Mixed Composition Nanowires Prepared By Electrodeposition

Beata Kalska-Szostko 1Ewa Brancewicz Krzysztof Szymański Wojciech Olszewski 2Piotr Mazalski 

1. University of Białystok, Institute of Chemistry, Hurtowa 1, Białystok 15-399, Poland
2. University of Białystok, Institute of Experimental Physics, Lipowa 41, Białystok 15-424, Poland

Abstract

In last two decades the intensive growth of research in area of nano scale materials takes place. Among many procedures by which the nanomaterials can be obtained electrochemistry is the cheapest and easiest one. This method has no limitation for sample shape and size. Besides that almost any material can be electrochemically deposited.

In our work the preparation of magnetic nanowires with mixed composition in porous matrix will be presented. The obtained structures can have different diameter which is tunable by template material. Length and the inert structure of the wires depends mainly on time of the deposition and electrolyte composition, respectively. The morphology of the prepared wires depends also on deposition mode (alternating current or constant current).

The smallest wires of the diameter 40 nm were prepared in porous anodic alumina oxide anodized in oxalic acid. The largest pores of around 120 nm were produced in phosphorous acid. The length of this nanowires can be as large as the thickness of oxide layer and reach up to 1 μm. The morphology of wires were studied by atomic force microscopy (AFM) and electron scanning microscopy (SEM). The magnetic characterization was done with usage of magnetic force microscopy (MFM) and Mössbauer spectroscopy. The wires show different deposition rate in matrices prepared in oxalic and phosphorous acid. The deposition rate depends also on the elements. The wires show magnetization along their growth direction.

Work is supported by Polish National Grant No N N204 246435

 

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Presentation: Oral at E-MRS Fall Meeting 2009, Symposium F, by Beata Kalska-Szostko
See On-line Journal of E-MRS Fall Meeting 2009

Submitted: 2009-05-28 12:43
Revised:   2009-06-07 00:48