Thermal characterization of nanofluids using laser induced thermal lens technique

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

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.

Original languageEnglish
Title of host publicationNanophotonic Materials VI
Volume7393
DOIs
Publication statusPublished - 02-11-2009
EventNanophotonic Materials VI - San Diego, CA, United States
Duration: 02-08-200903-08-2009

Conference

ConferenceNanophotonic Materials VI
CountryUnited States
CitySan Diego, CA
Period02-08-0903-08-09

All Science Journal Classification (ASJC) codes

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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