A graphene/gold-coated surface plasmon sensor for sodium nitrate detection

Zain, Huda Adnan and Batumalay, Malathy and Harith, Z. and Rahim, Hazli Rafis Abdul and Harun, Sulaiman Wadi (2022) A graphene/gold-coated surface plasmon sensor for sodium nitrate detection. Photonics, 9 (8). ISSN 2304-6732, DOI https://doi.org/10.3390/photonics9080588.

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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.

Item Type: Article
Funders: INTI IU SEEDING GRANT 2022 [INTIFEQS-01-11-2022]
Uncontrolled Keywords: Sensors; Surface plasmon resonance; Graphene; Sodium nitrate
Subjects: Q Science > QC Physics
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 21 Sep 2023 10:18
Last Modified: 21 Sep 2023 10:18
URI: http://eprints.um.edu.my/id/eprint/41409

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