Sodium nitrate (NaNO3) sensor based on graphene coated microfiber
Document Type
Article
Publication Date
1-1-2019
Abstract
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
Keywords
Silica microfiber, Sodium nitrate sensor, Biochemical sensor, Chemical sensor, Microfiber sensor, Carbon nanotubes, Food safety, Fiber optic, Graphene
Divisions
fac_eng
Funders
Airlangga University Research Grant through Tahir Professorship Program (Grant No. 1149/UN3/2018)
Publication Title
Measurement
Volume
146
Publisher
Elsevier