Size-Selected Monodisperse Nanoclusters on Supported Graphene: Bonding, Isomerism, and Mobility
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- 作者：Bo Wang ; Bokwon Yoon ; Michael K枚nig ; Yves Fukamori ; Friedrich Esch ; Ueli Heiz ; Uzi Landman
- 刊名：Nano Letters
- 出版年：2012
- 出版时间：November 14, 2012
- 年：2012
- 卷：12
- 期：11
- 页码：5907-5912
- 全文大小：388K
- 年卷期：v.12,no.11(November 14, 2012)
- ISSN：1530-6992
文摘
Soft-landing of size-selected Pdn (n 鈮?20) nanoclusters on a Moir茅-patterned surface of graphene adsorbed on Ru(0001) leads to controlled formation of a truly monodisperse cluster-assembled material. Combined scanning tunneling microscopy and first-principles calculations allow identification of selective adsorption sites, characterization of size-dependent cluster isomers, and exploration of interconversion processes between isomeric forms that manifestly influence cluster surface mobility. Surface-assembled cluster superstructures may be employed in nanocatalytic applications, as well as in fundamental investigations of physical factors controlling bonding, structure, isomerism, and surface mobilities of surface-supported clusters.