ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, University of Wollongong, Wollongong, NSW 2522, Australia.
Department of Chemistry, Faculty of Science, Thi-Qar University, Thi-Qar, 64001, Iraq.
Sensors (Basel). 2017 Apr 18;17(4):884. doi: 10.3390/s17040884.
The demands for electrochemical sensor materials with high strength and durability in physiological conditions continue to grow and novel approaches are being enabled by the advent of new electromaterials and novel fabrication technologies. Herein, we demonstrate a probe-style electrochemical sensor using highly flexible and conductive multi-walled carbon nanotubes (MWNT) yarns. The MWNT yarn-based sensors can be fabricated onto micro Pt-wire with a controlled diameter varying from 100 to 300 µm, and then further modified with Nafion via a dip-coating approach. The fabricated micro-sized sensors were characterized by electron microscopy, Raman, FTIR, electrical, and electrochemical measurements. For the first time, the MWNT/Nafion yarn-based probe sensors have been assembled and assessed for high-performance dopamine sensing, showing a significant improvement in both sensitivity and selectivity in dopamine detection in presence of ascorbic acid and uric acid. It offers the potential to be further developed as implantable probe sensors.
在生理条件下，对高强度和耐用的电化学传感器材料的需求不断增长，新的电材料和新型制造技术的出现为这一需求提供了新的方法。本文展示了一种使用高柔性和导电多壁碳纳米管（MWNT）纱线的探针式电化学传感器。MWNT 纱线基传感器可以通过控制直径从 100 到 300 µm 的微 Pt 线制造，并通过浸涂法进一步用 Nafion 进行修饰。通过电子显微镜、拉曼、FTIR、电学和电化学测量对制造的微尺寸传感器进行了表征。首次将 MWNT/Nafion 纱线基探针传感器组装并评估了其用于高性能多巴胺传感的性能，在存在抗坏血酸和尿酸的情况下，在多巴胺检测方面表现出了显著的灵敏度和选择性的提高。它有望进一步开发为可植入式探针传感器。
