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Nanostructure Dependent Surface Energy of Silica Nanorod Arrays through Block Copolymer Templating Processes

Published online by Cambridge University Press:  14 March 2011

Yongbin Zhao ,
Aihua Chen  and
Tomokazu Iyoda
Yongbin Zhao
Affiliation:
Division of Integrated Molecular Engineering, Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan.
Aihua Chen
Affiliation:
Division of Integrated Molecular Engineering, Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan.
Tomokazu Iyoda
Affiliation:
Division of Integrated Molecular Engineering, Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan.
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Abstract

The self-assembled block copolymer films with poly (ethylene oxide) (PEO) and hydrophobic polymetharylate (PMA) with azobenzene mesogen in the side chain, denoted as PEOm-b-PMA(Az)n, were used as the template to prepare hexagonally ordered silica nanorod arrays by immersing the template films in the silicate precursor containing tetraetoxysilane (TEOS). The diameter and the center-to-center distance of the SiO2 nanorod arrays were controlled by selecting the block copolymer with different PEO volume fraction. In addition, the contact angles of different kinds’ solvents for the SiO2 nanorod arrays were characterized. We further found, the diameter and the period distance of silica nanorods are very important factors for controlling the contact angle of different kind’s solvents on the surface of the SiO2 nanorod arrays.

Keywords

nanostructuresol-gelself-assembly
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1312: Symposium HH/II/JJ – Polymer-Based Materials and Composites—Synthesis, Assembly and Applications , 2011 , mrsf10-1312-jj05-01
Copyright
Copyright © Materials Research Society 2011

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