光电流
异质结
极性(国际关系)
材料科学
光电子学
检出限
信号(编程语言)
基质(水族馆)
分析物
纳米技术
化学
计算机科学
物理化学
程序设计语言
细胞
地质学
海洋学
生物化学
色谱法
作者
Fang-Fang Xin,Jinjin Xu,Jin Zhang,Aijun Wang,Yadong Xue,Li-Ping Mei,Pei Song,Jiu‐Ju Feng
标识
DOI:10.1016/j.bios.2023.115442
摘要
The controllable modulation of the response mode is highly attractive for the construction of photoelectrochemical (PEC) sensors with improved sensitivity and anti-interference ability in complex real samples matrix. Here, we present a charming proof-of-concept ratiometric PEC aptasensor of enrofloxacin (ENR) analysis via the controllable signal transduction. Different with the traditional sensing mechanism, this ratiometric PEC aptasensor integrates the anodic PEC signal induced by PtCuCo nanozyme-catalyzed precipitation reaction and the polarity-switching cathodic PEC response mediated by Cu2O nanocubes on S-scheme [email protected]2S4 heterostructure. Taking advantages of the photocurrent-polarity-switching signal response model and the superior performance of the photoactive substrate material, the proposed ratiometric PEC aptasensor displays a good detection linear range for ENR analysis from 0.01 pg mL−1 to 10 ng mL−1, with a detection limit of 3.3 fg mL−1. This study provides a general platform for detecting interested trace analytes in real samples and expands the diversity of sensing strategy design.
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