Publication Title

Physical Review Letters

Publication Date

6-18-2012

Document Type

Article

DOI

10.1103/PhysRevLett.108.257801

Keywords

Isotropic phase, orientational order, smectic-A, transition, azobenzene, mixtures, behavior

Disciplines

Physics

Abstract

Deuteron nuclear magnetic resonance is used to study the phase segregation behavior of photoisomerizable liquid crystal diheptylazobenzene (7AB) confined into cylindrical pores of Anopore membranes. It is demonstrated that the concentration of both components in a binary trans-7AB and cis-7AB mixture can be controlled dynamically using UV-illumination stimulated trans-to-cisphotoisomerization and thermally induced cis-to-trans backisomerization. The so far elusive temperature-concentration phase diagram of such system is determined by comparative analysis of the behavior in bulk, thin-planar, and Anopore-confining geometry.

Comments

Copyright 2012 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevLett.108.257801.


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