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http://dx.doi.org/10.5369/JSST.2012.21.6.425

Fabrication of Hydrogen Sensors Using Graphenes Decorated Nanoparticles and Their Characteristics  

Kim, Kang-San (School of Electrical Eng., University of Ulsan)
Chung, Gwiy-Sang (School of Electrical Eng., University of Ulsan)
Publication Information
Journal of Sensor Science and Technology / v.21, no.6, 2012 , pp. 425-428 More about this Journal
Abstract
This paper presents the fabrication and characterization of graphene based hydrogen sensors. Graphene was synthesized by annealing process of Ni/3C-SiC thin films. Graphene was transferred onto oxidized Si substrates for fabrication of chemiresistive type hydrogen sensors. Au electrode on the graphene shows ohmic contact and the resistance is changed with hydrogen concentration. Nanoparticle catalysts of Pd and Pt were decorated. Response factor and response (recovery) time of hydrogen sensors based on the graphene are improved with catalysts. The response factors of pure graphene, Pt and Pd doped graphenes are 0.28, 0.6 and 1.26, respectively, at 50 ppm hydrogen concentration.
Keywords
Hydrogen sensor; Graphene; Pt; Pd; Nanoparticle;
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Times Cited By KSCI : 1  (Citation Analysis)
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