Deposition and evaluation of antimicrobial properties of Cu/DLC multilayered films

抄録

There are various bacteria and viruses in our living environment, and they sometimes cause serious infectious diseases. Currently, the threat is expanding due to the changes in the environment and the demand for antimicrobial products is increasing year by year. Surface composition and shape are important factors of antiviral properties. Thus, we propose the mechanical coating with antibacterial and antiviral surface. Diamond-Like Carbon (DLC) film consists of a mixture of sp2 covalent bonded and sp3 covalent bonded carbon atoms and hydrogen atoms. DLC films have characteristics such as high hardness, low friction coefficient, abrasion resistance and so on. Furthermore, these properties of DLC film are changed by doping other elements. On the other hand, it is widely known that copper is one of the antimicrobial properties. Therefore, in this study, we synthesized segment structured DLC films adapted copper which are deposited by plasma chemical vapor deposition (plasma CVD) and magnetron sputtering, and we analyzed mechanical, antibacterial properties of the films. Cu/DLC multilayered films demonstrated antibacterial properties upon wear, providing a viable approach to confer antibacterial properties on DLC films through mechanical coating by combining copper and textured structures. The worn Cu/DLC multilayered films also exhibited effectiveness against A-type influenza virus.