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J Colloid Interface Sci. 2010 Sep 1;349(1):434-7. doi: 10.1016/j.jcis.2010.05.086. Epub 2010 Jun 1.

Thermo-physical property measurement of nano-gold dispersed water based nanofluids prepared by chemical precipitation technique.

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  • 1Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Kharagpur, WB 721 302, India.


Nano-gold dispersed water based nanofluid has been prepared following the chemical reduction method. Crystallite size, particle size/shape/morphology, and purity of the nanoparticles have been characterized using X-ray diffraction, scanning and transmission electron microscopy and energy dispersion spectroscopy, respectively. The degree of thermal conductivity enhancement of the nanofluid (with respect to the base fluid) as a function of concentration and size of gold nanoparticle has been determined using the transient hot-wire technique. The degree of enhancement increases with increase in concentration and decrease in size of nanoparticles. The maximum enhancement recorded is approximately 48% at 0.00026 vol.% concentration and 21nm average particle size.

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