Dore, J.C. and Benfield, R.E. and Grandjean, D. and Schmid, G. and Kroll, M. 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.
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Abstract
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 (UNSPECIFIED) |
|---|---|
| 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: | 11 Mar 2009 22:36 |
| Resource URI: | http://kar.kent.ac.uk/id/eprint/13360 (The current URI for this page, for reference purposes) |
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