Cho Kyung Hee, Jang Jyongsik, Lee Jun Seop
School of Chemical and Biological Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea.
Department of Materials Science and Engineering, Gachon University, 1342 Seongnam-Daero, Sujeong-Gu, Seongnam-Si, Gyeonggi-Do 13120, Republic of Korea.
ACS Omega. 2020 Feb 5;5(6):2992-2999. doi: 10.1021/acsomega.9b03947. eCollection 2020 Feb 18.
Investment in wearable monitoring systems is increasing rapidly for realizing their practical applications, for example, in medical treatment, sports, and security systems. However, existing wearable monitoring systems are designed to measure a real-time physical signal and abnormal conditions rather than harmful environmental characteristics. In this study, a flexible chemical sensor electrode based on a three-dimensional conductive nanofilm (3D CNF) is fabricated via facile polymerization with temperature control. The morphology and chemical state of the 3D CNF are modified via electrochemical doping control to increase the carrier mobility and the active surface area of the sensor electrode. The sensor electrode is highly sensitive (up to 1 ppb), selective, and stable for an analyte (NH) at room temperature owing to the three-dimensional morphology of polypyrrole and the oxidation-level control.
为实现可穿戴监测系统的实际应用，例如在医疗、体育和安全系统中的应用，对其投资正在迅速增加。然而，现有的可穿戴监测系统旨在测量实时物理信号和异常状况，而非有害环境特征。在本研究中，通过具有温度控制的简便聚合方法制备了基于三维导电纳米膜（3D CNF）的柔性化学传感器电极。通过电化学掺杂控制对3D CNF的形态和化学状态进行修饰，以提高传感器电极的载流子迁移率和活性表面积。由于聚吡咯的三维形态和氧化水平控制，该传感器电极在室温下对分析物（NH）具有高灵敏度（高达1 ppb）、选择性和稳定性。
