Graphene meshes decorated with palladium nanoparticles for hydrogen detection
- Authors
- Yi, Jaeseok; Kim, Su Han; Lee, Won Woo; Kwon, Sun Sang; Nam, Sung Woo; Park, Won Il
- Issue Date
- Dec-2015
- Publisher
- IOP PUBLISHING LTD
- Keywords
- graphene; mesh structure; edge-functionalization; Pd nanoparticles; hydrogen sensor
- Citation
- JOURNAL OF PHYSICS D-APPLIED PHYSICS, v.48, no.47, pp.1 - 7
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF PHYSICS D-APPLIED PHYSICS
- Volume
- 48
- Number
- 47
- Start Page
- 1
- End Page
- 7
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/155751
- DOI
- 10.1088/0022-3727/48/47/475103
- ISSN
- 0022-3727
- Abstract
- We fabricated flexible and transparent hydrogen gas sensors based on a palladium-decorated graphene mesh. Electron microscopy analysis confirmed that similar to 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 similar to 5% at a low concentration of 10 ppm H-2/air, even at room temperature. The enhanced H-2 detection characteristic of the graphene mesh sensors is attributed to the existence of edges.
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