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A Quantitative Bacteria Monitoring and Killing Platform Based on Electron Transfer from Bacteria to a Semiconductor
Wang, GM; Tang, KW; Meng, ZY; Liu, P; Mo, S; Mehrjou, B; Wang, HY; Liu, XY; Wu, ZW; Chu, PK
2020-10-01
Source PublicationADVANCED MATERIALS
ISSN0935-9648
Issue39
SubtypeArticle
AbstractA platform with both bacteria killing and sensing capabilities is crucial for monitoring the entire bacteria-related process on biomaterials and biomedical devices. Electron transfer (ET) between the bacteria and a Au-loaded semiconductor (ZnO) is observed to be the primary factor for effective bacteria sensing and fast bacteria killing. The electrons produce a saturation current that varies linearly with the bacteria number, semi-logarithmically, withR(2)of 0.98825, thus providing an excellent tool to count bacteria quantitatively in real-time. Furthermore, ET leads to continuous electron loss killing of about 80% ofEscherichia coliin only 1 h without light. The modularity and extendability of this ET-based platform are also demonstrated by the excellent results obtained from other semiconductor/substrate systems and the stability is confirmed by recycling tests. The underlying mechanism for the dual functions is not due to conventional attributed Zn(2+)leaching or photocatalysis but instead electrical interactions upon direct contact. The results reveal the capability of real-time detection of bacteria based on ET while providing information about the antibacterial behavior of ZnO-based materials especially in the early stage. The concept can be readily incorporated into the design of smart and miniaturized devices that can sense and kill bacteria simultaneously.
DOI10.1002/adma.202003616
WOS KeywordANTIBACTERIAL ACTIVITY ; CELL-DEATH ; ZNO ; NANOPARTICLES ; GRAPHENE ; NANOMATERIALS ; BIOSENSORS ; MECHANISM ; SILVER ; LIGHT
Language英语
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27823
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Wang, GM,Tang, KW,Meng, ZY,et al. A Quantitative Bacteria Monitoring and Killing Platform Based on Electron Transfer from Bacteria to a Semiconductor[J]. ADVANCED MATERIALS,2020(39).
APA Wang, GM.,Tang, KW.,Meng, ZY.,Liu, P.,Mo, S.,...&Chu, PK.(2020).A Quantitative Bacteria Monitoring and Killing Platform Based on Electron Transfer from Bacteria to a Semiconductor.ADVANCED MATERIALS(39).
MLA Wang, GM,et al."A Quantitative Bacteria Monitoring and Killing Platform Based on Electron Transfer from Bacteria to a Semiconductor".ADVANCED MATERIALS .39(2020).
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