Research on Synthesis of Diamond-Like Carbon (DLC) Films with Assistance of Copper Ions by Electrodeposition Technique at Low Voltage

Abstract

With assistance of copper ions diamond-like carbon (DLC) films were deposited on Cu substrate by liquid-phase electrochemical deposition method from a mixture of ethanol as carbon source and deionized water containing K2CO3 as electrolytic. The electrode process was analyzed and the morphology, composition and structure of the films were studied by scanning electron microscopy (SEM) and Raman spectroscopy respectively. The results show that: on the condition of 40V and 7mm between the electrodes DLC films were deposited by adding K2CO3. With assistance of copper ions the electrode reaction was promoted, the deposition rate was improved. SEM shows that the DLC film deposited with copper ions assisting is comprised of uniformly distributed particles. And the Raman spectrum shows that the G band position moves to lower wavenumber and the ratio ID/IG decreases which indicate that there is more sp3 content in the film.