Development of surfaces with antibacterial durability through combined S phase plasma hardening and athermal femtosecond laser texturing
Development of surfaces with antibacterial durability through combined S phase plasma hardening and athermal femtosecond laser texturing
复制标题
DOI：
10.1016/j.apsusc.2021.150594
复制
发表时间：
2021-07-16
影响因子：
6.7
通讯作者：
Dong, Hanshan
中科院分区：
文献类型：
--
作者：
Dashtbozorg, Behnam;Penchev, Pavel;Dong, Hanshan
抗菌质地为经常影响食品和医疗行业的食品和医疗保健获得性感染的交叉污染问题提供了一个有吸引力的解决方案。然而，与这种纹理相关的功能特性通常是由于脆弱的纳米级特征而产生的，不幸的是，几乎没有关于这些特征的寿命或它们带来的特性的信息。因此，本研究检测了利用飞秒脉冲激光毛化技术在未经处理和S相硬化的AISI316L奥氏体不锈钢表面生产的最先进的三角形LIPSS的抗菌耐久性。在佩戴前，三角LIPSS被发现对金黄色葡萄球菌(90%减少)和大肠杆菌(>；75%减少)具有很强的抗菌性能。在大面积磨损后，未经处理和有纹理的表面对细菌定植的敏感性显著增加(增加50%)，而在S相硬化的样品上几乎没有变化(
Antibacterial textures provide an attractive solution to the problem of cross contamination of foods and healthcare-acquired infections that regularly affect the food and medical industries. However, the functional properties associated with such textures typically arise due to fragile nanoscale features, and unfortunately, there is almost no information available on the longevity of those features or the properties that they bring. Therefore, this study has examined the antibacterial durability of state-of-the-art triangular LIPSS produced using femtosecond pulsed laser texturing on untreated and S phase hardened AISI 316L austenitic stainless steel surfaces. Prior to wearing, the triangular LIPSS were found to have strong antibacterial properties against S. aureus ( 90% reduction) and E. coli (>75% reduction). Following large area wearing, the untreated and textured surfaces became dramatically more susceptible (>50% increase) to bacterial colonisation, while almost no change was found on S phase hardened samples (