Ni(OH) 2 nanoparticles were synthesized from reversed micelles consisted of AOT/iso-octane and Triton X-100/octanol/cyclohexane, respectively and cha racterized by UV-Vis, TEM and SEM, Ni(OH) 2 wire was prepared from the sys tem of AOT/iso- octane and Ni(OH) 2 nano-powder was obtained in th e system of Triton X-100 /octanol/cyclohexane. The sizes of Ni(OH) 2 p owder, particle and wire were ～15 nm, ～25 nm , and ～60 nm, respectivel y.
