Issue 15, 2005

Super-hydrophobic/super-hydrophilic patterning of gold surfaces by photocatalytic lithography

Abstract

Super-hydrophobic and super-hydrophilic gold surfaces were prepared by modifying microstructured gold surfaces with thiols. The perfluorodecanethiol (PFDT)-modified rough gold surface was converted from super-hydrophobic (water contact angle = 150–160°) to super-hydrophilic (0–10°) by photocatalytic remote oxidation using a TiO2 film. During the remote oxidation, oxygen-containing groups were introduced to the thiol, and finally, even sulfur atoms were removed. Super-hydrophobic/super-hydrophilic patterns were also obtained by photocatalytic lithography, by using a TiO2-coated photomask. On the basis of this technique, enzymes and algal cells were patterned on the gold surfaces to fabricate biochips.

Graphical abstract: Super-hydrophobic/super-hydrophilic patterning of gold surfaces by photocatalytic lithography

Article information

Article type
Paper
Submitted
17 Dec 2004
Accepted
04 Feb 2005
First published
14 Feb 2005

J. Mater. Chem., 2005,15, 1523-1527

Super-hydrophobic/super-hydrophilic patterning of gold surfaces by photocatalytic lithography

H. Notsu, W. Kubo, I. Shitanda and T. Tatsuma, J. Mater. Chem., 2005, 15, 1523 DOI: 10.1039/B418884E

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