We report the formation of AuxNi1-x alloy nanoparticles obtained by pulsed laser irradiation of Au and Ni@NiO colloidal mixtures. Structural characterization performed through X-Ray Diffraction and Transmission Electron Microscopy coupled with Energy Dispersive X-Ray Spectroscopy has shown a correlation between the final alloy composition and the different Au/Ni@NiO ratio in the irradiated mixture.Supported by theoretical calculations, we propose as possible mechanism for the formation of the alloy structures a temperature increasing and a subsequent melting of the structures, driven by the excitation of gold surface plasmon resonances. Optical and magnetic characterization confirms a coexistence of the plasmonic and magnetic behaviors in the hybrid systems.
Tuning the Composition of Alloy Nanoparticles Through Laser Mixing: The Role of Surface Plasmon Resonance
Giovanni Calogero, Li Destri Nicosia;Giovanni, Marletta;Marcello, Condorelli;Giuseppe Romano, Compagnini
2016-01-01
Abstract
We report the formation of AuxNi1-x alloy nanoparticles obtained by pulsed laser irradiation of Au and Ni@NiO colloidal mixtures. Structural characterization performed through X-Ray Diffraction and Transmission Electron Microscopy coupled with Energy Dispersive X-Ray Spectroscopy has shown a correlation between the final alloy composition and the different Au/Ni@NiO ratio in the irradiated mixture.Supported by theoretical calculations, we propose as possible mechanism for the formation of the alloy structures a temperature increasing and a subsequent melting of the structures, driven by the excitation of gold surface plasmon resonances. Optical and magnetic characterization confirms a coexistence of the plasmonic and magnetic behaviors in the hybrid systems.File | Dimensione | Formato | |
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