---
_id: '978'
abstract:
- lang: eng
text: The newly discovered topological crystalline insulators feature a complex
band structure involving multiple Dirac cones, and are potentially highly tunable
by external electric field, temperature or strain. Theoretically, it has been
predicted that the various Dirac cones, which are offset in energy and momentum,
might harbour vastly different orbital character. However, their orbital texture,
which is of immense importance in determining a variety of a materialâ €™ s properties
remains elusive. Here, we unveil the orbital texture of Pb 1â ̂'x Sn x Se, a prototypical
topological crystalline insulator. By using Fourier-transform scanning tunnelling
spectroscopy we measure the interference patterns produced by the scattering of
surface-state electrons. We discover that the intensity and energy dependences
of the Fourier transforms show distinct characteristics, which can be directly
attributed to orbital effects. Our experiments reveal a complex band topology
involving two Lifshitz transitions and establish the orbital nature of the Dirac
bands, which could provide an alternative pathway towards future quantum applications.
acknowledgement: V.M. gratefully acknowledges funding from the US Department of Energy,
Scanned Probe Division under Award Number DE-FG02-12ER46880 for the primary support
of I.Z. and Y.O. (experiments, data analysis and writing the paper) and NSF-ECCS-1232105
for the partial support of W.Z. and D.W. (data acquisition). Work at Massachusetts
Institute of Technology is supported by US Department of Energy, Office of Basic
Energy Sciences, Division of Materials Sciences and Engineering under Award DE-SC0010526
(L.F.), and NSF DMR 1104498 (M.S.). H.L. acknowledges the Singapore National Research
Foundation for support under NRF Award No. NRF-NRFF2013-03. The work at Northeastern
University is supported by the US Department of Energy grant number DE-FG02-07ER46352,
and benefited from Northeastern University’s Advanced Scientific Computation Center
(ASCC), theory support at the Advanced Light Source, Berkeley and the allocation
of time at the NERSC supercomputing centre through DOE grant number DE-AC02-05CH11231.
W-F.T. and C-Y.H. were supported by the NSC in Taiwan under Grant No. 102-2112-M-110-009.
W-F.T. also thanks C. Fang for useful discussions. Work at Princeton University
is supported by the US National Science Foundation Grant, NSF-DMR-1006492. F.C.
acknowledges the support provided by MOST-Taiwan under project number NSC-102-2119-M-002-004.
author:
- first_name: Ilija
full_name: Zeljkovic, Ilija
last_name: Zeljkovic
- first_name: Yoshinori
full_name: Okada, Yoshinori
last_name: Okada
- first_name: Chengyi
full_name: Huang, Chengyi
last_name: Huang
- first_name: Raman
full_name: Sankar, Raman
last_name: Sankar
- first_name: Daniel
full_name: Walkup, Daniel
last_name: Walkup
- first_name: Wenwen
full_name: Zhou, Wenwen
last_name: Zhou
- first_name: Maksym
full_name: Maksym Serbyn
id: 47809E7E-F248-11E8-B48F-1D18A9856A87
last_name: Serbyn
orcid: 0000-0002-2399-5827
- first_name: Fangcheng
full_name: Chou, Fangcheng
last_name: Chou
- first_name: Wei
full_name: Tsai, Wei-Feng
last_name: Tsai
- first_name: Hsin
full_name: Lin, Hsin
last_name: Lin
- first_name: Arun
full_name: Bansil, Arun
last_name: Bansil
- first_name: Liang
full_name: Fu, Liang
last_name: Fu
- first_name: Md
full_name: Hasan, Md Z
last_name: Hasan
- first_name: Vidya
full_name: Madhavan, Vidya
last_name: Madhavan
citation:
ama: Zeljkovic I, Okada Y, Huang C, et al. Mapping the unconventional orbital texture
in topological crystalline insulators. Nature Physics. 2014;10(8):572-577.
doi:10.1038/nphys3012
apa: Zeljkovic, I., Okada, Y., Huang, C., Sankar, R., Walkup, D., Zhou, W., … Madhavan,
V. (2014). Mapping the unconventional orbital texture in topological crystalline
insulators. Nature Physics. Nature Publishing Group. https://doi.org/10.1038/nphys3012
chicago: Zeljkovic, Ilija, Yoshinori Okada, Chengyi Huang, Raman Sankar, Daniel
Walkup, Wenwen Zhou, Maksym Serbyn, et al. “Mapping the Unconventional Orbital
Texture in Topological Crystalline Insulators.” Nature Physics. Nature
Publishing Group, 2014. https://doi.org/10.1038/nphys3012.
ieee: I. Zeljkovic et al., “Mapping the unconventional orbital texture in
topological crystalline insulators,” Nature Physics, vol. 10, no. 8. Nature
Publishing Group, pp. 572–577, 2014.
ista: Zeljkovic I, Okada Y, Huang C, Sankar R, Walkup D, Zhou W, Serbyn M, Chou
F, Tsai W, Lin H, Bansil A, Fu L, Hasan M, Madhavan V. 2014. Mapping the unconventional
orbital texture in topological crystalline insulators. Nature Physics. 10(8),
572–577.
mla: Zeljkovic, Ilija, et al. “Mapping the Unconventional Orbital Texture in Topological
Crystalline Insulators.” Nature Physics, vol. 10, no. 8, Nature Publishing
Group, 2014, pp. 572–77, doi:10.1038/nphys3012.
short: I. Zeljkovic, Y. Okada, C. Huang, R. Sankar, D. Walkup, W. Zhou, M. Serbyn,
F. Chou, W. Tsai, H. Lin, A. Bansil, L. Fu, M. Hasan, V. Madhavan, Nature Physics
10 (2014) 572–577.
date_created: 2018-12-11T11:49:30Z
date_published: 2014-08-01T00:00:00Z
date_updated: 2021-01-12T08:22:23Z
day: '01'
doi: 10.1038/nphys3012
extern: 1
intvolume: ' 10'
issue: '8'
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1312.0164
month: '08'
oa: 1
page: 572 - 577
publication: Nature Physics
publication_status: published
publisher: Nature Publishing Group
publist_id: '6423'
quality_controlled: 0
status: public
title: Mapping the unconventional orbital texture in topological crystalline insulators
type: journal_article
volume: 10
year: '2014'
...
---
_id: '979'
abstract:
- lang: eng
text: In the recently discovered topological crystalline insulators SnTe and Pb1-xSnx(Te,
Se), crystal symmetry and electronic topology intertwine to create topological
surface states with many interesting features including Lifshitz transition, Van-Hove
singularity, and fermion mass generation. These surface states are protected by
mirror symmetry with respect to the (110) plane. In this work we present a comprehensive
study of the effects of different mirror-symmetry-breaking perturbations on the
(001) surface band structure. Pristine (001) surface states have four branches
of Dirac fermions at low energy. We show that ferroelectric-type structural distortion
generates a mass and gaps out some or all of these Dirac points, while strain
shifts Dirac points in the Brillouin zone. An in-plane magnetic field leaves the
surface state gapless, but introduces asymmetry between Dirac points. Finally,
an out-of-plane magnetic field leads to discrete Landau levels. We show that the
Landau level spectrum has an unusual pattern of degeneracy and interesting features
due to the unique underlying band structure. This suggests that Landau level spectroscopy
can detect and distinguish between different mechanisms of symmetry breaking in
topological crystalline insulators.
acknowledgement: We thank V. Madhavan and Y. Okada for related collaborations, and
P. A. Lee for discussions. M.S. was supported by P. A. Lee via Grant No. NSF DMR
1104498. L.F. is supported by the DOE Office of Basic Energy Sciences, Division
of Materials Sciences and Engineering under award DE-SC0010526.
author:
- first_name: Maksym
full_name: Maksym Serbyn
id: 47809E7E-F248-11E8-B48F-1D18A9856A87
last_name: Serbyn
orcid: 0000-0002-2399-5827
- first_name: Liang
full_name: Fu, Liang
last_name: Fu
citation:
ama: Serbyn M, Fu L. Symmetry breaking and Landau quantization in topological crystalline
insulators. Physical Review B - Condensed Matter and Materials Physics.
2014;90(3). doi:10.1103/PhysRevB.90.035402
apa: Serbyn, M., & Fu, L. (2014). Symmetry breaking and Landau quantization
in topological crystalline insulators. Physical Review B - Condensed Matter
and Materials Physics. American Physical Society. https://doi.org/10.1103/PhysRevB.90.035402
chicago: Serbyn, Maksym, and Liang Fu. “Symmetry Breaking and Landau Quantization
in Topological Crystalline Insulators.” Physical Review B - Condensed Matter
and Materials Physics. American Physical Society, 2014. https://doi.org/10.1103/PhysRevB.90.035402.
ieee: M. Serbyn and L. Fu, “Symmetry breaking and Landau quantization in topological
crystalline insulators,” Physical Review B - Condensed Matter and Materials
Physics, vol. 90, no. 3. American Physical Society, 2014.
ista: Serbyn M, Fu L. 2014. Symmetry breaking and Landau quantization in topological
crystalline insulators. Physical Review B - Condensed Matter and Materials Physics.
90(3).
mla: Serbyn, Maksym, and Liang Fu. “Symmetry Breaking and Landau Quantization in
Topological Crystalline Insulators.” Physical Review B - Condensed Matter and
Materials Physics, vol. 90, no. 3, American Physical Society, 2014, doi:10.1103/PhysRevB.90.035402.
short: M. Serbyn, L. Fu, Physical Review B - Condensed Matter and Materials Physics
90 (2014).
date_created: 2018-12-11T11:49:31Z
date_published: 2014-07-03T00:00:00Z
date_updated: 2021-01-12T08:22:23Z
day: '03'
doi: 10.1103/PhysRevB.90.035402
extern: 1
intvolume: ' 90'
issue: '3'
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1403.8153
month: '07'
oa: 1
publication: Physical Review B - Condensed Matter and Materials Physics
publication_status: published
publisher: American Physical Society
publist_id: '6422'
quality_controlled: 0
status: public
title: Symmetry breaking and Landau quantization in topological crystalline insulators
type: journal_article
volume: 90
year: '2014'
...
---
_id: '98'
abstract:
- lang: eng
text: Relaxation and dephasing of hole spins are measured in a gate-defined Ge/Si
nanowire double quantum dot using a fast pulsed-gate method and dispersive readout.
An inhomogeneous dephasing time T2* ∼ 0.18 μs exceeds corresponding measurements
in III-V semiconductors by more than an order of magnitude, as expected for predominately
nuclear-spin-free materials. Dephasing is observed to be exponential in time,
indicating the presence of a broadband noise source, rather than Gaussian, previously
seen in systems with nuclear-spin-dominated dephasing.
acknowledgement: Funding from the Department of Energy, Office of Science & SCGF,
the EC FP7-ICT project SiSPIN no. 323841, and the Danish National Research Foundation
is acknowledged.
arxiv: 1
author:
- first_name: Andrew P
full_name: Higginbotham, Andrew P
id: 4AD6785A-F248-11E8-B48F-1D18A9856A87
last_name: Higginbotham
orcid: 0000-0003-2607-2363
- first_name: Thorvald
full_name: Larsen, Thorvald
last_name: Larsen
- first_name: Jun
full_name: Yao, Jun
last_name: Yao
- first_name: Hao
full_name: Yan, Hao
last_name: Yan
- first_name: Charles
full_name: Lieber, Charles
last_name: Lieber
- first_name: Charles
full_name: Marcus, Charles
last_name: Marcus
- first_name: Ferdinand
full_name: Kuemmeth, Ferdinand
last_name: Kuemmeth
citation:
ama: Higginbotham AP, Larsen T, Yao J, et al. Hole spin coherence in a Ge/Si heterostructure
nanowire. Nano Letters. 2014;14(6):3582-3586. doi:10.1021/nl501242b
apa: Higginbotham, A. P., Larsen, T., Yao, J., Yan, H., Lieber, C., Marcus, C.,
& Kuemmeth, F. (2014). Hole spin coherence in a Ge/Si heterostructure nanowire.
Nano Letters. American Chemical Society. https://doi.org/10.1021/nl501242b
chicago: Higginbotham, Andrew P, Thorvald Larsen, Jun Yao, Hao Yan, Charles Lieber,
Charles Marcus, and Ferdinand Kuemmeth. “Hole Spin Coherence in a Ge/Si Heterostructure
Nanowire.” Nano Letters. American Chemical Society, 2014. https://doi.org/10.1021/nl501242b.
ieee: A. P. Higginbotham et al., “Hole spin coherence in a Ge/Si heterostructure
nanowire,” Nano Letters, vol. 14, no. 6. American Chemical Society, pp.
3582–3586, 2014.
ista: Higginbotham AP, Larsen T, Yao J, Yan H, Lieber C, Marcus C, Kuemmeth F. 2014.
Hole spin coherence in a Ge/Si heterostructure nanowire. Nano Letters. 14(6),
3582–3586.
mla: Higginbotham, Andrew P., et al. “Hole Spin Coherence in a Ge/Si Heterostructure
Nanowire.” Nano Letters, vol. 14, no. 6, American Chemical Society, 2014,
pp. 3582–86, doi:10.1021/nl501242b.
short: A.P. Higginbotham, T. Larsen, J. Yao, H. Yan, C. Lieber, C. Marcus, F. Kuemmeth,
Nano Letters 14 (2014) 3582–3586.
date_created: 2018-12-11T11:44:37Z
date_published: 2014-05-05T00:00:00Z
date_updated: 2021-01-12T08:22:24Z
day: '05'
doi: 10.1021/nl501242b
extern: '1'
external_id:
arxiv:
- '1403.2093'
intvolume: ' 14'
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1403.2093
month: '05'
oa: 1
oa_version: Preprint
page: 3582 - 3586
publication: Nano Letters
publication_status: published
publisher: American Chemical Society
publist_id: '7956'
quality_controlled: '1'
status: public
title: Hole spin coherence in a Ge/Si heterostructure nanowire
type: journal_article
user_id: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87
volume: 14
year: '2014'
...
---
_id: '980'
abstract:
- lang: eng
text: Many-body localized (MBL) systems are characterized by the absence of transport
and thermalization and, therefore, cannot be described by conventional statistical
mechanics. In this paper, using analytic arguments and numerical simulations,
we study the behavior of local observables in an isolated MBL system following
a quantum quench. For the case of a global quench, we find that the local observables
reach stationary, highly nonthermal values at long times as a result of slow dephasing
characteristic of the MBL phase. These stationary values retain the local memory
of the initial state due to the existence of local integrals of motion in the
MBL phase. The temporal fluctuations around stationary values exhibit universal
power-law decay in time, with an exponent set by the localization length and the
diagonal entropy of the initial state. Such a power-law decay holds for any local
observable and is related to the logarithmic in time growth of entanglement in
the MBL phase. This behavior distinguishes the MBL phase from both the Anderson
insulator (where no stationary state is reached) and from the ergodic phase (where
relaxation is expected to be exponential). For the case of a local quench, we
also find a power-law approach of local observables to their stationary values
when the system is prepared in a mixed state. Quench protocols considered in this
paper can be naturally implemented in systems of ultracold atoms in disordered
optical lattices, and the behavior of local observables provides a direct experimental
signature of many-body localization.
acknowledgement: Research at Perimeter Institute is supported by the Government of
Canada through Industry Canada and by the Province of Ontario through the Ministry
of Economic Development & Innovation. We acknowledge support by NSERC Discovery
Grant (D.A.).
author:
- first_name: Maksym
full_name: Maksym Serbyn
id: 47809E7E-F248-11E8-B48F-1D18A9856A87
last_name: Serbyn
orcid: 0000-0002-2399-5827
- first_name: Zlatko
full_name: Papić, Zlatko
last_name: Papić
- first_name: Dmitry
full_name: Abanin, Dmitry A
last_name: Abanin
citation:
ama: Serbyn M, Papić Z, Abanin D. Quantum quenches in the many-body localized phase.
Physical Review B - Condensed Matter and Materials Physics. 2014;90(17).
doi:10.1103/PhysRevB.90.174302
apa: Serbyn, M., Papić, Z., & Abanin, D. (2014). Quantum quenches in the many-body
localized phase. Physical Review B - Condensed Matter and Materials Physics.
American Physical Society. https://doi.org/10.1103/PhysRevB.90.174302
chicago: Serbyn, Maksym, Zlatko Papić, and Dmitry Abanin. “Quantum Quenches in the
Many-Body Localized Phase.” Physical Review B - Condensed Matter and Materials
Physics. American Physical Society, 2014. https://doi.org/10.1103/PhysRevB.90.174302.
ieee: M. Serbyn, Z. Papić, and D. Abanin, “Quantum quenches in the many-body localized
phase,” Physical Review B - Condensed Matter and Materials Physics, vol.
90, no. 17. American Physical Society, 2014.
ista: Serbyn M, Papić Z, Abanin D. 2014. Quantum quenches in the many-body localized
phase. Physical Review B - Condensed Matter and Materials Physics. 90(17).
mla: Serbyn, Maksym, et al. “Quantum Quenches in the Many-Body Localized Phase.”
Physical Review B - Condensed Matter and Materials Physics, vol. 90, no.
17, American Physical Society, 2014, doi:10.1103/PhysRevB.90.174302.
short: M. Serbyn, Z. Papić, D. Abanin, Physical Review B - Condensed Matter and
Materials Physics 90 (2014).
date_created: 2018-12-11T11:49:31Z
date_published: 2014-11-06T00:00:00Z
date_updated: 2021-01-12T08:22:24Z
day: '06'
doi: 10.1103/PhysRevB.90.174302
extern: 1
intvolume: ' 90'
issue: '17'
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1408.4105
month: '11'
oa: 1
publication: Physical Review B - Condensed Matter and Materials Physics
publication_status: published
publisher: American Physical Society
publist_id: '6420'
quality_controlled: 0
status: public
title: Quantum quenches in the many-body localized phase
type: journal_article
volume: 90
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: 2023-02-23T10:27:38Z
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: 2023-02-23T14:13:27Z
day: '03'
department:
- _id: CaGu
doi: 10.1111/evo.12373
external_id:
pmid:
- '24495000'
intvolume: ' 68'
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: 6785fbc1-c503-11eb-8a32-93094b40e1cf
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: 2023-02-23T14:13:24Z
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'
...
---
_id: '348'
abstract:
- lang: eng
text: "Bi2S3-xTex bulk nanocomposites with crystal domain sizes in the range from
50 nm to 100 nm were obtained from the reaction of Bi2S3 nanorods with Te powder.
The thermoelectric properties of the obtained nanocomposites were analysed in
the temperature range from 0°C to 300°C. We observed how the thermoelectric properties
of the material improved with the annealing temperature, being a spark plasma
sintering process needed to maintain the material nanostructuration while maximising
its electrical properties. Finally thermoelectric dimensionless figures of merit
ZT up to 0.42 were obtained before any charge carrier concentration optimisation.
Copyright © 2014 Inderscience Enterprises Ltd.\r\n\r\n"
article_processing_charge: No
article_type: original
author:
- first_name: Doris
full_name: Cadavid, Doris
last_name: Cadavid
- first_name: Maria
full_name: Ibáñez, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibáñez
orcid: 0000-0001-5013-2843
- first_name: Umberto
full_name: Anselmi Tamburini, Umberto
last_name: Anselmi Tamburini
- first_name: Oscar
full_name: Durá, Oscar
last_name: Durá
- first_name: Marco
full_name: De La Torre, Marco
last_name: De La Torre
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: Cadavid D, Ibáñez M, Anselmi Tamburini U, Durá O, De La Torre M, Cabot A. Thermoelectric
properties of bottom up assembled Bi2S 3-xTex nanocomposites. International
Journal of Nanotechnology. 2014;11(9-11):773-784. doi:10.1504/IJNT.2014.063787
apa: Cadavid, D., Ibáñez, M., Anselmi Tamburini, U., Durá, O., De La Torre, M.,
& Cabot, A. (2014). Thermoelectric properties of bottom up assembled Bi2S
3-xTex nanocomposites. International Journal of Nanotechnology. Inderscience
Enterprises Limited . https://doi.org/10.1504/IJNT.2014.063787
chicago: Cadavid, Doris, Maria Ibáñez, Umberto Anselmi Tamburini, Oscar Durá, Marco
De La Torre, and Andreu Cabot. “Thermoelectric Properties of Bottom up Assembled
Bi2S 3-XTex Nanocomposites.” International Journal of Nanotechnology. Inderscience
Enterprises Limited , 2014. https://doi.org/10.1504/IJNT.2014.063787.
ieee: D. Cadavid, M. Ibáñez, U. Anselmi Tamburini, O. Durá, M. De La Torre, and
A. Cabot, “Thermoelectric properties of bottom up assembled Bi2S 3-xTex nanocomposites,”
International Journal of Nanotechnology, vol. 11, no. 9–11. Inderscience
Enterprises Limited , pp. 773–784, 2014.
ista: Cadavid D, Ibáñez M, Anselmi Tamburini U, Durá O, De La Torre M, Cabot A.
2014. Thermoelectric properties of bottom up assembled Bi2S 3-xTex nanocomposites.
International Journal of Nanotechnology. 11(9–11), 773–784.
mla: Cadavid, Doris, et al. “Thermoelectric Properties of Bottom up Assembled Bi2S
3-XTex Nanocomposites.” International Journal of Nanotechnology, vol. 11,
no. 9–11, Inderscience Enterprises Limited , 2014, pp. 773–84, doi:10.1504/IJNT.2014.063787.
short: D. Cadavid, M. Ibáñez, U. Anselmi Tamburini, O. Durá, M. De La Torre, A.
Cabot, International Journal of Nanotechnology 11 (2014) 773–784.
date_created: 2018-12-11T11:45:57Z
date_published: 2014-01-01T00:00:00Z
date_updated: 2021-01-12T07:43:44Z
day: '01'
doi: 10.1504/IJNT.2014.063787
extern: '1'
intvolume: ' 11'
issue: 9-11
language:
- iso: eng
month: '01'
oa_version: None
page: 773 - 784
publication: International Journal of Nanotechnology
publication_status: published
publisher: 'Inderscience Enterprises Limited '
publist_id: '7476'
quality_controlled: '1'
status: public
title: Thermoelectric properties of bottom up assembled Bi2S 3-xTex nanocomposites
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 11
year: '2014'
...
---
_id: '349'
abstract:
- lang: eng
text: 'Thermoelectricity is a key technology with the potential to improve the efficiency
of energy conversion processes, which may strongly benefit from advances in the
field of nanotechnology. Nanostructured materials are very appealing for thermoelectric
applications, but the full development of their potential requires precise control
of their properties at the nanoscale. Bottom-up assembly of nanoparticles provides
access to a three-dimensional composition control at the nanoscale not attainable
in any other technology. In particular, colloidal nanoheterostructures are especially
interesting building blocks for the bottom-up production of functional nanomaterials.
In the present work, we use PbTe@PbS core-shell nanoparticles as building blocks
for the bottom-up production of PbTe-PbS nanocomposites. We used a ligand exchange
strategy and a hot press process to promote the electrical conductivity of the
nanocomposite and to increase its density. These two approaches allowed us to
improve the performance of bottom-up assembled PbTe-PbS bulk nanostructured materials. '
article_processing_charge: No
article_type: original
author:
- first_name: Silvia
full_name: Ortega, Silvia
last_name: Ortega
- first_name: Maria
full_name: Ibáñez, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibáñez
orcid: 0000-0001-5013-2843
- first_name: Doris
full_name: Cadavid, Doris
last_name: Cadavid
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: Ortega S, Ibáñez M, Cadavid D, Cabot A. Bottom up processing of PbTe PbS thermoelectric
nanocomposites. International Journal of Nanotechnology. 2014;11(9-11):955-970.
doi:10.1504/IJNT.2014.063802
apa: Ortega, S., Ibáñez, M., Cadavid, D., & Cabot, A. (2014). Bottom up processing
of PbTe PbS thermoelectric nanocomposites. International Journal of Nanotechnology.
Inderscience Enterprises Limited . https://doi.org/10.1504/IJNT.2014.063802
chicago: Ortega, Silvia, Maria Ibáñez, Doris Cadavid, and Andreu Cabot. “Bottom
up Processing of PbTe PbS Thermoelectric Nanocomposites.” International Journal
of Nanotechnology. Inderscience Enterprises Limited , 2014. https://doi.org/10.1504/IJNT.2014.063802.
ieee: S. Ortega, M. Ibáñez, D. Cadavid, and A. Cabot, “Bottom up processing of PbTe
PbS thermoelectric nanocomposites,” International Journal of Nanotechnology,
vol. 11, no. 9–11. Inderscience Enterprises Limited , pp. 955–970, 2014.
ista: Ortega S, Ibáñez M, Cadavid D, Cabot A. 2014. Bottom up processing of PbTe
PbS thermoelectric nanocomposites. International Journal of Nanotechnology. 11(9–11),
955–970.
mla: Ortega, Silvia, et al. “Bottom up Processing of PbTe PbS Thermoelectric Nanocomposites.”
International Journal of Nanotechnology, vol. 11, no. 9–11, Inderscience
Enterprises Limited , 2014, pp. 955–70, doi:10.1504/IJNT.2014.063802.
short: S. Ortega, M. Ibáñez, D. Cadavid, A. Cabot, International Journal of Nanotechnology
11 (2014) 955–970.
date_created: 2018-12-11T11:45:57Z
date_published: 2014-07-21T00:00:00Z
date_updated: 2021-01-12T07:43:48Z
day: '21'
doi: 10.1504/IJNT.2014.063802
extern: '1'
intvolume: ' 11'
issue: 9-11
language:
- iso: eng
month: '07'
oa_version: None
page: 955 - 970
publication: International Journal of Nanotechnology
publication_status: published
publisher: 'Inderscience Enterprises Limited '
publist_id: '7477'
quality_controlled: '1'
status: public
title: Bottom up processing of PbTe PbS thermoelectric nanocomposites
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 11
year: '2014'
...
---
_id: '350'
abstract:
- lang: eng
text: Herein, a colloidal synthetic route to produce highly monodisperse Cu2HgGeSe4
(CHGSe) nanoparticles (NPs) is presented in detail. The high yield of the developed
procedure allowed the production of CHGSe NPs at the gram scale. A thorough analysis
of their structural and optical properties is shown. CHGSe NPs displayed poly-tetrahedral
morphology and narrow size distributions with average size in the range of 10–40
nm and size dispersions below 10 %. A 1.6 eV optical band gap was measured by
mean of UV–Vis. By adjusting the cation ratio, an effective control of their electrical
conductivity is achieved. The prepared NPs are used as building blocks for the
production of CHGSe bulk nanostructured materials. The thermoelectric properties
of CHGSe nanomaterials are studied in the temperature range from 300 to 730 K.
CHGSe nanomaterials reached electrical conductivities up to 5 × 104 S m−1, Seebeck
coefficients above 100 μV K−1, and thermal conductivities below 1.0 W m−1 K−1
which translated into thermoelectric figures of merit up to 0.34 at 730 K.
acknowledgement: The research was supported by the European Regional Development Funds
(ERDF, ‘‘FEDER Programa Competitivitat de Catalunya 2007–2013’’).
article_processing_charge: No
article_type: original
author:
- first_name: Wenhua
full_name: Li, Wenhua
last_name: Li
- first_name: Maria
full_name: Ibáñez, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibáñez
orcid: 0000-0001-5013-2843
- first_name: Doris
full_name: Cadavid, Doris
last_name: Cadavid
- first_name: Reza
full_name: Zamani, Reza
last_name: Zamani
- first_name: Javier
full_name: Rubio Garcia, Javier
last_name: Rubio Garcia
- first_name: Stéphane
full_name: Gorsse, Stéphane
last_name: Gorsse
- first_name: Joan
full_name: Morante, Joan
last_name: Morante
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: 'Li W, Ibáñez M, Cadavid D, et al. Colloidal synthesis and functional properties
of quaternary Cu based semiconductors: Cu2HgGeSe4. Journal of Nanoparticle
Research. 2014;16(3). doi:10.1007/s11051-014-2297-2'
apa: 'Li, W., Ibáñez, M., Cadavid, D., Zamani, R., Rubio Garcia, J., Gorsse, S.,
… Cabot, A. (2014). Colloidal synthesis and functional properties of quaternary
Cu based semiconductors: Cu2HgGeSe4. Journal of Nanoparticle Research.
Kluwer. https://doi.org/10.1007/s11051-014-2297-2'
chicago: 'Li, Wenhua, Maria Ibáñez, Doris Cadavid, Reza Zamani, Javier Rubio Garcia,
Stéphane Gorsse, Joan Morante, Jordi Arbiol, and Andreu Cabot. “Colloidal Synthesis
and Functional Properties of Quaternary Cu Based Semiconductors: Cu2HgGeSe4.”
Journal of Nanoparticle Research. Kluwer, 2014. https://doi.org/10.1007/s11051-014-2297-2.'
ieee: 'W. Li et al., “Colloidal synthesis and functional properties of quaternary
Cu based semiconductors: Cu2HgGeSe4,” Journal of Nanoparticle Research,
vol. 16, no. 3. Kluwer, 2014.'
ista: 'Li W, Ibáñez M, Cadavid D, Zamani R, Rubio Garcia J, Gorsse S, Morante J,
Arbiol J, Cabot A. 2014. Colloidal synthesis and functional properties of quaternary
Cu based semiconductors: Cu2HgGeSe4. Journal of Nanoparticle Research. 16(3).'
mla: 'Li, Wenhua, et al. “Colloidal Synthesis and Functional Properties of Quaternary
Cu Based Semiconductors: Cu2HgGeSe4.” Journal of Nanoparticle Research,
vol. 16, no. 3, Kluwer, 2014, doi:10.1007/s11051-014-2297-2.'
short: W. Li, M. Ibáñez, D. Cadavid, R. Zamani, J. Rubio Garcia, S. Gorsse, J. Morante,
J. Arbiol, A. Cabot, Journal of Nanoparticle Research 16 (2014).
date_created: 2018-12-11T11:45:58Z
date_published: 2014-02-18T00:00:00Z
date_updated: 2021-01-12T07:43:53Z
day: '18'
doi: 10.1007/s11051-014-2297-2
extern: '1'
intvolume: ' 16'
issue: '3'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://hal.archives-ouvertes.fr/hal-00959322/
month: '02'
oa: 1
oa_version: Submitted Version
publication: Journal of Nanoparticle Research
publication_status: published
publisher: Kluwer
publist_id: '7478'
quality_controlled: '1'
status: public
title: 'Colloidal synthesis and functional properties of quaternary Cu based semiconductors:
Cu2HgGeSe4'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 16
year: '2014'
...
---
_id: '355'
abstract:
- lang: eng
text: 'We report on the photocatalytic hydrogen evolution under full-arc light irradiation
of CuIn1-xGaxS2 wurtzite nanocrystals in the presence of SO3 2- and S2- as sacrificial
reagents. We analyzed the hydrogen generation rate as a function of the Ga content
and associated it with the energy band positions. For photocatalytic water splitting,
the CuInS2 bandgap is slightly too low to efficiently overcome the reaction over-potential.
The presence of Ga shifts up the CuInS2 conduction band edge providing a larger
driving force for photogenerated carriers to activate the water splitting reduction
reaction. The larger the Ga content, the more energetically favorable the electron
injection, and thus a more efficient use of the photogenerated carriers is reached.
However, the band gap increase associated with the Ga incorporation reduces the
concentration of photogenerated carriers available for water splitting, and consequently
a lower hydrogen conversion rate is obtained for very high Ga contents. The optimum
Ga concentration was experimentally found at CuIn0.3Ga0.7S2. '
acknowledgement: "The research was supported by the European Regional Development\r\nFunds
(ERDF, “FEDER Programa Competitivitat de\r\nCatalunya 2007-2013”) and the Framework
7 program under\r\nproject SCALENANO (FP7-NMP-ENERGY-2011-284486)."
article_processing_charge: No
article_type: original
author:
- first_name: Xuelian
full_name: Yu, Xuelian
last_name: Yu
- first_name: Xiaoqiang
full_name: An, Xiaoqiang
last_name: An
- first_name: Alexey
full_name: Shavel, Alexey
last_name: Shavel
- first_name: Maria
full_name: Ibáñez, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibáñez
orcid: 0000-0001-5013-2843
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: Yu X, An X, Shavel A, Ibáñez M, Cabot A. The effect of the Ga content on the
photocatalytic hydrogen evolution of CuIn1-xGaxS2 nanocrystals. Journal of
Materials Chemistry A. 2014;2(31):12317-12322. doi:10.1039/c4ta01315h
apa: Yu, X., An, X., Shavel, A., Ibáñez, M., & Cabot, A. (2014). The effect
of the Ga content on the photocatalytic hydrogen evolution of CuIn1-xGaxS2 nanocrystals.
Journal of Materials Chemistry A. Royal Society of Chemistry. https://doi.org/10.1039/c4ta01315h
chicago: Yu, Xuelian, Xiaoqiang An, Alexey Shavel, Maria Ibáñez, and Andreu Cabot.
“The Effect of the Ga Content on the Photocatalytic Hydrogen Evolution of CuIn1-XGaxS2
Nanocrystals.” Journal of Materials Chemistry A. Royal Society of Chemistry,
2014. https://doi.org/10.1039/c4ta01315h.
ieee: X. Yu, X. An, A. Shavel, M. Ibáñez, and A. Cabot, “The effect of the Ga content
on the photocatalytic hydrogen evolution of CuIn1-xGaxS2 nanocrystals,” Journal
of Materials Chemistry A, vol. 2, no. 31. Royal Society of Chemistry, pp.
12317–12322, 2014.
ista: Yu X, An X, Shavel A, Ibáñez M, Cabot A. 2014. The effect of the Ga content
on the photocatalytic hydrogen evolution of CuIn1-xGaxS2 nanocrystals. Journal
of Materials Chemistry A. 2(31), 12317–12322.
mla: Yu, Xuelian, et al. “The Effect of the Ga Content on the Photocatalytic Hydrogen
Evolution of CuIn1-XGaxS2 Nanocrystals.” Journal of Materials Chemistry A,
vol. 2, no. 31, Royal Society of Chemistry, 2014, pp. 12317–22, doi:10.1039/c4ta01315h.
short: X. Yu, X. An, A. Shavel, M. Ibáñez, A. Cabot, Journal of Materials Chemistry
A 2 (2014) 12317–12322.
date_created: 2018-12-11T11:45:59Z
date_published: 2014-08-21T00:00:00Z
date_updated: 2021-01-12T07:44:14Z
day: '21'
doi: 10.1039/c4ta01315h
extern: '1'
intvolume: ' 2'
issue: '31'
language:
- iso: eng
month: '08'
oa_version: None
page: 12317 - 12322
publication: Journal of Materials Chemistry A
publication_status: published
publisher: Royal Society of Chemistry
publist_id: '7471'
quality_controlled: '1'
status: public
title: The effect of the Ga content on the photocatalytic hydrogen evolution of CuIn1-xGaxS2
nanocrystals
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 2
year: '2014'
...
---
_id: '356'
abstract:
- lang: eng
text: Cu2ZnSnS4, based on abundant and environmental friendly elements and with
a direct band gap of 1.5 eV, is a main candidate material for solar energy conversion
through both photovoltaics and photocatalysis. We detail here the synthesis of
quasi-spherical Cu 2ZnSnS4 nanoparticles with unprecedented narrow size distributions.
We further detail their use as seeds to produce CZTS-Au and CZTS-Pt heterostructured
nanoparticles. Such heterostructured nanoparticles are shown to have excellent
photocatalytic properties toward degradation of Rhodamine B and hydrogen generation
by water splitting.
acknowledgement: This work was supported by the European Regional Development Funds
and the Framework 7 program under project SCALENANO (FP7-NMP-ENERGY-2011-284486).
article_processing_charge: No
article_type: original
author:
- first_name: Xuelian
full_name: Yu, Xuelian
last_name: Yu
- first_name: Alexey
full_name: Shavel, Alexey
last_name: Shavel
- first_name: Xiaoqiang
full_name: An, Xiaoqiang
last_name: An
- first_name: Zhishan
full_name: Luo, Zhishan
last_name: Luo
- first_name: Maria
full_name: Ibáñez, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibáñez
orcid: 0000-0001-5013-2843
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
citation:
ama: Yu X, Shavel A, An X, Luo Z, Ibáñez M, Cabot A. Cu2ZnSnS4-Pt and Cu2ZnSnS4-Au
heterostructured nanoparticles for photocatalytic water splitting and pollutant
degradation. Journal of the American Chemical Society. 2014;136(26):9236-9239.
doi:10.1021/ja502076b
apa: Yu, X., Shavel, A., An, X., Luo, Z., Ibáñez, M., & Cabot, A. (2014). Cu2ZnSnS4-Pt
and Cu2ZnSnS4-Au heterostructured nanoparticles for photocatalytic water splitting
and pollutant degradation. Journal of the American Chemical Society. American
Chemical Society. https://doi.org/10.1021/ja502076b
chicago: Yu, Xuelian, Alexey Shavel, Xiaoqiang An, Zhishan Luo, Maria Ibáñez, and
Andreu Cabot. “Cu2ZnSnS4-Pt and Cu2ZnSnS4-Au Heterostructured Nanoparticles for
Photocatalytic Water Splitting and Pollutant Degradation.” Journal of the American
Chemical Society. American Chemical Society, 2014. https://doi.org/10.1021/ja502076b.
ieee: X. Yu, A. Shavel, X. An, Z. Luo, M. Ibáñez, and A. Cabot, “Cu2ZnSnS4-Pt and
Cu2ZnSnS4-Au heterostructured nanoparticles for photocatalytic water splitting
and pollutant degradation,” Journal of the American Chemical Society, vol.
136, no. 26. American Chemical Society, pp. 9236–9239, 2014.
ista: Yu X, Shavel A, An X, Luo Z, Ibáñez M, Cabot A. 2014. Cu2ZnSnS4-Pt and Cu2ZnSnS4-Au
heterostructured nanoparticles for photocatalytic water splitting and pollutant
degradation. Journal of the American Chemical Society. 136(26), 9236–9239.
mla: Yu, Xuelian, et al. “Cu2ZnSnS4-Pt and Cu2ZnSnS4-Au Heterostructured Nanoparticles
for Photocatalytic Water Splitting and Pollutant Degradation.” Journal of the
American Chemical Society, vol. 136, no. 26, American Chemical Society, 2014,
pp. 9236–39, doi:10.1021/ja502076b.
short: X. Yu, A. Shavel, X. An, Z. Luo, M. Ibáñez, A. Cabot, Journal of the American
Chemical Society 136 (2014) 9236–9239.
date_created: 2018-12-11T11:46:00Z
date_published: 2014-07-02T00:00:00Z
date_updated: 2021-01-12T07:44:18Z
day: '02'
doi: 10.1021/ja502076b
extern: '1'
intvolume: ' 136'
issue: '26'
language:
- iso: eng
month: '07'
oa_version: None
page: 9236 - 9239
publication: Journal of the American Chemical Society
publication_status: published
publisher: American Chemical Society
publist_id: '7472'
quality_controlled: '1'
status: public
title: Cu2ZnSnS4-Pt and Cu2ZnSnS4-Au heterostructured nanoparticles for photocatalytic
water splitting and pollutant degradation
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 136
year: '2014'
...
---
_id: '357'
abstract:
- lang: eng
text: 'Near-resonant Raman scattering measurements of zinc sulfide nanoparticles
and thin films have been made and correlated to grain and particle size, respectively,
using a 325 nm wavelength excitation source. The area ratios between the first,
second, and third order peaks of ZnS identified as the T 2(LO) mode decrease with
increasing ZnS grain size. This is an effect attributed to changes in the bandgap
energy from quantum confinement due to the varying grain size between the films/particles,
as noted by a shift in the room temperature photoluminescence emission corresponding
to the free exciton emission energy. While Raman scattering spectroscopy is typically
limited to identification of phases and their crystalline properties, it is possible
to attain more than such straightforward information by calibrating the spectral
features to variations between sets of samples. These results open the possibility
of making a quantitative grain size estimation in ZnS thin films and nanostructures,
as well as in other material systems where ZnS may be expected as a secondary
phase, such as Cu2ZnSnS4. Additionally, more commonly used excitation wavelengths
for Raman scattering, such as 514 and 532 nm, are shown to be of limited use in
characterizing ZnS thin films due to the extremely low Raman scattering efficiency
of ZnS in films with sub-micron thicknesses. '
acknowledgement: "This research was supported by the People Programme\r\n(Marie Curie
Actions) of the European Union's Seventh Framework\r\nProgramme under REA grant
agreement number 269167\r\n(PVICOKEST) and the Spanish Ministerio de Economía y\r\nCompetividad
(MINECO) under KEST-PV (ref. ENE2010-\r\n121541-C03-01/02). Authors from IREC belong
to the M-2E\r\n(Electronic Materials for Energy) Consolidated Research\r\nGroup
and the XaRMAE Network of Excellence on Materials\r\nfor Energy of the “Generalitat
de Catalunya”. A. Fairbrother\r\nthanks the MINECO for support via the FPU program\r\n(FPU12/05508),
V. Izquierdo for the Juan de la Cierva program\r\n(JCI-2011-10782), and E. Saucedo
for the Ramón y Cajal\r\nprogram (RYC-2011-09212)."
article_processing_charge: No
article_type: original
author:
- first_name: Andrew
full_name: Fairbrother, Andrew
last_name: Fairbrother
- first_name: Victor
full_name: Izquierdo Roca, Victor
last_name: Izquierdo Roca
- first_name: Xavier
full_name: Fontané, Xavier
last_name: Fontané
- first_name: Maria
full_name: Ibáñez, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibáñez
orcid: 0000-0001-5013-2843
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
- first_name: Edgardo
full_name: Saucedo, Edgardo
last_name: Saucedo
- first_name: Alejandro
full_name: Pérez Rodríguez, Alejandro
last_name: Pérez Rodríguez
citation:
ama: 'Fairbrother A, Izquierdo Roca V, Fontané X, et al. ZnS grain size effects
on near-resonant Raman scattering: Optical non-destructive grain size estimation.
CrystEngComm. 2014;16(20):4120-4125. doi:10.1039/c3ce42578a'
apa: 'Fairbrother, A., Izquierdo Roca, V., Fontané, X., Ibáñez, M., Cabot, A., Saucedo,
E., & Pérez Rodríguez, A. (2014). ZnS grain size effects on near-resonant
Raman scattering: Optical non-destructive grain size estimation. CrystEngComm.
Royal Society of Chemistry. https://doi.org/10.1039/c3ce42578a'
chicago: 'Fairbrother, Andrew, Victor Izquierdo Roca, Xavier Fontané, Maria Ibáñez,
Andreu Cabot, Edgardo Saucedo, and Alejandro Pérez Rodríguez. “ZnS Grain Size
Effects on Near-Resonant Raman Scattering: Optical Non-Destructive Grain Size
Estimation.” CrystEngComm. Royal Society of Chemistry, 2014. https://doi.org/10.1039/c3ce42578a.'
ieee: 'A. Fairbrother et al., “ZnS grain size effects on near-resonant Raman
scattering: Optical non-destructive grain size estimation,” CrystEngComm,
vol. 16, no. 20. Royal Society of Chemistry, pp. 4120–4125, 2014.'
ista: 'Fairbrother A, Izquierdo Roca V, Fontané X, Ibáñez M, Cabot A, Saucedo E,
Pérez Rodríguez A. 2014. ZnS grain size effects on near-resonant Raman scattering:
Optical non-destructive grain size estimation. CrystEngComm. 16(20), 4120–4125.'
mla: 'Fairbrother, Andrew, et al. “ZnS Grain Size Effects on Near-Resonant Raman
Scattering: Optical Non-Destructive Grain Size Estimation.” CrystEngComm,
vol. 16, no. 20, Royal Society of Chemistry, 2014, pp. 4120–25, doi:10.1039/c3ce42578a.'
short: A. Fairbrother, V. Izquierdo Roca, X. Fontané, M. Ibáñez, A. Cabot, E. Saucedo,
A. Pérez Rodríguez, CrystEngComm 16 (2014) 4120–4125.
date_created: 2018-12-11T11:46:00Z
date_published: 2014-05-28T00:00:00Z
date_updated: 2021-01-12T07:44:22Z
day: '28'
doi: 10.1039/c3ce42578a
extern: '1'
intvolume: ' 16'
issue: '20'
language:
- iso: eng
month: '05'
oa_version: None
page: 4120 - 4125
publication: CrystEngComm
publication_status: published
publisher: Royal Society of Chemistry
publist_id: '7473'
quality_controlled: '1'
status: public
title: 'ZnS grain size effects on near-resonant Raman scattering: Optical non-destructive
grain size estimation'
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 16
year: '2014'
...
---
_id: '358'
abstract:
- lang: eng
text: Monodispersed Pt3Sn nanoparticles were prepared through a mild thermal synthesis
in the presence of surfactants. The performance of Pt3Sn for the electrooxidation
of ethanol and adsorbed carbon monoxide (COad) in acid medium was studied by a
combination of electrochemical and insitu spectroscopic methods, namely, infrared
reflection absorption spectroscopy and differential electrochemical mass spectrometry
(DEMS), and the results were compared to those obtained with the use of Pt black.
The formation of the Pt3Sn solid solution promoted the oxidation of COad at less-positive
potentials than those required for Pt black. Also, the electrooxidation of ethanol,
especially at lower potentials, was more favorable with Pt3Sn, as deduced from
the higher faradaic currents recorded during the ethanol oxidation reaction (EOR).
However, the distribution of products as deduced by DEMS analysis suggested that
the formation of C1 products, CO2 inclusive, is less significant on Pt3Sn than
on Pt. In fact, the higher faradaic current recorded with the former catalyst
can be attributed to the greater amounts of acetaldehyde and acetic acid formed.
After the EOR, the surface of both Pt and Pt3Sn remained covered by ethanol adsorbates.
Whereas C2 fragments were the main adsorbates at the surface of Pt3Sn after the
EOR, both C1 and C2 species remained adsorbed at Pt black.
acknowledgement: The Spanish Ministry of Science and Innovation (Project ENE2010–15381)
and the CSIC (Project 201080E116) are acknowledged for financial support.
article_processing_charge: No
article_type: original
author:
- first_name: Tirma
full_name: Herranz, Tirma
last_name: Herranz
- first_name: Maria
full_name: Ibáñez, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibáñez
orcid: 0000-0001-5013-2843
- first_name: José
full_name: Gómez De La Fuente, José
last_name: Gómez De La Fuente
- first_name: Francisco
full_name: Pérez Alonso, Francisco
last_name: Pérez Alonso
- first_name: Miguel
full_name: Peña, Miguel
last_name: Peña
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
- first_name: Sergio
full_name: Rojas, Sergio
last_name: Rojas
citation:
ama: Herranz T, Ibáñez M, Gómez De La Fuente J, et al. In situ study of ethanol
electrooxidation on monodispersed Pt inf 3 inf Sn nanoparticles. ChemElectroChem.
2014;1(5):885-895. doi:10.1002/celc.201300254
apa: Herranz, T., Ibáñez, M., Gómez De La Fuente, J., Pérez Alonso, F., Peña, M.,
Cabot, A., & Rojas, S. (2014). In situ study of ethanol electrooxidation on
monodispersed Pt inf 3 inf Sn nanoparticles. ChemElectroChem. Wiley-Blackwell.
https://doi.org/10.1002/celc.201300254
chicago: Herranz, Tirma, Maria Ibáñez, José Gómez De La Fuente, Francisco Pérez
Alonso, Miguel Peña, Andreu Cabot, and Sergio Rojas. “In Situ Study of Ethanol
Electrooxidation on Monodispersed Pt Inf 3 Inf Sn Nanoparticles.” ChemElectroChem.
Wiley-Blackwell, 2014. https://doi.org/10.1002/celc.201300254.
ieee: T. Herranz et al., “In situ study of ethanol electrooxidation on monodispersed
Pt inf 3 inf Sn nanoparticles,” ChemElectroChem, vol. 1, no. 5. Wiley-Blackwell,
pp. 885–895, 2014.
ista: Herranz T, Ibáñez M, Gómez De La Fuente J, Pérez Alonso F, Peña M, Cabot A,
Rojas S. 2014. In situ study of ethanol electrooxidation on monodispersed Pt inf
3 inf Sn nanoparticles. ChemElectroChem. 1(5), 885–895.
mla: Herranz, Tirma, et al. “In Situ Study of Ethanol Electrooxidation on Monodispersed
Pt Inf 3 Inf Sn Nanoparticles.” ChemElectroChem, vol. 1, no. 5, Wiley-Blackwell,
2014, pp. 885–95, doi:10.1002/celc.201300254.
short: T. Herranz, M. Ibáñez, J. Gómez De La Fuente, F. Pérez Alonso, M. Peña, A.
Cabot, S. Rojas, ChemElectroChem 1 (2014) 885–895.
date_created: 2018-12-11T11:46:00Z
date_published: 2014-03-03T00:00:00Z
date_updated: 2021-01-12T07:44:26Z
day: '03'
doi: 10.1002/celc.201300254
extern: '1'
intvolume: ' 1'
issue: '5'
language:
- iso: eng
month: '03'
oa_version: None
page: 885 - 895
publication: ChemElectroChem
publication_status: published
publisher: Wiley-Blackwell
publist_id: '7474'
quality_controlled: '1'
status: public
title: In situ study of ethanol electrooxidation on monodispersed Pt inf 3 inf Sn
nanoparticles
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 1
year: '2014'
...
---
_id: '359'
abstract:
- lang: eng
text: An appropriate way of realizing property nanoengineering in complex quaternary
chalcogenide nanocrystals is presented for Cu2Cd xSnSey(CCTSe) polypods. The pivotal
role of the polarity in determining morphology, growth, and the polytypic branching
mechanism is demonstrated. Polarity is considered to be responsible for the formation
of an initial seed that takes the form of a tetrahedron with four cation-polar
facets. Size and shape confinement of the intermediate pentatetrahedral seed is
also attributed to polarity, as their external facets are anion-polar. The final
polypod extensions also branch out as a result of a cation-polarity-driven mechanism.
Aberration-corrected scanning transmission electron microscopy is used to identify
stannite cation ordering, while ab initio studies are used to show the influence
of cation ordering/distortion, stoichiometry, and polytypic structural change
on the electronic band structure.
acknowledgement: The research leading to these results has received funding from the
European Union Seventh Framework Programme under grant agreement 312483-ESTEEM2
(Integrated Infrastructure InitiativeI3) for using advance electron microscopes
at ER-C Jülich. J.A. acknowledges the funding from the Spanish MICINN project MAT2010-15138
(COPEON) and Generalitat de Catalunya 2009 SGR 770. R.R.Z. acknowledges the former.
The authors would also like to thank the TEM facilities in Serveis Cientificotecnics
from Universitat de Barcelona. N.G.-C. acknowledges the Spanish MECD for her Ph.D.
grant in the FPU program. JR and RZ acknowledge funding from MULTICAT and NANOENESTO
projects.
article_processing_charge: No
article_type: original
author:
- first_name: Reza
full_name: Zamani, Reza
last_name: Zamani
- first_name: Maria
full_name: Ibáñez, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibáñez
orcid: 0000-0001-5013-2843
- first_name: Martina
full_name: Luysberg, Martina
last_name: Luysberg
- first_name: Nuria
full_name: García Castelló, Nuria
last_name: García Castelló
- first_name: Lothar
full_name: Houben, Lothar
last_name: Houben
- first_name: Joan
full_name: Prades, Joan
last_name: Prades
- first_name: Vincenzo
full_name: Grillo, Vincenzo
last_name: Grillo
- first_name: Rafal
full_name: Dunin Borkowski, Rafal
last_name: Dunin Borkowski
- first_name: Joan
full_name: Morante, Joan
last_name: Morante
- first_name: Andreu
full_name: Cabot, Andreu
last_name: Cabot
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
citation:
ama: Zamani R, Ibáñez M, Luysberg M, et al. Polarity-driven polytypic branching
in Cu-based quaternary chalcogenide nanostructures. ACS Nano. 2014;8(3):2290-2301.
doi:10.1021/nn405747h
apa: Zamani, R., Ibáñez, M., Luysberg, M., García Castelló, N., Houben, L., Prades,
J., … Arbiol, J. (2014). Polarity-driven polytypic branching in Cu-based quaternary
chalcogenide nanostructures. ACS Nano. American Chemical Society. https://doi.org/10.1021/nn405747h
chicago: Zamani, Reza, Maria Ibáñez, Martina Luysberg, Nuria García Castelló, Lothar
Houben, Joan Prades, Vincenzo Grillo, et al. “Polarity-Driven Polytypic Branching
in Cu-Based Quaternary Chalcogenide Nanostructures.” ACS Nano. American
Chemical Society, 2014. https://doi.org/10.1021/nn405747h.
ieee: R. Zamani et al., “Polarity-driven polytypic branching in Cu-based
quaternary chalcogenide nanostructures,” ACS Nano, vol. 8, no. 3. American
Chemical Society, pp. 2290–2301, 2014.
ista: Zamani R, Ibáñez M, Luysberg M, García Castelló N, Houben L, Prades J, Grillo
V, Dunin Borkowski R, Morante J, Cabot A, Arbiol J. 2014. Polarity-driven polytypic
branching in Cu-based quaternary chalcogenide nanostructures. ACS Nano. 8(3),
2290–2301.
mla: Zamani, Reza, et al. “Polarity-Driven Polytypic Branching in Cu-Based Quaternary
Chalcogenide Nanostructures.” ACS Nano, vol. 8, no. 3, American Chemical
Society, 2014, pp. 2290–301, doi:10.1021/nn405747h.
short: R. Zamani, M. Ibáñez, M. Luysberg, N. García Castelló, L. Houben, J. Prades,
V. Grillo, R. Dunin Borkowski, J. Morante, A. Cabot, J. Arbiol, ACS Nano 8 (2014)
2290–2301.
date_created: 2018-12-11T11:46:01Z
date_published: 2014-03-25T00:00:00Z
date_updated: 2021-01-12T07:44:30Z
day: '25'
doi: 10.1021/nn405747h
extern: '1'
intvolume: ' 8'
issue: '3'
language:
- iso: eng
month: '03'
oa_version: None
page: 2290 - 2301
publication: ACS Nano
publication_status: published
publisher: American Chemical Society
publist_id: '7475'
quality_controlled: '1'
status: public
title: Polarity-driven polytypic branching in Cu-based quaternary chalcogenide nanostructures
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 8
year: '2014'
...
---
_id: '451'
abstract:
- lang: eng
text: We introduce algorithms for the computation of homology, cohomology, and related
operations on cubical cell complexes, using the technique based on a chain contraction
from the original chain complex to a reduced one that represents its homology.
This work is based on previous results for simplicial complexes, and uses Serre’s
diagonalization for cubical cells. An implementation in C++ of the introduced
algorithms is available at http://www.pawelpilarczyk.com/chaincon/ together with
some examples. The paper is self-contained as much as possible, and is written
at a very elementary level, so that basic knowledge of algebraic topology should
be sufficient to follow it.
acknowledgement: 'This research was partially supported from Fundo Europeu de Desenvolvimento
Regional (FEDER) through COMPETE – Programa Operacional Factores de Compe titividade
(POFC) and from the Portuguese national funds through Fundacaoparaa Ciencia e a
Tecnologia (FCT) in the framework of the research project FCOMP-01-0124-FEDER-010645(ref.
FCT PTDC/MAT/098871/2008), as well as from the funds distributed through the European
Science Foundation (ESF) Research Networking Programme on “Applied and Computational
Algebraic Topology” (ACAT). P.Real was additionally supported by the Spanish Ministry
of Science and Innovation, project no. MTM2009-12716. '
author:
- first_name: Pawel
full_name: Pawel Pilarczyk
id: 3768D56A-F248-11E8-B48F-1D18A9856A87
last_name: Pilarczyk
- first_name: Pedro
full_name: Real, Pedro
last_name: Real
citation:
ama: Pilarczyk P, Real P. Computation of cubical homology, cohomology, and (co)homological
operations via chain contraction. Advances in Computational Mathematics.
2014;41(1):253-275. doi:10.1007/s10444-014-9356-1
apa: Pilarczyk, P., & Real, P. (2014). Computation of cubical homology, cohomology,
and (co)homological operations via chain contraction. Advances in Computational
Mathematics. Kluwer. https://doi.org/10.1007/s10444-014-9356-1
chicago: Pilarczyk, Pawel, and Pedro Real. “Computation of Cubical Homology, Cohomology,
and (Co)Homological Operations via Chain Contraction.” Advances in Computational
Mathematics. Kluwer, 2014. https://doi.org/10.1007/s10444-014-9356-1.
ieee: P. Pilarczyk and P. Real, “Computation of cubical homology, cohomology, and
(co)homological operations via chain contraction,” Advances in Computational
Mathematics, vol. 41, no. 1. Kluwer, pp. 253–275, 2014.
ista: Pilarczyk P, Real P. 2014. Computation of cubical homology, cohomology, and
(co)homological operations via chain contraction. Advances in Computational Mathematics.
41(1), 253–275.
mla: Pilarczyk, Pawel, and Pedro Real. “Computation of Cubical Homology, Cohomology,
and (Co)Homological Operations via Chain Contraction.” Advances in Computational
Mathematics, vol. 41, no. 1, Kluwer, 2014, pp. 253–75, doi:10.1007/s10444-014-9356-1.
short: P. Pilarczyk, P. Real, Advances in Computational Mathematics 41 (2014) 253–275.
date_created: 2018-12-11T11:46:33Z
date_published: 2014-01-01T00:00:00Z
date_updated: 2021-01-12T07:59:20Z
day: '01'
doi: 10.1007/s10444-014-9356-1
extern: 1
intvolume: ' 41'
issue: '1'
main_file_link:
- open_access: '1'
url: https://idus.us.es/xmlui/handle/11441/38719
month: '01'
oa: 1
page: 253 - 275
publication: Advances in Computational Mathematics
publication_status: published
publisher: Kluwer
publist_id: '7371'
quality_controlled: 0
status: public
title: Computation of cubical homology, cohomology, and (co)homological operations
via chain contraction
type: journal_article
volume: 41
year: '2014'
...