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Exploiting finite size effects in a novel core/shell microstructure

J. Appl. Phys. 103, 064313 (2008); doi:10.1063/1.2844286

Published 24 March 2008

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Zhu Liu,1 Guoqiang Xia,2 Frank Zhu,2 Su Kim,1 Nina Markovic,2 Chia-Ling Chien,1,2 and Peter C. Searson1,2
1Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA
2Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA
Electrodeposition of Ni–Cu alloys at high Cu(II) concentration and large overpotentials results in phase separation with a unique microstructure characterized by features with a copper-rich core and a nickel-rich shell. By confining deposition to nanoporous channels with dimensions comparable to or smaller than the grain size results in the formation of solid Ni–Cu nanowires with a copper-rich core and a nickel-rich shell. Etching of the copper-rich core results in the formation of Ni-rich nanotubes. The magnetic properties of the Ni–Cu nanowires and the Ni nanotubes are investigated. ©2008 American Institute of Physics
History: Received 11 May 2007; accepted 15 December 2007; published 24 March 2008
Permalink: http://link.aip.org/link/?JAPIAU/103/064313/1
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KEYWORDS and PACS

Keywords
PACS
  • 68.65.La
    Quantum wires patterned in quantum wells (structure and nonelectronic properties)
  • 61.46.Fg
    Structure of nanotubes
  • 81.07.Vb
    Quantum wires: fabrication and characterization
  • 81.16.Be
    Chemical synthesis methods in nanofabrication and processing
  • 64.75.Jk
    Phase separation and segregation in nanoscale systems
  • YEAR: 2008

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ISSN:
0021-8979 (print)   1089-7550 (online)
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