Nitrogen-doped carbon coated TiC nanofiber arrays deposited on Ti-6Al-4V for selective and sensitive electrochemical detection of dopamine

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • Xia Zhao
  • Zanling Huang
  • Wanying Zhang
  • Yuting Ke
  • Fushen Lu
  • Rongsheng Chen
  • Kaifu Huo
  • Liangsheng Hu

Detail(s)

Original languageEnglish
Article number126266
Number of pages8
Journal / PublicationSurface and Coatings Technology
Volume402
Online published5 Aug 2020
Publication statusPublished - 25 Nov 2020

Abstract

Core-shell titanium carbide/carbon (TiC@C) and titanium carbide/nitrogen-doped carbon (TiC@CNx) quasi-aligned nanofiber arrays (NFAs) are fabricated on biomedical Ti-6Al-4V by a simple thermal chemical process in the presence of benzene and pyridine at 800 °C, respectively. The morphology, structure, and composition of the TiC@C and TiC@CNx NFAs are characterized by X-ray diffraction, electron microscopy, energy-dispersive X-ray spectrometry, and Raman scattering spectroscopy. The TiC@C and TiC@CNx nanofibers consisting of highly conducting single-crystalline TiC cores and carbon shells or N-doped carbon shells have a large amount of defects and N doping endows the TiC@CNx NFAs with excellent electrochemical properties. The TiC@CNx NFAs electrode exhibits fast heterogeneous electron transfer (HET) kinetics in the Fe(CN)63−/4− redox couple showing an ideal peak-to-peak potential separation (59 mV) at a high scan rate of 7000 mV s−1. As a result, the TiC@CNx NFAs electrode has high activity in the simultaneous detection of dopamine (DA), ascorbic acid (AA), uric acid (UA), and serotonin (5-hydroxytryptamine, 5-HT) as well as high sensitivity and selectivity in the determination of DA in the presence of UA, AA, and 5-HT. The linear range for the determination of DA is 0.5–180 μM and detection limit is 8 nM (S/N = 3).

Research Area(s)

  • Ascorbic acid, Dopamine, Electrochemical detection, Nitrogen-doped carbon, Serotonin, Uric acid

Citation Format(s)

Nitrogen-doped carbon coated TiC nanofiber arrays deposited on Ti-6Al-4V for selective and sensitive electrochemical detection of dopamine. / Zhao, Xia; Huang, Zanling; Zhang, Wanying; Ke, Yuting; Lu, Fushen; Chen, Rongsheng; Huo, Kaifu; Hu, Liangsheng; Chu, Paul K.

In: Surface and Coatings Technology, Vol. 402, 126266, 25.11.2020.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal