期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 223, 期 -, 页码 481-486出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.09.128
关键词
Reduced graphene oxide; Fiber Bragg gratings; Gas sensor; Etching
资金
- Nanomission project of Department of Science and Technology
- Centre for Strategic Initiates
- Robert Bosch Centre for Cyber Physical Systems, Indian Institute of Science
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.
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