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

The synthesis of well-dispersed composite Ni/NiO nanoparticles of controlle d size has been achieved in organic solution in the presence of polyvinylpy rrolidone, using biscycloocta-1,5-diene nickel as a precursor, upon control ling the water and dioxygen content of the reacting medium. The particles a re characterized by magnetisation measurements. Transmission Electron Micro scopy 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.