Blood-compatibility of La_2O_3 Doped Amorphous Carbon Film
La2O3 doped amorphous carbon(a-C) films were deposited on silicon substrates using a Radio-Frequency magnetron sputtering.The effect of doped rare earth on the microstructure,composition,surface morphology and hydrophilicity of a-C films were studied using Raman spectra and XPS,respectively.Results show that rare earth addition has a suppressive effect on the ratio of sp3-bond to sp2-bond in the a-C films and the hydrophobicity of rare earth doped a-C films is increased.The observation of platelet adhesion shows that the anti-cruor of a-C films can be improved by rare earth doped and the sample added appropriate rare earth shows the best blood compatibility.The mechanism of haemocompatibility of a-C films doped rare earth is discussed.