Polyol synthesis of (polyvinylpyrrolidone) PVP-Mn3O4 nanocomposite

We report on the synthesis of (polyvinylpyrrolidone) PVP-Mn3O4 nanocomposite via a polyol route. Crystalline phase was identified as Mn3O4 and the crystallite size was obtained as 6 +/- 1 nm from X-ray line profile fitting. Average particle size of 6.1 +/- 0.1 nm obtained from TEM analysis reveals n...

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Bibliographic Details
Published in:Journal of alloys and compounds 2010-07, Vol.502 (1), p.199-205
Main Authors: BAYKAL, A, BITRAK, N, ÜNAL, B, KAVAS, H, DURMUS, Z, ÖZDEN, S, TOPRAK, M. S
Format: Article
Language:English
Subjects:
ac conductivity
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Cross-disciplinary physics: materials science
rheology
Diamagnetism, paramagnetism and superparamagnetism
Dielectric properties of solids and liquids
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Exact sciences and technology
Magnetic properties and materials
Magnetic properties of nanostructures
Magnetization
Materials science
Nanocomposite
Nanomagnetic materials
Nanopowders
Nanoscale materials and structures: fabrication and characterization
Permittivity (dielectric function)
Physics
TECHNOLOGY
TEKNIKVETENSKAP
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Summary:We report on the synthesis of (polyvinylpyrrolidone) PVP-Mn3O4 nanocomposite via a polyol route. Crystalline phase was identified as Mn3O4 and the crystallite size was obtained as 6 +/- 1 nm from X-ray line profile fitting. Average particle size of 6.1 +/- 0.1 nm obtained from TEM analysis reveals nearly single crystalline nature of these nanoparticles in the composite. The capping of PVP around Mn3O4 nanoparticles was confirmed by FT-IR spectroscopy, the interaction being via bridging oxygens of the carbonyl (C=O) and the nanoparticle surface. T-C and T-B for PVP-Mn3O4 nanocomposite were observed at 42K and 28.5 K, respectively. The sample has hysteresis with small coercivity and remanent magnetization at 40K, resembling the superparamagnetic state. ac conductivity measurements on PVP-Mn3O4 nanocomposite revealed a conductivity in the order of 10(-7) S cm(-1) at lower frequencies. The conductivity change with respect to frequency can be explained by electronic exchange occurring between Mr(+2) and Mn+3 existing in sublattice of spinel lattice.
ISSN:0925-8388
1873-4669
1873-4669
DOI:10.1016/j.jallcom.2010.04.143