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Fabrication of Hexagonally Assembled Gold Nonodots Based on Anodization of Aluminum  

Lee, Joon Ho (Department of Textile Engineering, Inha University)
Lee, Han Sub (Department of Textile Engineering, Inha University)
Choi, Jinsub (Department of Chemical Engineering, Inha University)
Publication Information
Applied Chemistry for Engineering / v.20, no.2, 2009 , pp. 191-194 More about this Journal
Abstract
Porous alumina prepared by anodization has been widely studied since it shows very regular nanostructures at inexpensive prices. In this article, porous alumina is obtained by anodization of aluminum in the oxalic acid. After the first formed oxide is selectively removed from the aluminum substrate, the hexagonal nanostructures on the fresh aluminum are converted to nanodots by the second anodization in boric acid. Nanodots are arrayed in the convex of the hexagonal nanostructures. The optimization condition for the fabrication of nanodots with a height of 20 nm is investigated in detail. Subsequently, a gold film is deposited on the nanodots, resulting in the formation of gold nanodots arrays which are probably interesting substrate for biosensor applications.
Keywords
anodic aluminum oxide (AAO); boric acid, nanodot;
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