title: Novel insights into nanopore deformation caused by capillary condensation.
abstract: By means of in situ small-angle x-ray diffraction experiments and semi-grand-canonical ensemble Monte Carlo simulations we demonstrate that sorption and condensation of a fluid confined within nanopores is capable of deforming the pore walls. At low pressures the pore is widened due to a repulsive interaction caused by collisions of the fluid molecules with the walls. At capillary condensation the pores contract abruptly on account of attractive fluid-wall interactions whereas for larger pressures they expand again. These features cannot solely be accounted for by effects related to pore-wall curvature but have to be attributed to fluid-wall dispersion forces instead.
authors.affiliation: Stranski-Laboratorium für Physikalische und Theoretische Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin.
authors.forename: Gerrit
authors.initials: G
authors.lastname: Günther
authors.forename: Johannes
authors.initials: J
authors.lastname: Prass
authors.forename: Oskar
authors.initials: O
authors.lastname: Paris
authors.forename: Martin
authors.initials: M
authors.lastname: Schoen