Electrodeposition of Cu nanowire arrays with a template

Y. Konishi, M. Motoyama, H. Matsushima, Y. Fukunaka, R. Ishii, Y. Ito

Research output: Contribution to journalConference articlepeer-review

80 Citations (Scopus)

Abstract

Cu nanowire arrays were electrodeposited with a template of a polycarbonate (PC) filter. Pt-Pd alloy film was sputtered on one side of the PC filter and then used as cathode in 0.6 M CuSO4 aqueous solution (pH 2). Potentiostatic electrodeposition at -400 mV vs. Cu reference electrode was conducted in two kinds of electrolytic cell configurations, cathode over anode (C/A) and anode over cathode (A/C). The transient variation of the cathodic current clearly showed four stages in both cell configurations; (I) nucleation and crystal growth mode of Cu on the Pt-Pd film, (II) filling up with electrodeposited Cu in the nanosized pores, (III) covering of the surface of the template with Cu, and (IV) growth of a Cu thick film. In Stage II, the cathodic current increased in the A/C configuration, while it decreased in the C/A. The duration time of Stage II was shorter in the A/C configuration than that in the C/A. The difference of the cathodic current variation between the two configurations was smaller with smaller sized pores. These phenomena suggest that the ionic mass transfer rate of Cu2+ ion accompanied by electrodeposition is enhanced by a kind of natural convection even in and around such a nanosized pore and that the pores are filled up faster with electrodeposited Cu in the A/C than in the C/A configuration.

Original languageEnglish
Pages (from-to)149-153
Number of pages5
JournalJournal of Electroanalytical Chemistry
Volume559
DOIs
Publication statusPublished - Nov 15 2003
Externally publishedYes
EventInternational Symposium on Materials Processing for Nonstruct (MPND2001) - Kyoto, Japan
Duration: Sep 16 2001Sep 19 2001

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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