摘要
NANOCRYSTALLINE nickel is very important for its applications in the fields such as catalysis andmagnetic materials.The usual method used for preparing nanocrystalline nickel is inert gas e-vaporation,which requires high temperature.However,high temperature easily leads tothe growth or oxidation of nickel particles.Marignier et al.reported the nickel microaggre-gates dispersed in solution produced by γ-irradiating a dilute solution of Ni<sup>2+</sup>
