title: Magnetic properties of superparamagnetic nanoparticles loaded into silicon nanotubes.
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.
  61.46.Fg; 62.23.Pq; 75.75.-c; 75.20.-g.
authors.affiliation: Institute of Physics, Karl Franzens University Graz, Universitaetsplatz 5, Graz 8010, Austria.
authors.forename: Petra
authors.initials: P
authors.lastname: Granitzer
authors.affiliation: Institute of Physics, Karl Franzens University Graz, Universitaetsplatz 5, Graz 8010, Austria.
authors.forename: Klemens
authors.initials: K
authors.lastname: Rumpf
authors.affiliation: Department of Chemistry, Texas Christian University, Fort Worth, TX 76129, USA.
authors.forename: Roberto
authors.initials: R
authors.lastname: Gonzalez
authors.affiliation: Department of Chemistry, Texas Christian University, Fort Worth, TX 76129, USA.
authors.forename: Jeffery
authors.initials: J
authors.lastname: Coffer
authors.affiliation: Institute of Solid State Physics, Vienna University of Technology, Wiedner Hauptstr. 8Vienna 1040, Austria.
authors.forename: Michael
authors.initials: M
authors.lastname: Reissner
keywords: Drug delivery; Iron oxide; Magnetic nanoparticles; Silicon nanotubes; Superparamagnetism