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The Use of Chemostats in Microbial Systems Biology
Published on: October 14, 2013
Ajuste entre la mezcla y la reactividad en el sistema Ge-Sn utilizando presión y temperatura
Christophe Guillaume1, George Serghiou, Andrew Thomson
1School of Engineering and Centre for Materials Science, University of Edinburgh, Mayfield Road EH9 3JL UK.
Journal of the American Chemical Society
|June 4, 2009
Resumen
Los investigadores sintetizaron el primer cristal de germanio-estaño (GeSn) a granel. Esta nueva solución sólida se creó bajo alta presión y temperatura, permitiendo nuevas posibilidades de materiales.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Física del estado sólido Física del estado sólido
- La cristalografía es una técnica de cristalografía.
Sus antecedentes:
- Anteriormente no se había confirmado la existencia de cristales de germanio-estaño (GeSn) a granel.
- El germanio (Ge) y el estaño (Sn) exhiben propiedades electrónicas y estructurales similares alrededor de 10 Gigapascals (GPa).
Objetivo del estudio:
- Para sintetizar y caracterizar la primera solución sólida de GeSn a granel.
- Para investigar las propiedades estructurales y electrónicas de GeSn bajo alta presión.
Principales métodos:
- Los experimentos de síntesis de alta presión se llevaron a cabo a 10 GPa y 1500 K.
- El recocido post-síntesis se realizó a 770 K.
- Los análisis ex situ incluyeron microscopía electrónica de transmisión (TEM), microscopía electrónica de barrido (SEM) y difracción de rayos X (XRD).
Principales resultados:
- Se recuperó con éxito una solución sólida Ge{0.9}Sn{0.1}.
- La estructura cristalina fue identificada como el grupo espacial P4(3)2(1)2 con parámetros de celosía a = 6.014(1) Å y c = 7.057(1) Å.
- La celda unitaria contiene Z = 12 unidades de fórmula.
Conclusiones:
- El estudio demuestra la viabilidad de sintetizar soluciones sólidas de GeSn a granel.
- El material de GeSn recuperado posee una estructura cristalina única bajo las condiciones aplicadas.
- Este trabajo abre caminos para explorar aleaciones de GeSn en diversas aplicaciones tecnológicas.
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