Enhanced Immobilization of Gold Nanoclusters on Graphite

The immobilization of individual biological molecules by metal nanoparticles requires that the particles themselves be immobilized. We introduce a new technique for immobilization of gold clusters based on their binding to small tunnels in a graphite support, themselves created by the implantation o...

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Bibliographic Details
Published in:The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Molecules, spectroscopy, kinetics, environment, & general theory, 2014-09, Vol.118 (37), p.8182-8187
Main Authors: Rodríguez-Zamora, P, Yin, F, Palmer, R. E
Format: Article
Language:English
Subjects:
Argon - chemistry
Gold - chemistry
Graphite - chemistry
Metal Nanoparticles - chemistry
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Summary:The immobilization of individual biological molecules by metal nanoparticles requires that the particles themselves be immobilized. We introduce a new technique for immobilization of gold clusters based on their binding to small tunnels in a graphite support, themselves created by the implantation of small clusters. These tunnels are shown to perform as more effective cluster immobilization sites than point defects on the surface of graphite. The method is tested with atomic force microscopy (AFM) (both contact and noncontact mode) scanning. Size-selected clusters with 923, 561, 309, and 147 atoms have been immobilized and imaged with high-resolution, noncontact AFM.
ISSN:1089-5639
1520-5215
DOI:10.1021/jp500914x