Growth and properties of gold and nickel nanorods in thin film alumina

Paul Evans, William Hendren, Ron Atkinson, Gregory Wurtz, Wayne Dickson, Anatoly Zayats, Robert Pollard

Research output: Contribution to journalArticle

115 Citations (Scopus)

Abstract

Arrays of nickel and gold nanorods have been grown on glass and silicon substrates using porous alumina templates of less than 500 nm thickness. A method is demonstrated for varying the diameter of the nanorods whilst keeping the spacing constant. Optical extinction spectra for the gold nanorods show two distinct maxima associated with the transverse and longitudinal axes of the rods. Adding small quantities of oxygen to the aluminium before anodization is found to improve the sharpness of the extinction peaks. The spectral position of the longitudinal peak is shown to be sensitive to the nanorod diameter for constant length and spacing. For the nickel nanorods it is shown that the magnetic properties are governed by both interactions between the wires and shape anisotropy.
Original languageEnglish
Article number006
Pages (from-to)5746-5753
Number of pages8
JournalNanotechnology
Volume17(23)
Issue number23
DOIs
Publication statusPublished - 14 Dec 2006

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

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