Optical Alignment and Patterning of Nanoscale Microdomains in a Block Copolymer Thin Film


  • This work was supported by Grant-in-Aid for Scientific Research (No. 16205019) from The Ministry of Education, Culture, Sports, Science and Technology, Japan, and the CREST Program of the Japan Science and Technology Agency (JST). We thank Dr. Nobuyuki Zettsu of Tokyo Tech. and Mr. Toshinobu Ogasawara of Nagoya Univ. for technical assistance and helpful discussions.


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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.