Graphene oxide-deposited tilted fiber grating for ultrafast humidity sensing and human breath monitoring


We propose and experimentally demonstrate a high-performance relative humidity (RH) sensor by depositing graphene oxide (GO) onto tilted fiber grating (TFG). The largely tilted grating planes of the employed TFG can induce a set of polarization-dependent cladding modes and strong evanescent field to couple with the humidity-dependent dielectric of GO layer. The GO-deposited TFG presents the response sensitivities of 18.5 pm/%RH and 0.027 dB/%RH in the range of 30%˜80%RH by tracking the wavelength and intensity of a specific cladding mode resonance. By monitoring the human breath with different frequencies, the sensor exhibits an ultrafast response within ˜42 ms due to the thin GO film and unimpeded permeation of water molecules through GO interlayer. The easy fabrication, low hysteresis, fast response, and high repeatability and reliability of the proposed RH sensor may enable many potential applications including pharmaceutical processing, human health and environmental monitoring.

Publication DOI:
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
College of Engineering & Physical Sciences
Additional Information: © 2019 Published by Elsevier B.V. CC BY-NC-ND. Funding: National Natural Science Foundation of China (Grants No. 61775182, 61505165, and 61522507).
Uncontrolled Keywords: Graphene oxide,Human breath monitoring,Humidity sensor,Tilted fiber grating,Electronic, Optical and Magnetic Materials,Instrumentation,Condensed Matter Physics,Surfaces, Coatings and Films,Metals and Alloys,Electrical and Electronic Engineering,Materials Chemistry
Publication ISSN: 0925-4005
Last Modified: 27 May 2024 07:29
Date Deposited: 14 May 2019 08:35
Full Text Link:
Related URLs: https://linking ... 92540051930718X (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2019-08-15
Published Online Date: 2019-05-08
Accepted Date: 2019-05-08
Authors: Jiang, Biqiang
Bi, Zhixuan
Hao, Zhen
Yuan, Qingchen
Feng, Dingyi
Zhou, Kaiming (ORCID Profile 0000-0002-6011-1912)
Zhang, Lin (ORCID Profile 0000-0002-1691-5577)
Gan, Xuetao
Zhao, Jianlin

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