Journal
NANOTECHNOLOGY
Volume 27, Issue 19, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/0957-4484/27/19/195501
Keywords
WS2; flexible; hydrogen sensor; room temperature
Funding
- Iwama Fund at University of California, San Diego
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1246800] Funding Source: National Science Foundation
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We report a flexible hydrogen sensor, composed of WS2 nanosheet-Pd nanoparticle composite film, fabricated on a flexible polyimide substrate. The sensor offers the advantages of lightweight, mechanical durability, room temperature operation, and high sensitivity. The WS2-Pd composite film exhibits sensitivity (R-1/R-2, the ratio of the initial resistance to final resistance of the sensor) of 7.8 to 50 000 ppm hydrogen. Moreover, the WS2-Pd composite film distinctly outperforms the graphene-Pd composite, whose sensitivity is only 1.14. Furthermore, the ease of fabrication holds great potential for scalable and low-cost manufacturing of hydrogen sensors.
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