%0 Journal Article %J Applied Surface Science %D 2008 %T Functionalization of Hydrogen-free Diamond-like Carbon Films using Open-air Dielectric Barrier Discharge Atmospheric Plasma Treatments %A Jose L. Endrino %A Jose F. Marco %A Phitsanu Poolcharuansin %A Ayalasomayajula R. Phani %A Matthew Allen %A José M. Albella %A André Anders %K Cell viability %K DLC %K Ion implantation and deposition %K wettability %K XPS %X

A dielectric barrier discharge (DBD) technique has been employed to produce uniform atmospheric plasmas of He and N2 gas mixtures in open air in order to functionalize the surface of filtered-arc deposited hydrogen-free diamond-like carbon (DLC) films. XPS measurements were carried out on both untreated and He/N2 DBD plasma-treated DLC surfaces. Chemical states of the C 1s and N 1s peaks were collected and used to characterize the surface bonds. Contact angle measurements were also used to record the short- and long-term variations in wettability of treated and untreated DLC. In addition, cell viability tests were performed to determine the influence of various He/N2 atmospheric plasma treatments on the attachment of osteoblast MC3T3 cells. Current evidence shows the feasibility of atmospheric plasmas in producing long-lasting variations in the surface bonding and surface energy of hydrogen-free DLC and consequently the potential for this technique in the functionalization of DLC-coated devices.

%B Applied Surface Science %C Boulder, CO %V 254 %8 08/2008 %G eng %N 17 %1

Windows and Daylighting Group

%2 LBNL-265E %& 5323 %R 10.1016/j.apsusc.2008.02.065