Method of manufacturing porous metal foam

A method of manufacturing a porous metal foam having pores of nano size, the method comprising the steps of:

• (a) casting an elastomer on a silicon wafer having a pattern;
• (b) curing the cast elastomer;
• (c) separating the cured elastomer;
• (d) attaching a polymer material on a glass substrate;
• (e) positioning the elastomer on the polymer material;
• (f) irradiating ultraviolet (UV) light to the material of the step (e) to form a polymer foam containing pores of nano size using diffraction and interference of light;
• (g) pre-processing the polymer foam of the step (f) to improve surface wettability of the polymer foam;
• and
• (h) coating metal on the pre-processed polymer foam through electroless plating.