www.nanopicoftheday.org
March 27, 2004
Dip Pen Etching
Source: Chad
Mirkin
References:
-
"DPN-Generated Nanostructures Made of Gold, Silver, and
Palladium" Hua Zhang and Chad A. Mirkin
Chem. Mater.; 2004; ASAP Web Release Date: 24-Mar-2004;
(Article) DOI: 10.1021/cm0305507
Description:
Dip Pen Nanolithography (DPN) uses the tip of an atomic force microscope (AFM)
to deposit a tiny layer of a chemical on a surface. That layer can be used
like as a protective mask to etch away the surrounding material, leaving the
material under the chemical intact. This method allows even metals to be
patterned at the sub-100 nm scale. In this image, arrays of figures are
patterned in silver after being "drawn" with mercaptohexadecanoic acid (MHA)
"ink" and subsequent chemical etching. These results show how one can use
DPN as an alternative to more complex and costly procedures such as electron
beam lithography to generate nanostructures from inorganic materials.
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