INFLUENCE OF THE PHYSICAL PROPERTIES
OF THE MATERIAL OF NANOPARTICLES
ON THEIR DIFFUSION IN RAREFIED GASES

V. Ya. Rudyak, S. L. Krasnolutskii,
and E. N. Ivashchenko

UDC 533.6.011.8;536.75;536-12.01

The influence of the physical properties of nanoparticle 
materials and the parameters of the molecule-particle-interaction 
potential on the diffusion of nanoparticles has been studied on the 
basis of kinetic theory. It has been established that unlike Brownian 
particles, the diffusion of fairly small nanoparticles is substantially 
dependent on their material. This effect becomes stronger with growth 
in the carrier-gas temperature. In all cases the use of the well-known 
Cunningham-Milliken-Davies correlation brings about considerable 
errors in determining the diffusion coefficient of nanoparticles.

Novosibirsk State University of Architecture and Construction, 
113 Ul. Leningradskaya, Novosibirsk, 630008, Russia. Translated 
from Inzhenerno-Fizicheskii Zhurnal, Vol. 81, No. 3, pp. 496-500, 
May-June, 2008. Original article submitted December 18, 2006.