TY - JOUR T1 - Functionalization of Hydrogen-free Diamond-like Carbon Films using Open-air Dielectric Barrier Discharge Atmospheric Plasma Treatments JF - Applied Surface Science Y1 - 2008/08// A1 - Jose L. Endrino A1 - Jose F. Marco A1 - Phitsanu Poolcharuansin A1 - Ayalasomayajula R. Phani A1 - Matthew Allen A1 - José M. Albella A1 - André Anders KW - Cell viability KW - DLC KW - Ion implantation and deposition KW - wettability KW - XPS AB - 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. CY - Boulder, CO VL - 254 IS - 17 U1 -

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U2 - LBNL-265E DO - 10.1016/j.apsusc.2008.02.065 ER -