Journal
SENSORS
Volume 19, Issue 6, Pages -Publisher
MDPI
DOI: 10.3390/s19061290
Keywords
hydrogen sensor; organic nanofibers; high sensitivity; sputtering; nanoparticles
Funding
- National Key Research and Development Program of China [2016YFB0501303]
- foundation of National Key Laboratory of Science and Technology on Vacuum Technology and Physics [ZWK1701]
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A highly sensitive and flexible hydrogen sensor based on organic nanofibers decorated by Pd nanoparticles (NPs) was designed and fabricated for low-concentration hydrogen detection. Pd NPs were deposited on organic nanofiber materials by DC magnetron sputtering. The temperature dependence of the sensitivity at 25 ppm H-2 was characterized and discussed, and the maximum response of the sensor increased linearly with increasing measurement temperature. Performances of the hydrogen sensor were investigated with hydrogen concentration ranging from 5 ppm to 50 ppm. This sensor exhibits high sensitivity, with the response up to 6.55% for H-2 as low as 5 ppm, and the output response of the hydrogen sensor increased linearly with the square root of hydrogen concentration. A cycling test between pure nitrogen and 25 ppm hydrogen concentration was performed, and the hydrogen sensor exhibited excellent consistency.
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