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Grabado selectivo de nanotubos metálicos de carbono por reacción en fase gaseosa
Guangyu Zhang1, Pengfei Qi, Xinran Wang
1Department of Chemistry and Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305, USA.
Science (New York, N.Y.)
|November 11, 2006
Resumen
Los investigadores desarrollaron un método de hidrocarbonización por plasma para eliminar los nanotubos metálicos de carbono, produciendo nanotubos puramente semiconductores para transistores avanzados. Este proceso escalable mejora la fabricación de semiconductores para futuros circuitos integrados.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Nanotecnología La nanotecnología es la nanotecnología.
- Ingeniería Química Ingeniería Química.
Sus antecedentes:
- A medida que los materiales de nanotubos de carbono crecen, por lo general contienen una mezcla de tipos metálicos y semiconductores.
- La separación de estos tipos es crucial para los dispositivos electrónicos de alto rendimiento.
Objetivo del estudio:
- Desarrollar un método selectivo para la eliminación de nanotubos metálicos de carbono.
- Para obtener nanotubos de carbono semiconductores de alta pureza para aplicaciones electrónicas.
Principales métodos:
- Utilizando una reacción de hidrocarbonización de plasma en fase gaseosa.
- Empleando un proceso de grabado químico "seco" dependiente del diámetro y la metalicidad.
Principales resultados:
- Logró grabado selectivo y gasificación de nanotubos metálicos de carbono.
- Nanotubos semiconductores retenidos en una forma casi prístina.
- Produjo nanotubos 100% puramente semiconductores para transistores de alta corriente.
Conclusiones:
- La hidrocarbonatación con plasma desarrollada es un método escalable y eficaz para la purificación de nanotubos de carbono semiconductores.
- Esta técnica es compatible con el procesamiento de semiconductores existente, allanando el camino para los circuitos integrados.
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