A graphene/gold-coated surface plasmon sensor for sodium nitrate detection
Document Type
Article
Publication Date
8-1-2022
Abstract
A sodium nitrate sensor with graphene/gold coating is presented in this paper. A Kretschmann setup with angle interrogation was used to detect sodium nitrate in the range of 0-15%. Using a graphene coating on top of the 50 nm gold layer showed an improvement in the sensitivity of the sensor. The gold-coated setups had a sensitivity of 0.198 degrees/%. In contrast, the graphene/gold-coated samples showed a sensitivity of 0.244 degrees/% due to the charge transfer between the graphene and the gold and the resulting excited solid electric field. The graphene/gold-coated sensor showed good stability with time in the temperature range of 19-34 degrees C. This shows that this setup may be beneficial in detecting sodium nitrate.
Keywords
Sensors, Surface plasmon resonance, Graphene, Sodium nitrate
Divisions
fac_eng
Funders
INTI IU SEEDING GRANT 2022 [INTIFEQS-01-11-2022]
Publication Title
Photonics
Volume
9
Issue
8
Publisher
MDPI
Publisher Location
ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND