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5. Formation of hollow silver nanoparticles under irradiation with ultrashort laser pulses

Author

Comunidad de Madrid, Ministerio de Ciencia e Innovación (España), European Commission, Ministerio de Educación y Formación Profesional (España), Universidad Politécnica de Madrid, Fondo Nacional de Desarrollo Científico y Tecnológico (Chile), Universidad Autónoma de Madrid, Sánchez-Pérez, F., Borrell-Grueiro, O., Casasnovas-Melián, A., Ramos-Ramos, D.J., Guerrero-Martínez, A., Bañares, L., Prada, A., Valencia, F.J., Kohanoff, J., Crespillo, M.L., Olivares Villegas, José, Rivera, A., Peña-Rodríguez, O., Comunidad de Madrid, Ministerio de Ciencia e Innovación (España), European Commission, Ministerio de Educación y Formación Profesional (España), Universidad Politécnica de Madrid, Fondo Nacional de Desarrollo Científico y Tecnológico (Chile), Universidad Autónoma de Madrid, Sánchez-Pérez, F., Borrell-Grueiro, O., Casasnovas-Melián, A., Ramos-Ramos, D.J., Guerrero-Martínez, A., Bañares, L., Prada, A., Valencia, F.J., Kohanoff, J., Crespillo, M.L., Olivares Villegas, José, Rivera, A., and Peña-Rodríguez, O.

Abstract

We have studied the formation of cavities in spherical silver nanoparticles embedded in silica, irradiated with fs laser pulses that produce an intense electronic excitation. Experimentally determined aspect ratio, i.e. the ratio between the cavity and nanoparticle size, for hollow structures formed under different irradiation conditions shows a very good agreement with values obtained by means of atomistic simulations. According to the predictions of the atomistic model, one can produce at will hollow silver nanoparticles with cavities of tailored dimensions, having an accurate control. Hence, laser irradiation can be used to control and design the optical response by tuning the localized surface plasmon resonances of the hollow nanoparticles.

Published
2024

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