Size-Selected Monodisperse Nanoclusters on Supported Graphene: Bonding, Isomerism, and Mobility

被引：72
|
作者：
Wang, Bo [1 ]
Yoon, Bokwon [2 ]
Koenig, Michael [1 ]
Fukamori, Yves [1 ]
Esch, Friedrich [1 ]
Heiz, Ueli [1 ]
Landman, Uzi [2 ]
机构：
[1] Tech Univ Munich, Dept Chem, D-85748 Garching, Germany
[2] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA
来源：
NANO LETTERS | 2012年 / 12卷 / 11期
关键词：
Size-selected supported Pd clusters; epitaxial graphene Moire substrate; selective adsorption; isomerism-guided diffusion; STM; first-principles DFT calculations; CLUSTERS; SURFACES; DEPOSITION; DIFFUSION; CATALYSTS; RU(0001);
D O I：
10.1021/nl303319f
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Soft-landing of size-selected Pd-n (n <= 20) nanoclusters on a Moire-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.
引用
收藏
页码：5907 / 5912
页数：6
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