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Versatile Solid Phase Synthesis of Gold Nanoparticle Dimers Using an Asymmetric Functionalization Approach

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journal contribution
posted on 02.05.2007, 00:00 by Rajesh Sardar, Tyler B. Heap, Jennifer S. Shumaker-Parry
Metal nanoparticles have received great attention due to their unique optical properties and wide range of applicability. In this context, controlling the particle−particle interaction is a major challenge to generate programmable assembly of nanoparticles for application in device fabrication and detection systems. In this communication, we report a versatile solid phase synthesis of gold nanoparticle dimers using commercially available organic reagents in an asymmetric functionalization approach. The method provides the opportunity to synthesize gold nanoparticle dimers for a wide size range. In addition, dimers consisting of two particles of different sizes also were prepared. The yield of the dimers varies from ∼30 to ∼65%, depending on the particle sizes. The process could be generalized to fabricate metal−semiconductor conjugates and to control interparticle spacing by changing the chain lengths of the linker molecules.