H2 sensing characteristics of SnO2 coated single wall carbon nanotube network sensors

Myung Yang, Dai Hong Kim, Won Sik Kim, Tae June Kang, Byung Yang Lee, Seunghun Hong, Yong Hyup Kim, Seong Hyeon Hong

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)


SnO2 nanoparticle coated single wall nanotube (SWNT) network sensors were fabricated by forming a SWNT network on the Pt patterned SiO 2/Si substrate using a dip coating method and subsequently depositing SnO2 nanoparticles on the SWNT network by rf magnetron sputtering. Their H2 gas sensing properties were investigated. The SnO 2-SWNT network sensors stably and reversibly responded to H 2 gas even at room temperature and could detect H2 gas down to 100ppm. In addition to the low temperature detection, a remarkable finding was that the gas sensing behavior of SnO2-SWNT network sensors was changed from p-type to n-type with increasing SnO2 deposition time (i.e.surface coverage of SnO2 on SWNT). A schematic model was proposed to explain the switching of sensing behavior depending on the surface coverage of SnO2 nanoparticles on the SWNTs.

Original languageEnglish
Article number215501
Issue number21
Publication statusPublished - 2010
Externally publishedYes

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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