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Morphology of Mesoporous Silica Grown on Organic Surfaces: Effects of Surface Functional Groups and Microstructures

Published online by Cambridge University Press:  10 February 2011

Atsushi Hozumi ,
Yoshiyuki Yokogawa ,
Tetsuya Kameyama ,
Katsumasa Hiraku ,
Hiroyuki Sugimura ,
Osamu Takai  and
Masazumi Okido
Atsushi Hozumi
Affiliation:
Bioceramics Laboratory, Ceramics Technology Department, National Industrial Research Institute of Nagoya, 1-1 Hirate-cho,Kita-ku, Nagoya 462–8510, Japan, [email protected]
Yoshiyuki Yokogawa
Affiliation:
Bioceramics Laboratory, Ceramics Technology Department, National Industrial Research Institute of Nagoya, 1-1 Hirate-cho,Kita-ku, Nagoya 462–8510, Japan, [email protected]
Tetsuya Kameyama
Affiliation:
Bioceramics Laboratory, Ceramics Technology Department, National Industrial Research Institute of Nagoya, 1-1 Hirate-cho,Kita-ku, Nagoya 462–8510, Japan, [email protected]
Katsumasa Hiraku
Affiliation:
Department of Materials Processing Engineering, Graduate School of Engineering, Nagoya University, Furo-cho,Chikusa-ku, Nagoya 464–8603, Japan
Hiroyuki Sugimura
Affiliation:
Department of Materials Processing Engineering, Graduate School of Engineering, Nagoya University, Furo-cho,Chikusa-ku, Nagoya 464–8603, Japan
Osamu Takai
Affiliation:
Department of Materials Processing Engineering, Graduate School of Engineering, Nagoya University, Furo-cho,Chikusa-ku, Nagoya 464–8603, Japan
Masazumi Okido
Affiliation:
Center for Integrated Research in Science and Engineering, Nagoya University, Furocho, Chikusa-ku, Nagoya 464–8603, Japan
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Abstract

Through organized surfactant templating, mesoporous silica (MPS) was prepared on two different types of substrates with a hydrophilic or hydrophobic surface. In this study, a Si substrate covered with photochemically-grown surface oxide was served as the hydrophilic surface. The hydrophobic surfaces were prepared by forming an organosilane self-assembled monolayer (SAM) on Si substrates through chemical vapor deposition. Octadecyltrimetoxysilane or (heptadecafluoro-1,1,2,2-tetrahydro-decyl) trimethoxysilane was used as a precursor. The morphologies of the deposited MPS on these surfaces were found to be quite different. The MPS formed on the hydrophilic Si substrate consisted of small disk-like features of 2∼5 μm in diameter, while those on the hydrophobic SAM surfaces were continuous thin films. These morphological differences of the deposited MPS were ascribable to the differences in the supramolecular template structure formed on each of the surfaces. Furthermore, in order to study microstructure effects on the MPS growth, a micropatterned SAM/Si, on which hydrophobic regions were spaced alternately with hydrophilic regions at a 5 μm-wide interval, was employed as a sample substrate. On this substrate, MPS was preferentially grown on the hydrophobic regions while the hydrophilic regions remained almost undeposited. The spatial control of surfactant-assembling using the micropatterned SAM surface was successfully accomplished.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 599: Symposium DD – Mineralization in Natural & Synthetic Biomaterials , 1999 , 255
Copyright
Copyright © Materials Research Society 2000

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