Amorphization of Cu nanoparticles: Effects on surface plasmon resonance

被引：13
|
作者：
Amekura, H. [1 ]
Johannessen, B. [2 ]
Sprouster, D. J. [3 ]
Ridgway, M. C. [3 ]
机构：
[1] Natl Inst Mat Sci NIMS, Tsukuba, Ibaraki 3050003, Japan
[2] Australian Synchrotron, Clayton, Vic 3168, Australia
[3] Australian Natl Univ, Canberra, ACT 0200, Australia
来源：
APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 04期
关键词：
OPTICAL-ABSORPTION;
D O I：
10.1063/1.3615307
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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. (C) 2011 American Institute of Physics. [doi:10.1063/1.3615307]
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页数：3
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