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Proceedings Paper

Spatial thermal inhomogeneities as a source of Brownian motion
Author(s): Sergey N. Bagayev; Valery A. Orlov; Sergey V. Panov
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Paper Abstract

Experimental investigations of the thermal diffusion motion of individual probe microparticles in various liquids have been carried out by using the phase-sensitive laser method of light-scattering spectroscopy. It has been shown that at observation times τ ≥ 1s there is a good agreement between the obtained experimental data and the well-known Einstein-Smoluchowski linear law of Brownian motion (see manuscript for equation). At small observation times τ<<1 s, the square law of motion (see manuscript for equation) is valid. The molecular cooperative mechanism of action of the liquid on a microparticle as a result of relaxation of thermal spatial inhomogeneities is discussed.

Paper Details

Date Published: 9 July 2007
PDF: 6 pages
Proc. SPIE 6727, ICONO 2007: Nonlinear Laser Spectroscopy and High-Precision Measurements; and Fundamentals of Laser Chemistry and Biophotonics, 67270T (9 July 2007); doi: 10.1117/12.752305
Show Author Affiliations
Sergey N. Bagayev, Institute of Laser Physics (Russia)
Valery A. Orlov, Institute of Laser Physics (Russia)
Sergey V. Panov, Institute of Laser Physics (Russia)


Published in SPIE Proceedings Vol. 6727:
ICONO 2007: Nonlinear Laser Spectroscopy and High-Precision Measurements; and Fundamentals of Laser Chemistry and Biophotonics

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