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Magnetite nanowires in MCM-41 type mesoporous silica templates |
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| Authors: | Zbigniew Surowiec Marek Wiertel Mieczysław Budzyński Jan Sarzyński Jacek Goworek |
| Institution: | 1. Institute of Physics, M. Curie-Sklodowska University, 1 M. Curie-Sklodowska Sq, 20-031 Lublin, Poland;2. Faculty of Chemistry, M. Curie-Sklodowska University, 2 M. Curie-Sklodowska Sq, 20-031 Lublin, Poland;1. Gdansk University of Technology, Gdansk, Poland;2. Institute of Molecular Physics, Polish Academy of Sciences, Poznan, Poland;3. University of Athens, Athens,Greece |
| Abstract: | MCM-41 mesoporous material was chosen as a template of very small Fe3O4 particles. The results of structural and magnetic studies of magnetite nanowires are reported. The average length of these nanowires is about 70 nm and their diameter is 3 nm. Magnetite polycrystalline nanowires were characterized by means of X-ray diffraction and 57Fe Mössbauer spectroscopy (MS). Almost 80% of the particles exist in a superparamagnetic state at room temperature. Mössbauer measurements also provided evidence that the composites displayed a distribution of magnetic particles by size. As a result, strong changes of superparamagnetic and magnetic relative contributions along with temperature were observed. |
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