Department of Chemistry, City University of Hong Kong, 999077, Hong Kong, China.
Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction and Institute for Advanced Study, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
ACS Nano. 2020 Sep 22;14(9):12045-12053. doi: 10.1021/acsnano.0c05330. Epub 2020 Aug 20.
Wearing face masks has been widely recommended to contain respiratory virus diseases, yet the improper use of masks poses a threat of jeopardizing the protection effect. We here identified the bacteria viability on common face masks and found that the majority of bacteria (90%) remain alive after 8 h. Using laser-induced graphene (LIG), the inhibition rate improves to ∼81%. Combined with the photothermal effect, 99.998% bacterial killing efficiency could be attained within 10 min. For aerosolized bacteria, LIG also showed superior antibacterial capacity. The LIG can be converted from a diversity of carbon precursors including biomaterials, which eases the supply stress and environmental pressure amid an outbreak. In addition, self-reporting of mask conditions is feasible using the moisture-induced electricity from gradient graphene. Our results improve the safe use of masks and benefit the environment.
佩戴口罩已被广泛推荐用于控制呼吸道病毒疾病，但口罩使用不当会威胁到防护效果。我们在这里确定了常见口罩上细菌的存活能力，发现大多数细菌（90%）在 8 小时后仍具有活力。使用激光诱导石墨烯（LIG），抑制率提高到约 81%。结合光热效应，在 10 分钟内可达到 99.998%的细菌杀灭效率。对于气溶胶化细菌，LIG 也表现出优异的抗菌能力。LIG 可以由多种碳前体转化而成，包括生物材料，这在疫情期间缓解了供应压力和环境压力。此外，使用梯度石墨烯产生的湿气诱导电来自我报告口罩状况是可行的。我们的研究结果提高了口罩的安全使用，有利于环境保护。
