Issue 24, 2017

Voxel resolution in the directed self-assembly of liquid crystal polymer networks and elastomers

Abstract

Monomeric mixtures formulated to prepare a liquid crystal polymer network (LCN) or elastomer (LCE) can be “programmed” by surface alignment to retain complex and arbitrary spatial distributions of the director orientation upon polymerization. The localized control of orientation in a given volume (voxel) within these materials is the subject of intense research, currently motivated by the prospect of distinctive mechanical responses (both active and passive). Here, we report on a rapid and scalable photopatterning method to prepare alignment surfaces with a throughput of 10 mm2 s−1, using a commercial spatial light modulator and projection optics. Enabled by this method, we detail that the resolution limit of the inscribed director profile is not dictated by the optical system but is determined by the elastic-mediated orientational relaxation of the liquid crystalline materials. A simple model is experimentally validated and the implications for device design are discussed.

Graphical abstract: Voxel resolution in the directed self-assembly of liquid crystal polymer networks and elastomers

Article information

Article type
Paper
Submitted
03 Eph 2017
Accepted
16 Mey 2017
First published
25 Mey 2017

Soft Matter, 2017,13, 4335-4340

Voxel resolution in the directed self-assembly of liquid crystal polymer networks and elastomers

B. A. Kowalski, V. P. Tondiglia, T. Guin and T. J. White, Soft Matter, 2017, 13, 4335 DOI: 10.1039/C7SM00663B

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