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      Pore shape and sorption behaviour in mesoporous ordered silica films1

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          Abstract

          The shape and sorption behaviour of pores in mesoporous ordered silica films are determined from grazing-incidence small-angle X-ray scattering data.

          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.

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          Author and article information

          Journal
          Journal ID (nlm-ta): J Appl Crystallogr
          Journal ID (iso-abbrev): J Appl Crystallogr
          Journal ID (publisher-id): J. Appl. Cryst.
          Title: Journal of Applied Crystallography
          Publisher: International Union of Crystallography
          ISSN (Print): 0021-8898
          ISSN (Electronic): 1600-5767
          Publication date Collection: 01 October 2016
          Publication date (Electronic): 23 September 2016
          Publication date PMC-release: 23 September 2016
          Volume: 49
          Issue: Pt 5 ( publisher-idID: j160500 )
          Pages: 1713-1720
          Affiliations
          [a ]Institute of Physics, Montanuniversität Leoben, Franz-Josef-Strasse 18, 8700 Leoben, Austria
          [b ]Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
          [c ]Institute for Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9/V, A-8010 Graz, Austria
          Author notes
          Article
          Publisher ID: aj5278 Coden ID: JACGAR Publisher Item ID: S1600576716013698
          DOI: 10.1107/S1600576716013698
          PMC ID: 5045732
          SO-VID: 1f9a82b6-ab0a-4649-9e00-793601e5288c
          Copyright © © Gerhard Fritz-Popovski et al. 2016
          License:

          This is an open-access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.

          History
          Date received : 23 March 2016
          Date accepted : 25 August 2016
          Categories
          Subject: Research Papers

          ScienceOpen disciplines: Analytical chemistry
          Keywords: sorption behaviour,pore shape,mesoporous silica films,grazing-incidence small-angle x-ray scattering,gisaxs,spin coating,dip coating
          Data availability:
          ScienceOpen disciplines: Analytical chemistry
          Keywords: sorption behaviour, pore shape, mesoporous silica films, grazing-incidence small-angle x-ray scattering, gisaxs, spin coating, dip coating

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