An optical fiber integrated optoelectrode for the photoelectrochemical detection

Pingping Teng, Xingyue Wen, Zhihai Liu, Jianzhong Zhang, Yu Zhang, Nigel Copner, Jun Yang, Kang Li, Mark Bowkett, Danheng Gao, Libo Yuan, Xiaoliang Zhu

Research output: Contribution to journalArticlepeer-review


A novel optical fiber integrated optoelectrode was proposed and miniatured photoelectrochemical (PEC) sensor was realized. In the structure, transparent conductive oxide indium-tin-oxide (ITO) film and photocatalytic material are coated outside of one end of the optical fiber. This tiny optoelectrode first simultaneously realizes the light-guiding ability and the microelectrode function of electroanalysis. Specifically, the detection of trace nitrite is realized by PEC process of the optical fiber/ITO/BiOI optoelectrode. The integrated optoelectrode shows remarkable electrochemical performance, and the sensor has notable PEC detection ability. At the optimal photosensitizer concentration, the optoelectrode sensor has a linear range of 1 nM–1 M and a low detection limit of 5 10−10 M for the nitrite sensing. Due to the advantages of integration, fast detection, high sensitivity, and simple operation, the proposed optoelectrode has great potentials in a variety of fields, such as all-fiber integrated devices and various biochemical microanalyses systems.
Original languageEnglish
Article number127436
Number of pages7
JournalOptics Communications
Early online date3 Sept 2021
Publication statusPublished - 1 Jan 2022


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