JOURNAL OF APPLIED PHYSICS, v.115, no.5, pp.054315-1 - 054315-4
AMER INST PHYSICS
When implemented on the nanoscale, material flows driven by gradients in temperature, sometimes
known as thermocapillary flows, can be exploited for various purposes, including nanopatterning,
device fabrication, and purification of arrays of single walled carbon nanotubes (SWNTs).
Systematic experimental and theoretical studies on thermocapillary flow in thin polymer films
driven by heating in individual metallic SWNT over a range of conditions and molecular weights
reveal the underlying physics of this process. The findings suggest that the zero-shear viscosity is a
critical parameter that dominates the dependence on substrate temperature and heating power. The
experimentally validated analytical models in this study allow assessment of sensitivity to other
parameters, such as the temperature coefficient of surface tension, the thermal interface
conductance, and the characteristic length scale of the heated zone. 2014 AIP Publishing LLC.