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• W3205739268 abstract "Recently, colorimetric sensors capable of detecting explosive and toxic molecules have attracted much attention for applications in health and environmental monitoring. Here, we demonstrate the detection of hydrogen gas using gasochromic fabrics and evaluate their performance with a commercial RGB color sensor module. For this purpose, first a thin Pd film was sputter deposited onto the polyester fabric and then amorphous MoO3 films (several microns) were deposited by RF reactive magnetrons in various O2/Ar ratios (from 2.5 to 12.5 O2). Field emission scanning electron microscope (FESEM) identified the morphological changes of the surface at each coating step and showed that the fibrous structure of the fabrics was preserved after coating of the films, which is suitable for better gas adsorption. Exposure to hydrogen caused the obtained MoO3/Pd/polyester samples to turn blue-gray at room temperature and the UV–Vis spectra showed an increase in optical absorption. Their sensitivity was evaluated in the presence of different H2 concentrations from 250 to 10,000 ppm by recording the time variation of color difference (RGB Euclidean distance). A significant correlation was found between absorption spectrum and RGB analysis with respect to oxygen content. The color variation showed a linear behavior with respect to hydrogen concentration for all samples. Response and recovery times, reversibility and reproducibility in the presence of hydrogen gas were also evaluated using the RGB readout data. Overall, the RGB module optimally depicts the sensing characteristics of the gasochromic fabrics in terms of reversibility, sensitivity and reproducibility, which may contribute to their commercial development." @default.
• W3205739268 created "2021-10-25" @default.
• W3205739268 creator A5057910844 @default.
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• W3205739268 date "2021-11-01" @default.
• W3205739268 modified "2023-09-27" @default.
• W3205739268 title "Hydrogen sensing by RGB investigation of gasochromic coloration of MoO3/Pd-coated polyester fabrics" @default.
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• W3205739268 doi "https://doi.org/10.1016/j.ijhydene.2021.09.195" @default.
• W3205739268 hasPublicationYear "2021" @default.
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