Sodium nitrate (NaNO3) sensor based on graphene coated microfiber

Yasin, Moh and Irawati, Ninik and Harun, Sulaiman Wadi and Ahmad, Fauzan and Khasanah, Miratul (2019) Sodium nitrate (NaNO3) sensor based on graphene coated microfiber. Measurement, 146. pp. 208-214. ISSN 0263-2241, DOI

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We demonstrate the coating of graphene onto the silica optical microfiber sensor for improving sodium nitrate detection at room temperature. The graphene obtained from graphene- polylactic acid filament was coated onto the microfiber based on drop casting technique. In the proposed sensor, the graphene acts as cladding to interact with analyte as well as functions to trap either sodium cation or nitrate anion and increases the effective refractive index of the cladding. The proposed sensor shows a good sensitivity of 1.29 dBm/% and resolution of 0.049%. The sensitivity, repeatababilty and reversible response of the sensor were improved by the coating of graphene layer. The presence of graphene on the surface microfiber works as passive cladding and influence the light propagation through the microfiber. © 2019 Elsevier Ltd

Item Type: Article
Funders: Airlangga University Research Grant through Tahir Professorship Program (Grant No. 1149/UN3/2018)
Uncontrolled Keywords: Silica microfiber; Sodium nitrate sensor; Biochemical sensor; Chemical sensor; Microfiber sensor; Carbon nanotubes; Food safety; Fiber optic; Graphene
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 27 Nov 2019 05:31
Last Modified: 27 Nov 2019 05:31

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