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.
| Original language | English |
|---|---|
| Pages (from-to) | 408-414 |
| Number of pages | 7 |
| Journal | Sensors and Actuators B: Chemical |
| Volume | 286 |
| Early online date | 30 Jan 2019 |
| DOIs | |
| Publication status | Published - 1 May 2019 |
Keywords
- Optical fiber sensor
- Relative humidity sensor
- Breathing monitoring
- Lossy mode resonance
- Graphene oxide
- Layer-by-layer
Profiles
-
Andrew Mayes
- School of Chemistry, Pharmacy and Pharmacology - Emeritus Professor
- Chemistry of Materials and Catalysis - Member
Person: Honorary, Research Group Member
-
Sonia Melendi-Espina
- School of Engineering, Mathematics and Physics - Associate Professor in Energy and Environmental Engineering
- Materials, Manufacturing & Process Modelling - Member
- Sustainable Energy - Member
Person: Research Group Member, Academic, Teaching & Research