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Title: Optical Manipulation of Shape-Morphing Elastomeric Liquid Crystal Microparticles Doped with Gold Nanocrystals

Abstract

We demonstrate facile optical manipulation of shape of birefringent colloidal microparticles made from liquid crystal elastomers. Using soft lithography and polymerization, we fabricate elastomeric microcylinders with weakly undulating director oriented on average along their long axes. These particles are infiltrated with gold nanospheres acting as heat transducers that allow for an efficient localized transfer of heat from a focused infrared laser beam to a submicrometer region within a microparticle. Photothermal control of ordering in the liquid crystal elastomer using scanned beams allows for a robust control of colloidal particles, enabling both reversible and irreversible changes of shape. Possible applications include optomechanics, microfluidics, and reconfigurable colloidal composites with shape-dependent self-assembly.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
National Science Foundation (NSF); USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1050145
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 100; Journal Issue: 24; Related Information: Article No. 241901; Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; ELASTOMERS; GOLD; LASERS; LIQUID CRYSTALS; POLYMERIZATION; SHAPE; TRANSDUCERS; Chemical and Material Sciences

Citation Formats

Sun, Y. R., Evans, J. S., Lee, T., Senyuk, B., Keller, P., He, S. L., and Smalyukh, I. I. Optical Manipulation of Shape-Morphing Elastomeric Liquid Crystal Microparticles Doped with Gold Nanocrystals. United States: N. p., 2012. Web. doi:10.1063/1.4729143.
Sun, Y. R., Evans, J. S., Lee, T., Senyuk, B., Keller, P., He, S. L., & Smalyukh, I. I. Optical Manipulation of Shape-Morphing Elastomeric Liquid Crystal Microparticles Doped with Gold Nanocrystals. United States. doi:10.1063/1.4729143.
Sun, Y. R., Evans, J. S., Lee, T., Senyuk, B., Keller, P., He, S. L., and Smalyukh, I. I. Mon . "Optical Manipulation of Shape-Morphing Elastomeric Liquid Crystal Microparticles Doped with Gold Nanocrystals". United States. doi:10.1063/1.4729143.
@article{osti_1050145,
title = {Optical Manipulation of Shape-Morphing Elastomeric Liquid Crystal Microparticles Doped with Gold Nanocrystals},
author = {Sun, Y. R. and Evans, J. S. and Lee, T. and Senyuk, B. and Keller, P. and He, S. L. and Smalyukh, I. I.},
abstractNote = {We demonstrate facile optical manipulation of shape of birefringent colloidal microparticles made from liquid crystal elastomers. Using soft lithography and polymerization, we fabricate elastomeric microcylinders with weakly undulating director oriented on average along their long axes. These particles are infiltrated with gold nanospheres acting as heat transducers that allow for an efficient localized transfer of heat from a focused infrared laser beam to a submicrometer region within a microparticle. Photothermal control of ordering in the liquid crystal elastomer using scanned beams allows for a robust control of colloidal particles, enabling both reversible and irreversible changes of shape. Possible applications include optomechanics, microfluidics, and reconfigurable colloidal composites with shape-dependent self-assembly.},
doi = {10.1063/1.4729143},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 24,
volume = 100,
place = {United States},
year = {2012},
month = {6}
}