Template synthesis of highly crystalline and monodisperse iron oxide pigments of nanosize

Autores: Sreeram, K.J.|Indumathy, R.|Rajaram, A.|Nair, B.U.|Ramasami, T.
Fuente: Mater. res. bull.
41 (10), 1875-1881
2006

Synthesis of highly crystalline and monodisperse iron oxide nanoparticles is reported. The separation of Fe centers through site-specific binding to a polysaccharide-alginate matrix enables the generation of particles with a monodisperse or narrow size distribution character, resulting in transparent pigments. Site-specific interactions coupled with gel like character of alginate is proposed as the mechanism behind generation of lower particle sizes. Alginate-Fe complexes developed were subjected to heat treatment to provide for crystalline character and development of hematite (alpha-Fe2O3). Conditions most ideal for achieving monodispersity and lower sizes have been optimized and confirmed through microscopic and photon correlation spectroscopic measurements. tration of x = 0.4, showed the highest value of initial permeability