NUKLEONIKA 2007, 52(Supplement 1):S33-S36

MÖSSBAUER STUDY OF MAGNETITE NANOWIRE IN MCM-41 TYPE MESOPOROUS SILICA TEMPLETES

Zbigniew Surowiec1, Jacek Goworek2, Janusz Ryczkowski2, Mieczysław Budzyński1, Marek Wiertel1, Jan Sarzyński1

1 Institute of Physics, M. Curie-Skłodowska University, 1 M. Curie-Skłodowska Sq., 20-031 Lublin, Poland
2 Faculty of Chemistry, M. Curie-Skłodowska University, 2 M. Curie-Skłodowska Sq., 20-031 Lublin, Poland

Arrays of Fe3O4 nanowires embedded in mesoporous ordered silica were obtained in two ways: dissolving Fe3+ ions in an aqueous medium and their adsorption on internal and external surfaces, with the use of a Fe-EDTA complex. Magnetite polycrystalline nanowires were characterized by means of X-ray diffraction and 57Fe Mössbauer spectroscopy (MS). The average length of these nanowires is about 70 nm and their diameter is about 3 nm. Mössbauer studies evidenced that the composites consist of very small Fe3O4 particles. Almost 80% of particles exist in a paramagnetic state.