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Autoensamblaje impulsado por cristalización inducida por luz viva para la preparación rápida de nanofibras
Suyong Shin1, Florian Menk2, Youngjin Kim3
1Department of Chemistry , Seoul National University , Seoul , 08826 , Korea.
Journal of the American Chemical Society
|May 2, 2018
Resumen
Los investigadores desarrollaron nanofibras de polímero conjugadas fluorescentes utilizando autoensamblaje inducido por la luz. Este método ofrece un control preciso sobre el tamaño y la uniformidad de la nanoestructura, lo que permite nuevas aplicaciones en dispositivos electrónicos y ópticos.
Área de la Ciencia:
- Ciencias de los materiales
- Química de los polímeros
- Nanotecnología
Sus antecedentes:
- Las nanoestructuras de polímeros conjugados exhiben propiedades electrónicas y ópticas únicas.
- El control preciso del tamaño y la uniformidad de estas nanoestructuras sigue siendo un desafío importante.
- Las estrategias de autoensamblaje existentes tienen limitaciones para lograr dispersiones estrechas.
Objetivo del estudio:
- Para demostrar la preparación de copolímeros de bloques conjugados fluorescentes.
- Para lograr la formación rápida y controlada de nanofibras a través del autoensamblaje inducido por la cristalización por luz.
- Explorar el autoensamblaje vivo para crear varias nanoestructuras con dimensiones controladas.
Principales métodos:
- Polimerización de una sola vez de copolímeros de bloque conjugado.
- Autoensamblaje impulsado por la cristalización inducida por la luz utilizando la fotoisomerización cis-trans.
- Crecimiento de semillas para la formación controlada de nanofibras, cómicelas y cómicelas de gradiente.
Principales resultados:
- Formación rápida de nanofibras de polímeros conjugados fluorescentes en unos minutos.
- Logró un excelente control de longitud y una distribución de tamaño estrecho en nanofibras.
- Se ha demostrado el autoensamblaje vivo para la producción de comicellas de tribloqueo ABA y comicellas de gradiente.
- Control inducido por la luz sobre el crecimiento de las semillas, permitiendo la activación y desactivación repetidas.
Conclusiones:
- Desarrolló un nuevo método para sintetizar nanoestructuras de polímero conjugadas bien definidas.
- El autoensamblaje impulsado por la cristalización inducida por la luz ofrece un control preciso sobre la morfología y el tamaño de la nanoestructura.
- El autoensamblaje viviente controlado por la luz abre posibilidades para nanomateriales dinámicos y sensibles.
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