Dual near-infrared AgInS_(2)and CuInS_(2)co-sensitized ZnO photoelectrode array enabled paper-based ratiometric photoelectrochemical aptasensing  

作　　者：Hong-Mei Yang Chuan-Yi Tu Yi-Lin Zhuang Yu-Heng Li Yu-Xin Hao Qiu-Yi Li Li-Na Zhang Jing-Hua Yu Yan Zhang 

机构地区：[1]School of Chemistry and Chemical Engineering,University of Jinan,Jinan,250022,China [2]Zhang Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials,University of Jinan,Jinan,250022,China

出　　处：《Rare Metals》2024年第12期6525-6536,共12页稀有金属(英文版)

基　　金：financially supported by the National Natural Science Foundation of China(No.22306070);Shandong Provincial Natural Science Foundation(No.ZR2023QB002);the Science and Technology Program of University of Jinan(No.XKY2203);the National Undergraduate Innovation and Entrepreneurship Training Program(Nos.202210427008 and 202210427005);the Postdoctoral Science Foundation of University of Jinan(No.XBH2208);Taishan Scholars Program(No.tsqn202103082);the Excellent Youth Innovation Team in Universities of Shandong(No.2021KJ021);China Postdoctoral Science Foundation(No.2023M731302)。

摘　　要：Herein,a dual near-infrared(NIR)-response AgInS_(2)and CuInS_(2)co-sensitized ZnO photoelectrode array consisting of two spatial-resolved paper working electrodes(PWE1and PWE2)was established to enable paper-based ratiometric photoelec trochemical(PEC)aptasensing of Di(2-ethylhexyl)phthalate(DEHP)based on triple-helix molecular switch(THMS)-mediated"on-off"switching of co-sensitization effect.Profiting from the cosensitization of AgInS_(2)and CuInS_(2)on paper-based ZnO,the dual NIR-response cascade sensitization structure of AgInS_(2)/CuInS_(2)/ZnO exhibited a wide light response range and high charge separation efficiency,giving a"switch on"state of co-sensitization effect with markedly high photocurrent response.The"switch off"state of the co-sensitization effect was made by RecJf exonuclease-assisted target recycling-induced conformation change of THMS,which caused the detachment of AgInS_(2)quantum dots from the aptasensing interface,leading to a significantly decreased photocurrent signal.Accordingly,the constant I_(1)of PWE_(1)and varying I_(2)of PWE_(2)were collected based on the incubation of constant concentration of DEHP on PWE1and various concentrations of DEHP on PWE_(2).The ultrasensitive detection of DEHP was realized by calculating the ratio of I_(2)/I_(1).This work brought new insights into the establishment of a high-performance paper-based ratiometric PEC aptasensing platform for highly sensitive quantification of DEHP.

关 键 词：NIR-response AgInS_(2)/CuInS_(2)/ZnO Co-sensitization PHOTOELECTROCHEMICAL Di(2-ethylhexyl)phthalate 

分 类 号：TU9[建筑科学]