Electromagnetic response behavior of binary metallic nanoparticles: a comparison of results from a few models of different schematicity

被引：15

作者：

Bruzzone, S ^{[1
]}

Arrighini, GP ^{[1
]}

Guidotti, C ^{[1
]}

机构：

[1] Univ Pisa, Dept Chem, I-56100 Pisa, Italy

来源：

MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS | 2003年 / 23卷 / 1-2期

关键词：

nanoparticle; alloys; optical properties; theoretical;

D O I：

10.1016/S0928-4931(02)00267-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The light absorption of isolated bimetallic alloy nanoparticles composed of An and Ag is investigated theoretically according to the traditional Mie theory and use of dielectric data. Particular attention is turned to establish the dependence of the absorption on both particle size and composition. The complex dielectric function of clusters involving 254 and 440 active electrons and different stoichiometry has been evaluated on the basis of various models of different degrees of schematicity (Drude theory, noninteracting quantum gas confined in a box, DFT approach), assuming in any case a simple combining rule for the alloy dielectric behavior. The interband contribution to the dielectric function is approximately estimated so as to assess the role of bound-electron effects. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：191 / 200

页数：10

共 34 条

[1] SCATTERING OF ELECTROMAGNETIC WAVES FROM 2 CONCENTRIC SPHERES [J].