Shape-dependence of near-field heat transfer between a spheroidal nanoparticle and a flat surface

Author(s): O. Huth, F. Rueting, S.-A. Biehs, M. Holthaus
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Article: Eur. Phys. J. Appl. Phys. 50, 10603 (2010), EDP Sciences
Keywords: spheroidal nanoparticle, near-field, radiative heat transfer
Abstract:: 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.
URL: http://www.physik.uni-oldenburg.de/condmat/Biehs/pubs/p_epjap10.pdf (text/plain)