Study of thermal diffusivity of nanofluids with bimetallic nanoparticles with Au(core)/Ag(shell) structure

被引：26
|
作者：
Gutierrez Fuentes, R. [1 ]
Pescador Rojas, J. A. [1 ]
Jimenez-Perez, J. L. [1 ]
Sanchez Ramirez, J. F. [1 ,2 ]
Cruz-Orea, A. [2 ]
Mendoza-Alvarez, J. G. [2 ]
机构：
[1] IPN, CICATA, Mexico City 11500, DF, Mexico
[2] CINVESTAV, IPN, Dept Fis, Mexico City 07360, DF, Mexico
来源：
APPLIED SURFACE SCIENCE | 2008年 / 255卷 / 03期
关键词：
Nanoparticles; Thermal properties of small particle; Transmission electron microscopy (TEM);
D O I：
10.1016/j.apsusc.2008.07.023
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The thermal diffusivity of Au/Ag nanoparticles with core/shell structure, at different compositions (Au/Ag = 3/1, 1/1, 1/3, 1/6), was measured by using the mismatched mode of the dual-beam thermal lens (TL) technique. This study determines the effect of the bimetallic composition on the thermal diffusivity of the nanofluids. In these results we find a lineal increment of the nanofluid it thermal diffusivity when the Ag shell thickness is increased. Our results show that the nanoparticle structure is an important parameter to improve the heat transport in composites and nanofluids. These results could have importance for applications in therapies and photothermal deliberation of drugs. Complementary measurements with UV-vis spectroscopy and TEM, were used to characterize the Au(core)/Ag(shell) nanoparticles. (C) 2008 Elsevier B. V. All rights reserved.
引用
收藏
页码：781 / 783
页数：3
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