Optical and thermal investigation of GeO2-PbO thin films doped with Au and Ag nanoparticles

被引：11
作者：
Carvalho, E. A. [1 ]
Carmo, A. P. [1 ]
Bell, M. J. V. [1 ]
Anjos, V. [1 ]
Kassab, L. R. P. [2 ]
da Silva, D. M. [3 ]
机构：
[1] Univ Fed Juiz de Fora, Lab Espect Mat, Dept Fis, Juiz De Fora, MG, Brazil
[2] Fac Tecnol Sao Paulo, Lab Tecnol Mat Foton & Optoeletron, Sao Paulo, Brazil
[3] Univ Sao Paulo, Dept Engn Sistemas Eletron, Escola Politecn, BR-09500900 Sao Paulo, Brazil
来源：
THIN SOLID FILMS | 2012年 / 520卷 / 07期
基金：
巴西圣保罗研究基金会;
关键词：
Germanate; Thin films; Raman spectroscopy; Thermal lens; Thermal diffusivity; Silver nanoparticles; Gold nanoparticles; Sputtering; GLASSES; SILVER; CONDUCTIVITY; ENHANCEMENT;
D O I：
10.1016/j.tsf.2011.11.031
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The present work reports on the thermo-optical study of germanate thin films doped with Au and Ag nanoparticles. Transmission Electron Microscopy images, UV-visible absorption and Micro-Raman scattering evidenced the presence of nanoparticles and the formation of collective excitations, the so called surface plasmons. Moreover, the effects of the metallic nanoparticles in the thermal properties of the films were observed. The thermal lens technique was proposed to evaluate the Thermal Diffusivity (D) of the samples. It furnishes superficial spatial resolution of about 100 mu m, so it is appropriate to study inhomogeneous samples. It is shown that D may change up to a factor 3 over the surface of a film because of the differences in the nanoparticles concentration distribution. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：2667 / 2671
页数：5
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