Electrolyte-gated SrCoO_(x) FET sensor for highly sensitive detecting pH in extreme alkalinity solution

查看全文 作　　者：Han [1]Zhou;Gaocan [1]Qi;Wenbin [1]Li;Yuhang [1]Wang;Zhihao [1]Yuan

机构地区：[1]School of Materials Science and Engineering,Tianjin Key Lab of Photoelectric Materials&Devices,and Key Laboratory of Display Materials and Photoelectric Devices(Ministry of Education),Tianjin University of Technology,Tianjin 300384,China

出　　处：《Nano Research》索引2024年第17卷第4期,共8页

基　　金：supported by the National Nature Science Foundation of China(No.21501132);the Natural Science Foundation of Tianjin City(No.20JCZDJC00280);the National Key R&D Program of China(No.2017YFA0700104). 摘　　要：The pH monitoring is significantly important in chemical industry,biological process,and pollution treatment.However,it remains a great challenge to measure pH in extreme alkalinity conditions.Herein,we employ an electrolyte-gated field-effect-transistor(FET)strategy using non-stoichiometric SrCoO_(x) with rich oxygen-vacancy defects as channel materials for detecting extreme alkalinity.The corresponding channel can provide effective oxygen-ion-migration sites for reversible transformation of OH-↔O_(2)-+H^(+)driven by electric field.The resultant electrolyte-gated FET sensor exhibits a sensitive linear response to high concentrations of alkaline solution,1–20 M.Significantly,the sensor has the ability to directly indicate the pH values ranging from 14.0 to 17.0 in consideration of ion-activity coefficient data.This work offers a great possibility for directly detecting base concentration as well as pH values in extreme alkaline solutions. 关键词：field-effect-transistor(FET) pH sensor extreme alkaline solution SrCoO_(x) oxygen-ion migration

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Electrolyte-gated SrCoO_(x) FET sensor for highly sensitive detecting pH in extreme alkalinity solution

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