
- first_name: Jan
full_name: Lonzarić, Jan
last_name: Lonzarić
- first_name: Andreja
full_name: Majerle, Andreja
last_name: Majerle
- first_name: Alja
full_name: Oblak, Alja
last_name: Oblak
- first_name: Anže
full_name: Smole, Anže
last_name: Smole
- first_name: Roman
full_name: Jerala, Roman
last_name: Jerala
citation:
ama: Lebar T, Bezeljak U, Golob A, et al. A bistable genetic switch based on designable
DNA-binding domains. Nature Communications. 2014;5(1). doi:10.1038/ncomms6007
apa: Lebar, T., Bezeljak, U., Golob, A., Jerala, M., Kadunc, L., Pirš, B., … Jerala,
R. (2014). A bistable genetic switch based on designable DNA-binding domains.
Nature Communications. Springer Nature. https://doi.org/10.1038/ncomms6007
chicago: Lebar, Tina, Urban Bezeljak, Anja Golob, Miha Jerala, Lucija Kadunc, Boštjan
Pirš, Martin Stražar, et al. “A Bistable Genetic Switch Based on Designable DNA-Binding
Domains.” Nature Communications. Springer Nature, 2014. https://doi.org/10.1038/ncomms6007.
ieee: T. Lebar et al., “A bistable genetic switch based on designable DNA-binding
domains,” Nature Communications, vol. 5, no. 1. Springer Nature, 2014.
ista: Lebar T, Bezeljak U, Golob A, Jerala M, Kadunc L, Pirš B, Stražar M, Vučko
D, Zupančič U, Benčina M, Forstnerič V, Gaber R, Lonzarić J, Majerle A, Oblak
A, Smole A, Jerala R. 2014. A bistable genetic switch based on designable DNA-binding
domains. Nature Communications. 5(1), 5007.
mla: Lebar, Tina, et al. “A Bistable Genetic Switch Based on Designable DNA-Binding
Domains.” Nature Communications, vol. 5, no. 1, 5007, Springer Nature,
2014, doi:10.1038/ncomms6007.
short: T. Lebar, U. Bezeljak, A. Golob, M. Jerala, L. Kadunc, B. Pirš, M. Stražar,
D. Vučko, U. Zupančič, M. Benčina, V. Forstnerič, R. Gaber, J. Lonzarić, A. Majerle,
A. Oblak, A. Smole, R. Jerala, Nature Communications 5 (2014).
date_created: 2020-01-25T15:57:17Z
date_published: 2014-09-29T00:00:00Z
date_updated: 2021-01-12T08:13:15Z
day: '29'
doi: 10.1038/ncomms6007
extern: '1'
external_id:
pmid:
- '25264186'
intvolume: ' 5'
issue: '1'
language:
- iso: eng
month: '09'
oa_version: None
pmid: 1
publication: Nature Communications
publication_identifier:
issn:
- 2041-1723
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
status: public
title: A bistable genetic switch based on designable DNA-binding domains
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 5
year: '2014'
...
---
_id: '7455'
abstract:
- lang: eng
text: 'The reaction between NiO and (0001)- and ([1\bar102])-oriented Al2O3 single
crystals has been investigated on model experimental systems by using the ReflEXAFS
technique. Depth-sensitive information is obtained by collecting data above and
below the critical angle for total reflection. A systematic protocol for data
analysis, based on the recently developed CARD code, was implemented, and a detailed
description of the reactive systems was obtained. In particular, for ([1\bar102])-oriented
Al2O3, the reaction with NiO is almost complete after heating for 6 h at 1273 K,
and an almost uniform layer of spinel is found below a mixed (NiO + spinel) layer
at the very upmost part of the sample. In the case of the (0001)-oriented Al2O3,
for the same temperature and heating time, the reaction shows a lower advancement
degree and a residual fraction of at least 30% NiO is detected in the ReflEXAFS
spectra. '
article_processing_charge: No
article_type: original
author:
- first_name: Tommaso
full_name: Costanzo, Tommaso
id: D93824F4-D9BA-11E9-BB12-F207E6697425
last_name: Costanzo
orcid: 0000-0001-9732-3815
- first_name: Federico
full_name: Benzi, Federico
last_name: Benzi
- first_name: Paolo
full_name: Ghigna, Paolo
last_name: Ghigna
- first_name: Sonia
full_name: Pin, Sonia
last_name: Pin
- first_name: Giorgio
full_name: Spinolo, Giorgio
last_name: Spinolo
- first_name: Francesco
full_name: d'Acapito, Francesco
last_name: d'Acapito
citation:
ama: Costanzo T, Benzi F, Ghigna P, Pin S, Spinolo G, d’Acapito F. Studying the
surface reaction between NiO and Al2O3viatotal reflection EXAFS (ReflEXAFS). Journal
of Synchrotron Radiation. 2014;21(2):395-400. doi:10.1107/s1600577513031299
apa: Costanzo, T., Benzi, F., Ghigna, P., Pin, S., Spinolo, G., & d’Acapito,
F. (2014). Studying the surface reaction between NiO and Al2O3viatotal reflection
EXAFS (ReflEXAFS). Journal of Synchrotron Radiation. International Union
of Crystallography. https://doi.org/10.1107/s1600577513031299
chicago: Costanzo, Tommaso, Federico Benzi, Paolo Ghigna, Sonia Pin, Giorgio Spinolo,
and Francesco d’Acapito. “Studying the Surface Reaction between NiO and Al2O3viatotal
Reflection EXAFS (ReflEXAFS).” Journal of Synchrotron Radiation. International
Union of Crystallography, 2014. https://doi.org/10.1107/s1600577513031299.
ieee: T. Costanzo, F. Benzi, P. Ghigna, S. Pin, G. Spinolo, and F. d’Acapito, “Studying
the surface reaction between NiO and Al2O3viatotal reflection EXAFS (ReflEXAFS),”
Journal of Synchrotron Radiation, vol. 21, no. 2. International Union of
Crystallography, pp. 395–400, 2014.
ista: Costanzo T, Benzi F, Ghigna P, Pin S, Spinolo G, d’Acapito F. 2014. Studying
the surface reaction between NiO and Al2O3viatotal reflection EXAFS (ReflEXAFS).
Journal of Synchrotron Radiation. 21(2), 395–400.
mla: Costanzo, Tommaso, et al. “Studying the Surface Reaction between NiO and Al2O3viatotal
Reflection EXAFS (ReflEXAFS).” Journal of Synchrotron Radiation, vol. 21,
no. 2, International Union of Crystallography, 2014, pp. 395–400, doi:10.1107/s1600577513031299.
short: T. Costanzo, F. Benzi, P. Ghigna, S. Pin, G. Spinolo, F. d’Acapito, Journal
of Synchrotron Radiation 21 (2014) 395–400.
date_created: 2020-02-05T14:14:48Z
date_published: 2014-01-10T00:00:00Z
date_updated: 2023-02-23T13:08:22Z
day: '10'
doi: 10.1107/s1600577513031299
extern: '1'
intvolume: ' 21'
issue: '2'
language:
- iso: eng
month: '01'
oa_version: None
page: 395-400
publication: Journal of Synchrotron Radiation
publication_identifier:
issn:
- 1600-5775
publication_status: published
publisher: International Union of Crystallography
quality_controlled: '1'
status: public
title: Studying the surface reaction between NiO and Al2O3viatotal reflection EXAFS
(ReflEXAFS)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 21
year: '2014'
...
---
_id: '9888'
abstract:
- lang: eng
text: Detailed description of the experimental prodedures, data analyses and additional
statistical analyses of the results.
article_processing_charge: No
author:
- first_name: Stephan
full_name: Wolf, Stephan
last_name: Wolf
- first_name: Dino
full_name: Mcmahon, Dino
last_name: Mcmahon
- first_name: Ka
full_name: Lim, Ka
last_name: Lim
- first_name: Christopher
full_name: Pull, Christopher
id: 3C7F4840-F248-11E8-B48F-1D18A9856A87
last_name: Pull
orcid: 0000-0003-1122-3982
- first_name: Suzanne
full_name: Clark, Suzanne
last_name: Clark
- first_name: Robert
full_name: Paxton, Robert
last_name: Paxton
- first_name: Juliet
full_name: Osborne, Juliet
last_name: Osborne
citation:
ama: Wolf S, Mcmahon D, Lim K, et al. Supporting information. 2014. doi:10.1371/journal.pone.0103989.s003
apa: Wolf, S., Mcmahon, D., Lim, K., Pull, C., Clark, S., Paxton, R., & Osborne,
J. (2014). Supporting information. Public Library of Science. https://doi.org/10.1371/journal.pone.0103989.s003
chicago: Wolf, Stephan, Dino Mcmahon, Ka Lim, Christopher Pull, Suzanne Clark, Robert
Paxton, and Juliet Osborne. “Supporting Information.” Public Library of Science,
2014. https://doi.org/10.1371/journal.pone.0103989.s003.
ieee: S. Wolf et al., “Supporting information.” Public Library of Science,
2014.
ista: Wolf S, Mcmahon D, Lim K, Pull C, Clark S, Paxton R, Osborne J. 2014. Supporting
information, Public Library of Science, 10.1371/journal.pone.0103989.s003.
mla: Wolf, Stephan, et al. Supporting Information. Public Library of Science,
2014, doi:10.1371/journal.pone.0103989.s003.
short: S. Wolf, D. Mcmahon, K. Lim, C. Pull, S. Clark, R. Paxton, J. Osborne, (2014).
date_created: 2021-08-11T14:17:53Z
date_updated: 2025-09-29T11:45:40Z
day: '06'
department:
- _id: SyCr
doi: 10.1371/journal.pone.0103989.s003
month: '08'
oa_version: Published Version
publisher: Public Library of Science
related_material:
record:
- id: '2086'
relation: used_in_publication
status: public
status: public
title: Supporting information
type: research_data_reference
user_id: 6785fbc1-c503-11eb-8a32-93094b40e1cf
year: '2014'
...
---
_id: '9931'
abstract:
- lang: eng
text: Gene duplication is important in evolution, because it provides new raw material
for evolutionary adaptations. Several existing hypotheses about the causes of
duplicate retention and diversification differ in their emphasis on gene dosage,
subfunctionalization, and neofunctionalization. Little experimental data exist
on the relative importance of gene expression changes and changes in coding regions
for the evolution of duplicate genes. Furthermore, we do not know how strongly
the environment could affect this importance. To address these questions, we performed
evolution experiments with the TEM-1 beta lactamase gene in Escherichia coli to
study the initial stages of duplicate gene evolution in the laboratory. We mimicked
tandem duplication by inserting two copies of the TEM-1 gene on the same plasmid.
We then subjected these copies to repeated cycles of mutagenesis and selection
in various environments that contained antibiotics in different combinations and
concentrations. Our experiments showed that gene dosage is the most important
factor in the initial stages of duplicate gene evolution, and overshadows the
importance of point mutations in the coding region.
acknowledgement: We thank the Functional Genomics Center Zurich for its service in
generating sequencing data, M. Ackermann and E. Hayden for helpful discussions,
A. de Visser for comments on earlier versions of this manuscript, and M. Moser for
help with quantitative PCR. This work was supported by Swiss National Science Foundation
(grant 315230–129708), as well as through the YeastX project of SystemsX.ch, and
the University Priority Research Program in Systems Biology at the University of
Zurich. RD acknowledges support from the Forschungskredit program of the University
of Zurich. The authors declare no conflict of interest.
article_processing_charge: No
article_type: original
author:
- first_name: Riddhiman
full_name: Dhar, Riddhiman
last_name: Dhar
- first_name: Tobias
full_name: Bergmiller, Tobias
id: 2C471CFA-F248-11E8-B48F-1D18A9856A87
last_name: Bergmiller
orcid: 0000-0001-5396-4346
- first_name: Andreas
full_name: Wagner, Andreas
last_name: Wagner
citation:
ama: Dhar R, Bergmiller T, Wagner A. Increased gene dosage plays a predominant role
in the initial stages of evolution of duplicate TEM-1 beta lactamase genes. Evolution.
2014;68(6):1775-1791. doi:10.1111/evo.12373
apa: Dhar, R., Bergmiller, T., & Wagner, A. (2014). Increased gene dosage plays
a predominant role in the initial stages of evolution of duplicate TEM-1 beta
lactamase genes. Evolution. Wiley. https://doi.org/10.1111/evo.12373
chicago: Dhar, Riddhiman, Tobias Bergmiller, and Andreas Wagner. “Increased Gene
Dosage Plays a Predominant Role in the Initial Stages of Evolution of Duplicate
TEM-1 Beta Lactamase Genes.” Evolution. Wiley, 2014. https://doi.org/10.1111/evo.12373.
ieee: R. Dhar, T. Bergmiller, and A. Wagner, “Increased gene dosage plays a predominant
role in the initial stages of evolution of duplicate TEM-1 beta lactamase genes,”
Evolution, vol. 68, no. 6. Wiley, pp. 1775–1791, 2014.
ista: Dhar R, Bergmiller T, Wagner A. 2014. Increased gene dosage plays a predominant
role in the initial stages of evolution of duplicate TEM-1 beta lactamase genes.
Evolution. 68(6), 1775–1791.
mla: Dhar, Riddhiman, et al. “Increased Gene Dosage Plays a Predominant Role in
the Initial Stages of Evolution of Duplicate TEM-1 Beta Lactamase Genes.” Evolution,
vol. 68, no. 6, Wiley, 2014, pp. 1775–91, doi:10.1111/evo.12373.
short: R. Dhar, T. Bergmiller, A. Wagner, Evolution 68 (2014) 1775–1791.
date_created: 2021-08-17T09:03:09Z
date_published: 2014-06-03T00:00:00Z
date_updated: 2025-09-29T13:20:48Z
day: '03'
department:
- _id: CaGu
doi: 10.1111/evo.12373
external_id:
isi:
- '000337558900019'
pmid:
- '24495000'
intvolume: ' 68'
isi: 1
issue: '6'
language:
- iso: eng
month: '06'
oa_version: None
page: 1775-1791
pmid: 1
publication: Evolution
publication_identifier:
eissn:
- 1558-5646
issn:
- 0014-3820
publication_status: published
publisher: Wiley
quality_controlled: '1'
related_material:
record:
- id: '9932'
relation: research_data
status: public
scopus_import: '1'
status: public
title: Increased gene dosage plays a predominant role in the initial stages of evolution
of duplicate TEM-1 beta lactamase genes
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 68
year: '2014'
...
---
_id: '9932'
abstract:
- lang: eng
text: Gene duplication is important in evolution, because it provides new raw material
for evolutionary adaptations. Several existing hypotheses about the causes of
duplicate retention and diversification differ in their emphasis on gene dosage,
sub-functionalization, and neo-functionalization. Little experimental data exists
on the relative importance of gene expression changes and changes in coding regions
for the evolution of duplicate genes. Furthermore, we do not know how strongly
the environment could affect this importance. To address these questions, we performed
evolution experiments with the TEM-1 beta lactamase gene in E. coli to study the
initial stages of duplicate gene evolution in the laboratory. We mimicked tandem
duplication by inserting two copies of the TEM-1 gene on the same plasmid. We
then subjected these copies to repeated cycles of mutagenesis and selection in
various environments that contained antibiotics in different combinations and
concentrations. Our experiments showed that gene dosage is the most important
factor in the initial stages of duplicate gene evolution, and overshadows the
importance of point mutations in the coding region.
article_processing_charge: No
author:
- first_name: Riddhiman
full_name: Dhar, Riddhiman
last_name: Dhar
- first_name: Tobias
full_name: Bergmiller, Tobias
id: 2C471CFA-F248-11E8-B48F-1D18A9856A87
last_name: Bergmiller
orcid: 0000-0001-5396-4346
- first_name: Andreas
full_name: Wagner, Andreas
last_name: Wagner
citation:
ama: 'Dhar R, Bergmiller T, Wagner A. Data from: Increased gene dosage plays a predominant
role in the initial stages of evolution of duplicate TEM-1 beta lactamase genes.
2014. doi:10.5061/dryad.jc402'
apa: 'Dhar, R., Bergmiller, T., & Wagner, A. (2014). Data from: Increased gene
dosage plays a predominant role in the initial stages of evolution of duplicate
TEM-1 beta lactamase genes. Dryad. https://doi.org/10.5061/dryad.jc402'
chicago: 'Dhar, Riddhiman, Tobias Bergmiller, and Andreas Wagner. “Data from: Increased
Gene Dosage Plays a Predominant Role in the Initial Stages of Evolution of Duplicate
TEM-1 Beta Lactamase Genes.” Dryad, 2014. https://doi.org/10.5061/dryad.jc402.'
ieee: 'R. Dhar, T. Bergmiller, and A. Wagner, “Data from: Increased gene dosage
plays a predominant role in the initial stages of evolution of duplicate TEM-1
beta lactamase genes.” Dryad, 2014.'
ista: 'Dhar R, Bergmiller T, Wagner A. 2014. Data from: Increased gene dosage plays
a predominant role in the initial stages of evolution of duplicate TEM-1 beta
lactamase genes, Dryad, 10.5061/dryad.jc402.'
mla: 'Dhar, Riddhiman, et al. Data from: Increased Gene Dosage Plays a Predominant
Role in the Initial Stages of Evolution of Duplicate TEM-1 Beta Lactamase Genes.
Dryad, 2014, doi:10.5061/dryad.jc402.'
short: R. Dhar, T. Bergmiller, A. Wagner, (2014).
date_created: 2021-08-17T09:11:40Z
date_published: 2014-01-27T00:00:00Z
date_updated: 2025-09-29T13:20:47Z
day: '27'
department:
- _id: CaGu
doi: 10.5061/dryad.jc402
main_file_link:
- open_access: '1'
url: https://doi.org/10.5061/dryad.jc402
month: '01'
oa: 1
oa_version: Published Version
publisher: Dryad
related_material:
record:
- id: '9931'
relation: used_in_publication
status: public
status: public
title: 'Data from: Increased gene dosage plays a predominant role in the initial stages
of evolution of duplicate TEM-1 beta lactamase genes'
type: research_data_reference
user_id: 6785fbc1-c503-11eb-8a32-93094b40e1cf
year: '2014'
...
---
OA_type: closed access
_id: '22092'
abstract:
- lang: eng
text: 'The first part of the book provides an introduction to key tools and techniques
in dispersive equations: Strichartz estimates, bilinear estimates, modulation
and adapted function spaces, with an application to the generalized Korteweg-de
Vries equation and the Kadomtsev-Petviashvili equation. The energy-critical nonlinear
Schrödinger equation, global solutions to the defocusing problem, and scattering
are the focus of the second part. Using this concrete example, it walks the reader
through the induction on energy technique, which has become the essential methodology
for tackling large data critical problems. This includes refined/inverse Strichartz
estimates, the existence and almost periodicity of minimal blow up solutions,
and the development of long-time Strichartz inequalities. The third part describes
wave and Schrödinger maps. Starting by building heuristics about multilinear estimates,
it provides a detailed outline of this very active area of geometric/dispersive
PDE. It focuses on concepts and ideas and should provide graduate students with
a stepping stone to this exciting direction of research.'
alternative_title:
- Oberwolfach Seminars
article_processing_charge: No
author:
- first_name: Herbert
full_name: Koch, Herbert
last_name: Koch
- first_name: Daniel
full_name: Tataru, Daniel
last_name: Tataru
- first_name: Monica
full_name: Visan, Monica
id: 056daca0-b8d1-11f0-964f-f91054abf8ca
last_name: Visan
citation:
ama: 'Koch H, Tataru D, Vişan M. Dispersive Equations and Nonlinear Waves: Generalized
Korteweg–de Vries, Nonlinear Schrödinger, Wave and Schrödinger Maps. Vol 45.
1st ed. Basel: Springer; 2014. doi:10.1007/978-3-0348-0736-4'
apa: 'Koch, H., Tataru, D., & Vişan, M. (2014). Dispersive Equations and
Nonlinear Waves: Generalized Korteweg–de Vries, Nonlinear Schrödinger, Wave and
Schrödinger Maps (1st ed., Vol. 45). Basel: Springer. https://doi.org/10.1007/978-3-0348-0736-4'
chicago: 'Koch, Herbert, Daniel Tataru, and Monica Vişan. Dispersive Equations
and Nonlinear Waves: Generalized Korteweg–de Vries, Nonlinear Schrödinger, Wave
and Schrödinger Maps. 1st ed. Vol. 45. OWS. Basel: Springer, 2014. https://doi.org/10.1007/978-3-0348-0736-4.'
ieee: 'H. Koch, D. Tataru, and M. Vişan, Dispersive Equations and Nonlinear Waves:
Generalized Korteweg–de Vries, Nonlinear Schrödinger, Wave and Schrödinger Maps,
1st ed., vol. 45. Basel: Springer, 2014.'
ista: 'Koch H, Tataru D, Vişan M. 2014. Dispersive Equations and Nonlinear Waves:
Generalized Korteweg–de Vries, Nonlinear Schrödinger, Wave and Schrödinger Maps
1st ed., Basel: Springer, 312p.'
mla: 'Koch, Herbert, et al. Dispersive Equations and Nonlinear Waves: Generalized
Korteweg–de Vries, Nonlinear Schrödinger, Wave and Schrödinger Maps. 1st ed.,
vol. 45, Springer, 2014, doi:10.1007/978-3-0348-0736-4.'
short: 'H. Koch, D. Tataru, M. Vişan, Dispersive Equations and Nonlinear Waves:
Generalized Korteweg–de Vries, Nonlinear Schrödinger, Wave and Schrödinger Maps,
1st ed., Springer, Basel, 2014.'
date_created: 2026-06-19T08:54:09Z
date_published: 2014-07-31T00:00:00Z
date_updated: 2026-07-02T05:44:24Z
day: '31'
doi: 10.1007/978-3-0348-0736-4
edition: '1'
extern: '1'
intvolume: ' 45'
language:
- iso: eng
month: '07'
oa_version: None
page: '312'
place: Basel
publication_identifier:
eisbn:
- '9783034807364'
eissn:
- 2296-5041
isbn:
- '9783034807357'
issn:
- 1661-237X
publication_status: published
publisher: Springer
quality_controlled: '1'
series_title: OWS
status: public
title: 'Dispersive Equations and Nonlinear Waves: Generalized Korteweg–de Vries, Nonlinear
Schrödinger, Wave and Schrödinger Maps'
type: book
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 45
year: '2014'
...
---
_id: '2905'
abstract:
- lang: eng
text: "Persistent homology is a recent grandchild of homology that has found use
in\r\nscience and engineering as well as in mathematics. This paper surveys the
method as well\r\nas the applications, neglecting completeness in favor of highlighting
ideas and directions."
acknowledgement: This research is partially supported by NSF under grant DBI-0820624,
by ESF under the Research Networking Programme, and by the Russian Government Project
11.G34.31.0053.
article_processing_charge: No
author:
- first_name: Herbert
full_name: Edelsbrunner, Herbert
id: 3FB178DA-F248-11E8-B48F-1D18A9856A87
last_name: Edelsbrunner
orcid: 0000-0002-9823-6833
- first_name: Dmitriy
full_name: Morozovy, Dmitriy
last_name: Morozovy
citation:
ama: 'Edelsbrunner H, Morozovy D. Persistent homology: Theory and practice. In:
EMS Press; 2014:31-50. doi:10.4171/120-1/3'
apa: 'Edelsbrunner, H., & Morozovy, D. (2014). Persistent homology: Theory and
practice (pp. 31–50). Presented at the ECM: European Congress of Mathematics,
Kraków, Poland: EMS Press. https://doi.org/10.4171/120-1/3'
chicago: 'Edelsbrunner, Herbert, and Dmitriy Morozovy. “Persistent Homology: Theory
and Practice,” 31–50. EMS Press, 2014. https://doi.org/10.4171/120-1/3.'
ieee: 'H. Edelsbrunner and D. Morozovy, “Persistent homology: Theory and practice,”
presented at the ECM: European Congress of Mathematics, Kraków, Poland, 2014,
pp. 31–50.'
ista: 'Edelsbrunner H, Morozovy D. 2014. Persistent homology: Theory and practice.
ECM: European Congress of Mathematics, 31–50.'
mla: 'Edelsbrunner, Herbert, and Dmitriy Morozovy. Persistent Homology: Theory
and Practice. EMS Press, 2014, pp. 31–50, doi:10.4171/120-1/3.'
short: H. Edelsbrunner, D. Morozovy, in:, EMS Press, 2014, pp. 31–50.
conference:
end_date: 2012-07-07
location: Kraków, Poland
name: 'ECM: European Congress of Mathematics'
start_date: 2012-07-02
corr_author: '1'
das_tickbox: '1'
date_created: 2018-12-11T12:00:16Z
date_published: 2014-01-01T00:00:00Z
date_updated: 2026-07-06T11:55:48Z
day: '01'
ddc:
- '000'
department:
- _id: HeEd
doi: 10.4171/120-1/3
file:
- access_level: open_access
checksum: 1d4a046f1af945c407c5c4d411d4c5e4
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:16:43Z
date_updated: 2020-07-14T12:45:52Z
file_id: '5232'
file_name: IST-2016-544-v1+1_2012-P-11-PHTheoryPractice.pdf
file_size: 435320
relation: main_file
file_date_updated: 2020-07-14T12:45:52Z
has_accepted_license: '1'
language:
- iso: eng
month: '01'
oa: 1
oa_version: Submitted Version
page: 31 - 50
publication_status: published
publisher: EMS Press
publist_id: '3842'
pubrep_id: '544'
quality_controlled: '1'
status: public
title: 'Persistent homology: Theory and practice'
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2014'
...
---
_id: '1904'
abstract:
- lang: eng
text: We prove a Strichartz inequality for a system of orthonormal functions, with
an optimal behavior of the constant in the limit of a large number of functions.
The estimate generalizes the usual Strichartz inequality, in the same fashion
as the Lieb-Thirring inequality generalizes the Sobolev inequality. As an application,
we consider the Schrödinger equation with a time-dependent potential and we show
the existence of the wave operator in Schatten spaces.
article_processing_charge: No
arxiv: 1
author:
- first_name: Rupert
full_name: Frank, Rupert
last_name: Frank
- first_name: Mathieu
full_name: Lewin, Mathieu
last_name: Lewin
- first_name: Élliott
full_name: Lieb, Élliott
last_name: Lieb
- first_name: Robert
full_name: Seiringer, Robert
id: 4AFD0470-F248-11E8-B48F-1D18A9856A87
last_name: Seiringer
orcid: 0000-0002-6781-0521
citation:
ama: Frank R, Lewin M, Lieb É, Seiringer R. Strichartz inequality for orthonormal
functions. Journal of the European Mathematical Society. 2014;16(7):1507-1526.
doi:10.4171/JEMS/467
apa: Frank, R., Lewin, M., Lieb, É., & Seiringer, R. (2014). Strichartz inequality
for orthonormal functions. Journal of the European Mathematical Society.
EMS Press. https://doi.org/10.4171/JEMS/467
chicago: Frank, Rupert, Mathieu Lewin, Élliott Lieb, and Robert Seiringer. “Strichartz
Inequality for Orthonormal Functions.” Journal of the European Mathematical
Society. EMS Press, 2014. https://doi.org/10.4171/JEMS/467.
ieee: R. Frank, M. Lewin, É. Lieb, and R. Seiringer, “Strichartz inequality for
orthonormal functions,” Journal of the European Mathematical Society, vol.
16, no. 7. EMS Press, pp. 1507–1526, 2014.
ista: Frank R, Lewin M, Lieb É, Seiringer R. 2014. Strichartz inequality for orthonormal
functions. Journal of the European Mathematical Society. 16(7), 1507–1526.
mla: Frank, Rupert, et al. “Strichartz Inequality for Orthonormal Functions.” Journal
of the European Mathematical Society, vol. 16, no. 7, EMS Press, 2014, pp.
1507–26, doi:10.4171/JEMS/467.
short: R. Frank, M. Lewin, É. Lieb, R. Seiringer, Journal of the European Mathematical
Society 16 (2014) 1507–1526.
das_tickbox: '1'
date_created: 2018-12-11T11:54:38Z
date_published: 2014-08-23T00:00:00Z
date_updated: 2026-07-06T11:56:08Z
day: '23'
department:
- _id: RoSe
doi: 10.4171/JEMS/467
external_id:
arxiv:
- '1306.1309'
isi:
- '000345494900006'
intvolume: ' 16'
isi: 1
issue: '7'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/1306.1309
month: '08'
oa: 1
oa_version: Submitted Version
page: 1507 - 1526
project:
- _id: 26450934-B435-11E9-9278-68D0E5697425
name: NSERC Postdoctoral fellowship
publication: Journal of the European Mathematical Society
publication_status: published
publisher: EMS Press
publist_id: '5191'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Strichartz inequality for orthonormal functions
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 16
year: '2014'
...
---
_id: '2233'
abstract:
- lang: eng
text: ' A discounted-sum automaton (NDA) is a nondeterministic finite automaton
with edge weights, valuing a run by the discounted sum of visited edge weights.
More precisely, the weight in the i-th position of the run is divided by λi, where
the discount factor λ is a fixed rational number greater than 1. The value of
a word is the minimal value of the automaton runs on it. Discounted summation
is a common and useful measuring scheme, especially for infinite sequences, reflecting
the assumption that earlier weights are more important than later weights. Unfortunately,
determinization of NDAs, which is often essential in formal verification, is,
in general, not possible. We provide positive news, showing that every NDA with
an integral discount factor is determinizable. We complete the picture by proving
that the integers characterize exactly the discount factors that guarantee determinizability:
for every nonintegral rational discount factor λ, there is a nondeterminizable
λ-NDA. We also prove that the class of NDAs with integral discount factors enjoys
closure under the algebraic operations min, max, addition, and subtraction, which
is not the case for general NDAs nor for deterministic NDAs. For general NDAs,
we look into approximate determinization, which is always possible as the influence
of a word''s suffix decays. We show that the naive approach, of unfolding the
automaton computations up to a sufficient level, is doubly exponential in the
discount factor. We provide an alternative construction for approximate determinization,
which is singly exponential in the discount factor, in the precision, and in the
number of states. We also prove matching lower bounds, showing that the exponential
dependency on each of these three parameters cannot be avoided. All our results
hold equally for automata over finite words and for automata over infinite words. '
article_processing_charge: No
author:
- first_name: Udi
full_name: Boker, Udi
last_name: Boker
- first_name: Thomas A
full_name: Henzinger, Thomas A
id: 40876CD8-F248-11E8-B48F-1D18A9856A87
last_name: Henzinger
orcid: 0000−0002−2985−7724
citation:
ama: Boker U, Henzinger TA. Exact and approximate determinization of discounted-sum
automata. Logical Methods in Computer Science. 2014;10(1). doi:10.2168/LMCS-10(1:10)2014
apa: Boker, U., & Henzinger, T. A. (2014). Exact and approximate determinization
of discounted-sum automata. Logical Methods in Computer Science. International
Federation for Computational Logic. https://doi.org/10.2168/LMCS-10(1:10)2014
chicago: Boker, Udi, and Thomas A Henzinger. “Exact and Approximate Determinization
of Discounted-Sum Automata.” Logical Methods in Computer Science. International
Federation for Computational Logic, 2014. https://doi.org/10.2168/LMCS-10(1:10)2014.
ieee: U. Boker and T. A. Henzinger, “Exact and approximate determinization of discounted-sum
automata,” Logical Methods in Computer Science, vol. 10, no. 1. International
Federation for Computational Logic, 2014.
ista: Boker U, Henzinger TA. 2014. Exact and approximate determinization of discounted-sum
automata. Logical Methods in Computer Science. 10(1).
mla: Boker, Udi, and Thomas A. Henzinger. “Exact and Approximate Determinization
of Discounted-Sum Automata.” Logical Methods in Computer Science, vol.
10, no. 1, International Federation for Computational Logic, 2014, doi:10.2168/LMCS-10(1:10)2014.
short: U. Boker, T.A. Henzinger, Logical Methods in Computer Science 10 (2014).
das_tickbox: '1'
date_created: 2018-12-11T11:56:28Z
date_published: 2014-02-13T00:00:00Z
date_updated: 2026-07-06T13:22:33Z
day: '13'
ddc:
- '000'
department:
- _id: ToHe
doi: 10.2168/LMCS-10(1:10)2014
ec_funded: 1
external_id:
isi:
- '000333744700015'
file:
- access_level: open_access
checksum: 9f6ea2e2d8d4a32ff0becc29d835bbf8
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:07:45Z
date_updated: 2020-07-14T12:45:34Z
file_id: '4643'
file_name: IST-2015-389-v1+1_1401.3957.pdf
file_size: 550936
relation: main_file
file_date_updated: 2020-07-14T12:45:34Z
has_accepted_license: '1'
intvolume: ' 10'
isi: 1
issue: '1'
language:
- iso: eng
month: '02'
oa: 1
oa_version: Published Version
project:
- _id: 25832EC2-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: S 11407_N23
name: Rigorous Systems Engineering
- _id: 25EE3708-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '267989'
name: Quantitative Reactive Modeling
publication: Logical Methods in Computer Science
publication_identifier:
issn:
- 1860-5974
publication_status: published
publisher: International Federation for Computational Logic
publist_id: '4728'
pubrep_id: '389'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Exact and approximate determinization of discounted-sum automata
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: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 10
year: '2014'
...
---
_id: '2234'
abstract:
- lang: eng
text: We study Markov decision processes (MDPs) with multiple limit-average (or
mean-payoff) functions. We consider two different objectives, namely, expectation
and satisfaction objectives. Given an MDP with κ limit-average functions, in the
expectation objective the goal is to maximize the expected limit-average value,
and in the satisfaction objective the goal is to maximize the probability of runs
such that the limit-average value stays above a given vector. We show that under
the expectation objective, in contrast to the case of one limit-average function,
both randomization and memory are necessary for strategies even for ε-approximation,
and that finite-memory randomized strategies are sufficient for achieving Pareto
optimal values. Under the satisfaction objective, in contrast to the case of one
limit-average function, infinite memory is necessary for strategies achieving
a specific value (i.e. randomized finite-memory strategies are not sufficient),
whereas memoryless randomized strategies are sufficient for ε-approximation, for
all ε > 0. We further prove that the decision problems for both expectation
and satisfaction objectives can be solved in polynomial time and the trade-off
curve (Pareto curve) can be ε-approximated in time polynomial in the size of the
MDP and 1/ε, and exponential in the number of limit-average functions, for all
ε > 0. Our analysis also reveals flaws in previous work for MDPs with multiple
mean-payoff functions under the expectation objective, corrects the flaws, and
allows us to obtain improved results.
article_processing_charge: No
author:
- first_name: Tomáš
full_name: Brázdil, Tomáš
last_name: Brázdil
- first_name: Václav
full_name: Brožek, Václav
last_name: Brožek
- first_name: Krishnendu
full_name: Chatterjee, Krishnendu
id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
last_name: Chatterjee
orcid: 0000-0002-4561-241X
- first_name: Vojtěch
full_name: Forejt, Vojtěch
last_name: Forejt
- first_name: Antonín
full_name: Kučera, Antonín
last_name: Kučera
citation:
ama: Brázdil T, Brožek V, Chatterjee K, Forejt V, Kučera A. Markov decision processes
with multiple long-run average objectives. Logical Methods in Computer Science.
2014;10(1). doi:10.2168/LMCS-10(1:13)2014
apa: Brázdil, T., Brožek, V., Chatterjee, K., Forejt, V., & Kučera, A. (2014).
Markov decision processes with multiple long-run average objectives. Logical
Methods in Computer Science. International Federation for Computational Logic.
https://doi.org/10.2168/LMCS-10(1:13)2014
chicago: Brázdil, Tomáš, Václav Brožek, Krishnendu Chatterjee, Vojtěch Forejt, and
Antonín Kučera. “Markov Decision Processes with Multiple Long-Run Average Objectives.”
Logical Methods in Computer Science. International Federation for Computational
Logic, 2014. https://doi.org/10.2168/LMCS-10(1:13)2014.
ieee: T. Brázdil, V. Brožek, K. Chatterjee, V. Forejt, and A. Kučera, “Markov decision
processes with multiple long-run average objectives,” Logical Methods in Computer
Science, vol. 10, no. 1. International Federation for Computational Logic,
2014.
ista: Brázdil T, Brožek V, Chatterjee K, Forejt V, Kučera A. 2014. Markov decision
processes with multiple long-run average objectives. Logical Methods in Computer
Science. 10(1).
mla: Brázdil, Tomáš, et al. “Markov Decision Processes with Multiple Long-Run Average
Objectives.” Logical Methods in Computer Science, vol. 10, no. 1, International
Federation for Computational Logic, 2014, doi:10.2168/LMCS-10(1:13)2014.
short: T. Brázdil, V. Brožek, K. Chatterjee, V. Forejt, A. Kučera, Logical Methods
in Computer Science 10 (2014).
das_tickbox: '1'
date_created: 2018-12-11T11:56:29Z
date_published: 2014-02-14T00:00:00Z
date_updated: 2026-07-06T13:23:35Z
day: '14'
ddc:
- '000'
department:
- _id: KrCh
doi: 10.2168/LMCS-10(1:13)2014
ec_funded: 1
external_id:
isi:
- '000333744700001'
file:
- access_level: open_access
checksum: 803edcc2d8c1acfba44a9ec43a5eb9f0
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:07:57Z
date_updated: 2020-07-14T12:45:34Z
file_id: '4656'
file_name: IST-2016-428-v1+1_1104.3489.pdf
file_size: 375388
relation: main_file
file_date_updated: 2020-07-14T12:45:34Z
has_accepted_license: '1'
intvolume: ' 10'
isi: 1
issue: '1'
language:
- iso: eng
month: '02'
oa: 1
oa_version: Published Version
project:
- _id: 2584A770-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P 23499-N23
name: Modern Graph Algorithmic Techniques in Formal Verification
- _id: 25863FF4-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: S11407
name: Game Theory
- _id: 2581B60A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '279307'
name: 'Quantitative Graph Games: Theory and Applications'
- _id: 2587B514-B435-11E9-9278-68D0E5697425
name: Microsoft Research Faculty Fellowship
publication: Logical Methods in Computer Science
publication_identifier:
issn:
- 1860-5974
publication_status: published
publisher: International Federation for Computational Logic
publist_id: '4727'
pubrep_id: '428'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Markov decision processes with multiple long-run average objectives
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: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 10
year: '2014'
...
---
_id: '2265'
abstract:
- lang: eng
text: Coordinated migration of newly-born neurons to their target territories is
essential for correct neuronal circuit assembly in the developing brain. Although
a cohort of signaling pathways has been implicated in the regulation of cortical
projection neuron migration, the precise molecular mechanisms and how a balanced
interplay of cell-autonomous and non-autonomous functions of candidate signaling
molecules controls the discrete steps in the migration process, are just being
revealed. In this chapter, I will focally review recent advances that improved
our understanding of the cell-autonomous and possible cell-nonautonomous functions
of the evolutionarily conserved LIS1/NDEL1-complex in regulating the sequential
steps of cortical projection neuron migration. I will then elaborate on the emerging
concept that the Reelin signaling pathway, acts exactly at precise stages in the
course of cortical projection neuron migration. Lastly, I will discuss how finely
tuned transcriptional programs and downstream effectors govern particular aspects
in driving radial migration at discrete stages and how they regulate the precise
positioning of cortical projection neurons in the developing cerebral cortex.
alternative_title:
- Advances in Experimental Medicine and Biology
article_processing_charge: No
author:
- first_name: Simon
full_name: Hippenmeyer, Simon
id: 37B36620-F248-11E8-B48F-1D18A9856A87
last_name: Hippenmeyer
orcid: 0000-0003-2279-1061
citation:
ama: 'Hippenmeyer S. Molecular pathways controlling the sequential steps of cortical
projection neuron migration. In: Nguyen L, ed. Cellular and Molecular Control
of Neuronal Migration. Vol 800. Springer; 2014:1-24. doi:10.1007/978-94-007-7687-6_1'
apa: Hippenmeyer, S. (2014). Molecular pathways controlling the sequential steps
of cortical projection neuron migration. In L. Nguyen (Ed.), Cellular and Molecular
Control of Neuronal Migration (Vol. 800, pp. 1–24). Springer. https://doi.org/10.1007/978-94-007-7687-6_1
chicago: Hippenmeyer, Simon. “Molecular Pathways Controlling the Sequential Steps
of Cortical Projection Neuron Migration.” In Cellular and Molecular Control
of Neuronal Migration, edited by Laurent Nguyen, 800:1–24. Springer, 2014.
https://doi.org/10.1007/978-94-007-7687-6_1.
ieee: S. Hippenmeyer, “Molecular pathways controlling the sequential steps of cortical
projection neuron migration,” in Cellular and Molecular Control of Neuronal
Migration, vol. 800, L. Nguyen, Ed. Springer, 2014, pp. 1–24.
ista: 'Hippenmeyer S. 2014.Molecular pathways controlling the sequential steps of
cortical projection neuron migration. In: Cellular and Molecular Control of Neuronal
Migration. Advances in Experimental Medicine and Biology, vol. 800, 1–24.'
mla: Hippenmeyer, Simon. “Molecular Pathways Controlling the Sequential Steps of
Cortical Projection Neuron Migration.” Cellular and Molecular Control of Neuronal
Migration, edited by Laurent Nguyen, vol. 800, Springer, 2014, pp. 1–24, doi:10.1007/978-94-007-7687-6_1.
short: S. Hippenmeyer, in:, L. Nguyen (Ed.), Cellular and Molecular Control of Neuronal
Migration, Springer, 2014, pp. 1–24.
corr_author: '1'
das_tickbox: '1'
date_created: 2018-12-11T11:56:39Z
date_published: 2014-01-01T00:00:00Z
date_updated: 2026-07-07T13:04:40Z
day: '01'
department:
- _id: SiHi
doi: 10.1007/978-94-007-7687-6_1
editor:
- first_name: Laurent
full_name: Nguyen, Laurent
last_name: Nguyen
external_id:
isi:
- '000333646000002'
intvolume: ' 800'
isi: 1
language:
- iso: eng
month: '01'
oa_version: None
page: 1 - 24
publication: Cellular and Molecular Control of Neuronal Migration
publication_status: published
publisher: Springer
publist_id: '4679'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Molecular pathways controlling the sequential steps of cortical projection
neuron migration
type: book_chapter
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 800
year: '2014'
...
---
_id: '2027'
abstract:
- lang: eng
text: We present a general framework for applying machine-learning algorithms to
the verification of Markov decision processes (MDPs). The primary goal of these
techniques is to improve performance by avoiding an exhaustive exploration of
the state space. Our framework focuses on probabilistic reachability, which is
a core property for verification, and is illustrated through two distinct instantiations.
The first assumes that full knowledge of the MDP is available, and performs a
heuristic-driven partial exploration of the model, yielding precise lower and
upper bounds on the required probability. The second tackles the case where we
may only sample the MDP, and yields probabilistic guarantees, again in terms of
both the lower and upper bounds, which provides efficient stopping criteria for
the approximation. The latter is the first extension of statistical model checking
for unbounded properties inMDPs. In contrast with other related techniques, our
approach is not restricted to time-bounded (finite-horizon) or discounted properties,
nor does it assume any particular properties of the MDP. We also show how our
methods extend to LTL objectives. We present experimental results showing the
performance of our framework on several examples.
acknowledgement: This research was funded in part by the European Research Council
(ERC) under grant agreement 246967 (VERIWARE), by the EU FP7 project HIERATIC, by
the Czech Science Foundation grant No P202/12/P612, by EPSRC project EP/K038575/1.
alternative_title:
- LNCS
article_processing_charge: No
arxiv: 1
author:
- first_name: Tomáš
full_name: Brázdil, Tomáš
last_name: Brázdil
- first_name: Krishnendu
full_name: Chatterjee, Krishnendu
id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87
last_name: Chatterjee
orcid: 0000-0002-4561-241X
- first_name: Martin
full_name: Chmelik, Martin
id: 3624234E-F248-11E8-B48F-1D18A9856A87
last_name: Chmelik
- first_name: Vojtěch
full_name: Forejt, Vojtěch
last_name: Forejt
- first_name: Jan
full_name: Kretinsky, Jan
id: 44CEF464-F248-11E8-B48F-1D18A9856A87
last_name: Kretinsky
orcid: 0000-0002-8122-2881
- first_name: Marta
full_name: Kwiatkowska, Marta
last_name: Kwiatkowska
- first_name: David
full_name: Parker, David
last_name: Parker
- first_name: Mateusz
full_name: Ujma, Mateusz
last_name: Ujma
citation:
ama: 'Brázdil T, Chatterjee K, Chmelik M, et al. Verification of Markov decision
processes using learning algorithms. In: 12th International Symposium on Automated
Technology for Verification and Analysis. Vol 8837. Springer; 2014:98-114.
doi:10.1007/978-3-319-11936-6_8'
apa: 'Brázdil, T., Chatterjee, K., Chmelik, M., Forejt, V., Kretinsky, J., Kwiatkowska,
M., … Ujma, M. (2014). Verification of Markov decision processes using learning
algorithms. In 12th International Symposium on Automated Technology for Verification
and Analysis (Vol. 8837, pp. 98–114). Sydney, Australia: Springer. https://doi.org/10.1007/978-3-319-11936-6_8'
chicago: Brázdil, Tomáš, Krishnendu Chatterjee, Martin Chmelik, Vojtěch Forejt,
Jan Kretinsky, Marta Kwiatkowska, David Parker, and Mateusz Ujma. “Verification
of Markov Decision Processes Using Learning Algorithms.” In 12th International
Symposium on Automated Technology for Verification and Analysis, 8837:98–114.
Springer, 2014. https://doi.org/10.1007/978-3-319-11936-6_8.
ieee: T. Brázdil et al., “Verification of Markov decision processes using
learning algorithms,” in 12th International Symposium on Automated Technology
for Verification and Analysis, Sydney, Australia, 2014, vol. 8837, pp. 98–114.
ista: 'Brázdil T, Chatterjee K, Chmelik M, Forejt V, Kretinsky J, Kwiatkowska M,
Parker D, Ujma M. 2014. Verification of Markov decision processes using learning
algorithms. 12th International Symposium on Automated Technology for Verification
and Analysis. ATVA: Automated Technology for Verification and Analysis, LNCS,
vol. 8837, 98–114.'
mla: Brázdil, Tomáš, et al. “Verification of Markov Decision Processes Using Learning
Algorithms.” 12th International Symposium on Automated Technology for Verification
and Analysis, vol. 8837, Springer, 2014, pp. 98–114, doi:10.1007/978-3-319-11936-6_8.
short: T. Brázdil, K. Chatterjee, M. Chmelik, V. Forejt, J. Kretinsky, M. Kwiatkowska,
D. Parker, M. Ujma, in:, 12th International Symposium on Automated Technology
for Verification and Analysis, Springer, 2014, pp. 98–114.
conference:
end_date: 2014-11-07
location: Sydney, Australia
name: 'ATVA: Automated Technology for Verification and Analysis'
start_date: 2014-11-03
das_tickbox: '1'
date_created: 2018-12-11T11:55:17Z
date_published: 2014-11-01T00:00:00Z
date_updated: 2026-07-07T13:15:34Z
day: '01'
department:
- _id: KrCh
- _id: ToHe
doi: 10.1007/978-3-319-11936-6_8
ec_funded: 1
external_id:
arxiv:
- '1402.2967'
intvolume: ' 8837'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://arxiv.org/abs/1402.2967
month: '11'
oa: 1
oa_version: Submitted Version
page: 98 - 114
project:
- _id: 25EE3708-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '267989'
name: Quantitative Reactive Modeling
- _id: 26241A12-B435-11E9-9278-68D0E5697425
grant_number: '24696'
name: Light-regulated ligand traps for spatio-temporal inhibition of cell signaling
- _id: 2581B60A-B435-11E9-9278-68D0E5697425
call_identifier: FP7
grant_number: '279307'
name: 'Quantitative Graph Games: Theory and Applications'
- _id: 25F5A88A-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: S11402-N23
name: Moderne Concurrency Paradigms
- _id: 25863FF4-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: S11407
name: Game Theory
- _id: 2584A770-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P 23499-N23
name: Modern Graph Algorithmic Techniques in Formal Verification
- _id: 2587B514-B435-11E9-9278-68D0E5697425
name: Microsoft Research Faculty Fellowship
publication: 12th International Symposium on Automated Technology for Verification
and Analysis
publication_status: published
publisher: Springer
publist_id: '5046'
quality_controlled: '1'
scopus_import: '1'
status: public
title: Verification of Markov decision processes using learning algorithms
type: conference
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 8837
year: '2014'
...