Anisotropic polymerization of a long-chain diacetylene derivative Langmuir-Blodgett film on a step-bunched SiO2/Si surface

Ryo Onoki, Keiji Ueno, Hiroo Nakahara, Genki Yoshikawa, Susumu Ikeda, Shiro Entani, Tetsuhiko Miyadera, Ikuyo Nakai, Hiroshi Kondoh, Toshiaki Ohta, Manabu Kiguchi, Koichiro Saiki

研究成果: Article査読

5 被引用数 (Scopus)

抄録

Alternating facet/terrace nanostructures were fabricated on a SiO 2 surface by step-bunching and thermal oxidation of a vicinal Si(111) substrate, and their influence upon the polymerization direction of a long-chain diacetylene derivative monolayer film was investigated by angle-dependent polarized near-edge X-ray absorption fine structure (NEXAFS) spectroscopy. It was found that the peak intensity of the C 1s-π* transition was stronger when the electric vector plane of the incident X-ray was parallel to the direction of the periodic facet/terrace structures rather than perpendicular to them. On the contrary, a polymer film fabricated on a flat SiO2 surface showed no in-plane anisotropy of the peak intensity. These results indicate that the diacetylene groups in the diacetylene derivative monolayer are preferentially photopolymerized in the direction not across but along the periodic one-dimensional structures on the step-bunched and thermally oxidized SiO2/Si(111) surface.

本文言語English
ページ(範囲)5742-5747
ページ数6
ジャーナルLangmuir
22
13
DOI
出版ステータスPublished - 2006 6 20
外部発表はい

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 表面および界面
  • 分光学
  • 電気化学

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