Dual near-infrared AgInS2 and CuInS2 co-sensitized ZnO photoelectrode array enabled paper-based ratiometric photoelectrochemical aptasensing

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2024-07-20 DOI:10.1007/s12598-024-02874-8

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

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Abstract

Herein, a dual near-infrared (NIR)-response AgInS₂ and CuInS₂ co-sensitized ZnO photoelectrode array consisting of two spatial-resolved paper working electrodes (PWE₁ and PWE₂) was established to enable paper-based ratiometric photoelectrochemical (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 co-sensitization of AgInS₂ and CuInS₂ on paper-based ZnO, the dual NIR-response cascade sensitization structure of AgInS₂/CuInS₂/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 AgInS₂ quantum dots from the aptasensing interface, leading to a significantly decreased photocurrent signal. Accordingly, the constant I₁ of PWE₁ and varying I₂ of PWE₂ were collected based on the incubation of constant concentration of DEHP on PWE₁ and various concentrations of DEHP on PWE₂. The ultrasensitive detection of DEHP was realized by calculating the ratio of I₂/I₁. This work brought new insights into the establishment of a high-performance paper-based ratiometric PEC aptasensing platform for highly sensitive quantification of DEHP.

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AgInS2 和 CuInS2 双近红外共敏化氧化锌光电电极阵列实现了纸基比率光电化学感应

本文建立了由两个空间分辨纸质工作电极（PWE1 和 PWE2）组成的 AgInS2 和 CuInS2 双近红外（NIR）响应共敏化 ZnO 光电电极阵列，基于三重螺旋分子开关（THMS）介导的 "开关 "共敏化效应，实现了纸质邻苯二甲酸二（2-乙基己基）酯（DEHP）的比率光电化学（PEC）感应。利用 AgInS2 和 CuInS2 在纸基 ZnO 上的共敏化作用，AgInS2/CuInS2/ZnO 的双近红外响应级联敏化结构显示出宽广的光响应范围和高电荷分离效率，使共敏化效应处于 "开关 "状态，并具有明显的高光电流响应。共敏化效应的 "关闭 "状态是由 RecJf 外切酶辅助的靶再循环引起的 THMS 的构象变化造成的，这种变化导致 AgInS2 量子点从适感界面上脱离，从而导致光电流信号显著下降。因此，通过在 PWE1 上孵育恒定浓度的 DEHP 和在 PWE2 上孵育不同浓度的 DEHP，收集到了 PWE1 的恒定 I1 和 PWE2 的变化 I2。通过计算 I2/I1 的比值，实现了对 DEHP 的超灵敏检测。这项工作为建立基于纸张的高性能比率法PEC质谱传感平台实现高灵敏度的DEHP定量分析提供了新的思路。

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.