New procedure towards well-dispersed nickel oxide nanoparticles of controlled size

The synthesis of well-dispersed composite Ni/NiO nanoparticles of controlled size has been achieved in organic solution in the presence of polyvinylpyrrolidone, using biscycloocta-1,5-diene nickel as a precursor, upon controlling the water and dioxygen content of the reacting medium. The particles are characterized by magnetisation measurements. Transmission Electron Microscopy and Wide Angle X-ray Scattering The oxidation of these particles into, NiO nanoparticles can be achieved in mild conditions and preserves their dispersion in the polymer matrix. (C) 2001 Academie des sciences. Editions scientifiques et medicales Elsevier SAS.