Abstract
La 2O 3 doped diamond-like carbon films (DLC) with different concentration were deposited by using Radio-Frequency magnetron sputtering. The microstructure and surface properties of DLC films were characterized by Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and contact angle test. The blood compatibility of the samples was evaluated by tests of platelet adhesion. Results show the sp 2-bonded C content increases with increasing of La 2O 3 concentration doped. A remarkable decrease of platelet adhered on the surface of the La 2O 3 doped DLC films was observed comparing to the Chrono flex used in clinical application, suggesting that La 2O 3 doped DLC is able to enhance its blood compatibility. The mechanism of hemocompatibility of doped films was discussed. Our results demonstrate that La 2O 3 doped DLC films are potentially useful biomaterials with good blood compatibility.
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