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- W2418602054 abstract "Abstract A liquid crystal network whose chromophores are functionalized by photochromic dye exhibits light-induced mechanical behaviour. As a result, the micro-scaled thermotropic traits of the network and the macroscopic phase behaviour are both influenced as light alternates the shape of the dyes. In this paper, we present an analysis of this photomechanical behaviour based on the proposed multiscale framework, which incorporates the molecular details of microstate evolution into a continuum-based understanding. The effects of trans-to-cis photoisomerization driven by actinic light irradiation are first examined using molecular dynamics simulations and are compared against the predictions of the classical dilution model; this reveals certain characteristics of mesogenic interaction upon isomerization, followed by changes in the polymeric structure. We then upscale the thermotropic phase-related information with the aid of a nonlinear finite element analysis; macroscopic deflection with respect to the wide ranges of temperature and actinic light intensity are thereby examined, which reveals that the classical model underestimates the true deformation. This work therefore provides measures for analysing photomechanics in general by bridging the gap between the micro- and macro-scales." @default.
- W2418602054 created "2016-06-24" @default.
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- W2418602054 date "2016-02-01" @default.
- W2418602054 modified "2023-10-01" @default.
- W2418602054 title "Nonlinear photomechanics of nematic networks: upscaling microscopic behaviour to macroscopic deformation" @default.
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- W2418602054 doi "https://doi.org/10.1038/srep20026" @default.
- W2418602054 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4734330" @default.
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