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Formation and control of nanoporous Ag through electrochemical dealloying of the melt-spun Cu-Ag-Ce alloys

Published online by Cambridge University Press:  10 May 2012

Guijing Li ,
Xiaoping Song ,
Feifei Lu ,
Zhanbo Sun ,
Zhimao Yang ,
Shengchun Yang  and
Bingjun Ding
Guijing Li
Affiliation:
Department of Materials Physics & Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, Shaanxi, P. R. China; MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, P. R. China
Xiaoping Song
Affiliation:
Department of Materials Physics & Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, Shaanxi, P. R. China; MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, P. R. China
Feifei Lu
Affiliation:
Department of Materials Physics & Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, Shaanxi, P. R. China; MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, P. R. China
Zhanbo Sun*
Affiliation:
Department of Materials Physics & Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, Shaanxi, P. R. China; MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, P. R. China
Zhimao Yang
Affiliation:
Department of Materials Physics & Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, Shaanxi, P. R. China; MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, P. R. China
Shengchun Yang
Affiliation:
Department of Materials Physics & Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, Shaanxi, P. R. China; MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, P. R. China
Bingjun Ding
Affiliation:
Department of Materials Physics & Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, Shaanxi, P. R. China; MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, P. R. China
*
a)Address all correspondence to this author. e-mail: szb@mail.xjtu.edu.cn
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Abstract

In this work, the ultrafine nanoporous Ag ribbons were achieved through addition of 2 at.%–6 at.% Ce into the melt-spun Cu-Ag alloys and applying different electrochemical dealloying potentials. The dendritic morphology of the ligaments in the dealloyed Cu80Ag20 alloy varied to be equiaxial due to the addition of Ce, and the pore size reduced from 200 nm to less than 60 nm. The nanoporous Ag with an average pore size of ∼15 nm was obtained from the Cu74Ag20Ce6 alloy. The pore and ligament sizes of the nanoporous Ag prepared from the Cu76Ag20Ce4 alloy exhibited an increasing tendency with the increase of applied potentials, while the dealloyed Cu78Ag20Ce2 had an opposite variation. Moreover, the addition of Ce into the Cu-Ag alloys also promoted the dealloying. Nanoporous Ag exhibited the stronger enhancement of the surface enhanced Raman scattering effects with the increase of Ce contents in the precursory alloys.

Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 12 , 28 June 2012 , pp. 1612 - 1620
Copyright
Copyright © Materials Research Society 2012

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