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 2.478×10−102.478\times 10^{-10} with a regression coefficient of R2 = 0.9647. Further, concentration effect was accomplished in the linear range 0.4 μ0.4~\mu M to 60 μ60~\mu M. The limit of detection was obtained as 0.416 μ0.416~\mu 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.

中文翻译：

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带有螺纹电极的电化学微型平台，用于无干扰砷检测


在此，展示了一种完全集成的基于线/纺织品的电化学传感装置。使用通过电沉积工艺用金纳米粒子进行化学修饰的亲水性导电碳线作为工作电极（WE）。涂有Ag/AgCl的亲水线和未修饰的裸露亲水线分别用作参比电极(RE)和对电极(CE)。该装置由毛细管支撑的亲水性导电碳线制成，这些集成电极被放置在 2 mL 玻璃瓶中。使用SEM（扫描电子显微镜）和X射线光电子能谱（XPS）对工作电极进行物理化学表征。此外，还对所制作的传感平台进行了砷电化学传感测试。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。获得了对应于砷的氧化的-0.4V处的氧化峰。使用CV分析进行扫描速率效应，发现扩散系数为2.478×10−102.478\times 10^{-10}，回归系数为R2 = 0.9647。此外，浓度效应在0.4μ0.4~μM至60μ60~μM的线性范围内实现，检测限为0.416μ0.416~μM。对于实际应用，干扰的影响对其他化学品和自来水和血清样品的实际样品进行分析，得到了显着的回收率。