Functional Nanomaterials Laboratory, Center for Micro/Nanomaterials and Technology, and Key Laboratory of Photochemical Conversion and Optoelectronic Materials , Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Zhongguancundonglu 29 , Haidianqu, Beijing 100190 , China.
University of Chinese Academy of Sciences , Beijing 100049 , China.
ACS Appl Mater Interfaces. 2018 Apr 4;10(13):11189-11196. doi: 10.1021/acsami.8b00192. Epub 2018 Mar 26.
Thin films that integrate antireflective and antibacterial dual functions are not only scientifically interesting but also highly desired in many practical applications. Unfortunately, very few studies have been devoted to the preparation of thin films with both antireflective and antibacterial properties. In this study, mesoporous silica (MSiO) thin films with uniformly dispersed Ag nanoparticles (Ag NPs) were prepared through a one-pot process, which simultaneously shows high transmittance, excellent antibacterial activity, and mechanical robustness. The optimal thin-film-coated glass substrate demonstrates a maximum transmittance of 98.8% and an average transmittance of 97.1%, respectively, in the spectral range of 400-800 nm. The growth and multiplication of typical bacteria, Escherichia coli ( E. coli), were effectively inhibited on the coated glass. Pencil hardness test, tape adhesion test, and sponge washing test showed favorable mechanical robustness with 5H pencil hardness, 5A grade adhesion, and functional durability of the coating, which promises great potential for applications in various touch screens, windows for hygiene environments, and optical apparatuses for medical uses such as endoscope, and so on.
具有抗反射和抗菌双重功能的薄膜不仅在科学上具有趣味性，而且在许多实际应用中也备受期待。然而，目前很少有研究致力于制备同时具有抗反射和抗菌性能的薄膜。在这项研究中，通过一锅法制备了具有均匀分散的 Ag 纳米颗粒（Ag NPs）的介孔二氧化硅（MSiO）薄膜，该薄膜同时具有高透光率、优异的抗菌活性和机械坚固性。在 400-800nm 的光谱范围内，优化后的薄膜涂层玻璃基底的最大透过率分别为 98.8%和平均透过率为 97.1%。典型细菌（大肠杆菌）的生长和繁殖在涂覆玻璃上被有效抑制。铅笔硬度测试、胶带粘贴测试和海绵清洗测试显示出良好的机械坚固性，铅笔硬度为 5H，附着力为 5A 级，涂层具有功能耐久性，这为在各种触摸屏、卫生环境用窗户以及内窥镜等医疗光学仪器等领域的应用提供了巨大的潜力。
