Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1674113 | Thin Solid Films | 2008 | 5 Pages |
Abstract
Photo-induced molecular alignment behavior of azo dye derivative (sodium 4,4′-bis (4-hydroxy-3-carboxy-phenylazo) benzidine-2,2′-disulphonate: SD1) was investigated using SD1 film prepared by spin-coating method. As-prepared SD1 film was composed of an amorphous layer with smooth surface. Upon linearly polarized UV light irradiation, the film surface was roughened slightly and X-ray diffraction measurement and transmittance electron microscope observation indicated that SD1 molecules crystallized with orientation. Molecular plane of SD1 aligned parallel to the substrate surface along the normal to the polarization direction of irradiated UV light through the trans–cis and cis–trans isomerizations of the azobenzene chromophore.
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Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Masayoshi Yamamoto, Kenji Kinashi, Yasuko Koshiba, Yasukiyo Ueda, Noriyuki Yoshimoto,