Web Release Date: February 7,
Stoichiometric Functionalization of Gold Nanoparticles in Solution through a Free Radical Polymerization Approach
Department of Chemistry and Scientific Center for Materials Science, Philipps-Universität Marburg, Hans-Meerwein-Strasse, D-35032 Marburg, Germany
Received August 23, 2007
Abstract:
A new simple concept for the stoichiometrical functionalization of nanoparticles based on free radical polymerization of vinyl protected nanoparticles is presented. To demonstrate this concept 2-bis(4-vinylphenyl)disulfane was synthesized and used in the synthesis of gold nanoparticles, leading to 4-vinylthiophenol functionalized nanoparticles. Simple free radical polymerization of these particles initiated by 4,4'-azobis-(4-cyanopentanoic acid) delivered nanoparticles with a single carboxyl group. These monofunctionalized gold nanoparticles were utilized for chemical preparation of gold nanoparticle dimers as well as for construction of gold nanoparticle arrays via binding to polyallylamine.
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