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Síntesis controlada por quiralidad de nanocables Au de doble hélice
Makoto Nakagawa1, Takeshi Kawai1
1Department of Industrial Chemistry , Tokyo University of Science , 1-3 Kagurazaka, Shinjuku-ku , Tokyo 162-8601 , Japan.
Journal of the American Chemical Society
|April 4, 2018
Resumen
Los investigadores desarrollaron un método para crear nanocables de oro quirales y de doble hélice (Au NW) utilizando plantillas de organogelador. Este avance permite el control de la estructura helicoidal y las propiedades ópticas de estos nanomateriales complejos.
Área de la Ciencia:
- * La nanotecnología
- * Ciencias de los materiales
- * Quiralidad
Sus antecedentes:
- * La síntesis de nanocristales de metales nobles complejos con formas controladas es un desafío significativo.
- * Los métodos químicos húmedos son cruciales para la producción de nanocristales a gran escala.
- * La quiralidad en los nanomateriales es esencial para aplicaciones ópticas y electrónicas avanzadas.
Objetivo del estudio:
- * Para lograr una síntesis controlada por quiralidad de nanocables de oro de doble hélice (Au NW).
- * Utilizar plantillas quirales para un control preciso de la morfología Au NW.
- * Explorar la relación entre la quiralidad de la plantilla y la estructura y las propiedades ópticas de Au NW resultantes.
Principales métodos:
- * Preparación de plantillas unidimensionales de nanocintas retorcidas utilizando dos organogelantes funcionales en una mezcla acuosa y orgánica.
- * Introducción de la helicidad en la plantilla a través de un organogelador específico.
- * Control de la forma y el crecimiento de Au NW a lo largo de los bordes de la plantilla utilizando un agente de tapa.
- * Síntesis de Au NW en plantillas quirales para replicar la helicidad de la plantilla.
Principales resultados:
- * Síntesis exitosa de Au NW de doble hélice con quiralidad derecha o izquierda controlada.
- * Los NW Au adoptaron la estructura helicoidal de la plantilla blanda quiral subyacente.
- * Las dispersiones de Au NW enantioméricos mostraron señales de dicroísmo circular (CD) distintas, lo que confirma su quiralidad.
Conclusiones:
- * Las plantillas blandas quirales compuestas por organogeladores proporcionan una estrategia eficaz para sintetizar nanoestructuras de metales nobles complejas y helicoidales.
- * El método desarrollado permite un control preciso de la quiralidad de las torres nucleares Au de doble hélice.
- * Los Au NW quirales sintetizados muestran potencial para aplicaciones en dispositivos quirópticos debido a sus señales CD opuestas.
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