摘要
对氮离子注入热解碳及在热解碳表面离子束增强沉积钛氧化物薄膜进行了研究，采用Ｘ 光电子能谱仪，俄歇电子能谱仪测定了表面改性层的成份和价态，用四探针方法测定了表面电阻率，用接触角方法测定了材料表面能，用动态凝血时间及血小板粘附评价了表面改性层的血液相容性。研究表明，热解碳经表面Ｎ＋ 离子注入后有碳氮化合物形成，其血液相容性有所改善，而采用离子束增强沉积合成ＴｉＯ２－ ｘ薄膜则使热解碳血液相容性获得了显著改善。
In this study, nitrogen ion implantation and titanium oxide film synthesized by ion beam enhanced deposition were adopted to treat low temperature isotropic pyrolytic carbon(LTIC).The chemical composition and valence state of the modified layer were determined by X ray photoelectron spectroscopy (XPS) and Auger eletron spectroscopy (AES).The electric resisitance and the surface energy were measured by the four probe system and the contact angle method respectively. The blood compatibility of the modified LTIC was evaluated by clotting time measurement and platelet adhesion test. The results showed that carbon nitride was formed on the LTIC surface after N + ion implantation, which had some effect on the improvement of blood compatibility, and a significant improvement of blood compatibility of LTIC coated by TiO 2-x film was verified.
出处
《生物医学工程学杂志》
EI
CAS
CSCD
北大核心
1999年第2期127-131,共5页
Journal of Biomedical Engineering
基金
国家自然科学基金
关键词
人工心脏瓣膜
LTIC
表面改性
热解碳
Artificial heart valve material LTIC Surface modification Ion beam Blood compatibility
