University of Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, ENSCBP, 33607 Pessac, France.
Anal Chem. 2022 Oct 18;94(41):14317-14321. doi: 10.1021/acs.analchem.2c02872. Epub 2022 Oct 3.
Bipolar electrochemistry (BE) is a wireless electrochemical technique, which enables asymmetric electroactivity on the surface of conducting objects. This technique has been extensively studied for different electrochemical applications, including synthesis, separation, sensing, and surface modification. Here, we employ BE for imaging the transient electrochemical activity of different redox species with high accuracy via an array of light-emitting diodes having different lengths. Such a gradient allows the differentiation of redox systems due to their intrinsic difference in thermodynamic potential and the evaluation of their diffusional behavior based on the intensity of light emission. The result is an instantaneous optical readout of analytical information, equivalent to classic electrochemical scanning techniques, such as linear sweep voltammetry.
双极电化学（BE）是一种无线电化学技术，可实现导电物体表面的不对称电活性。该技术已广泛应用于不同的电化学应用，包括合成、分离、传感和表面修饰。在这里，我们通过具有不同长度的发光二极管阵列，利用 BE 以高精度对不同氧化还原物种的瞬态电化学活性进行成像。这种梯度允许由于热力学势的固有差异而区分氧化还原体系，并基于光发射强度评估它们的扩散行为。结果是即时光学读取分析信息，等效于经典的电化学扫描技术，如线性扫描伏安法。
