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Electrochemical deposition of Co nanowire arrays, Quantitative consideration of concentration profiles
Interconnect and Packaging, ACREO AB, Bredgatan 34, S-602 21 Norrköping, Sweden.
Unité Mixte de Recherche du Centre National de la Recherche Scientifique et de Thomson, Laboratoire Central de Recherches Thomson, F-91404 Orsay, France.
Interconnect and Packaging, ACREO AB, Bredgatan 34, S-602 21 Norrköping, Sweden.
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics.ORCID iD: 0000-0002-2837-3656
2001 (English)In: Electrochimica Acta, ISSN 0013-4686, Vol. 47, no 6, 865-874 p.Article in journal (Refereed) Published
Abstract [en]

Electrodeposition of Co into ion track etched polycarbonate membranes by a chronoamperometric method has been studied. The concentration variation and diffusion limiting current during nanoprocessing for growth of Co in nanoelectrode applications are described for two regimes, in the vicinity of the electrode and at the mouth of pores. The behaviour of the as-deposited nanoelectrodes can be modelled as a recessed microelectrode. A diffusion controlled limiting current of the nanodes is studied by the Cottrell equation at short times, i.e. current at-1/2. At longer times, a steady-state current is obtained due to gradually increasing radii, r, of the spherical diffusion zones from each recessed nanode, i.e. current a(1/(r+L)), where L is the membrane thickness. The experimental value of diffusion coefficient D for Co ions was found: D = 2.5 × 10-5 cm2 s-1. XRD and TEM measurements on 250 nm diameter and 20 µm long Co nanowires showed a hexagonal closed packed phase with a <100> texturing. The nanowires exhibited an enhanced magnetic coercivity in comparison to bulk Co. The difference of saturation fields between the parallel and perpendicular orientation fields corresponds well to the expected demagnetisation field of 2pM = 8796 Oe value due to the shape anisotropy in case of an infinite thin Co cylinder. © 2001 Elsevier Science Ltd. All rights reserved.

Place, publisher, year, edition, pages
2001. Vol. 47, no 6, 865-874 p.
Keyword [en]
Magnetic properties, Nanodes, Nanostructures, Spherical diffusion
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-47158DOI: 10.1016/S0013-4686(01)00797-6OAI: diva2:268054
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2016-08-31

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ReferencesLink to record
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