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Amorphization of Cu nanoparticles: effects on surface plasmon resonance

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Date

2011-07-25

Authors

Amekura, H
Johannessen, B
Sprouster, D. J
Ridgway, M. C

Journal Title

Journal ISSN

Volume Title

Publisher

American Institute of Physics

Abstract

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 absorptionspectra 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 absorptionstructure 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.

Description

Keywords

Keywords: Absorption structure; Copper nanoparticles; Cu nanoparticles; Electron mean-free path; Lattice periodicity; Low energies; Mean diameter; Near infrared region; Ultra-violet; Absorption; Crystalline materials; Electron energy loss spectroscopy; Ion implanta

Citation

URI

http://hdl.handle.net/1885/15539

Collections

ANU Research Publications

Source

Applied Physics Letters

Type

Journal article

Book Title

Entity type

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DOI

10.1063/1.3615307

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