Tailored ionically conductive graphene oxide-encased metal ions for ultrasensitive cadaverine sensor  

作　　者：Ying Chen Li Li Junyao Zhang Tongrui Sun Xuan Zhang Shiqi Zhang Jia Huang Yidong Zou 

机构地区：[1]School of Materials Science and Engineering,Tongji University,Shanghai 201804,China [2]Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation,Translational Research Institute of Brain and Brain-Like Intelligence,Shanghai Fourth People’s Hospital Affiliated to Tongji University,Tongji University,Shanghai 200434,China [3]School of Mechanical Engineering,Nantong University,Nantong 226019,China

出　　处：《Chinese Chemical Letters》2024年第8期508-513,共6页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.62074111,22105043);the Science&Technology Foundation of Shanghai(Nos.19JC1412402,20JC1415600);Shanghai Municipal Science and Technology Major Project(No.2021SHZDZX0100);Shanghai Municipal Commission of Science and Technology Project(No.19511132101);the support of the Fundamental Research Funds for the Central Universities

摘　　要：Intelligent chemical sensors have been extensively used in food safety and environmental assessment,while limited sensitivity and homogeneity bring about huge obstacles to their practical application.Herein,novel ionically conductive sensitive materials were elaborately designed based on metal ion decorated graphene oxide(GO)via a facile and general in-situ spin-coating strategy,where the abundant functional groups(-OH and-COOH)of GO layer could provide natural binding sites for various bivalent metal cations(such as Cu^(2+),Ni^(2+),Zn^(2+),Co^(2+),and Mg^(2+))through coordination and electrostatic inter-action.The intercalated metal cations on the layered GO nanosheets can be regarded as charge carriers and complexation with targeted gas(cadaverine,Cad),which is a typical metabolites production and food degradants.By contrast,the designed GO@Cu(Ⅱ)sensor exhibited the optimal sensing performance toward Cad molecules at room temperature,including ultra-low detection limit(ca.3 nL),excellent sensitivity,and rapid low concentration detection rate(only 16 s).Interestingly,the sensor exhibited an irreversible and specific response toward Cad,while it showed a transient and reversible response to other interfering gases,implying its outstanding selectivity.In addition,the GO@Cu(Ⅱ)sensor enabled real-time monitoring of the decay progression of cheese,and it exhibited great potential for large-scale production via its excellent homogeneity.It provides an efficient approach to tailoring intelligent chemical sensors for real-time food safety monitoring and human health warning.

关 键 词：Graphene oxide Cadaverine monitoring Chemical sensor Ionically conductive HOMOGENEITY 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TB34[自动化与计算机技术—控制科学与工程]