Chemical and Biomolecular Engineering Faculty Research

Title

Photoinduced Properties of Liquid Crystalline Azobenzene Polymer in Langmuir-blodgett Films Investigated by Surface Plasmon Resonance

Document Type

Article

Publication Date

Fall 1998

Abstract

A novel phenomenon of photoisomerization-induced switch properties in liquid crystalline azobenzene polymer poly{2-hydroethylmethacrylate}-co-{{6-[4-(s-2-methyl-1-bufyloxycarbonylphenylazo)phenoxy]hexylmethacrylate}} Langmuir–Blodgett (LB) monolayers is reported. These monolayers were deposited on gold film and irradiated with UV (360 nm) and blue (450 nm) light. The switching properties were investigated by the surface plasmon resonance (SPR) technique. It has been shown that it is possible to switch the refractive index reversibly by irradiating these films with light of appropriate wavelength. Evidence shows that the surface pressure has an influence on the evolution of the resonance angle.

Volume

329

First Page

427

Last Page

430