Producing shape-controlled metal nanowires and nanotubes by an electrochemical method

Y. Fukunaka, M. Motoyama, Y. Konishi, R. Ishii

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)

Abstract

Nanowire and nanotube arrays of transition metal were produced by potentiostatic electrochemical deposition using a polycarbonate membrane filter template (15 to 200 nm in nanopore diameter). Nanotubes are produced by appropriately controlled partial filling of the pore cross section; nanowires result when the filter pore is completely filled. In this manner, nanotubes and nanowires of transition metals (Ni, Co, and Fe) were produced as well as Cu nanowire. The nanowires have an aspect ratio ranging from 50 to 400 dependent on the transient variation of cathodic current. The metal deposition rate must be balanced with that of hydrogen generation (dissolved or evolved as bubbles). The wall thickness of nanotubes, varying from 10 to 70 nm, may be controlled conveniently by adjusting the pH of the solution and the applied electrode potential. Suppression of hydrogen bubble evolution in the nanocapillary structure clearly plays an important role.

Original languageEnglish
Pages (from-to)C62-C64
JournalElectrochemical and Solid-State Letters
Volume9
Issue number3
DOIs
Publication statusPublished - 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Chemical Engineering
  • General Materials Science
  • Physical and Theoretical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

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