Journal
APPLIED SURFACE SCIENCE
Volume 254, Issue 13, Pages 3845-3848Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2007.12.006
Keywords
Ag/Cu nanowires; surface plasma resonance; redshift; electrodeposition
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Arrays of Ag/Cu alloy nanowires embedded in anodic alumina membranes (AAMs) were synthesized by directly electrodepositing from a mixing electrolyte solution containing Ag+ and Cu2+ ions. Manipulations of optical properties of the resulting samples were successfully achieved by tuning the molar ratio of Ag+ and Cu2+ ions in the starting materials. When the ratio is less than 2:20, two surface plasma resonance (SPR) peaks corresponding to Ag and Cu appear, respectively. After annealing treatment, the SPR peak corresponding to Cu disappears, and that of Ag presents a red shift. Furthermore, this red shift can be up to 85 nm when the molar ratio of Ag+ and Cu2+ reduce to 1: 20, which is attributed to the transferable electrons from Cu atoms. (C) 2007 Elsevier B.V. All rights reserved.
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