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Sensors 2017, 17(4), 884; doi:10.3390/s17040884

Probe Sensor Using Nanostructured Multi-Walled Carbon Nanotube Yarn for Selective and Sensitive Detection of Dopamine

1
ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, University of Wollongong, Wollongong, NSW 2522, Australia
2
Department of Chemistry, Faculty of Science, Thi-Qar University, Thi-Qar, 64001, Iraq
3
Centre for Translational Neuroscience, IHMRI, School of Health Sciences, University of Wollongong, Wollongong, NSW 2522, Australia
4
The Alan G.MacDiarmid NanoTech Institute and Department of Chemistry, University of Texas at Dallas, Richardson, TX 75083, USA
*
Authors to whom correspondence should be addressed.
Academic Editor: Yong Liu
Received: 17 March 2017 / Revised: 11 April 2017 / Accepted: 12 April 2017 / Published: 18 April 2017
(This article belongs to the Special Issue Whole Cell-Based Biosensors and Application)
View Full-Text   |   Download PDF [3901 KB, uploaded 18 April 2017]   |  

Abstract

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. View Full-Text
Keywords: probe sensor; multi-walled carbon nanotubes; nano yarn; dopamine detection; Nafion coating probe sensor; multi-walled carbon nanotubes; nano yarn; dopamine detection; Nafion coating
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MDPI and ACS Style

Al-Graiti, W.; Yue, Z.; Foroughi, J.; Huang, X.-F.; Wallace, G.; Baughman, R.; Chen, J. Probe Sensor Using Nanostructured Multi-Walled Carbon Nanotube Yarn for Selective and Sensitive Detection of Dopamine. Sensors 2017, 17, 884.

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