IEEE Trans Nanobioscience. 2022 Jan;21(1):117-124. doi: 10.1109/TNB.2021.3098035. Epub 2021 Dec 30.
Herein, a fully integrated thread/textile-based electrochemical sensing device has been demonstrated. A hydrophilic conductive carbon thread, chemically modified with gold nanoparticles through an electrodeposition process, was used as a working electrode (WE). The hydrophilic thread coated with Ag/AgCl and an unmodified bare hydrophilic thread were used as reference electrode (RE) and counter electrode (CE) respectively. The device was fabricated with hydrophilic conductive carbon threads supported by capillary tubes and these integrated electrodes were placed in a 2 mL glass vial. The physico-chemical characterization of the working electrode was carried out using SEM (scanning electron microscopy) and X-ray photoelectron spectroscopy (XPS). Furthermore, the fabricated sensing platform, was tested for electrochemical sensing of arsenic. The electrocatalytic oxidation activity of arsenic in the designed platform was investigated via cyclic voltammetry (CV) and square wave Voltammetry (SWV). An oxidation peak at -0.4 V corresponding to the oxidation of arsenic was obtained. Scan rate effect was performed using CV analysis and the diffusion coefficient was found to be 2.478×10 with a regression coefficient of R = 0.9647. Further, concentration effect was accomplished in the linear range 0.4 μ M to 60 μ M. The limit of detection was obtained as 0.416 μ M. For the practical application, effect of interference from other chemicals and real sample analysis from the tap water and blood serum sample was carried out which gave remarkable recovery values.
本文展示了一种完全集成的基于线/织物的电化学传感装置。使用经过化学修饰的亲水导电碳纤维线作为工作电极（WE），通过电沉积过程在其上修饰金纳米粒子。亲水性线涂有 Ag/AgCl，而未修饰的裸亲水性线则用作参比电极（RE）和对电极（CE）。该装置由毛细管支撑的亲水导电碳纤维线制成，这些集成电极被放置在 2 mL 玻璃小瓶中。通过扫描电子显微镜（SEM）和 X 射线光电子能谱（XPS）对工作电极的物理化学特性进行了表征。此外，还测试了所构建的传感平台对砷的电化学传感性能。通过循环伏安法（CV）和方波伏安法（SWV）研究了设计平台中砷的电催化氧化活性。在-0.4 V 处获得了对应于砷氧化的氧化峰。通过 CV 分析进行了扫速效应研究，发现扩散系数为 2.478×10，回归系数 R = 0.9647。进一步，在 0.4 μM 至 60 μM 的线性范围内完成了浓度效应。检测限为 0.416 μM。为了实际应用，还进行了来自自来水和血清样本的其他化学物质干扰和实际样本分析的影响，结果显示出了显著的回收率。
