期刊
ACS NANO
卷 6, 期 9, 页码 7920-7927出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn3023206
关键词
gold nanoclusters; ultrasmall nanoparticles; monodisperse; carbon monoxide; optical absorption
类别
资金
- Ministry of Education, Singapore [R-279-000-295-133, R-279-000-327-112]
- National University of Singapore
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 (similar to 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.
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