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Sensors 2018, 18(1), 58; https://doi.org/10.3390/s18010058

Graphene Oxide in Lossy Mode Resonance-Based Optical Fiber Sensors for Ethanol Detection

1
School of Chemistry, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
2
Engineering Division, School of Mathematics, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
*
Authors to whom correspondence should be addressed.
Received: 11 December 2017 / Revised: 16 December 2017 / Accepted: 22 December 2017 / Published: 27 December 2017
(This article belongs to the Special Issue Optical Fiber Sensors 2017)
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Abstract

The influence of graphene oxide (GO) over the features of an optical fiber ethanol sensor based on lossy mode resonances (LMR) has been studied in this work. Four different sensors were built with this aim, each comprising a multimode optical fiber core fragment coated with a SnO2 thin film. Layer by layer (LbL) coatings made of 1, 2 and 4 bilayers of polyethyleneimine (PEI) and graphene oxide were deposited onto three of these devices and their behavior as aqueous ethanol sensors was characterized and compared with the sensor without GO. The sensors with GO showed much better performance with a maximum sensitivity enhancement of 176% with respect to the sensor without GO. To our knowledge, this is the first time that GO has been used to make an optical fiber sensor based on LMR. View Full-Text
Keywords: optical fiber sensor; ethanol sensor; lossy mode resonances; graphene oxide; layer-by-layer optical fiber sensor; ethanol sensor; lossy mode resonances; graphene oxide; layer-by-layer
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Hernaez, M.; Mayes, A.G.; Melendi-Espina, S. Graphene Oxide in Lossy Mode Resonance-Based Optical Fiber Sensors for Ethanol Detection. Sensors 2018, 18, 58.

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