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

doi:10.1021/la060482d

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

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	5742-5747
Number of pages	6
Journal	Langmuir
Volume	22
Issue number	13
DOIs	https://doi.org/10.1021/la060482d
Publication status	Published - 2006 Jun 20
Externally published	Yes

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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

abstract = "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.",

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

year = "2006",

month = jun,

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doi = "10.1021/la060482d",

language = "English",

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T1 - Anisotropic polymerization of a long-chain diacetylene derivative Langmuir-Blodgett film on a step-bunched SiO2/Si surface

AU - Onoki, Ryo

AU - Ueno, Keiji

AU - Nakahara, Hiroo

AU - Yoshikawa, Genki

AU - Ikeda, Susumu

AU - Entani, Shiro

AU - Miyadera, Tetsuhiko

AU - Nakai, Ikuyo

AU - Kondoh, Hiroshi

AU - Ohta, Toshiaki

AU - Kiguchi, Manabu

AU - Saiki, Koichiro

PY - 2006/6/20

Y1 - 2006/6/20

N2 - 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.

AB - 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.

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

Abstract

ASJC Scopus subject areas

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