Development of a microemulsion-based process for synthesis of cobalt (Co) and cobalt oxide (Co3O4) nanoparticles from submicrometer rods of cobalt oxalate

Cobalt oxalate rods of diameter ∼300 nm were obtained at room temperature. This yields pure and uniform Co3O4 (35 nm) and Co (25 nm) nanoparticles in a controlled atmosphere (air and H2).