Copper Nano powder-50, Copper nanoparticle, Nano-copper powder, Nanometer copper powder, Nano Copper Average particle size: 20nm ( XRD) Size distribution: 10-30nm Purity: 99.9+ % Appearance: Purple-brown or purplish black powder Shape: Spherical Specific surface area: 10-35m2/ g Apparent density: 0.15g/ cm3)