Adsorption of helium in a deformed pore

E. S. HERNÁNDEZ

JOURNAL OF LOW TEMPERATURE PHYSICS

SPRINGER/PLENUM PUBLISHERS

Año: 2011 vol. 162 p. 590 - 596

0022-2291

The adsorption potential in the interior of an infinite  nanopore along the $z$--axis, with varying radius $R(z)$, is derived as a function of a deformation parameter. Detailed calculations for a carbon   nanotube indicate that according to the magnitude of  the deformation the potential landscape  can be substantially modified, giving rise to regions of weakened confining strength, and even changing the nature of the minima. This  modified field may induce thermodynamic instabilities in  the adsorbed fluid. A similar situation takes place for other materials, such as   alkaline pores with variable cross--section. A general argument can be provided that explains the origin of such instabilities. PACS numbers: 67.25.dp,67.25.dr,68.08.Bc