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介绍 /Introduction

研究图文/Introduction

Scheme 1. Principle of the Fully Split-Type PEC Aptasensor


Figure 1. Morphology and structure characteristics. TEM images of (A) UiO-66, (B) UiO-66-TCPP, and (C) MP-UiO-66-TCPP and (D) EDS of it. The high-resolution XPS spectra of (E) Zr 3d, (F) O 1s, and (G) P 2p for MP-UiO-66-TCPP. (H) XRD pattern of as-prepared samples.


Figure 2. (A) Photocurrent responses of different electrodes in Tris-HCl (0.1 M, pH 7.4) containing 0.1 M AA, (B) photocurrent responses with different targets in Tris-HCl (0.1 M, pH 7.4) containing 0.1 M AA (target concentration: 100 pM), (C) PAGE characterization of the target recognition process, and (D) fluorescence characterization of the site-occupying effect.





结论 /Conclusion
本研究提出了一种创新的全分离式光电化学适配体传感器,用于环境样本中快速、超灵敏且无背景干扰的多靶点检测。该系统将目标识别、信号分子解离和光电化学读出模块化为三个独立单元:DNA逻辑门实现了特定且可编程的多靶点识别,磷酸盐诱导的金属有机框架解离充当通用的光电电子标签,裸电极则作为通用的信号读出平台。通过将检测的“智能”核心完全限制在均相中运行,传感过程避开了复杂的电极功能化步骤。这种设计不仅简化了传感器的制造,缩短了检测时间,还解决了固定探针系统中常见的空间位阻、生物分子失活和信号串扰等问题。值得注意的是,该平台能够独立识别和同时检测多靶点,无需针对特定目标的输出模块、定制的识别界面或外部参数调整。其在便携式工作站上的成功运行证实了其实用性,为新型生物测定设计提供了框架,并有助于开发用于现场环境监测、农业污染物筛查和生物医学废水分析的便携式设备。
文献直通车 /Literature information
A Fully Split-Type PEC Sensing Driven by Orthogonal DNA Nanoprobes and Phosphate-Induced Site-Occupation Effect for Multiplexed DetectionJiaxin Guo, Shuting Wang, Gaiping Li, Baoxian Ye, Shusheng Zhang,* and Lina Zou*原文链接:https://doi.org/10.1021/acs.analchem.6c00213
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