Thermophoresis of graphene plates in an air medium is discussed within the framework of a molecular-kinetic approach. Its rate is found to be independent of the plate area and the aspect ratio of a rectangular graphene. It does depend on the plate orientation in space, which is controlled by the principle of least resistance. The dependence is expressed via a geometrical parameter σ, whose limiting values within the variation interval are found to be 0.46 and 0.65. A solution of the Euler problem on the Brownian rotation of a plate around its center of mass as a result of collisions of molecules in the temperature gradient field allowed us to obtain for the graphene plates a statistical average of σ =0.5. This value turned out to be the same as the one for spherical nanoparticles, for which rotations are irrelevant.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 7, pp. 87–92, July, 2014.
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Bubenchikov, A.M., Bubenchikov, M.A., Potekaev, A.I. et al. Thermophoresis of Graphene Plates. Russ Phys J 57, 956–962 (2014). https://doi.org/10.1007/s11182-014-0330-7
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DOI: https://doi.org/10.1007/s11182-014-0330-7