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Open Access Nano Express

Magnetic properties of superparamagnetic nanoparticles loaded into silicon nanotubes

Petra Granitzer1*, Klemens Rumpf1, Roberto Gonzalez2, Jeffery Coffer2 and Michael Reissner3

Author Affiliations

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

2 Department of Chemistry, Texas Christian University, Fort Worth, TX 76129, USA

3 Institute of Solid State Physics, Vienna University of Technology, Wiedner Hauptstr. 8Vienna 1040, Austria

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Nanoscale Research Letters 2014, 9:413  doi:10.1186/1556-276X-9-413

Published: 21 August 2014

Abstract

In this work, the magnetic properties of silicon nanotubes (SiNTs) filled with Fe3O4 nanoparticles (NPs) are investigated. SiNTs with different wall thicknesses of 10 and 70 nm and an inner diameter of approximately 50 nm are prepared and filled with superparamagnetic iron oxide nanoparticles of 4 and 10 nm in diameter. The infiltration process of the NPs into the tubes and dependence on the wall-thickness is described. Furthermore, data from magnetization measurements of the nanocomposite systems are analyzed in terms of iron oxide nanoparticle size dependence. Such biocompatible nanocomposites have potential merit in the field of magnetically guided drug delivery vehicles.

PACS

61.46.Fg; 62.23.Pq; 75.75.-c; 75.20.-g

Keywords:
Silicon nanotubes; Magnetic nanoparticles; Superparamagnetism; Iron oxide; Drug delivery