Estimation of the contact area of solids by electrothermal analogy
https://doi.org/10.17586/2220-8054-2015-6-4-547-550
Abstract
A method of thermal measurements has been proposed for determining the real surface contact area. Measurement of the true contact area is somewhat difficult. We propose here a method of contact area measurement, which is, in essence, an idealization of the well-known probe method employed in surface studies. In this study, to determine (estimate!) the fraction of the contact surface area projected onto the plane of a geometrical area of the section of the surface, it is proposed to use the electrothermal analogy. Considered in terms of this analogy, electrical conductance is assumed to correlate with heat transfer. As a result, the real contact area is found to be millions of times smaller than the area of the plane surface.
Supporting agencies: The author expresses gratitude to A. P. Meilakhs for a discussion of Landauer’s relation, as well as to S. A. Chizhik and M. L. Heifets for having made acquaintance with the state of the art of the problem. I am grateful to A. Ya. Vul’ for interest in the work. Support of the RAS Presidium programs “Fundamentals of nanostructure technologies and nanomaterial” and “Quantum mesoscopic and disordered systems”, as well as of RFBR (Grants 14-08-90011 Bel-a) is gratefully acknowledged.
About the Author
E. D. Eidelman
Ioffe Physico-Technical Institute of the Russian Academy of Sciences; Saint Petersburg Chemical-Pharmaceutical Academy
Russian Federation
Russian Federation
Polytechnicheskaya 26, Saint Petersburg, 194021
Popova street 14, Saint Petersburg, 197376
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Review
For citations:
Eidelman E.D. Estimation of the contact area of solids by electrothermal analogy. Nanosystems: Physics, Chemistry, Mathematics. 2015;6(4):547-550. https://doi.org/10.17586/2220-8054-2015-6-4-547-550
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