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Intercambio quiróptico dependiente de la morfología en nanorodos de oro intrínsecamente quirales encapsulados con

Shengyan Wang¹, Yilin Chen¹, Zhongyi Chen^1,2

¹Guangdong Basic Research Center of Excellence for Aggregate Science, School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, China.

|August 26, 2025

Resumen

Los investigadores demuestran el control de la polarización de la luz utilizando nanorodos quirales de oro recubiertos con polianilina. El dopaje de protones de polianilina permite la conmutación quiróptica, ofreciendo el potencial para dispositivos ópticos a nanoescala.

Área de la Ciencia:

Las plasmónicas
Nanotecnología
Ciencias de los materiales

Sus antecedentes:

Las nanopartículas plasmónicas intrínsecamente quirales son la clave para manipular la polarización de la luz.
Los polímeros conjugados como la polianilina ofrecen propiedades ópticas ajustables y capacidad de respuesta.

Objetivo del estudio:

Explorar estrategias de conmutación para nanopartículas quirales plasmónicas utilizando polianilina.
Para investigar el comportamiento de conmutación quiróptica de nanorods quirales de oro recubiertos de polianilina.

Principales métodos:

Dopaje de protones de polianilina (PANI) para controlar el cambio quiróptico.
Encapsulación de nanorodos quirales de oro (cAuNR) con PANI.
Análisis de los espectros de desplazamiento espectral y dicroísmo circular.

Principales resultados:

Se ha demostrado la activación quiróptica de los cAuNR encapsulados con PANI mediante dopaje de protones.
Se observó un desplazamiento espectral anormal debido a la morfología de la PANI en las nano brechas.
Descubrió que la absorción del infrarrojo cercano por el PANI dopado reduce la intensidad de la respuesta quiróptica y causa división espectral.

Conclusiones:

Conocimiento de la interacción entre polímeros conjugados y nanopartículas quirales plasmónicas.
Aplicaciones potenciales en el desarrollo de interruptores quirópticos a nanoescala para dispositivos en chip.

Palabras clave:

plasmónicos quirales Dicroísmo circular nanorodos de oro Polinila y sus derivados el cambio

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