title: Pore shape and sorption behaviour in mesoporous ordered silica films.
abstract: Mesoporous silica films templated by pluronic P123 were prepared using spin and dip coating. The ordered cylindrical structure within the films deforms due to shrinkage during calcination. Grazing-incidence small-angle X-ray scattering (GISAXS) measurements reveal that both the unit cell and the cross section of the pores decrease in size, mainly normal to the surface of the substrate, leading to elliptical cross sections of the pores with axis ratios of about 1:2. Water take-up by the pores upon changing the relative humidity can be monitored quantitatively by the shift in the critical angle of X-ray reflection as seen by the Yoneda peak.
authors.affiliation: Institute of Physics, Montanuniversität Leoben, Franz-Josef-Strasse 18, 8700 Leoben, Austria.
authors.forename: Gerhard
authors.initials: G
authors.lastname: Fritz-Popovski
authors.affiliation: Institute of Physics, Montanuniversität Leoben, Franz-Josef-Strasse 18, 8700 Leoben, Austria.
authors.forename: Roland
authors.initials: R
authors.lastname: Morak
authors.affiliation: Institute of Physics, Montanuniversität Leoben, Franz-Josef-Strasse 18, 8700 Leoben, Austria; Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany.
authors.forename: Parvin
authors.initials: P
authors.lastname: Sharifi
authors.affiliation: Institute for Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9/V, A-8010 Graz, Austria.
authors.forename: Heinz
authors.initials: H
authors.lastname: Amenitsch
authors.affiliation: Institute of Physics, Montanuniversität Leoben, Franz-Josef-Strasse 18, 8700 Leoben, Austria.
authors.forename: Oskar
authors.initials: O
authors.lastname: Paris
keywords: GISAXS; dip coating; grazing-incidence small-angle X-ray scattering; mesoporous silica films; pore shape; sorption behaviour; spin coating