Enhancement of Antibacterial Properties of a Silver Nanowire Film via Electron Beam Irradiation,ACS Applied Bio Materials

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Enhancement of Antibacterial Properties of a Silver Nanowire Film via Electron Beam Irradiation
ACS Applied Bio Materials ( IF 4.6 ) Pub Date : 2020-03-09 , DOI: 10.1021/acsabm.0c00003
Ji-Hyeon Kim ₁ , Junfei Ma _{1,

2} , Sungjin Jo ₂ , Seunghun Lee ₁ , Chang Su Kim ₁

Affiliation

Infectious diseases and the deaths caused due to contact with germ-contaminated surfaces are severe problems worldwide. Antibacterial materials based on silver nanowires (AgNWs) have a structural advantage when addressing this issue; this is because agglomeration is minimized when nanowires are fabricated into a film. Therefore, employing AgNWs for antimicrobial applications has garnered continuous interest, and increased research for further improvements has been observed. In this study, a AgNW film was fabricated onto glass by spin-coating and then subjected to surface irradiation up to a dose of 1200 kGy, using a low-energy electron beam (e-beam). This “e-beam” irradiation changed the surface morphology and chemical composition; consequently, this improved the performance of the film. The generation of a silver oxide (Ag₂O and AgO) outer layer was identified over the AgNWs by X-ray photoelectron spectroscopy (XPS). The antibacterial test corresponding to a contact time of 1 h revealed that the e-beam irradiation increased the antibacterial activity in the log reduction from 1.2 to 1.4 for Staphylococcus aureus and from 1.5 to 3.7 for Escherichia coli. Based on the experimental results and the known antibacterial mechanisms of silver (Ag) nanospecies, we discuss the method by which the antibacterial performance of the AgNW film was improved via the e-beam irradiation. This work provides a simple and swift method to functionally enhance the AgNW antibacterial film via e-beam irradiation.

中文翻译：

通过电子束辐照增强银纳米线薄膜的抗菌性能

传染病和因接触受细菌污染的表面而导致的死亡是世界范围内的严重问题。基于银纳米线 (AgNWs) 的抗菌材料在解决这一问题时具有结构优势；这是因为当纳米线被制成薄膜时，聚集最小化。因此，将 AgNWs 用于抗菌应用已经引起了人们的持续关注，并且已经观察到增加的研究以进一步改进。在这项研究中，通过旋涂在玻璃上制造了 AgNW 薄膜，然后使用低能电子束（电子束）进行表面照射，剂量高达 1200 kGy。这种“电子束”照射改变了表面形态和化学成分；因此，这提高了电影的性能。氧化银（Ag_{通过 X 射线光电子能谱 (XPS) 在 AgNW 上识别出2} O 和 AgO) 外层。对应于 1 小时接触时间的抗菌测试表明，电子束照射使金黄色葡萄球菌的抗菌活性从 1.2 降低到 1.4，大肠杆菌从 1.5 降低到 3.7 。基于实验结果和银（Ag）纳米物质的已知抗菌机制，我们讨论了通过电子束照射提高AgNW薄膜抗菌性能的方法。这项工作提供了一种简单快捷的方法，通过电子束照射在功能上增强 AgNW 抗菌膜。

更新日期：2020-04-23

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