首页|Electrolyte-gated SrCoOx FET sensor for highly sensitive detecting pH in extreme alkalinity solution

Electrolyte-gated SrCoOx FET sensor for highly sensitive detecting pH in extreme alkalinity solution

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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 SrCoOx 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-(⇔)O2-+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.

field-effect-transistor(FET)pH sensorextreme alkaline solutionSrCoOxoxygen-ion migration

Han Zhou、Gaocan Qi、Wenbin Li、Yuhang Wang、Zhihao Yuan

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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

National Nature Science Foundation of ChinaNatural Science Foundation of Tianjin CityNational Key R&D Program of China

2150113220JCZDJC002802017YFA0700104

2024

10.1007/s12274-023-6148-2

纳米研究(英文版)

纳米研究(英文版)

CSTPCD
ISSN：
年,卷(期)：2024.17(4)
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