2009/02/19 by Vikram V. Deshpande, Scott Hsieh, Adam Bushmaker +3 · 1 citation
Materials Science · Physics and Astronomy · #Carbon Nanotubes in Composites #Graphene research and applications #Thermal properties of materials #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.102.105501
To appear in Phys. Rev. Lett
arxiv created 2009/02/19 · openalex publication_date 2009/03/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Spatially resolved Raman spectra of individual pristine suspended carbon nanotubes are observed under electrical heating. The Raman G+ and G- bands show unequal temperature profiles. The preferential heating is more pronounced in short nanotubes (2 microm) than in long nanotubes (5 microm). These results are understood in terms of the decay and thermalization of nonequilibrium phonons, revealing the mechanism of thermal transport in these devices. The measurements also enable a direct estimate of thermal contact resistances and the spatial variation of thermal conductivity.