Self-Reporting and Photothermally Enhanced Rapid Bacterial Killing on a Laser-Induced Graphene Mask

Huang, LB (Huang, Libei)^{[ 1 ]} ; Xu, SY (Xu, Siyu)^{[ 1 ]} ; Wang, ZY (Wang, Zhaoyu)^{[ 2,3 ]} ; Xue, K (Xue, Ke)^{[ 4 ]} ; Su, JJ (Su, Jianjun)^{[ 1 ]} ; Song, Y (Song, Yun)^{[ 1 ]} ; Chen, SJ (Chen, Sijie)^{[ 5 ]} ; Zhu, CL (Zhu, Chunlei)^{[ 4 ]} ; Tang, BZ (Tang, Ben Zhong)^{[ 2,3,6,7,8,9 ]} ; Ye, RQ (Ye, Ruquan)^{[ 1,10 ]}

ACS NANO, 2020, 14(9): 12045-12053

DOI: 10.1021/acsnano.0c05330

摘要

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 similar 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.