Dislocations in nanocrystalline SnO2 thin films
- 1 March 1996
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine Letters
- Vol. 73 (3) , 93-100
- https://doi.org/10.1080/095008396180885
Abstract
Dislocations of Burgers vector (101) in nano-sized SnO2 crystallites have been investigated by high-resolution transmission electron microscopy. They exist either as ordinary dislocations or as extended dislocations. The extended dislocations are composed of a crystallographic shear plane (CSP) and two partial dislocations of Burgers vector (1/2O1/2) . There are two types of the relationship between the orientation (hkl) and the displacement vector [uvw] of the (hkl)[uvw] CSP: firstly ( hkl ) \[ uvw ] and secondly ( hkl ) is not parallel to \[ uvw ]. The CSP is oriented parallel to {1 01} and \[ uvw ] equals (1/2o1/2) . Face-sharing SnO6 octahedra exist at cores of extended dislocations. The local composition at dislocation cores varies with dislocation type and is different from the stoichiometric composition of SnO2.Keywords
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