Tailoring the Interaction Strength between Gold Particles and Silica Thin Films via Work Function Control

被引：53

作者：

Martinez, Umberto ^{[2
]}

Jerratsch, Jan-Frederik ^{[1
]}

Nilius, Niklas ^{[1
]}

Giordano, Livia ^{[2
]}

Pacchioni, Gianfranco ^{[2
]}

Freund, Hans-Joachim ^{[1
]}

机构：

[1] Max Planck Gesell, Fritz Haber Inst, Dept Chem Phys, D-14195 Berlin, Germany

[2] Univ Milan, Dipartimento Sci Mat, I-20125 Milan, Italy

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 05期

关键词：

NANOPARTICLES; SURFACES; ATOMS;

D O I：

10.1103/PhysRevLett.103.056801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The possibility to modify the adsorption properties of a porous silica/Mo(112) film by controlling its work function has been studied by a combined STM and density-functional theory approach. While the original film is inert towards metal adsorption, Au atoms and clusters can be stabilized on the surface after Li doping. The Li atoms penetrate the topmost silica layer and bind as Li+ cations at the metal-oxide interface, thereby reducing the oxide work function. This induces a charge transfer into Au adatoms, which in turn enables strong Au-silica interaction mediated by a polaronic distortion of the oxide lattice.

引用

页数：4

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