Open Access
Physical Review Letters, volume 119, issue 5, publication number 057801
Enhanced Deformation of Azobenzene-Modified Liquid Crystal Polymers under Dual Wavelength Exposure: A Photophysical Model.
1
Micromechanics of Materials, Zernike Institute for Advanced Materials, University of Groningen, 9747 AG Groningen, The Netherlands
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Publication type: Journal Article
Publication date: 2017-07-31
Journal:
Physical Review Letters
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 8.6
ISSN: 00319007, 10797114
General Physics and Astronomy
Abstract
Azobenzene-embedded liquid crystal polymers can undergo mechanical deformation in response to ultraviolet (UV) light. The natural rodlike trans state azobenzene absorbs UV light and isomerizes to a bentlike cis state, which disturbs the order of the polymer network, leading to an anisotropic deformation. The current consensus is that the magnitude of the photoinduced deformation is related to the statistical building up of molecules in the cis state. However, a recent experimental study [Liu and Broer, Nat. Commun. 6 8334 (2015).NCAOBW2041-172310.1038/ncomms9334] shows that a drastic (fourfold) increase of the photoinduced deformation can be generated by exposing the samples simultaneously to 365 nm (UV) and 455 nm (visible) light. To elucidate the physical mechanism that drives this increase, we develop a two-light attenuation model and an optomechanical constitutive relation that not only accounts for the statistical accumulation of cis azobenzenes, but also for the dynamic trans-cis-trans oscillatory isomerization process. Our experimentally calibrated model predicts that the optimal single-wavelength exposure is 395 nm light, a pronounced shift towards the visible spectrum. In addition, we identify a range of optimal combinations of two-wavelength lights that generate a favorable response for a given amount of injected energy. Our model provides mechanistic insight into the different (multi)wavelength exposures used in experiments and, at the same time, opens new avenues towards enhanced, multiwavelength optomechanical behavior.
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Citations by publishers
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3 publications, 21.43%
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3 publications, 21.43%
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American Institute of Physics (AIP)
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2 publications, 14.29%
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1 publication, 7.14%
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American Association for the Advancement of Science (AAAS)
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1 publication, 7.14%
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1
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3
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- We do not take into account publications that without a DOI.
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- Statistics recalculated weekly.
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Liu L., Onck P. R. Enhanced Deformation of Azobenzene-Modified Liquid Crystal Polymers under Dual Wavelength Exposure: A Photophysical Model. // Physical Review Letters. 2017. Vol. 119. No. 5. 057801
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Liu L., Onck P. R. Enhanced Deformation of Azobenzene-Modified Liquid Crystal Polymers under Dual Wavelength Exposure: A Photophysical Model. // Physical Review Letters. 2017. Vol. 119. No. 5. 057801
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TY - JOUR
DO - 10.1103/PhysRevLett.119.057801
UR - https://doi.org/10.1103%2FPhysRevLett.119.057801
TI - Enhanced Deformation of Azobenzene-Modified Liquid Crystal Polymers under Dual Wavelength Exposure: A Photophysical Model.
T2 - Physical Review Letters
AU - Liu, Ling
AU - Onck, Patrick R.
PY - 2017
DA - 2017/07/31 00:00:00
PB - American Physical Society (APS)
IS - 5
VL - 119
SN - 0031-9007
SN - 1079-7114
ER -
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@article{2017_Liu
author = {Ling Liu and Patrick R. Onck},
title = {Enhanced Deformation of Azobenzene-Modified Liquid Crystal Polymers under Dual Wavelength Exposure: A Photophysical Model.},
journal = {Physical Review Letters},
year = {2017},
volume = {119},
publisher = {American Physical Society (APS)},
month = {jul},
url = {https://doi.org/10.1103%2FPhysRevLett.119.057801},
number = {5},
doi = {10.1103/PhysRevLett.119.057801}
}