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Superlattice Nanofilm on a Touchscreen for Photoexcited Bacteria and Virus Killing by Tuning Electronic Defects in the Heterointerface.
Li, Jun; Wang, Chaofeng; Wu, Shuilin; Cui, Zhenduo; Zheng, Yufeng; Li, Zhaoyang; Jiang, Hui; Zhu, Shengli; Liu, Xiangmei.
  • Li J; School of Health Science & Biomedical Engineering, Hebei University of Technology, Xiping Avenue 5340, Beichen District, Tianjin, 300401, P. R. China.
  • Wang C; 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, P. R. China.
  • Wu S; Biomedical Materials Engineering Research Center, Hubei Key Laboratory of Polymer Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science and Engineering, Hubei University, Wuhan, 430062, P. R. China.
  • Cui Z; School of Materials Science & Engineering, Peking University, Beijing, 100871, P. R. China.
  • Zheng Y; School of Health Science & Biomedical Engineering, Hebei University of Technology, Xiping Avenue 5340, Beichen District, Tianjin, 300401, P. R. China.
  • Li Z; Biomedical Materials Engineering Research Center, Hubei Key Laboratory of Polymer Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science and Engineering, Hubei University, Wuhan, 430062, P. R. China.
  • Jiang H; School of Materials Science & Engineering, Peking University, Beijing, 100871, P. R. China.
  • Zhu S; 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, P. R. China.
  • Liu X; School of Materials Science & Engineering, Peking University, Beijing, 100871, P. R. China.
Adv Mater ; 35(22): e2300380, 2023 Jun.
Article in English | MEDLINE | ID: covidwho-2268716
ABSTRACT
Currently, the global COVID-19 pandemic has significantly increased the public attention toward the spread of pathogenic viruses and bacteria on various high-frequency touch surfaces. Developing a self-disinfecting coating on a touchscreen is an urgent and meaningful task. Superlattice materials are among the most promising photocatalysts owing to their efficient charge transfer in abundant heterointerfaces. However, excess electronic defects at the heterointerfaces result in the loss of substantial amounts of photogenerated charge carrier. In this study, a ZnOFe2 O3 superlattice nanofilm is designed via atomic layer deposition for photocatalytic bactericidal and virucidal touchscreen. Additionally, electronic defects in the superlattice heterointerface are engineered. Photogenerated electrons and holes will be rapidly separated and transferred into ZnO and Fe2 O3 across the heterointerfaces owing to the formation of ZnO, FeO, and ZnFe covalent bonds at the heterointerfaces, where ZnO and Fe2 O3 function as electronic donors and receptors, respectively. The high generation capacity of reactive oxygen species results in a high antibacterial and antiviral efficacy (>90%) even against drug-resistant bacteria and H1N1 viruses under simulated solar or low-power LED light irradiation. Meanwhile, this superlattice nanofilm on a touchscreen shows excellent light transmission (>90%), abrasion resistance (106 times the round-trip friction), and biocompatibility.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Nanostructures Language: English Journal: Adv Mater Journal subject: Biophysics / Chemistry Year: 2023 Document Type: Article

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Nanostructures Language: English Journal: Adv Mater Journal subject: Biophysics / Chemistry Year: 2023 Document Type: Article