Shape-dependence of near-field heat transfer between a spheroidal nanoparticle and a flat surface
Institut für Physik, Carl von Ossietzky Universität, 26111 Oldenburg, Germany
Corresponding author: email@example.com
Revised: 12 January 2010
Accepted: 13 January 2010
Published online: 15 March 2010
We study the radiative heat transfer between a spheroidal metallic nanoparticle and a planar metallic sample for near- and far-field distances. In particular, we investigate the shape dependence of the heat transfer in the near-field regime. In comparison with spherical particles, the heat transfer typically varies by factors between 1/2 and 2 when the particle is deformed such that its volume is kept constant. These estimates help to quantify the deviation of the actual heat transfer recorded by a near-field scanning thermal microscope from the value provided by a dipole model which assumes a perfectly spherical sensor.
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