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Proceedings Paper

Unification of azo-polymer systems by photo-induced molecular movement
Author(s): Zouheir Sekkat; Andre Knoesen; Wolfgang Knoll; Robert D. Miller
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Paper Abstract

We review our recent research in the field of photochromic polymeric structures for optical data storage and nonlinear optics. We unify some of the sub-themes of azopolymer structures in the light of photo-induced movement of azobenzene molecules. In particular, we discuss photo-induced effects in supramolecular assemblies containing azobenzene molecules (e.g. Langmuir-Blodgett-Kuhn structures and ultrathin silane layers). Reorientation of azobenzenes in these structures will be compared to that observed in spin-cast films. Photoisomerization and photo-induced orientation of azobenzene molecules is also studied at the molecular level by means of azosilane molecules chemisorbed on Silicon Oxide substrates. We establish a correlation between polymer architecture and sub-glass transition temperature (Tg) light-induced molecular movement in high Tg nonlinear optical azo-polyimide polymers. We show that the isomerization reaction itself depends on the polymer molecular structure, and we present evidence of light-induced molecular movement 325 °C below Tg of a rigid NLO azopolyimide polymer containing no flexible connector or tether.

Paper Details

Date Published: 29 July 1997
PDF: 25 pages
Proc. SPIE 10290, Sol-Gel and Polymer Photonic Devices: A Critical Review, 102900H (29 July 1997); doi: 10.1117/12.279824
Show Author Affiliations
Zouheir Sekkat, Univ. of California/Davis and Max-Planck-Institut fuer Polymerforschung (Japan)
Andre Knoesen, Univ. of California/Davis (United States)
Wolfgang Knoll, Max-Planck-Institut fuer Polymerforschung (FRG) and RIKEN--The Institute of Physical and C (Germany)
Robert D. Miller, IBM Almaden Research Ctr. (United States)

Published in SPIE Proceedings Vol. 10290:
Sol-Gel and Polymer Photonic Devices: A Critical Review
Mark P. Andrews; S. Iraj Najafi, Editor(s)

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