【2022年影響因子/JCR分區：10.588/Q1】《JOURNAL OF HAZARDOUS MATERIALS》 1 / 1 Bioinspired nanopillar surface for switchable mechano-bactericidal and releasing actions
作者：Yaozhen Yi a , Rujian Jiang b , Ziting Liu a , Haixu Dou a , Lingjie Song c,* , Limei Tian a , Weih
關鍵字：Nanostructure, Reversible switch , Long-term antibacterial , Antibiotic resistance
論文來源：期刊
具體來源：JOURNAL OF HAZARDOUS MATERIALS
發表時間：2022年
Constructing safe and effective antibacterial surfaces has continuously received great attention, especially in healthcare-related fields. Bioinspired mechano-bactericidal nanostructure surfaces could serve as a promising strategy to reduce surface bacterial contamination while avoiding the development of antibiotic resistance. Although effective, these nanostructure surfaces are prone to be contaminated by the accumulation of dead
bacteria, inevitably compromising their long-term antibacterial activity. Herein, a bioinspired nanopillar surface with both mechano-bactericidal and releasing actions is developed, via grafting zwitterionic polymer (poly (sulfobetaine methacrylate) (PSBMA)) on ZnO nanopillars. Under dry conditions, this nanopillar surface displays remarkable mechano-bactericidal activity, because the collapsed zwitterionic polymer layer makes no essential influence on nanopillar structure. Once being incubated with aqueous solution, the surface could readily detach
the killed bacteria and debris, owing to the swelling of the zwitterionic layer. Consequentially, the surface antibacterial performances can be rapidly and controllably switched between mechano-bactericidal action and bacteria-releasing activity, guaranteeing a long-lasting antibacterial performance. Notably, these collaborative antibacterial behaviors are solely based on physical actions, avoiding the risk of triggering bacteria resistance. The resultant nanopillar surface also enjoys the advantages of substrate-independency and good biocompatibility, offering potential antibacterial applications for biomedical devices and hospital surfaces.