Graphene/PVA coated D-shaped fiber for sodium nitrate sensing
| Autor: | Sulaiman Wadi Harun, Hazli Rafis Abdul Rahim, Malathy Batumalay, Huda Adnan Zain, Moh. Yasin, Zuraidah Harith |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Graphene Metals and Alloys Single-mode optical fiber engineering.material Condensed Matter Physics Polyvinyl alcohol Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Ion chemistry.chemical_compound Coating chemistry Nitrate law Sodium nitrate engineering Fiber Electrical and Electronic Engineering Composite material Instrumentation |
| Zdroj: | Sensors and Actuators A: Physical. 332:113163 |
| ISSN: | 0924-4247 |
| DOI: | 10.1016/j.sna.2021.113163 |
| Popis: | A graphene/Polyvinyl alcohol (PVA) coated D -shaped fiber structure for sensing sodium nitrate solutions is proposed in this paper. D -shaped single mode fiber (SMF) coated with graphene/PVA was used as a sensor for sodium nitrate liquid solutions with the concentration range of 1–7%. After monitoring the output power and spectral transmission characteristics of the sensor, the graphene/PVA coated sensor showed an improved performance over the uncoated structure. The evanescent mode of the side-polished fiber and the interaction between the nitrate ions and the coating graphene improved the sensor’s performance. The graphene/PVA coated sensor had sensitivity and linearity of 0.390 dBm/% and 99% compared to the uncoated sensor sensitivity and linearity of 0.117 dBm/% and 98% respectively. This shows the advantage of using D -shaped fiber coated with graphene and PVA to detect sodium nitrate concentrations. |
| Databáze: | OpenAIRE |
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