Solvothermal Synthesis of Nanostructured Cobalt Fiber Under Microemulsion Media

By using the combination of solvothermal and microemulsion methods, hierarchical cobalt nanorods with 70 nm width and 3-9 mm length have been prepared under mild conditions. The nanorods are composed of a bundle of similar to 20 nm wide whiskers, which are composed of spherical nanoparticles (5 nm). It is suggested that the co-operation of the reduction of Co2+ and the transition from spherical micelles into hexagonal rod-like micelles lead to the formation of the nanostructured cobalt filaments.