Graphene meshes decorated with palladium nanoparticles for hydrogen detection
2015; Institute of Physics; Volume: 48; Issue: 47 Linguagem: Inglês
10.1088/0022-3727/48/47/475103
ISSN1361-6463
AutoresJaeseok Yi, Su Han Kim, Won‐Woo Lee, Sun Sang Kwon, SungWoo Nam, Won Il Park,
Tópico(s)Analytical Chemistry and Sensors
ResumoWe fabricated flexible and transparent hydrogen gas sensors based on a palladium-decorated graphene mesh. Electron microscopy analysis confirmed that ~2–3 nm diameter Pd nanoparticles were uniformly dispersed on the graphene mesh surfaces. The sensors were highly transparent with an average optical transmission of >90% to visible light and they exhibited good electrical stability with a resistance change of 1.5% under a tensile strain of 1.1% in a cyclic bending-unbending test. Compared with graphene-based sensors, the graphene mesh sensors exhibited a faster response to hydrogen gas with sensitivity as high as ~5% at a low concentration of 10 ppm H2/air, even at room temperature. The enhanced H2 detection characteristic of the graphene mesh sensors is attributed to the existence of edges.
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