---
_id: '3304'
abstract:
- lang: eng
text: Complex traits often involve interactions between different genetic loci.
This can lead to sign epistasis, whereby mutations that are individually deleterious
or neutral combine to confer a fitness benefit. In order to acquire the beneficial
genotype, an asexual population must cross a fitness valley or plateau by first
acquiring the deleterious or neutral intermediates. Here, we present a complete,
intuitive theoretical description of the valley-crossing process across the full
spectrum of possible parameter regimes. We calculate the rate at which a population
crosses a fitness valley or plateau of arbitrary width, as a function of the mutation
rates, the population size, and the fitnesses of the intermediates. We find that
when intermediates are close to neutral, a large population can cross even wide
fitness valleys remarkably quickly, so that valley-crossing dynamics may be common
even when mutations that directly increase fitness are also possible. Thus the
evolutionary dynamics of large populations can be sensitive to the structure of
an extended region of the fitness landscape — the population may not take directly
uphill paths in favor of paths across valleys and plateaus that lead eventually
to fitter genotypes. In smaller populations, we find that below a threshold size,
which depends on the width of the fitness valley and the strength of selection
against intermediate genotypes, valley-crossing is much less likely and hence
the evolutionary dynamics are less influenced by distant regions of the fitness
landscape.
author:
- first_name: Daniel
full_name: Daniel Weissman
id: 2D0CE020-F248-11E8-B48F-1D18A9856A87
last_name: Weissman
- first_name: Michael
full_name: Desai, Michael M
last_name: Desai
- first_name: Daniel
full_name: Fisher, Daniel S
last_name: Fisher
- first_name: Marcus
full_name: Feldman, Marcus W
last_name: Feldman
citation:
ama: Weissman D, Desai M, Fisher D, Feldman M. The rate at which asexual populations
cross fitness valleys. Theoretical Population Biology. 2009;75(4):286-300.
doi:10.1016/j.tpb.2009.02.006
apa: Weissman, D., Desai, M., Fisher, D., & Feldman, M. (2009). The rate at
which asexual populations cross fitness valleys. Theoretical Population Biology.
Academic Press. https://doi.org/10.1016/j.tpb.2009.02.006
chicago: Weissman, Daniel, Michael Desai, Daniel Fisher, and Marcus Feldman. “The
Rate at Which Asexual Populations Cross Fitness Valleys.” Theoretical Population
Biology. Academic Press, 2009. https://doi.org/10.1016/j.tpb.2009.02.006.
ieee: D. Weissman, M. Desai, D. Fisher, and M. Feldman, “The rate at which asexual
populations cross fitness valleys,” Theoretical Population Biology, vol.
75, no. 4. Academic Press, pp. 286–300, 2009.
ista: Weissman D, Desai M, Fisher D, Feldman M. 2009. The rate at which asexual
populations cross fitness valleys. Theoretical Population Biology. 75(4), 286–300.
mla: Weissman, Daniel, et al. “The Rate at Which Asexual Populations Cross Fitness
Valleys.” Theoretical Population Biology, vol. 75, no. 4, Academic Press,
2009, pp. 286–300, doi:10.1016/j.tpb.2009.02.006.
short: D. Weissman, M. Desai, D. Fisher, M. Feldman, Theoretical Population Biology
75 (2009) 286–300.
date_created: 2018-12-11T12:02:34Z
date_published: 2009-06-01T00:00:00Z
date_updated: 2021-01-12T07:42:31Z
day: '01'
doi: 10.1016/j.tpb.2009.02.006
extern: 1
intvolume: ' 75'
issue: '4'
month: '06'
page: 286 - 300
publication: Theoretical Population Biology
publication_status: published
publisher: Academic Press
publist_id: '3336'
quality_controlled: 0
status: public
title: The rate at which asexual populations cross fitness valleys
type: journal_article
volume: 75
year: '2009'
...
---
_id: '3309'
abstract:
- lang: eng
text: |2-
Mastitis, a worldwide endemic disease of dairy cows, is an important cause of decreased efficiency in milk production. Early medical treatment can reduce the nonreversible losses in milk production caused by this infection. Various diagnostic tests for mastitis are available, including a test measuring the electrical conductivity of milk (MEC test), the industry standard of somatic cell counting (SCC test), a bacteriological test, and a recently developed test measuring mammary associated amyloid A (MAA test). None of these tests is considered a gold standard, however. The aim of the present study was to determine which of these tests provides the best results, and at what cost, to improve the efficiency of milk production. For this study, 25 cows were tested at all four quarters of the udder with each of the aforementioned mastitis diagnostic tests. Based on the data, the disease prevalence as well as the sensitivity and the specificity of the four tests were estimated with a Bayesian approach by extending the Hui and Walter model with two independent tests and two populations to a model with four partially dependent tests and one population. This model was further combined with a receiver operating characteristics analysis to estimate the overall test accuracy.
author:
- first_name: Caroline
full_name: Caroline Uhler
id: 49ADD78E-F248-11E8-B48F-1D18A9856A87
last_name: Uhler
orcid: 0000-0002-7008-0216
citation:
ama: 'Uhler C. Mastitis in dairy production: Estimation of sensitivity, specificity
and disease prevalence in the absence of a gold standard. Journal of Agricultural
Biological and Environmental Statistics. 2009;14(1):79-98. doi:10.1198/jabes.2009.0005'
apa: 'Uhler, C. (2009). Mastitis in dairy production: Estimation of sensitivity,
specificity and disease prevalence in the absence of a gold standard. Journal
of Agricultural Biological and Environmental Statistics. Springer. https://doi.org/10.1198/jabes.2009.0005'
chicago: 'Uhler, Caroline. “Mastitis in Dairy Production: Estimation of Sensitivity,
Specificity and Disease Prevalence in the Absence of a Gold Standard.” Journal
of Agricultural Biological and Environmental Statistics. Springer, 2009. https://doi.org/10.1198/jabes.2009.0005.'
ieee: 'C. Uhler, “Mastitis in dairy production: Estimation of sensitivity, specificity
and disease prevalence in the absence of a gold standard,” Journal of Agricultural
Biological and Environmental Statistics, vol. 14, no. 1. Springer, pp. 79–98,
2009.'
ista: 'Uhler C. 2009. Mastitis in dairy production: Estimation of sensitivity, specificity
and disease prevalence in the absence of a gold standard. Journal of Agricultural
Biological and Environmental Statistics. 14(1), 79–98.'
mla: 'Uhler, Caroline. “Mastitis in Dairy Production: Estimation of Sensitivity,
Specificity and Disease Prevalence in the Absence of a Gold Standard.” Journal
of Agricultural Biological and Environmental Statistics, vol. 14, no. 1, Springer,
2009, pp. 79–98, doi:10.1198/jabes.2009.0005.'
short: C. Uhler, Journal of Agricultural Biological and Environmental Statistics
14 (2009) 79–98.
date_created: 2018-12-11T12:02:35Z
date_published: 2009-03-01T00:00:00Z
date_updated: 2021-01-12T07:42:33Z
day: '01'
doi: 10.1198/jabes.2009.0005
extern: 1
intvolume: ' 14'
issue: '1'
month: '03'
page: 79 - 98
publication: Journal of Agricultural Biological and Environmental Statistics
publication_status: published
publisher: Springer
publist_id: '3331'
quality_controlled: 0
status: public
title: 'Mastitis in dairy production: Estimation of sensitivity, specificity and disease
prevalence in the absence of a gold standard'
type: journal_article
volume: 14
year: '2009'
...
---
_id: '337'
abstract:
- lang: eng
text: 'The formation of hollow vs solid particles by means of the oxidation reaction
of solid metal particles depends on the differential self-diffusivities of the
reactants through the composite shell, the reaction probabilities at each interface,
and the concentration and diffusivity of the element in solution. By means of
a kinetic model of the oxidation process, we determine the phase diagrams for
the geometry of the oxidized particles and propose four shell growth regimes.
We experimentally illustrate the different growth scenarios by changing the conditions
of oxidation of cadmium spherical crystals using different chalcogen precursors. '
article_processing_charge: No
article_type: original
author:
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
- first_name: Maria
full_name: Ibáñez, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibáñez
orcid: 0000-0001-5013-2843
- first_name: Pablo
full_name: Guardia, Pablo
last_name: Guardia
- first_name: Paul
full_name: Alivisatos, Paul
last_name: Alivisatos
citation:
ama: Cabot A, Ibáñez M, Guardia P, Alivisatos P. Reaction regimes on the synthesis
of hollow particles by the Kirkendall effect. Journal of the American Chemical
Society. 2009;131(32):11326-11328. doi:10.1021/ja903751p
apa: Cabot, A., Ibáñez, M., Guardia, P., & Alivisatos, P. (2009). Reaction regimes
on the synthesis of hollow particles by the Kirkendall effect. Journal of the
American Chemical Society. ACS. https://doi.org/10.1021/ja903751p
chicago: Cabot, Andreu, Maria Ibáñez, Pablo Guardia, and Paul Alivisatos. “Reaction
Regimes on the Synthesis of Hollow Particles by the Kirkendall Effect.” Journal
of the American Chemical Society. ACS, 2009. https://doi.org/10.1021/ja903751p.
ieee: A. Cabot, M. Ibáñez, P. Guardia, and P. Alivisatos, “Reaction regimes on the
synthesis of hollow particles by the Kirkendall effect,” Journal of the American
Chemical Society, vol. 131, no. 32. ACS, pp. 11326–11328, 2009.
ista: Cabot A, Ibáñez M, Guardia P, Alivisatos P. 2009. Reaction regimes on the
synthesis of hollow particles by the Kirkendall effect. Journal of the American
Chemical Society. 131(32), 11326–11328.
mla: Cabot, Andreu, et al. “Reaction Regimes on the Synthesis of Hollow Particles
by the Kirkendall Effect.” Journal of the American Chemical Society, vol.
131, no. 32, ACS, 2009, pp. 11326–28, doi:10.1021/ja903751p.
short: A. Cabot, M. Ibáñez, P. Guardia, P. Alivisatos, Journal of the American Chemical
Society 131 (2009) 11326–11328.
date_created: 2018-12-11T11:45:53Z
date_published: 2009-01-01T00:00:00Z
date_updated: 2021-01-12T07:43:00Z
day: '01'
doi: 10.1021/ja903751p
extern: '1'
intvolume: ' 131'
issue: '32'
language:
- iso: eng
month: '01'
oa_version: None
page: 11326 - 11328
publication: Journal of the American Chemical Society
publication_status: published
publisher: ACS
publist_id: '7494'
quality_controlled: '1'
status: public
title: Reaction regimes on the synthesis of hollow particles by the Kirkendall effect
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 131
year: '2009'
...
---
_id: '3398'
abstract:
- lang: eng
text: Why is a particular architecture for a pathway chosen over seemingly equivalent
alternatives? Çağatay et al. (2009) use a synthetic biology approach to show that
fluctuations—or noise—in protein levels may play a key role in determining which
network design is selected during evolution.
article_processing_charge: No
author:
- first_name: Tobias
full_name: Bollenbach, Tobias
id: 3E6DB97A-F248-11E8-B48F-1D18A9856A87
last_name: Bollenbach
orcid: 0000-0003-4398-476X
- first_name: Roy
full_name: Kishony, Roy
last_name: Kishony
citation:
ama: Bollenbach MT, Kishony R. Quiet gene circuit more fragile than its noisy peer.
Cell. 2009;139(3):460-461. doi:10.1016/j.cell.2009.10.005
apa: Bollenbach, M. T., & Kishony, R. (2009). Quiet gene circuit more fragile
than its noisy peer. Cell. Cell Press. https://doi.org/10.1016/j.cell.2009.10.005
chicago: Bollenbach, Mark Tobias, and Roy Kishony. “Quiet Gene Circuit More Fragile
than Its Noisy Peer.” Cell. Cell Press, 2009. https://doi.org/10.1016/j.cell.2009.10.005.
ieee: M. T. Bollenbach and R. Kishony, “Quiet gene circuit more fragile than its
noisy peer,” Cell, vol. 139, no. 3. Cell Press, pp. 460–461, 2009.
ista: Bollenbach MT, Kishony R. 2009. Quiet gene circuit more fragile than its noisy
peer. Cell. 139(3), 460–461.
mla: Bollenbach, Mark Tobias, and Roy Kishony. “Quiet Gene Circuit More Fragile
than Its Noisy Peer.” Cell, vol. 139, no. 3, Cell Press, 2009, pp. 460–61,
doi:10.1016/j.cell.2009.10.005.
short: M.T. Bollenbach, R. Kishony, Cell 139 (2009) 460–461.
date_created: 2018-12-11T12:03:07Z
date_published: 2009-10-30T00:00:00Z
date_updated: 2021-01-12T07:43:12Z
day: '30'
doi: 10.1016/j.cell.2009.10.005
extern: '1'
intvolume: ' 139'
issue: '3'
language:
- iso: eng
month: '10'
oa_version: None
page: 460 - 461
publication: Cell
publication_status: published
publisher: Cell Press
publist_id: '3061'
status: public
title: Quiet gene circuit more fragile than its noisy peer
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 139
year: '2009'
...
---
_id: '3400'
abstract:
- lang: eng
text: |-
Invasive fungal infections pose a serious threat to immunocompromised people. Most of these infections are caused by either Candida or Aspergillus species, with A. fumigatus being the predominant causative agent of Invasive Aspergillosis. Affected people comprise mainly haematopoietic stem cell or solid organ transplant patients who receive either high-dose corticosteroids or immunosuppressants. These risk factors predispose to the development of Invasive
Aspergillosis which is lethal in 20 to 80 % of the cases, largely due to insufficient efficacy of current antifungal therapy. Thus one major aim in current mycological research is the identification of new drug targets.
The polysaccharide-based fungal cell wall is both essential to fungi and absent from human cells which makes it appear an attractive new target. Notably, many components of the A. fumigatus cell wall, including the polysaccharide galactomannan, glycoproteins, and glycolipids, contain the unusual sugar galactofuranose (Galf). In contrast to the other cell wall monosaccharides, Galf does not occur on human cells but is known as component of cell surface molecules of many pathogenic bacteria and protozoa, such as Mycobacterium tuberculosis or Leishmania major. These molecules are often essential for virulence or viability of these organisms which suggested a possible role of Galf in the pathogenicity of A. fumigatus.
To address the importance of Galf in A. fumigatus, the key biosynthesis gene glfA, encoding UDPgalactopyranose mutase (UGM), was deleted. In different experimental approaches it was demonstrated that the absence of the glfA gene led to a complete loss of Galf-containing glycans.
Analysis of the DeltaglfA phenotype revealed growth and sporulation defects, reduced thermotolerance and an increased susceptibility to antifungal drugs. Electron Microscopy indicated a cell wall defect as a likely cause for the observed impairments. Furthermore, the virulence of the DeltaglfA mutant was found to be severely attenuated in a murine model of Invasive Aspergillosis.
The second focus of this study was laid on further elucidation of the galactofuranosylation pathway in A. fumigatus. In eukaryotes, a UDP-Galf transporter is likely required to transport UDP-Galf from the
cytosol into the organelles of the secretory pathway, but no such activity had been described. Sixteen candidate genes were identified in the A. fumigatus genome of which one, glfB, was found in close proximity to the glfA gene. In vitro transport assays revealed specificity of GlfB for UDP-Galf suggesting that glfB encoded indeed a UDP-Galf transporter. The influence of glfB on
galactofuranosylation was determined by a DeltaglfB deletion mutant, which closely recapitulated the DeltaglfA phenotype and was likewise found to be completely devoid of Galf. It could be concluded that all galactofuranosylation processes in A. fumigatus occur in the secretory pathway, including the biosynthesis of the cell wall polysaccharide galactomannan whose subcellular origin was previously disputed.
Thus in the course of this study the first UDP-Galf specific nucleotide sugar transporter was identified and its requirement for galactofuranosylation in A. fumigatus demonstrated. Moreover, it was shown that blocking the galactofuranosylation pathway impaired virulence of A. fumigatus which suggests the UDP-Galf biosynthesis enzyme UGM as a target for new antifungal drugs.
author:
- first_name: Philipp S
full_name: Philipp Schmalhorst
id: 309D50DA-F248-11E8-B48F-1D18A9856A87
last_name: Schmalhorst
orcid: 0000-0002-5795-0133
citation:
ama: Schmalhorst PS. Biosynthesis of Galactofuranose Containing Glycans and Their
Relevance for the Pathogenic Fungus Aspergillus fumigatus. 2009:1-72.
apa: Schmalhorst, P. S. (2009). Biosynthesis of Galactofuranose Containing Glycans
and Their Relevance for the Pathogenic Fungus Aspergillus fumigatus. Gottfried
Wilhelm Leibniz Universität Hannover.
chicago: Schmalhorst, Philipp S. “Biosynthesis of Galactofuranose Containing Glycans
and Their Relevance for the Pathogenic Fungus Aspergillus Fumigatus.” Gottfried
Wilhelm Leibniz Universität Hannover, 2009.
ieee: P. S. Schmalhorst, “Biosynthesis of Galactofuranose Containing Glycans and
Their Relevance for the Pathogenic Fungus Aspergillus fumigatus,” Gottfried Wilhelm
Leibniz Universität Hannover, 2009.
ista: Schmalhorst PS. 2009. Biosynthesis of Galactofuranose Containing Glycans and
Their Relevance for the Pathogenic Fungus Aspergillus fumigatus. Gottfried Wilhelm
Leibniz Universität Hannover.
mla: Schmalhorst, Philipp S. Biosynthesis of Galactofuranose Containing Glycans
and Their Relevance for the Pathogenic Fungus Aspergillus Fumigatus. Gottfried
Wilhelm Leibniz Universität Hannover, 2009, pp. 1–72.
short: P.S. Schmalhorst, Biosynthesis of Galactofuranose Containing Glycans and
Their Relevance for the Pathogenic Fungus Aspergillus Fumigatus, Gottfried Wilhelm
Leibniz Universität Hannover, 2009.
date_created: 2018-12-11T12:03:07Z
date_published: 2009-08-13T00:00:00Z
date_updated: 2021-01-12T07:43:13Z
day: '13'
extern: 1
main_file_link:
- open_access: '0'
url: http://edok01.tib.uni-hannover.de/edoks/e01dh09/609861891.pdf
month: '08'
page: 1 - 72
publication_status: published
publisher: Gottfried Wilhelm Leibniz Universität Hannover
publist_id: '3058'
quality_controlled: 0
status: public
title: Biosynthesis of Galactofuranose Containing Glycans and Their Relevance for
the Pathogenic Fungus Aspergillus fumigatus
type: dissertation
year: '2009'
...
---
_id: '3408'
abstract:
- lang: eng
text: Mechanical forces govern physiological processes in all living organisms.
Many cellular forces, for example, those generated in cyclic conformational changes
of biological machines, have repetitive components. In apparent contrast, little
is known about how dynamic protein structures respond to periodic mechanical information.
Ubiquitin is a small protein found in all eukaryotes. We developed molecular dynamics
simulations to unfold single and multimeric ubiquitins with periodic forces. By
using a coarse-grained representation, we were able to model forces with periods
about 2 orders of magnitude longer than the protein's relaxation time. We found
that even a moderate periodic force weakened the protein and shifted its unfolding
pathways in a frequency- and amplitude-dependent manner. A complex dynamic response
with secondary structure refolding and an increasing importance of local interactions
was revealed. Importantly, repetitive forces with broadly distributed frequencies
elicited very similar molecular responses compared to fixed-frequency forces.
When testing the influence of pulling geometry on ubiquitin's mechanical stability,
it was found that the linkage involved in the mechanical degradation of cellular
proteins renders the protein remarkably insensitive to periodic forces. We also
devised a complementary kinetic energy landscape model that traces these observations
and explains periodic-force, single-molecule measurements. In turn, this analytical
model is capable of predicting dynamic protein responses. These results provide
new insights into ubiquitin mechanics and a potential mechanical role during protein
degradation, as well as first frameworks for dynamic protein stability and the
modeling of repetitive mechanical processes.
author:
- first_name: Piotr
full_name: Szymczak, Piotr
last_name: Szymczak
- first_name: Harald L
full_name: Harald Janovjak
id: 33BA6C30-F248-11E8-B48F-1D18A9856A87
last_name: Janovjak
orcid: 0000-0002-8023-9315
citation:
ama: Szymczak P, Janovjak HL. Periodic forces trigger a complex mechanical response
in ubiquitin. Journal of Molecular Biology. 2009;390(3):443-456. doi:10.1016/j.jmb.2009.04.071
apa: Szymczak, P., & Janovjak, H. L. (2009). Periodic forces trigger a complex
mechanical response in ubiquitin. Journal of Molecular Biology. Elsevier.
https://doi.org/10.1016/j.jmb.2009.04.071
chicago: Szymczak, Piotr, and Harald L Janovjak. “Periodic Forces Trigger a Complex
Mechanical Response in Ubiquitin.” Journal of Molecular Biology. Elsevier,
2009. https://doi.org/10.1016/j.jmb.2009.04.071.
ieee: P. Szymczak and H. L. Janovjak, “Periodic forces trigger a complex mechanical
response in ubiquitin,” Journal of Molecular Biology, vol. 390, no. 3.
Elsevier, pp. 443–456, 2009.
ista: Szymczak P, Janovjak HL. 2009. Periodic forces trigger a complex mechanical
response in ubiquitin. Journal of Molecular Biology. 390(3), 443–456.
mla: Szymczak, Piotr, and Harald L. Janovjak. “Periodic Forces Trigger a Complex
Mechanical Response in Ubiquitin.” Journal of Molecular Biology, vol. 390,
no. 3, Elsevier, 2009, pp. 443–56, doi:10.1016/j.jmb.2009.04.071.
short: P. Szymczak, H.L. Janovjak, Journal of Molecular Biology 390 (2009) 443–456.
date_created: 2018-12-11T12:03:10Z
date_published: 2009-07-17T00:00:00Z
date_updated: 2021-01-12T07:43:16Z
day: '17'
doi: 10.1016/j.jmb.2009.04.071
extern: 1
intvolume: ' 390'
issue: '3'
month: '07'
page: 443 - 456
publication: Journal of Molecular Biology
publication_status: published
publisher: Elsevier
publist_id: '2994'
quality_controlled: 0
status: public
title: Periodic forces trigger a complex mechanical response in ubiquitin
type: journal_article
volume: 390
year: '2009'
...
---
_id: '13414'
abstract:
- lang: eng
text: Supraspherical aggregates of crosslinked metal nanoparticles are transformed
into pancakes and nanorods by mechanical stresses and shears imparted by macroscopic
objects (see image). The dimensions of both types of nanostructures can be controlled
by the pressures applied.
article_processing_charge: No
article_type: original
author:
- first_name: Kevin P.
full_name: Browne, Kevin P.
last_name: Browne
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
- first_name: JulieAnn
full_name: Villa, JulieAnn
last_name: Villa
- first_name: Bartosz A.
full_name: Grzybowski, Bartosz A.
last_name: Grzybowski
citation:
ama: Browne KP, Klajn R, Villa J, Grzybowski BA. Mechanofabrication of pancake and
rodlike nanostructures from deformable nanoparticle aggregates. Small.
2009;5(23):2656-2658. doi:10.1002/smll.200900902
apa: Browne, K. P., Klajn, R., Villa, J., & Grzybowski, B. A. (2009). Mechanofabrication
of pancake and rodlike nanostructures from deformable nanoparticle aggregates.
Small. Wiley. https://doi.org/10.1002/smll.200900902
chicago: Browne, Kevin P., Rafal Klajn, JulieAnn Villa, and Bartosz A. Grzybowski.
“Mechanofabrication of Pancake and Rodlike Nanostructures from Deformable Nanoparticle
Aggregates.” Small. Wiley, 2009. https://doi.org/10.1002/smll.200900902.
ieee: K. P. Browne, R. Klajn, J. Villa, and B. A. Grzybowski, “Mechanofabrication
of pancake and rodlike nanostructures from deformable nanoparticle aggregates,”
Small, vol. 5, no. 23. Wiley, pp. 2656–2658, 2009.
ista: Browne KP, Klajn R, Villa J, Grzybowski BA. 2009. Mechanofabrication of pancake
and rodlike nanostructures from deformable nanoparticle aggregates. Small. 5(23),
2656–2658.
mla: Browne, Kevin P., et al. “Mechanofabrication of Pancake and Rodlike Nanostructures
from Deformable Nanoparticle Aggregates.” Small, vol. 5, no. 23, Wiley,
2009, pp. 2656–58, doi:10.1002/smll.200900902.
short: K.P. Browne, R. Klajn, J. Villa, B.A. Grzybowski, Small 5 (2009) 2656–2658.
date_created: 2023-08-01T09:50:12Z
date_published: 2009-12-01T00:00:00Z
date_updated: 2023-08-08T08:49:22Z
day: '01'
doi: 10.1002/smll.200900902
extern: '1'
external_id:
pmid:
- '19771567'
intvolume: ' 5'
issue: '23'
keyword:
- Biomaterials
- Biotechnology
- General Materials Science
- General Chemistry
language:
- iso: eng
month: '12'
oa_version: None
page: 2656-2658
pmid: 1
publication: Small
publication_identifier:
eissn:
- 1613-6829
issn:
- 1613-6810
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: Mechanofabrication of pancake and rodlike nanostructures from deformable nanoparticle
aggregates
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 5
year: '2009'
...
---
_id: '13415'
abstract:
- lang: eng
text: Systems in which nanoscale components of different types can be captured and/or
released from organic scaffolds provide a fertile basis for the construction of
dynamic, exchangeable functional materials. In such heterogeneous systems, the
components interact with one another by means of programmable, noncovalent bonding
interactions. Herein, we describe polymers that capture and release functionalized
nanoparticles selectively during redox-controlled aggregation and disaggregation,
respectively. The interactions between the polymer and the NPs are mediated by
the reversible formation of polypseudorotaxanes, and give rise to architectures
ranging from short chains composed of few nanoparticles to extended networks of
nanoparticles crosslinked by the polymer. In the latter case, the polymer/nanoparticle
aggregates precipitate from solution such that the polymer acts as a selective
‘sponge’ for the capture/release of the nanoparticles of different types.
article_processing_charge: No
article_type: original
author:
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
- first_name: Mark A.
full_name: Olson, Mark A.
last_name: Olson
- first_name: Paul J.
full_name: Wesson, Paul J.
last_name: Wesson
- first_name: Lei
full_name: Fang, Lei
last_name: Fang
- first_name: Ali
full_name: Coskun, Ali
last_name: Coskun
- first_name: Ali
full_name: Trabolsi, Ali
last_name: Trabolsi
- first_name: Siowling
full_name: Soh, Siowling
last_name: Soh
- first_name: J. Fraser
full_name: Stoddart, J. Fraser
last_name: Stoddart
- first_name: Bartosz A.
full_name: Grzybowski, Bartosz A.
last_name: Grzybowski
citation:
ama: Klajn R, Olson MA, Wesson PJ, et al. Dynamic hook-and-eye nanoparticle sponges.
Nature Chemistry. 2009;1:733-738. doi:10.1038/nchem.432
apa: Klajn, R., Olson, M. A., Wesson, P. J., Fang, L., Coskun, A., Trabolsi, A.,
… Grzybowski, B. A. (2009). Dynamic hook-and-eye nanoparticle sponges. Nature
Chemistry. Springer Nature. https://doi.org/10.1038/nchem.432
chicago: Klajn, Rafal, Mark A. Olson, Paul J. Wesson, Lei Fang, Ali Coskun, Ali
Trabolsi, Siowling Soh, J. Fraser Stoddart, and Bartosz A. Grzybowski. “Dynamic
Hook-and-Eye Nanoparticle Sponges.” Nature Chemistry. Springer Nature,
2009. https://doi.org/10.1038/nchem.432.
ieee: R. Klajn et al., “Dynamic hook-and-eye nanoparticle sponges,” Nature
Chemistry, vol. 1. Springer Nature, pp. 733–738, 2009.
ista: Klajn R, Olson MA, Wesson PJ, Fang L, Coskun A, Trabolsi A, Soh S, Stoddart
JF, Grzybowski BA. 2009. Dynamic hook-and-eye nanoparticle sponges. Nature Chemistry.
1, 733–738.
mla: Klajn, Rafal, et al. “Dynamic Hook-and-Eye Nanoparticle Sponges.” Nature
Chemistry, vol. 1, Springer Nature, 2009, pp. 733–38, doi:10.1038/nchem.432.
short: R. Klajn, M.A. Olson, P.J. Wesson, L. Fang, A. Coskun, A. Trabolsi, S. Soh,
J.F. Stoddart, B.A. Grzybowski, Nature Chemistry 1 (2009) 733–738.
date_created: 2023-08-01T09:50:23Z
date_published: 2009-12-01T00:00:00Z
date_updated: 2023-08-08T08:55:36Z
day: '01'
doi: 10.1038/nchem.432
extern: '1'
external_id:
pmid:
- '21124361'
intvolume: ' 1'
keyword:
- General Chemical Engineering
- General Chemistry
language:
- iso: eng
month: '12'
oa_version: None
page: 733-738
pmid: 1
publication: Nature Chemistry
publication_identifier:
eissn:
- 1755-4349
issn:
- 1755-4330
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Dynamic hook-and-eye nanoparticle sponges
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 1
year: '2009'
...
---
_id: '13416'
abstract:
- lang: eng
text: The reversible molecular template-directed self-assembly of gold nanoparticles
(AuNPs), a process which relies solely on noncovalent bonding interactions, has
been demonstrated by high-resolution transmission electron microscopy (HR-TEM).
By employing a well-known host−guest binding motif, the AuNPs have been systemized
into discrete dimers, trimers, and tetramers. These nanoparticulate twins, triplets,
and quadruplets, which can be disassembled and reassembled either chemically or
electrochemically, can be coalesced into larger, permanent polygonal structures
by thermal treatment using a focused HR-TEM electron beam.
article_processing_charge: No
article_type: original
author:
- first_name: Mark A.
full_name: Olson, Mark A.
last_name: Olson
- first_name: Ali
full_name: Coskun, Ali
last_name: Coskun
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
- first_name: Lei
full_name: Fang, Lei
last_name: Fang
- first_name: Sanjeev K.
full_name: Dey, Sanjeev K.
last_name: Dey
- first_name: Kevin P.
full_name: Browne, Kevin P.
last_name: Browne
- first_name: Bartosz A.
full_name: Grzybowski, Bartosz A.
last_name: Grzybowski
- first_name: J. Fraser
full_name: Stoddart, J. Fraser
last_name: Stoddart
citation:
ama: Olson MA, Coskun A, Klajn R, et al. Assembly of polygonal nanoparticle clusters
directed by reversible noncovalent bonding interactions. Nano Letters.
2009;9(9):3185-3190. doi:10.1021/nl901385c
apa: Olson, M. A., Coskun, A., Klajn, R., Fang, L., Dey, S. K., Browne, K. P., …
Stoddart, J. F. (2009). Assembly of polygonal nanoparticle clusters directed by
reversible noncovalent bonding interactions. Nano Letters. American Chemical
Society. https://doi.org/10.1021/nl901385c
chicago: Olson, Mark A., Ali Coskun, Rafal Klajn, Lei Fang, Sanjeev K. Dey, Kevin
P. Browne, Bartosz A. Grzybowski, and J. Fraser Stoddart. “Assembly of Polygonal
Nanoparticle Clusters Directed by Reversible Noncovalent Bonding Interactions.”
Nano Letters. American Chemical Society, 2009. https://doi.org/10.1021/nl901385c.
ieee: M. A. Olson et al., “Assembly of polygonal nanoparticle clusters directed
by reversible noncovalent bonding interactions,” Nano Letters, vol. 9,
no. 9. American Chemical Society, pp. 3185–3190, 2009.
ista: Olson MA, Coskun A, Klajn R, Fang L, Dey SK, Browne KP, Grzybowski BA, Stoddart
JF. 2009. Assembly of polygonal nanoparticle clusters directed by reversible noncovalent
bonding interactions. Nano Letters. 9(9), 3185–3190.
mla: Olson, Mark A., et al. “Assembly of Polygonal Nanoparticle Clusters Directed
by Reversible Noncovalent Bonding Interactions.” Nano Letters, vol. 9,
no. 9, American Chemical Society, 2009, pp. 3185–90, doi:10.1021/nl901385c.
short: M.A. Olson, A. Coskun, R. Klajn, L. Fang, S.K. Dey, K.P. Browne, B.A. Grzybowski,
J.F. Stoddart, Nano Letters 9 (2009) 3185–3190.
date_created: 2023-08-01T10:29:27Z
date_published: 2009-09-09T00:00:00Z
date_updated: 2023-08-08T08:57:34Z
day: '09'
doi: 10.1021/nl901385c
extern: '1'
external_id:
pmid:
- '19694461'
intvolume: ' 9'
issue: '9'
keyword:
- Mechanical Engineering
- Condensed Matter Physics
- General Materials Science
- General Chemistry
- Bioengineering
language:
- iso: eng
month: '09'
oa_version: None
page: 3185-3190
pmid: 1
publication: Nano Letters
publication_identifier:
eissn:
- 1530-6992
issn:
- 1530-6984
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Assembly of polygonal nanoparticle clusters directed by reversible noncovalent
bonding interactions
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 9
year: '2009'
...
---
_id: '13417'
abstract:
- lang: eng
text: 'Mission Impossible: Metal nanoparticles (NPs) coated with photoresponsive
ligands are used as “inks” for self-erasing “paper” whereby light-induced self-assembly
of the NPs is transduced into local color changes (see picture). Depending on
the degree of self-assembly, multicolor images can be written using only one type
of NP ink. Duration of image erasure is regulated by the surface concentration
of photoactive groups and can range from seconds to days.'
article_processing_charge: No
article_type: original
author:
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
- first_name: Paul J.
full_name: Wesson, Paul J.
last_name: Wesson
- first_name: Kyle J. M.
full_name: Bishop, Kyle J. M.
last_name: Bishop
- first_name: Bartosz A.
full_name: Grzybowski, Bartosz A.
last_name: Grzybowski
citation:
ama: Klajn R, Wesson PJ, Bishop KJM, Grzybowski BA. Writing self-erasing images
using metastable nanoparticle “inks.” Angewandte Chemie International Edition.
2009;48(38):7035-7039. doi:10.1002/anie.200901119
apa: Klajn, R., Wesson, P. J., Bishop, K. J. M., & Grzybowski, B. A. (2009).
Writing self-erasing images using metastable nanoparticle “inks.” Angewandte
Chemie International Edition. Wiley. https://doi.org/10.1002/anie.200901119
chicago: Klajn, Rafal, Paul J. Wesson, Kyle J. M. Bishop, and Bartosz A. Grzybowski.
“Writing Self-Erasing Images Using Metastable Nanoparticle ‘Inks.’” Angewandte
Chemie International Edition. Wiley, 2009. https://doi.org/10.1002/anie.200901119.
ieee: R. Klajn, P. J. Wesson, K. J. M. Bishop, and B. A. Grzybowski, “Writing self-erasing
images using metastable nanoparticle ‘inks,’” Angewandte Chemie International
Edition, vol. 48, no. 38. Wiley, pp. 7035–7039, 2009.
ista: Klajn R, Wesson PJ, Bishop KJM, Grzybowski BA. 2009. Writing self-erasing
images using metastable nanoparticle “inks”. Angewandte Chemie International Edition.
48(38), 7035–7039.
mla: Klajn, Rafal, et al. “Writing Self-Erasing Images Using Metastable Nanoparticle
‘Inks.’” Angewandte Chemie International Edition, vol. 48, no. 38, Wiley,
2009, pp. 7035–39, doi:10.1002/anie.200901119.
short: R. Klajn, P.J. Wesson, K.J.M. Bishop, B.A. Grzybowski, Angewandte Chemie
International Edition 48 (2009) 7035–7039.
date_created: 2023-08-01T10:29:38Z
date_published: 2009-09-01T00:00:00Z
date_updated: 2023-08-08T08:59:15Z
day: '01'
doi: 10.1002/anie.200901119
extern: '1'
external_id:
pmid:
- '19533698'
intvolume: ' 48'
issue: '38'
keyword:
- General Chemistry
- Catalysis
language:
- iso: eng
month: '09'
oa_version: None
page: 7035-7039
pmid: 1
publication: Angewandte Chemie International Edition
publication_identifier:
eissn:
- 1521-3773
issn:
- 1433-7851
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: Writing self-erasing images using metastable nanoparticle “inks”
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 48
year: '2009'
...
---
_id: '13418'
abstract:
- lang: eng
text: In traditional photoconductors1,2,3, the impinging light generates mobile
charge carriers in the valence and/or conduction bands, causing the material’s
conductivity to increase4. Such positive photoconductance is observed in both
bulk and nanostructured5,6 photoconductors. Here we describe a class of nanoparticle-based
materials whose conductivity can either increase or decrease on irradiation with
visible light of wavelengths close to the particles’ surface plasmon resonance.
The remarkable feature of these plasmonic materials is that the sign of the conductivity
change and the nature of the electron transport between the nanoparticles depend
on the molecules comprising the self-assembled monolayers (SAMs)7,8 stabilizing
the nanoparticles. For SAMs made of electrically neutral (polar and non-polar)
molecules, conductivity increases on irradiation. If, however, the SAMs contain
electrically charged (either negatively or positively) groups, conductivity decreases.
The optical and electrical characteristics of these previously undescribed inverse
photoconductors can be engineered flexibly by adjusting the material properties
of the nanoparticles and of the coating SAMs. In particular, in films comprising
mixtures of different nanoparticles or nanoparticles coated with mixed SAMs, the
overall photoconductance is a weighted average of the changes induced by the individual
components. These and other observations can be rationalized in terms of light-induced
creation of mobile charge carriers whose transport through the charged SAMs is
inhibited by carrier trapping in transient polaron-like states9,10. The nanoparticle-based
photoconductors we describe could have uses in chemical sensors and/or in conjunction
with flexible substrates.
article_processing_charge: No
article_type: original
author:
- first_name: Hideyuki
full_name: Nakanishi, Hideyuki
last_name: Nakanishi
- first_name: Kyle J. M.
full_name: Bishop, Kyle J. M.
last_name: Bishop
- first_name: Bartlomiej
full_name: Kowalczyk, Bartlomiej
last_name: Kowalczyk
- first_name: Abraham
full_name: Nitzan, Abraham
last_name: Nitzan
- first_name: Emily A.
full_name: Weiss, Emily A.
last_name: Weiss
- first_name: Konstantin V.
full_name: Tretiakov, Konstantin V.
last_name: Tretiakov
- first_name: Mario M.
full_name: Apodaca, Mario M.
last_name: Apodaca
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
- first_name: J. Fraser
full_name: Stoddart, J. Fraser
last_name: Stoddart
- first_name: Bartosz A.
full_name: Grzybowski, Bartosz A.
last_name: Grzybowski
citation:
ama: Nakanishi H, Bishop KJM, Kowalczyk B, et al. Photoconductance and inverse photoconductance
in films of functionalized metal nanoparticles. Nature. 2009;460(7253):371-375.
doi:10.1038/nature08131
apa: Nakanishi, H., Bishop, K. J. M., Kowalczyk, B., Nitzan, A., Weiss, E. A., Tretiakov,
K. V., … Grzybowski, B. A. (2009). Photoconductance and inverse photoconductance
in films of functionalized metal nanoparticles. Nature. Springer Nature.
https://doi.org/10.1038/nature08131
chicago: Nakanishi, Hideyuki, Kyle J. M. Bishop, Bartlomiej Kowalczyk, Abraham Nitzan,
Emily A. Weiss, Konstantin V. Tretiakov, Mario M. Apodaca, Rafal Klajn, J. Fraser
Stoddart, and Bartosz A. Grzybowski. “Photoconductance and Inverse Photoconductance
in Films of Functionalized Metal Nanoparticles.” Nature. Springer Nature,
2009. https://doi.org/10.1038/nature08131.
ieee: H. Nakanishi et al., “Photoconductance and inverse photoconductance
in films of functionalized metal nanoparticles,” Nature, vol. 460, no.
7253. Springer Nature, pp. 371–375, 2009.
ista: Nakanishi H, Bishop KJM, Kowalczyk B, Nitzan A, Weiss EA, Tretiakov KV, Apodaca
MM, Klajn R, Stoddart JF, Grzybowski BA. 2009. Photoconductance and inverse photoconductance
in films of functionalized metal nanoparticles. Nature. 460(7253), 371–375.
mla: Nakanishi, Hideyuki, et al. “Photoconductance and Inverse Photoconductance
in Films of Functionalized Metal Nanoparticles.” Nature, vol. 460, no.
7253, Springer Nature, 2009, pp. 371–75, doi:10.1038/nature08131.
short: H. Nakanishi, K.J.M. Bishop, B. Kowalczyk, A. Nitzan, E.A. Weiss, K.V. Tretiakov,
M.M. Apodaca, R. Klajn, J.F. Stoddart, B.A. Grzybowski, Nature 460 (2009) 371–375.
date_created: 2023-08-01T10:29:50Z
date_published: 2009-07-16T00:00:00Z
date_updated: 2023-08-08T09:00:59Z
day: '16'
doi: 10.1038/nature08131
extern: '1'
external_id:
pmid:
- '19606145'
intvolume: ' 460'
issue: '7253'
keyword:
- Multidisciplinary
language:
- iso: eng
month: '07'
oa_version: None
page: 371-375
pmid: 1
publication: Nature
publication_identifier:
eissn:
- 1476-4687
issn:
- 0028-0836
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Photoconductance and inverse photoconductance in films of functionalized metal
nanoparticles
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 460
year: '2009'
...
---
_id: '13419'
abstract:
- lang: eng
text: Reaction-diffusion (RD) processes initiated from the surfaces of mesoscopic
particles can fabricate complex core-and-shell structures. The propagation of
a sharp RD front selectively removes metal colloids or nanoparticles from the
supporting gel or polymer matrix. Once fabricated, the core structures can be
processed “remotely” via galvanic replacement reactions, and the composite particles
can be assembled into open-lattice crystals.
article_processing_charge: No
article_type: original
author:
- first_name: Paul J.
full_name: Wesson, Paul J.
last_name: Wesson
- first_name: Siowling
full_name: Soh, Siowling
last_name: Soh
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
- first_name: Kyle J. M.
full_name: Bishop, Kyle J. M.
last_name: Bishop
- first_name: Timothy P.
full_name: Gray, Timothy P.
last_name: Gray
- first_name: Bartosz A.
full_name: Grzybowski, Bartosz A.
last_name: Grzybowski
citation:
ama: 'Wesson PJ, Soh S, Klajn R, Bishop KJM, Gray TP, Grzybowski BA. “Remote” fabrication
via three-dimensional reaction-diffusion: Making complex core-and-shell particles
and assembling them into open-lattice crystals. Advanced Materials. 2009;21(19):1911-1915.
doi:10.1002/adma.200802964'
apa: 'Wesson, P. J., Soh, S., Klajn, R., Bishop, K. J. M., Gray, T. P., & Grzybowski,
B. A. (2009). “Remote” fabrication via three-dimensional reaction-diffusion: Making
complex core-and-shell particles and assembling them into open-lattice crystals.
Advanced Materials. Wiley. https://doi.org/10.1002/adma.200802964'
chicago: 'Wesson, Paul J., Siowling Soh, Rafal Klajn, Kyle J. M. Bishop, Timothy
P. Gray, and Bartosz A. Grzybowski. “‘Remote’ Fabrication via Three-Dimensional
Reaction-Diffusion: Making Complex Core-and-Shell Particles and Assembling Them
into Open-Lattice Crystals.” Advanced Materials. Wiley, 2009. https://doi.org/10.1002/adma.200802964.'
ieee: 'P. J. Wesson, S. Soh, R. Klajn, K. J. M. Bishop, T. P. Gray, and B. A. Grzybowski,
“‘Remote’ fabrication via three-dimensional reaction-diffusion: Making complex
core-and-shell particles and assembling them into open-lattice crystals,” Advanced
Materials, vol. 21, no. 19. Wiley, pp. 1911–1915, 2009.'
ista: 'Wesson PJ, Soh S, Klajn R, Bishop KJM, Gray TP, Grzybowski BA. 2009. “Remote”
fabrication via three-dimensional reaction-diffusion: Making complex core-and-shell
particles and assembling them into open-lattice crystals. Advanced Materials.
21(19), 1911–1915.'
mla: 'Wesson, Paul J., et al. “‘Remote’ Fabrication via Three-Dimensional Reaction-Diffusion:
Making Complex Core-and-Shell Particles and Assembling Them into Open-Lattice
Crystals.” Advanced Materials, vol. 21, no. 19, Wiley, 2009, pp. 1911–15,
doi:10.1002/adma.200802964.'
short: P.J. Wesson, S. Soh, R. Klajn, K.J.M. Bishop, T.P. Gray, B.A. Grzybowski,
Advanced Materials 21 (2009) 1911–1915.
date_created: 2023-08-01T10:30:04Z
date_published: 2009-05-18T00:00:00Z
date_updated: 2023-08-08T09:04:07Z
day: '18'
doi: 10.1002/adma.200802964
extern: '1'
intvolume: ' 21'
issue: '19'
keyword:
- Mechanical Engineering
- Mechanics of Materials
- General Materials Science
language:
- iso: eng
month: '05'
oa_version: None
page: 1911-1915
publication: Advanced Materials
publication_identifier:
eissn:
- 1521-4095
issn:
- 0935-9648
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: '“Remote” fabrication via three-dimensional reaction-diffusion: Making complex
core-and-shell particles and assembling them into open-lattice crystals'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 21
year: '2009'
...
---
_id: '13420'
abstract:
- lang: eng
text: Weakly protected metal nanoparticles (MNPs) are used as precursors for the
preparation of catenane- and pseudorotaxane-decorated NPs of various compositions
(gold, palladium, platinum). When attached to the surface of MNPs, the molecular
switches retain their switching abilities. The redox potentials of these switches
depend on and can be regulated by the composition of the mixed self-assembled
monolayers covering the MNPs.
article_processing_charge: No
article_type: original
author:
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
- first_name: Lei
full_name: Fang, Lei
last_name: Fang
- first_name: Ali
full_name: Coskun, Ali
last_name: Coskun
- first_name: Mark A.
full_name: Olson, Mark A.
last_name: Olson
- first_name: Paul J.
full_name: Wesson, Paul J.
last_name: Wesson
- first_name: J. Fraser
full_name: Stoddart, J. Fraser
last_name: Stoddart
- first_name: Bartosz A.
full_name: Grzybowski, Bartosz A.
last_name: Grzybowski
citation:
ama: Klajn R, Fang L, Coskun A, et al. Metal nanoparticles functionalized with molecular
and supramolecular switches. Journal of the American Chemical Society.
2009;131(12):4233-4235. doi:10.1021/ja9001585
apa: Klajn, R., Fang, L., Coskun, A., Olson, M. A., Wesson, P. J., Stoddart, J.
F., & Grzybowski, B. A. (2009). Metal nanoparticles functionalized with molecular
and supramolecular switches. Journal of the American Chemical Society.
American Chemical Society. https://doi.org/10.1021/ja9001585
chicago: Klajn, Rafal, Lei Fang, Ali Coskun, Mark A. Olson, Paul J. Wesson, J. Fraser
Stoddart, and Bartosz A. Grzybowski. “Metal Nanoparticles Functionalized with
Molecular and Supramolecular Switches.” Journal of the American Chemical Society.
American Chemical Society, 2009. https://doi.org/10.1021/ja9001585.
ieee: R. Klajn et al., “Metal nanoparticles functionalized with molecular
and supramolecular switches,” Journal of the American Chemical Society,
vol. 131, no. 12. American Chemical Society, pp. 4233–4235, 2009.
ista: Klajn R, Fang L, Coskun A, Olson MA, Wesson PJ, Stoddart JF, Grzybowski BA.
2009. Metal nanoparticles functionalized with molecular and supramolecular switches.
Journal of the American Chemical Society. 131(12), 4233–4235.
mla: Klajn, Rafal, et al. “Metal Nanoparticles Functionalized with Molecular and
Supramolecular Switches.” Journal of the American Chemical Society, vol.
131, no. 12, American Chemical Society, 2009, pp. 4233–35, doi:10.1021/ja9001585.
short: R. Klajn, L. Fang, A. Coskun, M.A. Olson, P.J. Wesson, J.F. Stoddart, B.A.
Grzybowski, Journal of the American Chemical Society 131 (2009) 4233–4235.
date_created: 2023-08-01T10:30:17Z
date_published: 2009-04-01T00:00:00Z
date_updated: 2023-08-08T09:06:00Z
day: '01'
doi: 10.1021/ja9001585
extern: '1'
external_id:
pmid:
- '19265400'
intvolume: ' 131'
issue: '12'
keyword:
- Colloid and Surface Chemistry
- Biochemistry
- General Chemistry
- Catalysis
language:
- iso: eng
month: '04'
oa_version: None
page: 4233-4235
pmid: 1
publication: Journal of the American Chemical Society
publication_identifier:
eissn:
- 1520-5126
issn:
- 0002-7863
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Metal nanoparticles functionalized with molecular and supramolecular switches
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 131
year: '2009'
...
---
_id: '13421'
abstract:
- lang: eng
text: Side-chain poly[2]catenanes at the click of a switch! A bistable side-chain
poly[2]catenane has been synthesized and found to form hierarchical self-assembled
hollow superstructures of nanoscale dimensions in solution. Molecular electromechanical
switching (see picture) of the material is demonstrated, and the ground-state
equilibrium thermodynamics and switching kinetics are examined as the initial
steps towards processible molecular-based electronic devices and nanoelectromechanical
systems.
article_processing_charge: No
article_type: original
author:
- first_name: Mark A.
full_name: Olson, Mark A.
last_name: Olson
- first_name: Adam B.
full_name: Braunschweig, Adam B.
last_name: Braunschweig
- first_name: Lei
full_name: Fang, Lei
last_name: Fang
- first_name: Taichi
full_name: Ikeda, Taichi
last_name: Ikeda
- first_name: Rafal
full_name: Klajn, Rafal
id: 8e84690e-1e48-11ed-a02b-a1e6fb8bb53b
last_name: Klajn
- first_name: Ali
full_name: Trabolsi, Ali
last_name: Trabolsi
- first_name: Paul J.
full_name: Wesson, Paul J.
last_name: Wesson
- first_name: Diego
full_name: Benítez, Diego
last_name: Benítez
- first_name: Chad A.
full_name: Mirkin, Chad A.
last_name: Mirkin
- first_name: Bartosz A.
full_name: Grzybowski, Bartosz A.
last_name: Grzybowski
- first_name: J. Fraser
full_name: Stoddart, J. Fraser
last_name: Stoddart
citation:
ama: Olson MA, Braunschweig AB, Fang L, et al. A bistable poly[2]catenane forms
nanosuperstructures. Angewandte Chemie International Edition. 2009;48(10):1792-1797.
doi:10.1002/anie.200804558
apa: Olson, M. A., Braunschweig, A. B., Fang, L., Ikeda, T., Klajn, R., Trabolsi,
A., … Stoddart, J. F. (2009). A bistable poly[2]catenane forms nanosuperstructures.
Angewandte Chemie International Edition. Wiley. https://doi.org/10.1002/anie.200804558
chicago: Olson, Mark A., Adam B. Braunschweig, Lei Fang, Taichi Ikeda, Rafal Klajn,
Ali Trabolsi, Paul J. Wesson, et al. “A Bistable Poly[2]Catenane Forms Nanosuperstructures.”
Angewandte Chemie International Edition. Wiley, 2009. https://doi.org/10.1002/anie.200804558.
ieee: M. A. Olson et al., “A bistable poly[2]catenane forms nanosuperstructures,”
Angewandte Chemie International Edition, vol. 48, no. 10. Wiley, pp. 1792–1797,
2009.
ista: Olson MA, Braunschweig AB, Fang L, Ikeda T, Klajn R, Trabolsi A, Wesson PJ,
Benítez D, Mirkin CA, Grzybowski BA, Stoddart JF. 2009. A bistable poly[2]catenane
forms nanosuperstructures. Angewandte Chemie International Edition. 48(10), 1792–1797.
mla: Olson, Mark A., et al. “A Bistable Poly[2]Catenane Forms Nanosuperstructures.”
Angewandte Chemie International Edition, vol. 48, no. 10, Wiley, 2009,
pp. 1792–97, doi:10.1002/anie.200804558.
short: M.A. Olson, A.B. Braunschweig, L. Fang, T. Ikeda, R. Klajn, A. Trabolsi,
P.J. Wesson, D. Benítez, C.A. Mirkin, B.A. Grzybowski, J.F. Stoddart, Angewandte
Chemie International Edition 48 (2009) 1792–1797.
date_created: 2023-08-01T10:30:30Z
date_published: 2009-02-23T00:00:00Z
date_updated: 2023-08-08T11:12:29Z
day: '23'
doi: 10.1002/anie.200804558
extern: '1'
external_id:
pmid:
- '19180620'
intvolume: ' 48'
issue: '10'
keyword:
- General Chemistry
- Catalysis
language:
- iso: eng
month: '02'
oa_version: None
page: 1792-1797
pmid: 1
publication: Angewandte Chemie International Edition
publication_identifier:
eissn:
- 1521-3773
issn:
- 1433-7851
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: A bistable poly[2]catenane forms nanosuperstructures
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 48
year: '2009'
...
---
_id: '17809'
abstract:
- lang: eng
text: Supermassive black hole binaries (SMBHBs) in galactic nuclei are thought to
be a common by-product of major galaxy mergers. We use simple disk models for
the circumbinary gas and for the binary–disk interaction to follow the orbital
decay of SMBHBs with a range of total masses (M) and mass ratios (q), through
physically distinct regions of the disk, until gravitational waves (GWs) take
over their evolution. Prior to the GW-driven phase, the viscous decay is generically
in the stalled "secondary-dominated" regime. SMBHBs spend a non-negligible fraction
of a fiducial time of 107 yr at orbital periods between days ≲torb≲ yr, and we
argue that they may be sufficiently common to be detectable, provided they are
luminous during these stages. A dedicated optical or X-ray survey could identify
coalescing SMBHBs statistically, as a population of periodically variable quasars,
whose abundance obeys the scaling Nvar ∝ tαvar within a range of periods around
tvar∼ tens of weeks. SMBHBs with M ≲ 107 M☉, with 0.5 ≲ α ≲ 1.5, would probe the
physics of viscous orbital decay, whereas the detection of a population of higher-mass
binaries, with α = 8/3, would confirm that their decay is driven by GWs. The lowest-mass
SMBHBs (M ≲ 105–6 M☉) enter the GW-driven regime at short orbital periods, when
they are already in the frequency band of the Laser Interferometric Space Antenna
(LISA). While viscous processes are negligible in the last few years of coalescence,
they could reduce the amplitude of any unresolved background due to near-stationary
LISA sources. We discuss modest constraints on the SMBHB population already available
from existing data, and the sensitivity and sky coverage requirements for a detection
in future surveys. SMBHBs may also be identified from velocity shifts in their
spectra; we discuss the expected abundance of SMBHBs as a function of their orbital
velocity.
article_processing_charge: No
article_type: original
author:
- first_name: Zoltán
full_name: Haiman, Zoltán
id: 7c006e8c-cc0d-11ee-8322-cb904ef76f36
last_name: Haiman
- first_name: Bence
full_name: Kocsis, Bence
last_name: Kocsis
- first_name: Kristen
full_name: Menou, Kristen
last_name: Menou
citation:
ama: Haiman Z, Kocsis B, Menou K. The population of viscosity- and gravitational
wave-driven supermassive black hole binaries among luminous active galactic nuclei.
The Astrophysical Journal. 2009;700(2):1952-1969. doi:10.1088/0004-637x/700/2/1952
apa: Haiman, Z., Kocsis, B., & Menou, K. (2009). The population of viscosity-
and gravitational wave-driven supermassive black hole binaries among luminous
active galactic nuclei. The Astrophysical Journal. American Astronomical
Society. https://doi.org/10.1088/0004-637x/700/2/1952
chicago: Haiman, Zoltán, Bence Kocsis, and Kristen Menou. “The Population of Viscosity-
and Gravitational Wave-Driven Supermassive Black Hole Binaries among Luminous
Active Galactic Nuclei.” The Astrophysical Journal. American Astronomical
Society, 2009. https://doi.org/10.1088/0004-637x/700/2/1952.
ieee: Z. Haiman, B. Kocsis, and K. Menou, “The population of viscosity- and gravitational
wave-driven supermassive black hole binaries among luminous active galactic nuclei,”
The Astrophysical Journal, vol. 700, no. 2. American Astronomical Society,
pp. 1952–1969, 2009.
ista: Haiman Z, Kocsis B, Menou K. 2009. The population of viscosity- and gravitational
wave-driven supermassive black hole binaries among luminous active galactic nuclei.
The Astrophysical Journal. 700(2), 1952–1969.
mla: Haiman, Zoltán, et al. “The Population of Viscosity- and Gravitational Wave-Driven
Supermassive Black Hole Binaries among Luminous Active Galactic Nuclei.” The
Astrophysical Journal, vol. 700, no. 2, American Astronomical Society, 2009,
pp. 1952–69, doi:10.1088/0004-637x/700/2/1952.
short: Z. Haiman, B. Kocsis, K. Menou, The Astrophysical Journal 700 (2009) 1952–1969.
date_created: 2024-09-06T11:38:01Z
date_published: 2009-07-17T00:00:00Z
date_updated: 2024-09-18T12:26:50Z
day: '17'
doi: 10.1088/0004-637x/700/2/1952
extern: '1'
intvolume: ' 700'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1088/0004-637X/700/2/1952
month: '07'
oa: 1
oa_version: Published Version
page: 1952-1969
publication: The Astrophysical Journal
publication_identifier:
issn:
- 0004-637X
- 1538-4357
publication_status: published
publisher: American Astronomical Society
quality_controlled: '1'
related_material:
link:
- relation: erratum
url: https://doi.org/10.3847/1538-4357/ac93f7
scopus_import: '1'
status: public
title: The population of viscosity- and gravitational wave-driven supermassive black
hole binaries among luminous active galactic nuclei
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 700
year: '2009'
...
---
_id: '1798'
abstract:
- lang: eng
text: The mammalian brain is assembled from thousands of neuronal cell types that
are organized in distinct circuits to perform behaviorally relevant computations.
Transgenic mouse lines with selectively marked cell types would facilitate our
ability to dissect functional components of complex circuits. We carried out a
screen for cell type-specific green fluorescent protein expression in the retina
using BAC transgenic mice from the GENSAT project. Among others, we identified
mouse lines in which the inhibitory cell types of the night vision and directional
selective circuit were selectively labeled. We quantified the stratification patterns
to predict potential synaptic connectivity between marked cells of different lines
and found that some of the lines enabled targeted recordings and imaging of cell
types from developing or mature retinal circuits. Our results suggest the potential
use of a stratification-based screening approach for characterizing neuronal circuitry
in other layered brain structures, such as the neocortex.
acknowledgement: This study was supported by Friedrich Miescher Institute funds, a
US Office of Naval Research Naval International Cooperative Opportunities in Science
and Technology Program grant, a Marie Curie Excellence grant, a National Center
for Competence in Research in Genetics grant and a European Union HEALTH-F2-223156
grant to B.R., and by National Institute of Neurological Disorders and Stroke contracts
N01NS02331 and HHSN271200723701C to N.H.
author:
- first_name: Sandra
full_name: Sandra Siegert
id: 36ACD32E-F248-11E8-B48F-1D18A9856A87
last_name: Siegert
orcid: 0000-0001-8635-0877
- first_name: Brigitte
full_name: Scherf, Brigitte G
last_name: Scherf
- first_name: Karina
full_name: Del Punta, Karina
last_name: Del Punta
- first_name: Nick
full_name: Didkovsky, Nick
last_name: Didkovsky
- first_name: Nathaniel
full_name: Heintz, Nathaniel M
last_name: Heintz
- first_name: Botond
full_name: Roska, Botond M
last_name: Roska
citation:
ama: Siegert S, Scherf B, Del Punta K, Didkovsky N, Heintz N, Roska B. Genetic address
book for retinal cell types. Nature Neuroscience. 2009;12(9):1197-1204.
doi:10.1038/nn.2370
apa: Siegert, S., Scherf, B., Del Punta, K., Didkovsky, N., Heintz, N., & Roska,
B. (2009). Genetic address book for retinal cell types. Nature Neuroscience.
Nature Publishing Group. https://doi.org/10.1038/nn.2370
chicago: Siegert, Sandra, Brigitte Scherf, Karina Del Punta, Nick Didkovsky, Nathaniel
Heintz, and Botond Roska. “Genetic Address Book for Retinal Cell Types.” Nature
Neuroscience. Nature Publishing Group, 2009. https://doi.org/10.1038/nn.2370.
ieee: S. Siegert, B. Scherf, K. Del Punta, N. Didkovsky, N. Heintz, and B. Roska,
“Genetic address book for retinal cell types,” Nature Neuroscience, vol.
12, no. 9. Nature Publishing Group, pp. 1197–1204, 2009.
ista: Siegert S, Scherf B, Del Punta K, Didkovsky N, Heintz N, Roska B. 2009. Genetic
address book for retinal cell types. Nature Neuroscience. 12(9), 1197–1204.
mla: Siegert, Sandra, et al. “Genetic Address Book for Retinal Cell Types.” Nature
Neuroscience, vol. 12, no. 9, Nature Publishing Group, 2009, pp. 1197–204,
doi:10.1038/nn.2370.
short: S. Siegert, B. Scherf, K. Del Punta, N. Didkovsky, N. Heintz, B. Roska, Nature
Neuroscience 12 (2009) 1197–1204.
date_created: 2018-12-11T11:54:04Z
date_published: 2009-09-01T00:00:00Z
date_updated: 2021-01-12T06:53:16Z
day: '01'
doi: 10.1038/nn.2370
extern: 1
intvolume: ' 12'
issue: '9'
month: '09'
page: 1197 - 1204
publication: Nature Neuroscience
publication_status: published
publisher: Nature Publishing Group
publist_id: '5312'
quality_controlled: 0
status: public
title: Genetic address book for retinal cell types
type: journal_article
volume: 12
year: '2009'
...
---
_id: '1799'
abstract:
- lang: eng
text: 'The detection of approaching objects, such as looming predators, is necessary
for survival. Which neurons and circuits mediate this function? We combined genetic
labeling of cell types, two-photon microscopy, electrophysiology and theoretical
modeling to address this question. We identify an approach-sensitive ganglion
cell type in the mouse retina, resolve elements of its afferent neural circuit,
and describe how these confer approach sensitivity on the ganglion cell. The circuit''s
essential building block is a rapid inhibitory pathway: it selectively suppresses
responses to non-approaching objects. This rapid inhibitory pathway, which includes
AII amacrine cells connected to bipolar cells through electrical synapses, was
previously described in the context of night-time vision. In the daytime conditions
of our experiments, the same pathway conveys signals in the reverse direction.
The dual use of a neural pathway in different physiological conditions illustrates
the efficiency with which several functions can be accommodated in a single circuit.'
acknowledgement: The study was supported by Friedrich Miescher Institute funds, a
US Office of Naval Research Naval International Cooperative Opportunities in Science
and Technology program grant, a Marie Curie Excellence Grant, a Human Frontier Science
Program Young Investigator grant, a National Centers of Competence in Research in
Genetics grant and a European Union HEALTH-F2-223156 grant to B.R., a Marie Curie
Postdoctoral Fellowship to T.A.M., the Centre National de la Recherche Scientifique
through the Unité Mixte de Recherche 8550 to R.A.d.S.
author:
- first_name: Thomas
full_name: Münch, Thomas A
last_name: Münch
- first_name: Ravá
full_name: Da Silveira, Ravá A
last_name: Da Silveira
- first_name: Sandra
full_name: Sandra Siegert
id: 36ACD32E-F248-11E8-B48F-1D18A9856A87
last_name: Siegert
orcid: 0000-0001-8635-0877
- first_name: Tim
full_name: Viney, Tim J
last_name: Viney
- first_name: Gautam
full_name: Awatramani, Gautam B
last_name: Awatramani
- first_name: Botond
full_name: Roska, Botond M
last_name: Roska
citation:
ama: Münch T, Da Silveira R, Siegert S, Viney T, Awatramani G, Roska B. Approach
sensitivity in the retina processed by a multifunctional neural circuit. Nature
Neuroscience. 2009;12(10):1308-1316. doi:10.1038/nn.2389
apa: Münch, T., Da Silveira, R., Siegert, S., Viney, T., Awatramani, G., & Roska,
B. (2009). Approach sensitivity in the retina processed by a multifunctional neural
circuit. Nature Neuroscience. Nature Publishing Group. https://doi.org/10.1038/nn.2389
chicago: Münch, Thomas, Ravá Da Silveira, Sandra Siegert, Tim Viney, Gautam Awatramani,
and Botond Roska. “Approach Sensitivity in the Retina Processed by a Multifunctional
Neural Circuit.” Nature Neuroscience. Nature Publishing Group, 2009. https://doi.org/10.1038/nn.2389.
ieee: T. Münch, R. Da Silveira, S. Siegert, T. Viney, G. Awatramani, and B. Roska,
“Approach sensitivity in the retina processed by a multifunctional neural circuit,”
Nature Neuroscience, vol. 12, no. 10. Nature Publishing Group, pp. 1308–1316,
2009.
ista: Münch T, Da Silveira R, Siegert S, Viney T, Awatramani G, Roska B. 2009. Approach
sensitivity in the retina processed by a multifunctional neural circuit. Nature
Neuroscience. 12(10), 1308–1316.
mla: Münch, Thomas, et al. “Approach Sensitivity in the Retina Processed by a Multifunctional
Neural Circuit.” Nature Neuroscience, vol. 12, no. 10, Nature Publishing
Group, 2009, pp. 1308–16, doi:10.1038/nn.2389.
short: T. Münch, R. Da Silveira, S. Siegert, T. Viney, G. Awatramani, B. Roska,
Nature Neuroscience 12 (2009) 1308–1316.
date_created: 2018-12-11T11:54:04Z
date_published: 2009-10-01T00:00:00Z
date_updated: 2021-01-12T06:53:16Z
day: '01'
doi: 10.1038/nn.2389
extern: 1
intvolume: ' 12'
issue: '10'
month: '10'
page: 1308 - 1316
publication: Nature Neuroscience
publication_status: published
publisher: Nature Publishing Group
publist_id: '5311'
quality_controlled: 0
status: public
title: Approach sensitivity in the retina processed by a multifunctional neural circuit
type: journal_article
volume: 12
year: '2009'
...
---
OA_type: closed access
_id: '18028'
abstract:
- lang: eng
text: We measure the conductance and current–voltage characteristics of two amine-terminated
molecular wires— 4,4'-diaminostilbene and bis-(4-aminophenyl)acetylene—by breaking
Au point contacts in a molecular solution at room temperature. Histograms compiled
from thousands of measurements show a slight increase in the molecular junction
conductance (I/V) as the bias is increased to nearly 450 mV. Comparatively, similar
conductance measurements made with 1,6-diaminohexane, a saturated molecule, demonstrate
almost no bias dependence. We also present a new technique to measure a statistically
defined current–voltage (I–V) curve. Application to all three molecules shows
that 4,4'-diaminostilbene exhibits the largest increase in differential conductance
as a function of applied bias. This indicates that the predominant transport channel
for 4,4'-diaminostilbene (the highest occupied molecular orbital) is closer to
the Fermi level of the metal than that of the other molecules, consistent with
the trends observed in the molecular ionization potential. We find that junctions
constructed with the conjugated molecules show greater noise in individual junctions
and less structural stability, on average, at biases greater than 450 mV. In contrast,
junctions formed with the alkane can sustain a bias of up to 900 mV. This significantly
affects the statistically averaged I–V characteristic measured for the conjugated
molecules at higher bias.
article_number: '434009'
article_processing_charge: No
article_type: original
author:
- first_name: J R
full_name: Widawsky, J R
last_name: Widawsky
- first_name: M
full_name: Kamenetska, M
last_name: Kamenetska
- first_name: J
full_name: Klare, J
last_name: Klare
- first_name: C
full_name: Nuckolls, C
last_name: Nuckolls
- first_name: M L
full_name: Steigerwald, M L
last_name: Steigerwald
- first_name: M S
full_name: Hybertsen, M S
last_name: Hybertsen
- first_name: Latha
full_name: Venkataraman, Latha
id: 9ebb78a5-cc0d-11ee-8322-fae086a32caf
last_name: Venkataraman
orcid: 0000-0002-6957-6089
citation:
ama: Widawsky JR, Kamenetska M, Klare J, et al. Measurement of voltage-dependent
electronic transport across amine-linked single-molecular-wire junctions. Nanotechnology.
2009;20(43). doi:10.1088/0957-4484/20/43/434009
apa: Widawsky, J. R., Kamenetska, M., Klare, J., Nuckolls, C., Steigerwald, M. L.,
Hybertsen, M. S., & Venkataraman, L. (2009). Measurement of voltage-dependent
electronic transport across amine-linked single-molecular-wire junctions. Nanotechnology.
IOP Publishing. https://doi.org/10.1088/0957-4484/20/43/434009
chicago: Widawsky, J R, M Kamenetska, J Klare, C Nuckolls, M L Steigerwald, M S
Hybertsen, and Latha Venkataraman. “Measurement of Voltage-Dependent Electronic
Transport across Amine-Linked Single-Molecular-Wire Junctions.” Nanotechnology.
IOP Publishing, 2009. https://doi.org/10.1088/0957-4484/20/43/434009.
ieee: J. R. Widawsky et al., “Measurement of voltage-dependent electronic
transport across amine-linked single-molecular-wire junctions,” Nanotechnology,
vol. 20, no. 43. IOP Publishing, 2009.
ista: Widawsky JR, Kamenetska M, Klare J, Nuckolls C, Steigerwald ML, Hybertsen
MS, Venkataraman L. 2009. Measurement of voltage-dependent electronic transport
across amine-linked single-molecular-wire junctions. Nanotechnology. 20(43), 434009.
mla: Widawsky, J. R., et al. “Measurement of Voltage-Dependent Electronic Transport
across Amine-Linked Single-Molecular-Wire Junctions.” Nanotechnology, vol.
20, no. 43, 434009, IOP Publishing, 2009, doi:10.1088/0957-4484/20/43/434009.
short: J.R. Widawsky, M. Kamenetska, J. Klare, C. Nuckolls, M.L. Steigerwald, M.S.
Hybertsen, L. Venkataraman, Nanotechnology 20 (2009).
date_created: 2024-09-09T13:49:43Z
date_published: 2009-10-02T00:00:00Z
date_updated: 2025-01-03T10:12:29Z
day: '02'
doi: 10.1088/0957-4484/20/43/434009
extern: '1'
external_id:
pmid:
- '19801764'
intvolume: ' 20'
issue: '43'
language:
- iso: eng
month: '10'
oa_version: None
pmid: 1
publication: Nanotechnology
publication_identifier:
eissn:
- 1361-6528
issn:
- 0957-4484
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: Measurement of voltage-dependent electronic transport across amine-linked single-molecular-wire
junctions
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 20
year: '2009'
...
---
OA_type: closed access
_id: '18029'
abstract:
- lang: eng
text: We compare the conductance of 1,4-bis(methylthio)benzene with that of 2,3,6,7-tetrahydrobenzo[1,2-b:4,5-b′]dithiophene
and the conductance of 1,4-bis(methylseleno)benzene with that of 2,3,6,7-tetrahydrobenzo[1,2-b:4,5-b′]diselenophene
and show explicitly that the orientation of an Au−S or Au−Se bond relative to
the aromatic π system controls electron transport through conjugated molecules.
Specifically, we have found that the conduction pathway connects the Au electrodes
to the aromatic π-system via the chalcogen p lone pairs, and greater overlaps
among these components lead to higher conductivity through the molecular junction.
article_processing_charge: No
article_type: letter_note
author:
- first_name: Young S.
full_name: Park, Young S.
last_name: Park
- first_name: Jonathan R.
full_name: Widawsky, Jonathan R.
last_name: Widawsky
- first_name: Maria
full_name: Kamenetska, Maria
last_name: Kamenetska
- first_name: Michael L.
full_name: Steigerwald, Michael L.
last_name: Steigerwald
- first_name: Mark S.
full_name: Hybertsen, Mark S.
last_name: Hybertsen
- first_name: Colin
full_name: Nuckolls, Colin
last_name: Nuckolls
- first_name: Latha
full_name: Venkataraman, Latha
id: 9ebb78a5-cc0d-11ee-8322-fae086a32caf
last_name: Venkataraman
orcid: 0000-0002-6957-6089
citation:
ama: Park YS, Widawsky JR, Kamenetska M, et al. Frustrated rotations in single-molecule
junctions. Journal of the American Chemical Society. 2009;131(31):10820-10821.
doi:10.1021/ja903731m
apa: Park, Y. S., Widawsky, J. R., Kamenetska, M., Steigerwald, M. L., Hybertsen,
M. S., Nuckolls, C., & Venkataraman, L. (2009). Frustrated rotations in single-molecule
junctions. Journal of the American Chemical Society. American Chemical
Society. https://doi.org/10.1021/ja903731m
chicago: Park, Young S., Jonathan R. Widawsky, Maria Kamenetska, Michael L. Steigerwald,
Mark S. Hybertsen, Colin Nuckolls, and Latha Venkataraman. “Frustrated Rotations
in Single-Molecule Junctions.” Journal of the American Chemical Society.
American Chemical Society, 2009. https://doi.org/10.1021/ja903731m.
ieee: Y. S. Park et al., “Frustrated rotations in single-molecule junctions,”
Journal of the American Chemical Society, vol. 131, no. 31. American Chemical
Society, pp. 10820–10821, 2009.
ista: Park YS, Widawsky JR, Kamenetska M, Steigerwald ML, Hybertsen MS, Nuckolls
C, Venkataraman L. 2009. Frustrated rotations in single-molecule junctions. Journal
of the American Chemical Society. 131(31), 10820–10821.
mla: Park, Young S., et al. “Frustrated Rotations in Single-Molecule Junctions.”
Journal of the American Chemical Society, vol. 131, no. 31, American Chemical
Society, 2009, pp. 10820–21, doi:10.1021/ja903731m.
short: Y.S. Park, J.R. Widawsky, M. Kamenetska, M.L. Steigerwald, M.S. Hybertsen,
C. Nuckolls, L. Venkataraman, Journal of the American Chemical Society 131 (2009)
10820–10821.
date_created: 2024-09-09T13:51:45Z
date_published: 2009-07-17T00:00:00Z
date_updated: 2025-01-03T10:14:29Z
day: '17'
doi: 10.1021/ja903731m
extern: '1'
external_id:
pmid:
- '19722660'
intvolume: ' 131'
issue: '31'
language:
- iso: eng
month: '07'
oa_version: None
page: 10820-10821
pmid: 1
publication: Journal of the American Chemical Society
publication_identifier:
eissn:
- 1520-5126
issn:
- 0002-7863
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Frustrated rotations in single-molecule junctions
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 131
year: '2009'
...
---
OA_place: repository
OA_type: green
_id: '18030'
abstract:
- lang: eng
text: We analyze the formation and evolution statistics of single-molecule junctions
bonded to gold electrodes using amine, methyl sulfide, and dimethyl phosphine
link groups by measuring conductance as a function of junction elongation. For
each link, the maximum elongation and formation probability increase with molecular
length, strongly suggesting that processes other than just metal-molecule bond
breakage play a key role in junction evolution under stress. Density functional
theory calculations of adiabatic trajectories show sequences of atomic-scale changes
in junction structure, including shifts in the attachment point, that account
for the long conductance plateau lengths observed.
article_number: '126803'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: M.
full_name: Kamenetska, M.
last_name: Kamenetska
- first_name: M.
full_name: Koentopp, M.
last_name: Koentopp
- first_name: A. C.
full_name: Whalley, A. C.
last_name: Whalley
- first_name: Y. S.
full_name: Park, Y. S.
last_name: Park
- first_name: M. L.
full_name: Steigerwald, M. L.
last_name: Steigerwald
- first_name: C.
full_name: Nuckolls, C.
last_name: Nuckolls
- first_name: M. S.
full_name: Hybertsen, M. S.
last_name: Hybertsen
- first_name: Latha
full_name: Venkataraman, Latha
id: 9ebb78a5-cc0d-11ee-8322-fae086a32caf
last_name: Venkataraman
orcid: 0000-0002-6957-6089
citation:
ama: Kamenetska M, Koentopp M, Whalley AC, et al. Formation and evolution of single-molecule
junctions. Physical Review Letters. 2009;102(12). doi:10.1103/physrevlett.102.126803
apa: Kamenetska, M., Koentopp, M., Whalley, A. C., Park, Y. S., Steigerwald, M.
L., Nuckolls, C., … Venkataraman, L. (2009). Formation and evolution of single-molecule
junctions. Physical Review Letters. American Physical Society. https://doi.org/10.1103/physrevlett.102.126803
chicago: Kamenetska, M., M. Koentopp, A. C. Whalley, Y. S. Park, M. L. Steigerwald,
C. Nuckolls, M. S. Hybertsen, and Latha Venkataraman. “Formation and Evolution
of Single-Molecule Junctions.” Physical Review Letters. American Physical
Society, 2009. https://doi.org/10.1103/physrevlett.102.126803.
ieee: M. Kamenetska et al., “Formation and evolution of single-molecule junctions,”
Physical Review Letters, vol. 102, no. 12. American Physical Society, 2009.
ista: Kamenetska M, Koentopp M, Whalley AC, Park YS, Steigerwald ML, Nuckolls C,
Hybertsen MS, Venkataraman L. 2009. Formation and evolution of single-molecule
junctions. Physical Review Letters. 102(12), 126803.
mla: Kamenetska, M., et al. “Formation and Evolution of Single-Molecule Junctions.”
Physical Review Letters, vol. 102, no. 12, 126803, American Physical Society,
2009, doi:10.1103/physrevlett.102.126803.
short: M. Kamenetska, M. Koentopp, A.C. Whalley, Y.S. Park, M.L. Steigerwald, C.
Nuckolls, M.S. Hybertsen, L. Venkataraman, Physical Review Letters 102 (2009).
date_created: 2024-09-09T13:52:37Z
date_published: 2009-03-24T00:00:00Z
date_updated: 2025-01-03T10:17:01Z
day: '24'
doi: 10.1103/physrevlett.102.126803
extern: '1'
external_id:
arxiv:
- '0901.1134'
pmid:
- '19392306'
intvolume: ' 102'
issue: '12'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/0901.1134
month: '03'
oa: 1
oa_version: Preprint
pmid: 1
publication: Physical Review Letters
publication_identifier:
eissn:
- 1079-7114
issn:
- 0031-9007
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Formation and evolution of single-molecule junctions
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 102
year: '2009'
...