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Superior thermal interface via vertically aligned carbon nanotubes grown on graphite foils

  • Sabyasachi Ganguli (a1), Ajit K. Roy (a2), Robert Wheeler (a3), Vikas Varshney (a4), Feng Du (a5) and Liming Dai (a5)...

Abstract

In an attempt to study the thermal transport at the interface between nanotubes and graphene, vertically aligned multiwalled carbon nanotubes (CNTs) were grown on graphite thin film substrates. A systematic cross-sectional probing of the materials’ morphology of the interface by scanning electron microscopy and high-resolution transmission electron microscopy revealed that an excellent bond existed between the nanotubes and the substrate along some fraction of interface. Imaging and electron diffraction analyses performed at the boundary reveal a polycrystalline interfacial structure. Compositional probing along the interface by energy dispersive x-ray spectroscopy revealed that there were no catalyst particles or other impurities present. The estimated interfacial thermal resistance of lower than 5–7.5 (mm2K)/W suggests that this type of CNT/graphite interface could open up multiple routes toward the designing and development of advanced thermal interface materials for aerospace and nano-/microelectronics applications.

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a)Address all correspondence to this author. e-mail: sabyasachi.ganguli@wpafb.af.mil

References

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Superior thermal interface via vertically aligned carbon nanotubes grown on graphite foils

  • Sabyasachi Ganguli (a1), Ajit K. Roy (a2), Robert Wheeler (a3), Vikas Varshney (a4), Feng Du (a5) and Liming Dai (a5)...

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