Nano-twinned crystal film prepared by water/alcohol-soluble organic additives and method of fabricating the same

A method of fabricating a nano-twinned crystal film, comprising:

• utilizing an electrolyte solution including copper salt, acid, and a water-soluble or alcohol-soluble organic additive;
• adjusting a content of the water-soluble or alcohol-soluble organic additive;
• and
• performing an electrodeposition process, under conditions of a current density of 20-100 mA/cm2, a voltage of 0.2-1.0 V, and a cathode-anode distance of 10-300 mm, to form the nano-twinned crystal film on a surface of the cathode, wherein the nano-twinned crystal film has a plurality of nano-twinned copper grains, and at least some of the nano-twinned copper grains have a pillar cap configuration with a wide top and a narrow bottom and are arranged in a truss structure with a region of random crystal phases between the at least some of the nano-twinned copper grains.