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Open Access Nano Express

Synthesis and Magnetic Characterization of Metal-filled Double-sided Porous Silicon Samples

K Rumpf1*, P Granitzer1 and P Poelt2

Author Affiliations

1 Institute of Physics, Karl Franzens University, Universitaetsplatz 5, 8010, Graz, Austria

2 Institute for Electron Microscopy, University of Technology, Steyrergasse 17, 8010, Graz, Austria

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Nanoscale Research Letters 2009, 5:379-382  doi:10.1007/s11671-009-9492-6

Published: 15 November 2009

Abstract

A magnetic semiconductor/metal nanocomposite with a nanostructured silicon wafer as base material and incorporated metallic nanostructures (Ni, Co, NiCo) is fabricated in two electrochemical steps. First, the silicon template is anodized in an HF-electrolyte to obtain a porous structure with oriented pores grown perpendicular to the surface. This etching procedure is carried out either in forming a sample with a single porous layer on one side or in producing a double-sided specimen with a porous layer on each side. Second, this matrix is used for deposition of transition metals as Ni, Co or an alloy of these. The achieved hybrid material with incorporated Ni- and Co-nanostructures within one sample is investigated magnetically. The obtained results are compared with the ones gained from samples containing a single metal.

Keywords:
Nanocomposite material; Ferromagnetic nanostructures; Paramagnetic behaviour