Electrical power dissipation in carbon nanotubes on single crystal   quartz and amorphous SiO2
  Heat dissipation in electrically biased semiconducting carbon nanotubes (CNTs) on single crystal quartz and amorphous SiO2 is examined with temperature profiles obtained by spatially resolved Raman spectroscopy. Despite the differences in phonon velocities, thermal conductivity and van der Waals interactions with CNTs, on average, heat dissipation into single crystal quartz and amorphous SiO2 is found to be similar. Large temperature gradients and local hot spots often observed underscore the complexity of CNT temperature profiles and may be accountable for the similarities observed. 
Cheng-Lin Tsai, Albert Liao, Eric Pop and Moonsub Shim
cond-mat.mes-hall cond-mat.mtrl-sci