Chemically induced metal-to-insulator transition in Au55 clusters:: effect of stabilizing ligands on the electronic properties of nanoparticles -: art. no. 276401

被引：60

作者：

Boyen, HG ^{[1
]}

Kästle, G

Weigl, F

Ziemann, P

Schmid, G

Garnier, MG

Oelhafen, P

机构：

[1] Univ Ulm, Abt Festkorperphys, D-89069 Ulm, Germany

[2] Univ Essen Gesamthsch, Inst Anorgan Chem, D-45117 Essen, Germany

[3] Univ Basel, Inst Phys, CH-4056 Basel, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 27期

关键词：

D O I：

10.1103/PhysRevLett.87.276401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The cluster compound Au-55(PPh3)(12)Cl-6 has been reanalyzed by photoelectron spectroscopy giving direct evidence for a nonmetallic behavior of the individual Au clusters as long as their E.-and shell remains intact. The exposure to x-rays during the measurements is found to partly decompose the shell by removal of the chlorine atoms, resulting in a metallic behavior of the clusters as demonstrated by a steplike intensity at the Fermi energy. These observations resolve a long-standing controversy about the metallic behavior of ligated Au clusters emphasizing, in addition, the influence of the local environment on the electronic properties of nanoscaled materials.

引用

页码：276401 / 1

页数：4

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