Pore shape and sorption behaviour in mesoporous ordered silica films

Gerhard Fritz-Popovski*, Roland Morak, Parvin Sharifi, Heinz Amenitsch, Oskar Paris

*Korrespondierende/r Autor/in für diese Arbeit

Publikation: Beitrag in einer FachzeitschriftArtikel

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

Originalspracheenglisch
Seiten (von - bis)1713-1720
Seitenumfang8
FachzeitschriftJournal of Applied Crystallography
Jahrgang49
Ausgabenummer5
DOIs
PublikationsstatusVeröffentlicht - 1 Okt 2016

ASJC Scopus subject areas

  • !!Materials Science(all)

Fields of Expertise

  • Advanced Materials Science

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