Single-crystal transformation of sphalerite CdS to cubic phaseCuxS
| Autor: | E. Grünbaum, Guy Deutscher, Carmi Feldman |
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| Rok vydání: | 1991 |
| Předmět: |
Materials science
General Physics and Astronomy Surfaces and Interfaces General Chemistry engineering.material Condensed Matter Physics Epitaxy Transformation (music) Surfaces Coatings and Films Crystallography Sphalerite Transmission electron microscopy Phase (matter) Stress relaxation engineering Thin film Single crystal |
| Zdroj: | Applied Surface Science. :535-539 |
| ISSN: | 0169-4332 |
| Popis: | Thin films, 800–2000Athick, of single-crystal (100) sphalerite CdS, which were grown epitaxially on single-crystal (100) NaCl substrates and possessed a density of 1012–13 defects/cm2, were converted toCuxS by dipping them in a hot CuCl solution. Transmission electron microscopy of the converted samples revealed a newCuxS cubic phase of high quality (106–7 defects/cm2), while the films remained single crystal despite the transformation process. In-situ TEM studies of the CdS toCuxS transformation were carried out by heating CdS films with CuCl layers on their surfaces. They revealed that the initiation of transformation centres is accompanied by a stress relaxation, in which defect-free CdS grains are created, while the final film quality is determined by the elimination of these grains in the transformation process. The newCuxS cubic phase was found to be stable up to 330°C, even in co-existence with CdS. |
| Databáze: | OpenAIRE |
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