Enabling and Localizing Omnidirectional Nonlinear Deformation in Liquid Crystalline Elastomers

Advanced Materials
Anesia D AugusteTimothy J White

Abstract

Liquid crystalline elastomers (LCEs) are widely recognized for their exceptional promise as actuating materials. Here, the comparatively less celebrated but also compelling nonlinear response of these materials to mechanical load is examined. Prior examinations of planarly aligned LCEs exhibit unidirectional nonlinear deformation to mechanical loads. A methodology is presented to realize surface-templated homeotropic orientation in LCEs and omnidirectional nonlinearity in mechanical deformation. Inkjet printing of the homeotropic alignment surface localizes regions of homeotropic and planar orientation within a monolithic LCE element. The local control of the self-assembly and orientation of the LCE, when subject to rational design, yield functional materials continuous in composition with discontinuous mechanical deformation. The variation in mechanical deformation in the film can enable the realization of nontrivial performance. For example, a patterned LCE is prepared and shown to exhibit a near-zero Poisson's ratio. Further, it is demonstrated that the local control of deformation can enable the fabrication of rugged, flexible electronic devices. An additively manufactured device withstands complex mechanical deformations t...Continue Reading

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Sep 29, 2011·Angewandte Chemie·Danqing LiuDirk J Broer
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Feb 28, 2015·Science·Taylor H WareTimothy J White
Aug 21, 2015·Advanced Materials·Anders ClausenJennifer A Lewis
Oct 23, 2015·Nature Materials·Timothy J White, Dirk J Broer
Feb 24, 2016·Nature Communications·Taylor H WareTimothy J White
Feb 10, 2017·Accounts of Chemical Research·Seog-Jin JeonRyan C Hayward
Sep 7, 2017·Advanced Materials·Alexander D ValentineJennifer A Lewis

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Citations

Jun 21, 2019·Angewandte Chemie·Brian R DonovanTimothy J White
Nov 9, 2019·Soft Matter·Hayden E FowlerTimothy J White
Oct 3, 2019·Physical Review. E·Madison S Krieger, Marcelo A Dias
Mar 7, 2020·Advanced Materials·Joselle M McCrackenTimothy J White
Oct 17, 2020·Journal of Applied Physics·Cedric P AmbuloTaylor H Ware

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