Method for producing a carbon layer-covering transition metallic nano-structure or transition metallic nano-structure pattern and carbon layer-covering transition metallic nano-structure or transition metallic nano-structure pattern

摘要

An anhydrous chloride with a formula of MCl2 (M=Fe, Co or Ni) is dissolved into an anhydrous acetonitrile solvent to form a chloride-acetonitrile solution. Then, calcium carbide minute powders are added and dispersed in the chloride-acetonitrile solution to form a reactive solution. Then, the reactive solution is thermally treated (first thermal treatment) to form a nano-powder made of a transition metal acetylide compound having an M-C2-M bond, a tetragonal structure, and a formula of MC2 (herein, M=Fe, Co or Ni). Then, the nano-powder is thermally treated (second thermal treatment) again at a temperature higher than the temperature in the first thermal treatment to form a carbon layer-covering transition metallic nano-structure wherein a metallic core made of the transition metal M is covered with a carbon layer.