Thermal characterization of nanofluids using laser induced thermal lens technique

Achamma Kurian; Rajesh B. Kumar; Sajan D. George

doi:10.1117/12.826233

1 September 2009 Thermal characterization of nanofluids using laser induced thermal lens technique

Achamma Kurian, Rajesh B. Kumar, Sajan D. George

Proceedings Volume 7393, Nanophotonic Materials VI; 73930U (2009) https://doi.org/10.1117/12.826233
Event: SPIE NanoScience + Engineering, 2009, San Diego, California, United States

Abstract

A laser induced thermal lens technique has been employed to evaluate the dynamic thermal parameter, the thermal diffusivity, of gold nanofluids. Gold nanoparticles were synthesized by citrate reduction of HAuCl₄ in water. The UVVIS optical absorption spectra show an absorption peak around 540 nm owing to surface Plasmon resonance band of the gold particles. The thermal diffusivity of gold nanoparticles was evaluated by knowing the time constant of transient thermal lens obtained by fitting the experimental curve to the theoretical model of the mode-matched thermal lens. Analyses of the results show that the nanofluid exhibits lower thermal diffusivity value in comparison to the host medium, water. Further investigations also reveal that the concentration of nanoparticles in the fluid have influence on the measured thermal diffusivity value. Results are interpreted in terms of interfacial thermal resistance around the nanoparticles as well as on the clustering of nanoparticles.

Citation Download Citation

Achamma Kurian, Rajesh B. Kumar, and Sajan D. George "Thermal characterization of nanofluids using laser induced thermal lens technique", Proc. SPIE 7393, Nanophotonic Materials VI, 73930U (1 September 2009); https://doi.org/10.1117/12.826233

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