Sunday, March 24, 2013

Surface functionalization

Alkylation of Gold Surface by Treatment
with C18H37HgOTs and Anodic Hg Stripping
Malgorzata Mucha, Eva Kaletova, Anna Kohutova, Frank Scholz, Elizabeth S Stensrud, Ivan Stibor, Lubomir Pospisil, Florian von Wrochem, and Josef Michl

"Treatment of a gold surface with a solution of C18H37HgOTs under ambient conditions results in the formation of a covalently adsorbed monolayer containing alkyl chains attached directly to gold, Hg(0) atoms, and no tosyl groups. It is stable against a variety of chemical agents. When the initial deposition is performed at a positive applied potential and is followed by oxidative electrochemical stripping, the mercury can be completely removed, leaving a gold surface covered only with alkyl chains. The details of the attachment structure are not known. The conclusions are based on infrared spectroscopy, X-ray and UV photoelectron spectroscopy, ellipsometry, contact angle goniometry, differential pulse polarography, and measurements of electrode blocking and electrochemical admittance."

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