Enhancing Antibacterial Performance and Biocompatibility of Pure Titanium by a Two-Step Electrochemical Surface Coating

• DOI: 10.1021/acsami.0c10032
• Publication Date: 2020-09-11T15:04:26Z
• Authors: Sen Yu; Dagang Guo; Jianye Han; Lijuan Sun; Hui Zhu; Zhentao Yu; Matthew Dargusch; Gui Wang
• Keywords: Biocompatibility

A two-step electrochemical surface treatment has been developed to modify the CP Ti on commercially pure titanium grade 2 (CP Ti): (1) anodic oxidation form TiO2 nanotube precoatings loaded with silver (Ag) and (2) microarc (MAO) produce a porous Ca-P-Ag coating in an electrolyte containing Ag, Ca, P. One-step MAO same also used coatings without preloaded Ag as control. Surface morphologies alloying chemistry of two were characterized by SEM, EDS, XPS. Biocompatibility antimicrobial properties have evaluated MTT method co-culture Staphylococcus aureus, respectively. It is demonstrated that high content can be achieved treatment. The optimized voltage for excellent comprehensive 350 V, which suitable chemical equilibrium between P contents Ca/P ratio 1.67 similar HA obtained, particles are size less than 100 nm embedded into underneath surface. After being contacted S. aureus 1 7 days, average bactericidal rates 99.53 89.27% no cytotoxicity was detected. In comparison, one-step contained had lower ratio, showed ability treated samples.