Our developed method to separate oxide ultrafine particles in smoke has been used on the formation of copper oxide particles produced by the evaporation of metallic copper in a mixture gas. Yellow and white spherical particles were gathered on the negative and positive electrode . The yellow particles were crystalline particle of cuprite and paramelaconite. The white particles were amorphous, Since the white particles were gathered on the positive electrode, the oxide is excess oxygen particles. The detail analysis on these white cupper oxide particles is under way.
