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Ultra sensitive NO2 gas detection using the reduced graphene oxide coated etched fiber Bragg gratings

Sridevi, S and Vasu, KS and Bhat, Navakanta and Asokan, S and Sood, AK (2016) Ultra sensitive NO2 gas detection using the reduced graphene oxide coated etched fiber Bragg gratings. In: SENSORS AND ACTUATORS B-CHEMICAL, 223 . pp. 481-486.

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Official URL: http://dx.doi.org/10.1016/j.snb.2015.09.128

Abstract

We report a simple and highly sensitive methodology for the room temperature NO2 gas sensing using reduced graphene oxide (RGO) coated clad etched fiber Bragg grating (eFBG). A significant shift (>10 pm) is observed in the reflected Bragg wavelength (lambda(B)) upon exposing RGO coated on the surface of eFBG to the NO2 gas molecules of concentration 0.5 ppm. The shift in Bragg wavelength is due to the change in the refractive index of RGO by charge transfer from the adsorbing NO2 molecules. The range of NO2 concentration is tested from 0.5 ppm to 3 ppm and the estimated time taken for 50% increase in Delta lambda(B) ranges from 20 min (for 0.5 ppm) to 6 min (for 3 ppm). (C) 2015 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
Keywords: Reduced graphene oxide; Fiber Bragg gratings; Gas sensor; Etching
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Depositing User: Id for Latest eprints
Date Deposited: 14 Jan 2016 07:27
Last Modified: 23 Oct 2018 07:25
URI: http://eprints.iisc.ac.in/id/eprint/53073

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