Physics

Kinetic models of gas adsorption by carbon nanotubes

S. V. Bulyarskii^a, A. S. Basaev^b, A. N. Saurov<sup>bc

a</sup> Ulyanovsk State University, Ulyanovsk
^b SSC RF «NPC Technology Center», Moscow
^c Institute of Nanotechnologies of Microelectronics, Russian Academy of Sciences

Abstract: The paper presents a mathematical model of desorption from nanotubes, which has been tested using experimental data on oxygen desorption. For nanotubes, it was possible to isolate desorption processes from four different locations and determine the probability of desorption. It is shown that there is a repulsive barrier for physical adsorption by nanotubes, which determines the reaction mechanism of capture. The developed mathematical model makes it possible to determine separately the kinetic coefficients for desorption of differently arranged molecules and reduces possible systematic errors in the analysis of experimental results.

UDC: 621.315