Functionalization of Hydrogen-free Diamond-like Carbon Films using Open-air Dielectric Barrier Discharge Atmospheric Plasma Treatments

TitleFunctionalization of Hydrogen-free Diamond-like Carbon Films using Open-air Dielectric Barrier Discharge Atmospheric Plasma Treatments
Publication TypeJournal Article
Year of Publication2008
AuthorsJose L. Endrino, Jose F. Marco, Phitsanu Poolcharuansin, Ayalasomayajula R. Phani, Matthew Allen, José M. Albella, André Anders
JournalApplied Surface Science
Volume254
5323
Issue17
Date Published08/2008
KeywordsCell viability, DLC, Ion implantation and deposition, wettability, XPS
Abstract

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.

DOI10.1016/j.apsusc.2008.02.065
LBNL Report Number

LBNL-265E