Dresden 2009 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 66: Organic, polymeric, biomolecular films – also with absorbates II
O 66.5: Vortrag
Freitag, 27. März 2009, 12:15–12:30, SCH A316
Magnetron sputtered hydrogenated (a-C:H) and oxygen containing (a-C:O) amorphous carbon coatings: surface characteristics, wettability and cell absorption behaviour — •Friederike Danneil — Forschungszentrum Karlsruhe, Institut für Materialforschung I, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
Hydrogenated amorphous carbon (a-C:H) coatings are considered good potential materials for biomedical applications. Hydrogen-free, oxygen containing amorphous carbon (a-C:O) coatings exhibit promising haemocompatible properties but have not yet been investigated very detailed. The objective of this work is the characterization of the surface characteristics, surface properties, wettability and haemocompatibility both of a-C:H and a-C:O coatings prepared by reactive d.c. magnetron sputtering.
The coatings were deposited on Si wafer substrates by sputtering a graphite target in a mixture of methane and argon (Ar+CH4) and a mixture of oxygen and argon (Ar+O2), respectively. The reactive gas fractions were systematically varied during the experiments. For the surface characterization atomic force microscopy (AFM), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS) were applied. The surface free energy was determined by contact angle measurements. A platelet adhesion test showed favourable behaviour of the a-C:O coatings for blood-contacting applications.