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Autoensamblaje de matrices ordenadas, robustas y tridimensionales de oro, nanocristales y sílice
Hongyou Fan1, Kai Yang, Daniel M Boye
1Sandia National Laboratories, Chemical Synthesis and Nanomaterials Department, Advanced Materials Laboratory, 1001 University Boulevard SE, Albuquerque, NM 87106, USA. hfan@sandia.gov
Science (New York, N.Y.)
|April 24, 2004
Resumen
Hemos sintetizado una nueva mesofasa de nanocristales (NC) utilizando NC de oro autoensamblador en una matriz de sílice. Esta estructura ordenada exhibe propiedades sintonizables y potencial para dispositivos electrónicos y aplicaciones de etiquetado biológico.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Nanotecnología La nanotecnología es la nanotecnología.
- Química Física es la química física.
Sus antecedentes:
- El autoensamblaje de nanocristales (NC) es crucial para la creación de nanomateriales ordenados.
- El control de la disposición de las NC dentro de las matrices permite propiedades de materiales sintonizables.
- Los NC solubles ofrecen potencial para aplicaciones avanzadas como el etiquetado biológico.
Objetivo del estudio:
- Para informar sobre la síntesis de una nueva nanocristal mesofase.
- Para investigar el autoensamblaje de micelas NC solubles en agua con sílice.
- Para explorar las propiedades y aplicaciones potenciales de la mesofasa NC/sílice resultante.
Principales métodos:
- Autoensamblaje de micelas NC de oro soluble en agua con sílice soluble.
- Control sobre el diámetro NC y las longitudes de la cadena de ligando/surfactante para el ajuste de la red.
- Recubrimiento de espín bajo polimerización de sílice controlada cinéticamente para la formación de mesofasa de película delgada.
- Fabricación de condensadores metálicos aislantes metálicos utilizando el conjunto NC / sílice.
Principales resultados:
- Se sintetizó una nueva mesofasa NC con NC de oro en una matriz de sílice cúbica centrada en la cara.
- Las dimensiones de las células de la mesofase son sintonizables a través del diámetro NC y la ingeniería de ligando / tensioactivo.
- Las mesofasas de película delgada NC/sílice ordenadas se formaron a través del recubrimiento de espín y el autoensamblaje impulsado por evaporación.
- Comportamiento de bloqueo colectivo de Coulomb demostrado en un dispositivo de condensador por debajo de 100 K.
Conclusiones:
- El estudio sintetizó con éxito una mesofase NC sintonizable con potencial para aplicaciones electrónicas.
- El proceso de autoensamblaje produce matrices NC/sílice ordenadas adecuadas para la fabricación de dispositivos.
- Las micelas NC intermedias solubles en agua son prometedoras para aplicaciones de etiquetado biológico.
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