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ABSTRACT
Multiwalled carbon nanotubes (MWCNTs) were successfully coated and filled with Sn using a simple method. Bulk thermal conductivity of Sn/SnO filled and coated multiwalled carbon nanotubes (MWCNTs) of ∼1 mm thickness pellet by laser method reveals surge in hybrid carbon nanotubes in comparison to pristine nanotubes. The thermal diffusivity and thermal conductivity of hybrid nanotubes are increased to 4.41 mm2/sec, 5.39 Wm−1K−1 of as compared to 0.36 mm2/sec and 0.28 Wm−1K−1 of the pristine nanotubes. The enhancement in thermal conductivity is attributed to the presence of Sn coating on surface and inside the carbon nanotubes and the formation of compact structures by reducing the air gaps between nanotubes because of their joining during compression and sintering.
Acknowledgments
The support of this study by the Ministry of Science and Technology (MOST) of the Republic of China (Taiwan) under Grant NSC101-2221-E006-117-MY3 is gratefully acknowledged. One of the authors (J. Mittal) is grateful to MOST for his financial support during the course of this work under Grant NSC102-2811-E-006-048.