In recent years, increasing interest has been paid to the synthesis of submicrometer powders with specific structures and functions. In this paper, a further study has been carried out on the hollow nickel spheres synthesized by autocatalytic reduction to find that the size distribution of the nickel spheres largely depended on the original colloidal particles and reaction incubation period. And the hollow nickel spheres and core-shell particles with specific structures can be fabricated by controlling processing parameter.

Key words: hollow nickel sphere, submicrometer-sized powder, autocatalytic reduction, colloid template