The diffusive process of dispersed particles in a semi-infinite cell of an anisotropic fluid limited by an adsorbing surface is theoretically investigated. The densities of bulk and surface particles are analytically determined, taking into account the conservation of the number of particles immersed in the sample. It is shown that an anomalous diffusion process can take place according to the time scale considered. For short time interval there is a sub-diffusion process, followed by a super-diffusive regime. For large time interval the diffusive process tends to a normal behavior. The analysis is suitable for the description of the adsorption phenomena of neutral as well as charged particles in anisotropic media. Copyright © 2009 EPLA.

Lenzi, E., Evangelista, L., Barbero, G., Mantegazza, F. (2009). Anomalous diffusion and the adsorption-desorption process in anisotropic media. EUROPHYSICS LETTERS, 85(2) [10.1209/0295-5075/85/28004].

Anomalous diffusion and the adsorption-desorption process in anisotropic media

MANTEGAZZA, FRANCESCO
2009

Abstract

The diffusive process of dispersed particles in a semi-infinite cell of an anisotropic fluid limited by an adsorbing surface is theoretically investigated. The densities of bulk and surface particles are analytically determined, taking into account the conservation of the number of particles immersed in the sample. It is shown that an anomalous diffusion process can take place according to the time scale considered. For short time interval there is a sub-diffusion process, followed by a super-diffusive regime. For large time interval the diffusive process tends to a normal behavior. The analysis is suitable for the description of the adsorption phenomena of neutral as well as charged particles in anisotropic media. Copyright © 2009 EPLA.
Articolo in rivista - Articolo scientifico
Transition state theory and statistical theories of rate constants; Diffusion and thermal diffusion; Transport processes
English
2009
85
2
none
Lenzi, E., Evangelista, L., Barbero, G., Mantegazza, F. (2009). Anomalous diffusion and the adsorption-desorption process in anisotropic media. EUROPHYSICS LETTERS, 85(2) [10.1209/0295-5075/85/28004].
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/6240
Citazioni
  • Scopus 24
  • ???jsp.display-item.citation.isi??? 22
Social impact