%0 Journal Article
%K Cell viability
%K DLC
%K Ion implantation and deposition
%K Wettability
%K XPS
%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
%B Applied Surface Science
%C Boulder, CO
%D 2008
%G eng
%N 17
%R 10.1016/j.apsusc.2008.02.065
%T Functionalization of Hydrogen-free Diamond-like Carbon Films using Open-air Dielectric Barrier Discharge Atmospheric Plasma Treatments
%V 254
%1 <p>Windows and Daylighting Group</p>
%2 LBNL-265E
%8 08/2008
%X <p>A dielectric barrier discharge (DBD) technique has been employed to produce uniform atmospheric plasmas of He and N<sub>2</sub> 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/N<sub>2</sub> 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/N<sub>2</sub> 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.</p>