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Graphene meshes decorated with palladium nanoparticles for hydrogen detection

Title
Graphene meshes decorated with palladium nanoparticles for hydrogen detection
Author
박원일
Keywords
graphene; mesh structure; edge-functionalization; Pd nanoparticles; hydrogen sensor
Issue Date
2015-10
Publisher
IOP PUBLISHING LTD
Citation
JOURNAL OF PHYSICS D-APPLIED PHYSICS, v. 48, NO 47, Page. 1-6
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.
URI
http://iopscience.iop.org/article/10.1088/0022-3727/48/47/475103/meta;jsessionid=2FD072E8D6F774025126BBE52409BA0B.ip-10-40-1-105http://hdl.handle.net/20.500.11754/28096
ISSN
0022-3727; 1361-6463
DOI
10.1088/0022-3727/48/47/475103
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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