Fe2O3/SiO2 Hybrid Nanocomposites Studied Mainly by Mössbauer Spectroscopy

A. Lančok a,b, P. Bezdička b, M. Klementová b, K. Závěta a,c and C. Savii d a Joint Lab. of Low Temp., Inst. of Phys. ASCR, v.v.i., IIC ASCR, v.v.i., MFF UK, and Fac. of Nat. Sc. UK, V Holešovičkách 2, 180 00 Prague, Czech Republic b Institute of Inorg. Chemistry ASCR, v.v.i., 250 68 Řežnear Prague, Czech Republic c Institute of Physics, ASCR, v.v.i., Na Slovance 2, 182 21 Prague, Czech Republic d Institute of Chemistry, Romanian Academy, 24 Mihai Viteazul Blvd., Timisoara 300223, Romania

Full Text PDF

Received: 9 07 2007;

Magnetic nanocomposites exhibit promising applications in many areas, for example optics, electronics, biology, medicine, etc. The main goal of this study was to synthesize magnetic ε-Fe2O3 nanoparticles embedded in amorphous SiO2. These materials were prepared by the help of ultrasonic activation and subsequent annealing in nitrogen atmosphere or air with concentrations of iron oxide of about 20 and 30 wt.%. The structure and properties of the final product were analysed by the Mössbauer spectrometry as well as by X-ray diffraction, scanning electron microscopy, and high resolution transmission electron microscopy. They strongly depend on the initial conditions of preparation.

DOI: 10.12693/APhysPolA.113.577 PACS numbers: 75.50.Tt, 76.80.+y