IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Mössbauer Effect phase determination in iron oxidepolyaniline nanocomposites
Autor/es:
J. C. APHESTEGUY; S. E. JACOBO; C. E. RODRÍGUEZ TORRES; M.B. FERNÁNDEZ VAN
Revista:
HYPERFINE INTERACTIONS
Editorial:
Springer,
Referencias:
Lugar: Hyperfine Interactions; Año: 2008
ISSN:
0304-3843
Resumen:
Mössbauer
Effect spectroscopy and thermal analysis techniques were applied to characterize
polyaniline composites successfully synthesized by embedding Fe oxide
nanoparticles (about 10-13 nm) in a polymeric matrix in the presence of Dodecyl
Benzene Sulfonic Acid and HCl (dopant). Thermal
techniques provided quantitative information on iron oxide content and on
polyaniline stability and transformations. Mössbauer results indicated that for
the whole studied composition range, 3.4 to 100 iron oxide wt. %, composites
hold maghemite particles.
A preliminary study of the conductivity of the nanocomposites was performed.
The largest conductivity was observed for a 8 wt.% maghemite composite where
all particles are magnetically unblocked at room temperature within the
Mössbauer time window.