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Hypersensitive H2 sensor based on polymer planar Bragg gratings coated with Pt-loaded WO3-SiO2

  • This letter demonstrates a novel hydrogen sensor based on a polymer planar Bragg grating coated with Pt-loaded WO3-SiO2. The reflected Bragg signal shows a distinct peak splitting correlated to substrate anisotropies originating from the injection molding process. Especially at low H2 concentrations, both sensing peaks exhibit an outstanding response to the heat generated by the exothermic reaction between hydrogen molecules and coating. Thereby, a hydrogen volume ratio of 50 ppm leads to a Bragg wavelength shift of -37 pm, which yields an outstandingly low detection limit of only 5 ppm H2 in air. Thus, functionalized polymer planar Bragg gratings are eminently suitable for H2 leak detection applications.
Metadaten
Author:Stefan KeferORCiD, Jixiang Dai, Minghong Yang, Bernhard SchmaussORCiD, Ralf HellmannORCiD
URL:https://www.osapublishing.org/ol/abstract.cfm?uri=ol-45-13-3601
DOI:https://doi.org/https://doi.org/10.1364/OL.395341
Parent Title (English):Optics Letters
Document Type:Article
Language:English
Year of Completion:2020
Date of first Publication:2020/06/26
Release Date:2020/06/30
Tag:Bragg Grating Sensors; Cyclic Olefin Copolymers; Hydrogen Detection
GND Keyword:Gassensor; Wasserstoff; Bragg-Reflektor
Volume:45
Issue:13
First Page:3601
Last Page:3604
Urheberrecht:0
research focus :Intelligent Systems / Intelligent Sensors and Signals
Materials / Innovative Material Processing
Materials / Material Testing & Sensor Technology
Licence (German):Keine Lizenz - es gilt das deutsche Urheberrecht
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