Ultrasensitive LPFG Corrosion Sensor with Fe-C Coating Electroplated on a Gr/AgNW Film
This paper presents the first report on an ultrasensitive Fe-C coated long period fiber gratings (LPFG) corrosion sensor with graphene (Gr) and silver nanowire (AgNW) composite as a conductive film for Fe-C electroplating. The Gr/AgNW composite was grown on copper foil, wet transferred and adhered to the curve surface of the fiber optic sensor under atmospheric pressure and heating conditions. For comparison, another Fe-C coated LPFG sensor was prepared with silver nano ink as a conductive film. Both sensors were tested for 72 h in 3.5 wt.% NaCl solution with simultaneous measurements of transmission spectrum and electrochemical impedance spectroscopy. Due to its high optical transparency, the Gr/AgNW composite increased the wavelength sensitivity and service life of a Fe-C coated LPFG sensor by over 90% and 110%, respectively. The effective depth of influence to the evanescent field surrounding the LPFG sensor was 23.6 µm with the silver film and greater than 30 µm with the Gr/AgNW film.
C. Guo et al., "Ultrasensitive LPFG Corrosion Sensor with Fe-C Coating Electroplated on a Gr/AgNW Film," Sensors and Actuators, B: Chemical, pp. 334-342, Elsevier B.V., Mar 2019.
The definitive version is available at https://doi.org/10.1016/j.snb.2018.12.059
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Corrosion sensor; Fe-C coating; Graphene; Long period fiber gratings; Silver nanowire
International Standard Serial Number (ISSN)
Article - Journal
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