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

doi:10.1088/0957-4484/21/21/215501

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 journal › Article › peer-review

52 Citations (Scopus)

Abstract

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 language	English
Article number	215501
Journal	Nanotechnology
Volume	21
Issue number	21
DOIs	https://doi.org/10.1088/0957-4484/21/21/215501
Publication status	Published - 2010
Externally published	Yes

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Materials Science(all)
Mechanics of Materials
Mechanical Engineering
Electrical and Electronic Engineering

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title = "H2 sensing characteristics of SnO2 coated single wall carbon nanotube network sensors",

abstract = "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.",

author = "Myung Yang and Kim, {Dai Hong} and Kim, {Won Sik} and Kang, {Tae June} and Lee, {Byung Yang} and Seunghun Hong and Kim, {Yong Hyup} and Hong, {Seong Hyeon}",

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doi = "10.1088/0957-4484/21/21/215501",

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AU - Yang, Myung

AU - Kim, Dai Hong

AU - Kim, Won Sik

AU - Kang, Tae June

AU - Lee, Byung Yang

AU - Hong, Seunghun

AU - Kim, Yong Hyup

AU - Hong, Seong Hyeon

PY - 2010

Y1 - 2010

N2 - 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.

AB - 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.

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

Abstract

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