High-performance optical fiber humidity sensor based on lossy mode resonance using a nanostructured polyethylenimine and graphene oxide coating

Hernaez Saenz De Zaitigui, Miguel, Acevedo Munoz, Beatriz, Mayes, Andrew and Melendi-Espina, Sonia (2019) High-performance optical fiber humidity sensor based on lossy mode resonance using a nanostructured polyethylenimine and graphene oxide coating. Sensors and Actuators B: Chemical, 286. pp. 408-414. ISSN 0925-4005

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Abstract

In this study, a rapid optical fiber sensor for humidity with high sensitivity and wide detection range has been constructed, based on lossy mode resonance (LMR). A thin film made of alternating polyethylenimine (PEI) and graphene oxide (GO) layers was selected as sensitive coating. It was deposited on a SnO2-sputtered fiber core in a dip-assisted layer-by-layer assembly. The structure and surface chemistry of the raw materials were investigated by means of Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. Key properties such as sensitivity, linearity, hysteresis, stability and response and recovery times were characterized. The sensor exhibited excellent sensitivity, especially at high relative humidity (RH) levels, and short reaction and retrieval periods. This research provides a viable and practical way to fabricate high performance humidity optical fiber sensors with GO-based nanostructured coatings.

Item Type: Article
Uncontrolled Keywords: optical fiber sensor,relative humidity sensor,breathing monitoring,lossy mode resonance,graphene oxide,layer-by-layer
Faculty \ School: Faculty of Science > School of Mathematics
Faculty of Science > School of Chemistry
Depositing User: LivePure Connector
Date Deposited: 01 Feb 2019 15:30
Last Modified: 26 Sep 2020 23:58
URI: https://ueaeprints.uea.ac.uk/id/eprint/69808
DOI: 10.1016/j.snb.2019.01.145

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