Thermo-optical properties of silver and gold nanofluids

• Published in: Journal of thermal analysis and calorimetry Vol. 114; no. 2; pp. 557 - 564
• Main Authors: Moreira, Lyane M., Carvalho, E. A., Bell, M. J. V., Anjos, V., Sant’Ana, A. C., Alves, Ana Paula P., Fragneaud, B., Sena, L. A., Archanjo, B. S., Achete, C. A.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.11.2013; Springer
• Subjects: Analytical Chemistry; Calorimetry; Chemistry; Chemistry and Materials Science; Colloidal state and disperse state; Exact sciences and technology; General and physical chemistry; General, apparatus, technics of preparation; Gold; Inorganic Chemistry; Measurement Science and Instrumentation; Nanocomposites; Nanofluids; Nanomaterials; Nanoparticles; Nanostructure; Nanotechnology; Optical properties; Physical Chemistry; Polymer Sciences; Scanning devices; Silver; Thermal diffusivity; Thermal properties; Gold; Silver; Thermal diffusivity; Mie scattering; Thermal lens; Nanofluids; Scanning electron microscopy; Nanoparticle; Transition metal; Field emission microscopy; Surface structure; Thermal properties; Aqueous medium; Colloidal suspension; Morphology; Optical properties
• ISSN: 1388-6150; 1588-2926; 1572-8943
• DOI: 10.1007/s10973-013-3021-7

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.