Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 284, Issue -, Pages 535-541Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2005.10.081
Keywords
ABA triblock copolymer; azobenzene; LB film; atomic force microscopy; nanophase separation structure; conformation
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We report herein the microphase separation structures (nanostructures) observed in Langmuir-Blodgett monolayers of an ABA block copolymer comprising of azobenzene-containing methacrylate and poly(ethylene oxide) as A and B block, respectively. After spreading this polymer on water in the trans and cis form of azobenzene, the monolayer is transferred onto mica at 1 mN m(-1). The morphological features are observed by atomic force microscopy. The features of the nanostructures formed in the monolayers have obviously different features in the isomerization state of azobenzene. The conversions of the morphological features accompanied by the isomerization of azobenzene are attempted by light irradiation and dark adaptation. This paper focuses on the features in morphological conversions attained in the photo- and thermal processes. (c) 2005 Elsevier B.V. All rights reserved.
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