Pathogenic microbial infections are threatening the people's health and even life.The most common channel of infections can be caused by skin contact,especially hand touching facilities such as touch-ing screen.In this work,Cu2O covered with ZnO nanofilm was prepared on the surface of indium tin oxide conductive glass by electrodeposition and the followed atomic layer deposition process.This com-posite coating had a light transmittance of 71.5％,which met the light transmission needs of touch screen device.Electron spin resonance spectra showed that composite materials can generate more reactive oxy-gen species(ROS)than a single component under solar light irradiation.This was because a p-n junction with a built-in electric field was formed at the interface after Cu2O contacting with ZnO.In the process of photocatalysis,photogenerated electrons and holes migrated at the interface driven by the built-in elec-tric field,which promoted the separation of carriers.The antibacterial rate against Staphylococcus aureus reached 92.5％after 3 min of light irradiation with simulated sunlight due to the synergy of ROS and Cu ions,Zn ions.Therefore,this work may provide a potential method for antibacterial application of preventing hand touch infections.

School of Materials Science&Engineering,the Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China,Tianjin University,Tianjin 300072,China;School of Life Science and Health Engineering,Hebei University of Technology,Tianjin 300401,China;School of Materials Science&Engineering,Peking University,Beijing 100871,China

[1]Zexin Liu;Xiangmei Liu;Zhenduo Cui;Yufeng Zheng;Zhaoyang Li;Yanqin Liang;Xubo Yuan;Shengli Zhu;Shuilin Wu-.Surface photodynamic ion sterilization of ITO-Cu2O/ZnO preventing touch infection)[J].材料科学技术（英文版）,2022(27):10-19

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