Graduate School of Engineering, Nagoya Institute of Technology
Graduate School of Engineering, Nagoya Institute of Technology
Graduate School of Engineering, Nagoya Institute of Technology
Graduate School of Engineering, Nagoya Institute of Technology
Graduate School of Engineering, Nagoya Institute of Technology
Department of Mechanical Engineering and Science, Kyoto University
Asahi Kasei Electronics
Asahi Kasei Electronics
Asahi Kasei Chemicals
Asahi Kasei
Central Research Laboratory, Hamamatsu Photonics
Central Research Laboratory, Hamamatsu Photonics
Central Research Laboratory, Hamamatsu Photonics
Japan Aerospace Exploration Agency (JAXA)
Graduate School of Engineering, Nagoya Institute of Technology
Graduate School of Engineering, Nagoya Institute of Technology
Graduate School of Engineering, Nagoya Institute of Technology
Graduate School of Engineering, Nagoya Institute of Technology
出版者
宇宙航空研究開発機構宇宙科学研究本部
出版者（英）
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)
雑誌名
宇宙利用シンポジウム
雑誌名(英)
Space Utilization Research: Proceedings of Space Utilization Symposium
The Twenty-fifth Space Utilization Symposium (January 14-15, 2009: ISAS/JAXA Sagamihara, Japan)
抄録（英）
"The Polymeric Photonic Crystal Working Group" has been organized to promote the research of photonic crystals fabricated with polymeric materials in a space craft such as ISS. Block copolymers with ultra-high-molecular-weight such as 10 g/mol are expected to be used as materials of photonic crystals because self assembly of block copolymers provides a bottom-up approach easier for fabricating optical devices than a top-down approach. Previously, we have discovered microphase separation can be induced by addition of selective solvent to a low concentration solution and succeeded in forming highly ordered large grains on the order of centimeter by using such a low concentration solution in the vicinity of the phase boundary because of the high mobility. In this study, gravity effect on such microdomain structures formed in the solution will be presented. To our knowledge, this is the first report of the gravity effect on polymer solutions. In this study, we used polystyrene-block-poly tert-butyl methacrylate which was synthesized by the living anionic polymerization technique. Block copolymer solutions were prepared using THF as a common solvent and water as a selective solvent in which gyroid structures were formed. These solutions were poured into glass tubes with a length of about 85 mm. The glass tubes were sealed in order to prevent evaporation of the solvents and kept vertically for several months. A spectroscopic measurement at intervals of 5 mm was performed every few days. After several weeks, the difference in the reflective peak wavelengths was observed between the microdomains near the upper and bottom parts in the glass tubes. This is attributed to the gravity effect. By using clinostat, i.e., a device that rotates specimens continuously to negate gravity effect, a similar experiment was performed. Compared with the samples stationary on the ground, the difference in the reflective peak wavelengths between the microdomains near the upper and bottom parts in the glass tube was suppressed.
2008年度高分子フォトニック結晶WG活動報告: 高分子ブロック共重合体準希薄溶液中で形成される巨大グレインに与える重力効果
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