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Possible differences between the surface and bulk structure of glasses |
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| Authors: | Isak Avramov Thomas Höche Grant S Henderson |
| Institution: | 1. Institute of Physical Chemistry, Bulgarian Academy of Sciences, G. Bonchev Street, Block 11, 1113 Sofia, Bulgaria;2. Leibniz-Institut für Oberflächenmodifizierung e.V., Permoserstraße 15, D-04318 Leipzig, Germany;3. Department of Geology, University of Toronto, 22 Russell Street, Toronto, Ontario, Canada M5S 3B1 |
| Abstract: | Changes in cation co-ordination at glass surfaces (indicating an increase of the oxygen-to-cation ratio within the topmost superficial layers) are evidenced by comparing data acquired by spectroscopic techniques of different excitation depth. Based on these experimental results, a theoretical model is developed that predicts structural discrepancies between surface and bulk structure. Such reconstructed surfaces are of great importance for all kind of surface-related crystallization phenomena. |
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