Synthesis of CuO nanowires from microwires

CuO nanowires with a diameter of 50—80 nm and a length of several micrometers were prepared from a microwire with a diameter of 30 ?m by integrating electroplating and thermal oxidation.The effects of the oxidation time and temperature on CuO nanowire growth were investigated.The results indicate that the length of the nanowires increases when oxidation time increases and better uniformity can be obtained after 4 h oxidation.It also indicates that aligned and vertical CuO nanowires can grow well under 450—500 ℃.When oxidation was conducted under 500 ℃ for more than 4 h,and cooled down naturally to room temperature,large amount of long and uniform nanowires were formed.