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- W2084348031 abstract "Optical gas sensing performance of optical fibers coated with sputtered Pd/WO<sub>3</sub> films was investigated for low concentration H<sub>2</sub> sensing. This optical fiber H<sub>2</sub> sensor was prepared by RF sputtering of WO<sub>3</sub> on the tip of the multimode fiber at 260°C and subsequently depositing a Pd catalytic layer. Highly uniform nanotextured film, with individual crystallites having diameters in the range of 35-50 nm was observed. The sensing mechanism was based on the reflectance change of Pd/WO<sub>3</sub> layers towards H<sub>2</sub> reliant on the gasochromic effect. Under the conditions of different sensing layer thicknesses and different operating temperatures, full Vis-NIR spectra investigations were carried out during the sensor testing. It was found that the optical fiber H2 sensor coated with Pd/WO<sub>3</sub> film show a remarkable optical reflectance response towards H<sub>2</sub> concentrations as low as 0.06%. The optimum sensing layer thickness was 200 nm and the optimum operating temperature was found to be 100°C." @default.
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- W2084348031 date "2010-09-08" @default.
- W2084348031 modified "2023-10-09" @default.
- W2084348031 title "H 2 sensing performance of optical fibers coated with WO 3 film" @default.
- W2084348031 doi "https://doi.org/10.1117/12.866420" @default.
- W2084348031 hasPublicationYear "2010" @default.
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