材料科学
阳离子聚合
光化学
氢键
化学工程
纳米技术
高分子化学
有机化学
分子
工程类
化学
作者
Ki Joon Heo,Dong Uk Lee,Jae Hak Shin,Jeung Hun Park,Byeong Jin Lee,Juhun Shin,Sang Bin Jeong,Gi Byoung Hwang,Alexander J. MacRobert,Ivan P. Parkin,Jae Hee Jung,Dong Yun Choi
标识
DOI:10.1021/acsami.2c16071
摘要
Healthcare-associated infections can occur and spread through direct contact with contaminated fomites in a hospital, such as mobile phones, tablets, computer keyboards, doorknobs, and other surfaces. Herein, this study shows a transparent, robust, and visible light-activated antibacterial surface based on hydrogen bonds between a transparent silica-alumina (Si-Al) sol–gel and a visible light-activated photosensitizer, such as crystal violet (CV). The study of the bonding mechanisms revealed that hydrogen bonding predominantly occurs between the N of CV and Al-OH. Apart from CV, Si-Al can be combined with a variety of dyes, highlighting its potential for wide application. The Si-Al@CV film selectively generates singlet oxygen using ambient visible light, triggering potent photochemical antibacterial performance against Gram-positive and Gram-negative bacteria. Additionally, the Si-Al@CV film is stable even after mechanical stability tests such as tape adhesion, scratch, bending, and water immersion. In vitro cytotoxicity tests using C2C12 myoblast cells showed that the Si-Al@CV film is a biocompatible material. This work suggests a new approach for designing a transparent and robust touchscreen surface with photochemical antibacterial capability against healthcare-associated infections.
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