FCVA-Synthesized Tetrahedral Amorphous Carbon Films for Biomedical Applications
Tetrahedral amorphous carbon (ta-C) films were deposited onto Si(100) wafers by using filtered cathodic vacuum arc technique (FCVA). The influence of the negative bias voltage applied to substrates on film structures was studied by Raman spectroscopy, X-ray photoemission spectroscopy (XPS). The ta-C films showed maximal sp3 fractions 87%, the hardness and elastic modulus of the ta-C film is 72 and 480 GPa, respectively. In vitro measurements of contact angle and platelet adhesion were applied to evaluate the biocompatibility of the ta-C films in comparison with that of NiTi, 316L and pure titanium. The results show that the ta-C films have hydrophobicity and exhibit better hemocompatibility which are very suitable for biomedical applications.
Wei Pan and Jianghong Gong
C. L. Zheng et al., "FCVA-Synthesized Tetrahedral Amorphous Carbon Films for Biomedical Applications", Key Engineering Materials, Vols. 336-338, pp. 1577-1580, 2007