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Electrodeposition and magnetic properties of three-dimensional bulk and shell nickel mesostructures

Electrodeposition and magnetic properties of three-dimensional bulk and shell nickel mesostructures
Electrodeposition and magnetic properties of three-dimensional bulk and shell nickel mesostructures
In this paper we demonstrate the electrodeposition of nickel, a common ferromagnetic material, in various magnetically desirable shapes including nanowires, nanoparticles and highly faceted shells. In order to obtain three dimensional mesostructures, the electrochemical deposition of nickel was performed on highly oriented pyrolytic graphite (HOPG) under different electrolyte composition and deposition potential conditions. Under potentiostatic deposition at one distinct potential negative with respect to the reversible potential of nickel, three stages of nucleation and growth take place leading to a complex morphology of deposits. However, dual-pulse potential deposition and electrodeposition in low pH solutions causing hydrogen evolution, lead to nickel deposits in the form of nanowires and nanoparticles with the complete absence of a faceted morphology. Highly faceted nickel shells were electrodeposited via a dual-bath method on prefabricated silver mesocrystals as 'template' electrodeposited on HOPG. Magnetic properties of faceted three dimensional nickel shells reveal clear signatures of facets of mesocrystals in the form of sharp steps in measured hysteresis loops and a strong magnetic anisotropy with respect to applied field direction.
0040-6090
8320-8325
Nasirpouri, F.
ba34ed11-f7bf-44b9-82d6-df2d6ebd9711
Bending, S.J.
6fc9500c-53af-4abc-9a27-b0c4e4f87712
Peter, L.M.
a699c8d3-512e-43c4-ad64-7cb5d0694a87
Fangohr, H.
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
Nasirpouri, F.
ba34ed11-f7bf-44b9-82d6-df2d6ebd9711
Bending, S.J.
6fc9500c-53af-4abc-9a27-b0c4e4f87712
Peter, L.M.
a699c8d3-512e-43c4-ad64-7cb5d0694a87
Fangohr, H.
9b7cfab9-d5dc-45dc-947c-2eba5c81a160

Nasirpouri, F., Bending, S.J., Peter, L.M. and Fangohr, H. (2011) Electrodeposition and magnetic properties of three-dimensional bulk and shell nickel mesostructures. Thin Solid Films, 519 (23), 8320-8325. (doi:10.1016/j.tsf.2011.03.058).

Record type: Article

Abstract

In this paper we demonstrate the electrodeposition of nickel, a common ferromagnetic material, in various magnetically desirable shapes including nanowires, nanoparticles and highly faceted shells. In order to obtain three dimensional mesostructures, the electrochemical deposition of nickel was performed on highly oriented pyrolytic graphite (HOPG) under different electrolyte composition and deposition potential conditions. Under potentiostatic deposition at one distinct potential negative with respect to the reversible potential of nickel, three stages of nucleation and growth take place leading to a complex morphology of deposits. However, dual-pulse potential deposition and electrodeposition in low pH solutions causing hydrogen evolution, lead to nickel deposits in the form of nanowires and nanoparticles with the complete absence of a faceted morphology. Highly faceted nickel shells were electrodeposited via a dual-bath method on prefabricated silver mesocrystals as 'template' electrodeposited on HOPG. Magnetic properties of faceted three dimensional nickel shells reveal clear signatures of facets of mesocrystals in the form of sharp steps in measured hysteresis loops and a strong magnetic anisotropy with respect to applied field direction.

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Published date: 1 April 2011
Organisations: Computational Engineering & Design Group

Identifiers

Local EPrints ID: 203415
URI: http://eprints.soton.ac.uk/id/eprint/203415
ISSN: 0040-6090
PURE UUID: 476c6c15-4349-44d3-a958-25e59a441d68
ORCID for H. Fangohr: ORCID iD orcid.org/0000-0001-5494-7193

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Date deposited: 16 Nov 2011 15:24
Last modified: 15 Mar 2024 03:03

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Contributors

Author: F. Nasirpouri
Author: S.J. Bending
Author: L.M. Peter
Author: H. Fangohr ORCID iD

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