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Hidrodinámica a nanoescala: flujo mejorado en nanotubos de carbono
Mainak Majumder1, Nitin Chopra, Rodney Andrews
1Chemical and Materials Engineering Department, University of Kentucky, Lexington, Kentucky 40506, USA.
Nature
|November 4, 2005
Resumen
Los investigadores crearon estructuras a nanoescala utilizando nanotubos de carbono alineados que imitan los canales biológicos. El flujo de líquido a través de estas membranas de nanotubos de carbono es excepcionalmente rápido debido a una interfaz casi sin fricción.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Nanotecnología La nanotecnología es la nanotecnología.
- La dinámica de fluidos es la dinámica de fluidos.
Sus antecedentes:
- Los canales celulares biológicos exhiben un transporte altamente selectivo y un flujo rápido.
- Imitar estas propiedades en estructuras artificiales a nanoescala es un desafío científico significativo con un amplio potencial de aplicación.
Objetivo del estudio:
- Para investigar el flujo de líquido a través de membranas compuestas de nanotubos de carbono alineados.
- Determinar si estas estructuras pueden alcanzar caudales comparables a los de los sistemas biológicos.
Principales métodos:
- Fabricación de una membrana que consiste en una matriz de nanotubos de carbono alineados.
- Medición experimental de las velocidades de flujo de líquidos a través de la membrana del nanotubo de carbono.
Principales resultados:
- Las velocidades de flujo de líquidos observadas fueron de cuatro a cinco órdenes de magnitud más rápidas que las predichas por las teorías convencionales de flujo de fluidos.
- El flujo mejorado se atribuye a una interfaz casi sin fricción entre el líquido y las paredes de los nanotubos de carbono.
Conclusiones:
- Las membranas alineadas de nanotubos de carbono pueden facilitar el transporte de líquidos extraordinariamente rápido.
- La interfaz casi sin fricción es el mecanismo clave que impulsa este flujo de alta velocidad.
- Estos hallazgos abren caminos para nuevas aplicaciones en la fluídica a nanoescala.
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