Electric field control of structure, dimensionality, and reactivity of gold nanoclusters on metal-supported MgO films

被引：58

作者：

Yoon, Bokwon ^{[1
]}

Landman, Uzi ^{[1
]}

机构：

[1] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.100.056102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Electric field control of the structure, dimensionality, and reactivity of gold nanoclusters (Au-20) deposited on MgO films of various thicknesses supported on Ag(100) are introduced and studied using first-principles electronic structure calculations. Field-controlled interfacial charging and field-induced dimensionality crossover are predicted. For a field E-z=1 V/nm, an optimal planar Au-20 island on MgO(8 layers)/Ag(100) is determined, while for E-z=0, the preferred structure of the cluster is a tetrahedron. Field control of the reactivity of the adsorbed nanocluster with O-2 is discussed.

引用

页数：4

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