Amorphization of Cu nanoparticles: Effects on surface plasmon resonance | Zendy

H. Amekura | Zendy; Bernt Johannessen | Zendy; David Sprouster | Zendy; M. C. Ridgway | Zendy

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Amorphization of Cu nanoparticles: Effects on surface plasmon resonance

Author(s) -

H. Amekura,

Bernt Johannessen,

David Sprouster,

M. C. Ridgway

Publication year - 2011

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3615307

Subject(s) - amorphous solid , surface plasmon resonance , nanoparticle , materials science , copper , irradiation , ion , absorption (acoustics) , plasmon , absorption spectroscopy , mean free path , surface plasmon , analytical chemistry (journal) , electron , crystallography , chemistry , nanotechnology , optoelectronics , optics , physics , organic chemistry , quantum mechanics , chromatography , nuclear physics , metallurgy , composite material

Crystalline copper nanoparticles (NPs) were formed in silica by multi-energy MeV ion implantations and then transformed to amorphous NPs by irradiation with 5 MeV Sn3+ ions. Optical absorption spectra of both the phases were evaluated in the ultra-violet to near-infrared regions. Compared with corresponding crystalline NPs of the same mean diameter, the amorphous NPs showed a low-energy shift of the surface plasmon resonance around 2.2 eV and less prominent absorption structure around 4 eV. These differences are explained by a strongly reduced electron mean-free-path in the amorphous NPs due to the loss of lattice periodicity.

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