Atomic Structure Control of Size-Selected Gold Nanoclusters during Formation

详细信息    查看全文

• 作者：Simon R. Plant ; Lu Cao ; Richard E. Palmer
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：May 28, 2014
• 年：2014
• 卷：136
• 期：21
• 页码：7559-7562
• 全文大小：210K
• 年卷期：v.136,no.21(May 28, 2014)
• ISSN：1520-5126

文摘

We report the ability to control the atomic structure of nanoclusters by systematically varying the gas-phase formation parameters during the generation of size-selected Au₉₂₃. From aberration-corrected, scanning transmission electron microscopy (HAADF-STEM) imaging, we are able to identify the proportions of icosahedral (Ih), decahedral (Dh), and face-centered cubic (fcc) isomers within a set of populations, with each population corresponding to a specific set of formation conditions. We demonstrate that, by tuning the formation conditions, we can eliminate completely all icosahedral nanoclusters, which are commonly found under other conditions. In future, this approach may lead to the preparation of arrays or ensembles of nanoclusters containing a dominant or single isomer, thus enabling the investigation of nanocluster (or nanoparticle) properties as a function of both size and atomic configuration.