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Optical Alignment and Patterning of Nanoscale Microdomains in a Block Copolymer Thin Film
Author(s) -
Morikawa Y.,
Nagano S.,
Watanabe K.,
Kamata K.,
Iyoda T.,
Seki T.
Publication year - 2006
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200502573
Subject(s) - materials science , copolymer , azobenzene , nanoscopic scale , thin film , polymer , polarization (electrochemistry) , ethylene oxide , nanostructure , poly ethylene , optoelectronics , oxide , nanotechnology , ethylene , composite material , biochemistry , chemistry , catalysis , metallurgy
Optical 3D alignment of nanocylinders has been successfully attained for thin films of a block copolymer (see figure) comprising azobenzene‐containing liquid‐crystalline polymers and poly(ethylene oxide) via photoinduced massive migration. The out‐of‐plane and in‐plane alignments are achieved by controlling the film thickness and selection of linear polarization direction upon illumination, respectively.