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Las nanocintas de óxidos semiconductores
1School of Materials Science and Engineering, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA.
Science (New York, N.Y.)
|March 10, 2001
Resumen
Los investigadores sintetizaron nanocinturones de óxido semiconductor ultralargos utilizando una simple evaporación a alta temperatura. Estos nanobeltos puros y monocristalinos son ideales para el estudio del transporte confinado y la construcción de dispositivos a nanoescala.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Nanotecnología La nanotecnología es la nanotecnología.
- Química del estado sólido.
Sus antecedentes:
- Los óxidos semiconductores son cruciales para los dispositivos electrónicos.
- La comprensión de las propiedades a nanoescala requiere una síntesis controlada de nanoestructuras uniformes.
- Los métodos de síntesis anteriores a menudo producían materiales menos uniformes o ricos en defectos.
Objetivo del estudio:
- Desarrollar un método sencillo y eficaz para sintetizar nanobeltas de óxido semiconductor ultralargas y de alta calidad.
- Para caracterizar las propiedades estructurales de estos nuevos nanobelts.
- Explorar sus aplicaciones potenciales en investigación fundamental y fabricación de dispositivos.
Principales métodos:
- Evaporación a alta temperatura de polvos comerciales de óxidos metálicos.
- Caracterización de nanoestructuras sintetizadas utilizando microscopía electrónica y otras técnicas.
Principales resultados:
- Se han sintetizado con éxito nanoestructuras ultralargas, tipo cinturón (nanobeltas) de óxidos de zinc, estaño, indio, cadmio y galio.
- Los nanobeltos de óxido son puros, estructuralmente uniformes, monocristalinos y en gran medida libres de defectos.
- Se exhiben secciones transversales rectangulares (ancho de 30 a 300 nm, relación anchura / espesor de 5 a 10) y longitudes de hasta milímetros.
- La morfología tipo cinturón es una característica común de varios óxidos semiconductores.
Conclusiones:
- Un método sencillo de evaporación a alta temperatura produce nanobeltas de óxido semiconductor de alta calidad.
- Estos nanobelts ofrecen una plataforma prometedora para investigar fenómenos de transporte dimensionalmente confinados.
- Los nanobeltos sintetizados son adecuados para la construcción de dispositivos funcionales en el nivel de la nanoestructura individual.
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