The properties of aerogel and xerogel iron oxide-silica nanocomposites prepared by the sol-gel method were investigated by thermal analysis, X-ray diffraction, transmission electron microscopy, Mossbauer spectroscopy and susceptibility measurements. Pure maghemite nanoparticles were obtained starting from both xerogel and aerogel samples, with particles of average size around 5 nm which tend to aggregate into the silica matrix. The role of magnetic interparticle interactions, which have a strong influence on the magnetic properties, is discussed.
Magnetic Properties of g-Fe2O3-SiO2 Aerogel and Xerogel Nanocomposite Materials
CANNAS, CARLA;CASULA, MARIA FRANCESCA;CONCAS, GIORGIO;CORRIAS, ANNA;FALQUI, ANDREA;MUSINU, ANNA MARIA GIOVANNA;
2001-01-01
Abstract
The properties of aerogel and xerogel iron oxide-silica nanocomposites prepared by the sol-gel method were investigated by thermal analysis, X-ray diffraction, transmission electron microscopy, Mossbauer spectroscopy and susceptibility measurements. Pure maghemite nanoparticles were obtained starting from both xerogel and aerogel samples, with particles of average size around 5 nm which tend to aggregate into the silica matrix. The role of magnetic interparticle interactions, which have a strong influence on the magnetic properties, is discussed.
File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
