ABSTRACT

In this research, Al₂O₃-Ag anodic coating was synthesised by a single-step anodising and the antibacterial properties were investigated. The microstructure of the coatings was studied by FESEM and XRD analyses. The hardness test was also carried out to assess the mechanical properties of the coatings. Antimicrobial susceptibility and colony count test (CFU) methods were used to evaluate the antibacterial behaviour. The results showed that the microstructure of the coatings were amorphous with a columnar structure containing the longitudinal porosities. The average pore diameter was obtained about 55 nm and 13 nm for Al₂O₃-Ag and Al₂O₃ coatings, respectively. Moreover, the antibacterial results also demonstrated that the composite anodic films had the antibacterial activity whilst the Gram-negative bacteria were more sensitive against silver nanoparticles in comparison with the Gram-positive bacteria.

摘要

在这项研究中，通过一步阳极氧化合成了Al ₂ O ₃ -Ag 阳极涂层，并研究了其抗菌性能。通过FESEM和XRD分析研究了涂层的微观结构。还进行了硬度测试以评估涂层的机械性能。抗菌药物敏感性和菌落计数测试 (CFU) 方法用于评估抗菌行为。结果表明，涂​​层的微观结构是非晶的，具有包含纵向孔隙的柱状结构。对于 Al ₂ O ₃ -Ag 和 Al ₂ O ₃获得的平均孔径约为 55 nm 和 13 nm涂料，分别。此外，抗菌结果还表明复合阳极膜具有抗菌活性，而与革兰氏阳性菌相比，革兰氏阴性菌对银纳米颗粒更敏感。