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Issue 15, 2005
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Super-hydrophobic/super-hydrophilic patterning of gold surfaces by photocatalytic lithography

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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

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Publication details

The article was received on 17 Dec 2004, accepted on 04 Feb 2005 and first published on 14 Feb 2005


Article type: Paper
DOI: 10.1039/B418884E
Citation: J. Mater. Chem., 2005,15, 1523-1527
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    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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