Regulated Grain Size of (111)-Oriented Nanotwinned Copper by Electrodeposition with Gelatin Peptone

Abstract

(111)-oriented nanotwinned copper (nt-Cu) was fabricated by direct current electrodeposition with gelatin peptone (GP) in comparison of a commonly used additive, gelatin. We found that because of smaller molecular chains, GP had less hindrance to the transverse growth of nt-Cu, compared with gelatin. Changing the GP concentration could regulate the columnar grain size, which would be beneficial to electrical properties and electromigration resistance of nt-Cu.

Keywords: Nanotwin copper, Gelatin peptone, Electrodeposition, Electronic materials