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arXiv · 1103.5039

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

Oliver Huth·Felix Rüting·Svend-Age Biehs·Martin Holthaus
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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.

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Oliver Huth, Felix Rüting, Svend-Age Biehs, Martin Holthaus. 2011-03-25. Shape-dependence of near-field heat transfer between a spheroidal nanoparticle and a flat surface. https://doi.org/10.1051/epjap%2F2010027

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