Femtosecond laser reshaping yields gold nanorods with ultranarrow surface plasmon resonances
Por:
González-Rubio G., Díaz-Núñez P., Rivera A., Prada A., Tardajos G., González-Izquierdo J., Bañares L., Llombart P., Macdowell L.G., Palafox M.A., Liz-Marzán L.M., Peña-Rodríguez O., Guerrero-Martínez A.
Publicada:
1 ene 2017
Resumen:
The irradiation of gold nanorod colloids with a femtosecond laser can be tuned to induce controlled nanorod reshaping, yielding colloids with exceptionally narrow localized surface plasmon resonance bands. The process relies on a regime characterized by a gentle multishot reduction of the aspect ratio, whereas the rod shape and volume are barely affected. Successful reshaping can only occur within a narrow window of the heat dissipation rate: Low cooling rates lead to drastic morphological changes, and fast cooling has nearly no effect. Hence, a delicate balance must be achieved between irradiation fluence and surface density of the surfactant on the nanorods. This perfection process is appealing because it provides a simple, fast, reproducible, and scalable route toward gold nanorods with an optical response of exceptional quality, near the theoretical limit. © 2017, American Association for the Advancement of Science. All rights reserved.
Filiaciones:
González-Rubio G.:
Departamento de Química Física I, Universidad Complutense de Madrid, Avenida Complutense s/n, Madrid, Spain
Bionanoplasmonics Laboratory, CIC biomaGUNE, Paseo de Miramón 182, Donostia–San Sebastián, Spain
Díaz-Núñez P.:
Instituto de Fusión Nuclear, Universidad Politécnica de Madrid, José Gutiérrez Abascal 2, Madrid, Spain
Rivera A.:
Instituto de Fusión Nuclear, Universidad Politécnica de Madrid, José Gutiérrez Abascal 2, Madrid, Spain
Prada A.:
Instituto de Fusión Nuclear, Universidad Politécnica de Madrid, José Gutiérrez Abascal 2, Madrid, Spain
Tardajos G.:
Departamento de Química Física I, Universidad Complutense de Madrid, Avenida Complutense s/n, Madrid, Spain
González-Izquierdo J.:
Centro de Láseres Ultrarápidos, Universidad Complutense de Madrid, Avenida Complutense s/n, Madrid, Spain
Bañares L.:
Departamento de Química Física I, Universidad Complutense de Madrid, Avenida Complutense s/n, Madrid, Spain
Centro de Láseres Ultrarápidos, Universidad Complutense de Madrid, Avenida Complutense s/n, Madrid, Spain
Llombart P.:
Departamento de Química Física I, Universidad Complutense de Madrid, Avenida Complutense s/n, Madrid, Spain
Macdowell L.G.:
Departamento de Química Física I, Universidad Complutense de Madrid, Avenida Complutense s/n, Madrid, Spain
Palafox M.A.:
Departamento de Química Física I, Universidad Complutense de Madrid, Avenida Complutense s/n, Madrid, Spain
Liz-Marzán L.M.:
Ciber-BBN (Ciber de Bioingeniería, Biomateriales y Nanomedicina), Donostia–San Sebastián, Spain
Ikerbasque (Basque Foundation for Science), Bilbao, Spain
Peña-Rodríguez O.:
Instituto de Fusión Nuclear, Universidad Politécnica de Madrid, José Gutiérrez Abascal 2, Madrid, Spain
Guerrero-Martínez A.:
Departamento de Química Física I, Universidad Complutense de Madrid, Avenida Complutense s/n, Madrid, Spain
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