期刊
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
卷 114, 期 2, 页码 557-564出版社
SPRINGER
DOI: 10.1007/s10973-013-3021-7
关键词
Nanofluids; Thermal diffusivity; Mie scattering; Thermal lens; Gold; Silver
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ)
- Fundacao de Amparo a Pesquisa do Estado de Minas Gerais (FAPEMIG)
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES), Brazil
This work focuses on the study of thermal diffusivity and physical properties of nanofluids with very low concentrations of silver or gold nanoparticles. Thermal measurements were performed by means of thermal lens spectroscopy in the dual beam configuration. Improvements of 20 and 16 % in the thermal diffusivity were observed for silver and gold nanofluids, respectively, in comparison with pure water. The estimation of the size distribution of the metallic nanoparticles was obtained through the fitting of the extinction spectra via Mie theory and images of field emission gun scanning electron microscopy.
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