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Title: Observation of cluster size growth in CO-directed synthesis of Au 25(SR) 18 nanoclusters
Authors: Yu, Y.
Luo, Z.
Yu, Y.
Lee, J.Y. 
Xie, J. 
Keywords: carbon monoxide
gold nanoclusters
optical absorption
ultrasmall nanoparticles
Issue Date: 25-Sep-2012
Citation: Yu, Y., Luo, Z., Yu, Y., Lee, J.Y., Xie, J. (2012-09-25). Observation of cluster size growth in CO-directed synthesis of Au 25(SR) 18 nanoclusters. ACS Nano 6 (9) : 7920-7927. ScholarBank@NUS Repository.
Abstract: The design of an efficient synthesis for large-scale production of atomically precise nanoclusters (NCs) is pivotal in realizing the size-dependent properties of the NCs. A simple and versatile method for producing atomically precise thiolated gold NCs (Au 25(SR) 18 NCs) in large quantities (∼200 mg) is demonstrated in this study. It uses a gaseous reducing agent, carbon monoxide (CO), to support a slow and size-controlled growth of Au 25(SR) 18 NCs. Absorption measurements of the reaction solution, which underwent distinct color changes (colorless → yellow → orange → brown → red-brown), allowed the formation of thiolated Au 25 NCs to be reconstructed from several key intermediates. The unique reaction environment provided by gaseous CO presents a new synthetic route to fabricate atomically precise metal NCs in quantities large enough for application explorations. © 2012 American Chemical Society.
Source Title: ACS Nano
ISSN: 19360851
DOI: 10.1021/nn3023206
Appears in Collections:Staff Publications

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