Fabrication and characteristics of ordered Ni nanostructures on glass by anodization and direct current electrodeposition

Song Zhu Chu, Kenji Wada, Satoru Inoue, Sin ichi Todoroki, Yukiko K. Takahashi, Kazuhiro Hono

Research output: Contribution to journalArticlepeer-review

119 Citations (Scopus)

Abstract

A novel process for fabrication of metal nanostructure arrays directly on glass substrates is described. An aluminum film was sputter-deposited on a glass substrate coated with a tin-doped indium oxide (ITO) film. The films were then anodically oxidized to obtain a porous alumina template, with pore diameters ranging from 5 to 150 nm, which was used as a template-electrode in a direct current electrodeposition to fabricate various nickel nanowires (Ø 18-180 nm, 0.5-2.6 μm long) in the nanopores. The porous alumina films not only define the dimensions of the nanowires but also influence the crystalline orientation. The magnetic hysteresis measurement showed that the Ni nanowire arrays have significant magnetic anisotropy proportional to their aspect ratios. The coercivity (Hc) and the squareness (Mr/Ms) perpendicular to the substrates were 1025 Oe and 0.74 for the Ni nanowires of Ø 50 nm (1.8 μm), and 830 Oe and 0.94 for the Ni nanowires of Ø 18 nm (1.2 μm), respectively.

Original languageEnglish
Pages (from-to)4595-4602
Number of pages8
JournalChemistry of Materials
Volume14
Issue number11
DOIs
Publication statusPublished - 2002 Nov 1
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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