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Thermal conductivity studies of metal dispersed multiwalled carbon nanotubes in water and ethylene glycol based nanofluids

J. Appl. Phys. 106, 084317 (2009); doi:10.1063/1.3240307

Published 26 October 2009

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Neetu Jha and S. Ramaprabhu
Department of Physics, Alternative Energy and Nanotechnology Laboratory (AENL), Nano Functional Materials Technology Centre (NFMTC), Indian Institute of Technology Madras, Chennai 600036, India
High thermal conducting metal nanoparticles have been dispersed on the multiwalled carbon nanotubes (MWNTs) outer surface. Structural and morphological characterizations of metal dispersed MWNTs have been carried out using x-ray diffraction analysis, high resolution transmission electron microscopy, energy dispersive x-ray analysis, and Fourier transform infrared spectroscopy. Nanofluids have been synthesized using metal-MWNTs in de-ionized water (DI water) and ethylene glycol (EG) base fluids. It has been observed that nanofluids maintain the same sequence of thermal conductivity as that of metal nanoparticles Ag-MWNTs>Au-MWNTs>Pd-MWNTs. A maximum enhancement of 37.3% and 11.3% in thermal conductivity has been obtained in Ag-MWNTs nanofluid with DI water and EG as base fluids, respectively, at a volume fraction of 0.03%. Temperature dependence study also shows enhancement of thermal conductivity with temperature. ©2009 American Institute of Physics
History: Received 26 June 2009; accepted 6 September 2009; published 26 October 2009
Permalink: http://link.aip.org/link/?JAPIAU/106/084317/1
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KEYWORDS and PACS

Keywords
PACS
  • 66.25.+g
    Thermal conduction in nonmetallic liquids
  • 66.70.-f
    Nonelectronic thermal conduction and heat-pulse propagation in solids
  • 82.80.Ej
    X-ray, Mössbauer, and other γ-ray spectroscopic chemical analysis methods
  • 61.48.De
    Structure of carbon nanotubes, boron nanotubes and closely related graphite-like systems
  • 78.67.Ch
    Optical properties of nanotubes
  • 78.30.-j
    Infrared and Raman spectra (condensed matter)
  • YEAR: 2009

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PUBLICATION DATA

ISSN:
0021-8979 (print)   1089-7550 (online)
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