@inproceedings{oai:jaxa.repo.nii.ac.jp:00013321,
 author = {岡本, 茂 and 内匠, 逸 and 早川, 知克 and 日原, 岳彦 and 榎本, 美久 and 長谷川, 博一 and 高山, 茂樹 and 池田, 章彦 and 毛利, 政博 and 坂本, 直紀 and 廣畑, 徹 and 瀧口, 義浩 and 原, 滋郎 and 越川, 尚清 and 角, 幸治 and 宮田, 杏美 and 芝, 尚紀 and 山中, 孝彦 and Okamoto, Shigeru and Takumi, Ichi and Hayakawa, Tomokatsu and Hihara, Takehiko and Enomoto, Yoshihisa and Hasegawa, Hirokazu and Takayama, Shigeki and Ikeda, Akihiko and Mouri, Masahiro and Sakamoto, Naoki and Hirohata, Toru and Takiguchi, Yoshihiro and Hara, Shigeo and Koshikawa, Naokiyo and Sumi, Koji and Miyata, Azumi and Shiba, Naoki and Yamanaka, Takahiko},
 book = {宇宙利用シンポジウム, Space Utilization Research: Proceedings of Space Utilization Symposium},
 month = {Mar},
 note = {第25回宇宙利用シンポジウム(2009年1月14日-15日, 宇宙航空研究開発機構宇宙科学研究本部相模原キャンパス), The Twenty-fifth Space Utilization Symposium (January 14-15, 2009: ISAS/JAXA Sagamihara, Japan), "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., 形態: カラー図版あり, 資料番号: AA0064297077},
 publisher = {宇宙航空研究開発機構宇宙科学研究本部, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)},
 title = {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},
 volume = {25},
 year = {2009}
}