Graphene meshes decorated with palladium nanoparticles for hydrogen detection

Jaeseok Yi, Su Han Kim, Won Woo Lee, Sun Sang Kwon, Woo Nam Sung, Won Il Park

Research output: Contribution to journalArticlepeer-review

Abstract

We 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.

Original languageEnglish (US)
Article number475103
JournalJournal of Physics D: Applied Physics
Volume48
Issue number47
DOIs
StatePublished - Oct 22 2015

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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