Amorphization of Cu nanoparticles: effects on surface plasmon resonance
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
Collections
Source
Applied Physics Letters
Type
Journal article
Book Title
Entity type
Access Statement
License Rights
Restricted until
Downloads
File
Description
Published Version