期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 120, 期 23, 页码 12810-12818出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.6b01465
关键词
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资金
- European Research Council through the Advanced Grant MolNanoMas [267746]
- Italian MIUR through FIRB project NanoPlasMag [RBFR10OAI0]
- Fondazione Cariplo through project Chemical synthesis and characterization of magneto-plasmonic nano-heterostructures [2010-0612]
In this work we report a technique for the preparation of AuxNii-x alloy nanoparticles based on pulsed laser irradiation in liquid of Au and Ni@NiO colloidal mixtures. The structural and compositional characterization of the obtained materials, 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 to Ni@NiO ratio in the irradiated mixture. With the support of theoretical calculations, we propose as possible mechanism for the formation of the alloy structures a temperature increase, enhanced by the strong absorption of gold surface plasmon resonance at resonant wavelength, and a subsequent melting of the structures. Optical characterization through UV-vis spectroscopy and magnetic characterization through SQUID magnetometry confirm a coexistence of the plasmonic and magnetic behaviors in the hybrid systems. In view of such results, AuxNi1-x alloy nanoparticles could be a promising base material for devices requiring both plasmonic and magnetic properties.
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