Anomalous adsorption behavior observed during the characterization of a polystyrene film prepared on a mesoporous material Baliteau, Sebastien Navarrete Casas, Ricardo Llewellyn, Philip Discrepancies in the results obtained during the adsorption of nitrogen, argon, and water on two mesoporous samples are compared and contrasted. A silica-based mesoporous oxide and the same sample coated with a film of polystyrene were chosen with respect to their different surface chemistries. The nitrogen BET surface is overestimated on the pure silica sample and underestimated for the polymer-coated sample. These differences can be related to the specific interaction (strong or weak) of nitrogen with these surfaces. Water has difficulty in wetting either surface. Moreover, in the case of the polymer-coated material, water is unable to fill the mesopores via capillary condensation. 2025-03-31T10:23:31Z 2025-03-31T10:23:31Z 2004-07-01 journal article S. Baliteau et al. / Journal of Colloid and Interface Science 275 (2004) 48–52. doi:10.1016/j.jcis.2004.01.011 https://hdl.handle.net/10481/103344 10.1016/j.jcis.2004.01.011 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ embargoed access Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier