Structural studies of mesoporous alumina membranes by small angle X-ray scattering

Dore, John C. and Benfield, Robert E. and Grandjean, Didier and Schmid, Gunter and Kroll, Michael and Le Bolloc'h, D. (2002) Structural studies of mesoporous alumina membranes by small angle X-ray scattering. In: 6th International Symposium on Characterization of Porous Solids (COPS-VI), MAY 08-11, 2002, Alicante, Spain. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Small-angle X-ray scattering (SAXS) has been used to study the structures of mesoporous alumina membranes. These membranes, produced by anodic deposition, have an arrangement of parallel cylindrical pores centred on a disordered hexagonal lattice. The SAXS intensity profile varies over five orders of magnitude, and is a convolution of a structure factor for the 2D distribution of pore axes with a cylinder form factor for the pores. Rotation of the plane of the membrane changes the pattern from a ring structure for channels parallel to the X-ray beam to a set of vertical spots for channels perpendicular to the beam. The oscillatory pattern changes systematically with the anodic deposition voltage, confirming a linear relationship between voltage and pore separation. Initial results are also reported for alumina membranes containing cobalt nanowires in the pore volume. The SAXS technique complements and extends direct-imaging methods such as electron microscopy, which view only the surface structure for a limited area of the sample. The results indicate that the membranes show greater disorder than normally deduced from other techniques.

Item Type: Conference or workshop item (Paper)
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences
Depositing User: Maggie Francis
Date Deposited: 11 Mar 2009 22:36
Last Modified: 05 Jun 2014 15:28
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