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

P. Evans; W. R. Hendren; R. Atkinson; G. A. Wurtz; W. Dickson; A. V. Zayats; R. J. Pollard

doi:10.1088/0957-4484/17/23/006

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

P. Evans, W. R. Hendren, R. Atkinson, G. A. Wurtz, W. Dickson, A. V. Zayats, R. J. Pollard

Physics

Queen's University Belfast

Research output: Contribution to journal › Article › peer-review

131 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 language	English
Article number	006
Pages (from-to)	5746-5753
Number of pages	8
Journal	NANOTECHNOLOGY
Volume	17
Issue number	23
DOIs	https://doi.org/10.1088/0957-4484/17/23/006
Publication status	Published - 14 Dec 2006

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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.",

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AU - Evans, P.

AU - Hendren, W. R.

AU - Atkinson, R.

AU - Wurtz, G. A.

AU - Dickson, W.

AU - Zayats, A. V.

AU - Pollard, R. J.

PY - 2006/12/14

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AB - 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.

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JO - NANOTECHNOLOGY

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

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