Synthesis,Characterization, and Properties of Aligned Polyacetylene Films |
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| Authors: | Hideki Shirakawa Kazuo Akagi Shintaro Katayama Kotaro Araya Akio Mukoh Toshikazu Narahara |
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| Affiliation: | 1. Institute of Materials Science University of Tsukuba , Sakura-mura, Ibaraki, 305, Japan;2. Advanced Research Laboratory Hitachi, Ltd. , Kokubunji, Tokyo, 185, Japan;3. Hitachi Research Laboratory Hitachi, Ltd. , Kuji-cho, Hitachi, Ibaraki, 319-12, Japan |
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| Abstract: | Highly aligned polyacetylene films are synthesized by three different methods in which nematic liquid crystals are used as an ordered matrix solvent: Method 1, polymerization of acetylene is carried out in a quiescent nematic solution in which a Ti(OBu)4-AlEt3 Ziegler-Natta catalyst is dissolved homogeneously; Method 2, macroscopic alignment is attained by gravity flow of the nematic liquid crystal-catalyst system; and Method 3, the nematic liquid crystal-catalyst solution is aligned under a magnetic field. Characterization of these films is carried out through SEM observation and measurements of polarized visible and infrared absorption spectra. Results indicate that as-prepared films have highly aligned fibrils. Upon doping by I2 and AsF5, these films exhibit high electrical condactivity of the order of 104 S/cm. |
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