Suh In-Yong, Huo Zheng-Yang, Jung Jae-Hwan, Kang Donghyeon, Lee Dong-Min, Kim Young-Jun, Kim Bosung, Jeon Jinyoung, Zhao Pin, Shin Jeonghune, Kim SeongMin, Kim Sang-Woo
School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea.
School of Environment and Natural Resources, Institute of Ecological Civilization, Renmin University of China, Beijing 100872, PR China.
Sci Adv. 2024 May 3;10(18):eadl5067. doi: 10.1126/sciadv.adl5067.
Airborne pathogens retain prolonged infectious activity once attached to the indoor environment, posing a pervasive threat to public health. Conventional air filters suffer from ineffective inactivation of the physics-separated microorganisms, and the chemical-based antimicrobial materials face challenges of poor stability/efficiency and inefficient viral inactivation. We, therefore, developed a rapid, reliable antimicrobial method against the attached indoor bacteria/viruses using a large-scale tunneling charge-motivated disinfection device fabricated by directly dispersing monolayer graphene on insulators. Free charges can be stably immobilized under the monolayer graphene through the tunneling effect. The stored charges can motivate continuous electron loss of attached microorganisms for accelerated disinfection, overcoming the diffusion limitation of chemical disinfectants. Complete (>99.99%) and broad-spectrum disinfection was achieved <1 min of attachment to the scaled-up device (25 square centimeters), reliably for 72 hours at high temperature (60°C) and humidity (90%). This method can be readily applied to high-touch surfaces in indoor environments for pathogen control.
空气传播病原体一旦附着在室内环境中，就会保持较长时间的感染活性，对公众健康构成普遍威胁。传统的空气过滤器对物理分离的微生物灭活效果不佳，而基于化学的抗菌材料则面临稳定性/效率差和病毒灭活效率低的挑战。因此，我们开发了一种快速、可靠的抗菌方法，用于对抗附着在室内的细菌/病毒，该方法使用通过将单层石墨烯直接分散在绝缘体上制成的大规模隧道电荷驱动消毒装置。自由电荷可以通过隧道效应稳定地固定在单层石墨烯下方。储存的电荷可以促使附着微生物持续电子损失以加速消毒，克服化学消毒剂的扩散限制。在与放大装置（25平方厘米）接触不到1分钟的时间内，即可实现完全（>99.99%）且广谱的消毒，在高温（60°C）和高湿度（90%）条件下可靠地持续72小时。该方法可轻松应用于室内环境中的高接触表面以控制病原体。
