Integrated fiber-based optoelectrode for electrochemiluminescence sensing

Pingping Teng, Zhanao Li, Zhihai Liu, Jianzhong Zhang, Nigel Copner, Jun Yang, Kang Li, Mark Bowkett, Danheng Gao, Libo Yuan

Research output: Contribution to journalArticlepeer-review


An optical fiber-indium tin oxide (ITO) optoelectrode was proposed and first demonstrated in electrochemical luminescence (ECL) analyze. A transparent conductive ITO film was coated onto the surface of a bare optical fiber by magnetron sputtering. The optical fiber was realized as a working electrode and a detection device at the same time. Notably, the photoelectric analysis is integrated into the optical fiber electrode, providing more information about the analyte while greatly simplifying the device. The modulation of the ECL response intensity is monitored in real-time by applying different voltages to the fiber optic electrode with a response time of 2 s. In aqueous solutions, trace amount of O2 can be detected in real-time by the optical fiber ECL system. A wide detection range of 1 × 10−5 M to 1 × 10−2 M is obtained. Especially, the optical fiber-ITO electrode has great potentials in environmental analysis and bioassay.
Original languageEnglish
Article number127633
Number of pages6
JournalOptics Communications
Early online date16 Dec 2021
Publication statusPublished - 1 Apr 2022


  • optoelectrode
  • integrated optical fibre
  • Electrochemiluminescence
  • ITO


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