类金刚石薄膜制备及其结构和抗凝血研究

Study on preparation,structures and anticoagulation properties of diamond-like carbon films

采用240nm KrF脉冲激光沉积方法,在Si(100)衬底上制备类金刚石薄膜,利用椭圆偏振光谱和拉曼光谱研究薄膜键结构及光学性质,用血小板黏附实验研究薄膜的抗凝血性能及脉冲重复频率影响.结果表明,脉冲激光沉积制备的类金刚石薄膜sp3 C含量高,且抗凝血性能佳,脉冲重复频率增大使入射碳离子能量增加,薄膜的sp3键成分先升后降,在脉冲重复频率为50Hz时达到最大值;类金刚石薄膜的sp3键成分影响其抗凝血性能,sp3键成分越高,其抗凝血性能越好.

Diamond-like carbon （DLC） films on Si （100） substrates were prepared by a 240 nm KrF pulse laser. Studies were made of the effects of the pulse repetition rate （PRR） on the film microstructures, optical and anticoagulation properties by spectroscopic ellipsometry, Raman spectroscopy and platelet adhesion test, respectively. The results show that our DLC samples have high Sp^3 C contents and good anticoagulation. The Sp^3 C contents and the anticoagulation of the films are affected by the PRR due to the different energies of incident carbon ions. The Sp^3 C contents of the films generally increase with the PRR, reaching maximum values at the rate of 50 Hz and then de- crease. Moreover, DLC films with higher Sp^3 C contents have better anticoagulation.