【摘要】 本文用革兰氏阳性菌-金黄色葡萄球菌和革兰氏阴性菌-大肠杆菌研究了注银医用热解碳的抗菌性。注入银离子的能量为70 keV,剂量分别为5×1014、1×10155、×1015、1×1016、5×1016ions/cm2。用卢瑟福背散射分析(RBS)和X射线光电子能谱(XPS)对注银热解碳的表面进行了微观分析。抗菌实验结果表明,样品的抗菌率随着注入剂量的增大而增大,当注入剂量高于1×1016ions/cm2时,注银热解碳对金黄色葡萄球菌和大肠杆菌的抗菌率接近100%。RBS和XPS分析结果表明,银离子注入到热解碳表层,且浓度随注入剂量的增大而增加,富银的表面层起到抑菌和杀菌作用。更多还原

【Abstract】 Bactericidal properties of Ag⁺-implanted pyrolitic carbon was studied.Surface morphology and microstructures of pyrolitic carbon implanted with different doses of Ag ions was characterized with Rutherford back scattering（RBS） and X-ray photoelectron spectroscopy（XPS）.The results show that Ag ion usually segregates to the surface of the carbon and Ag surface concentration increases with the increase of implanted Ag dose and that Ag-rich surface layer effectively kills bacteria,including Gram positive staphylococcus aureus and Gram negative E.coli.As Ag dose increases,the antibacterial ratio goes up,reaching 100% at a dose of 1×10¹⁶.更多还原