Effects of Pd nanoparticles on single-walled carbon nanotubes as high-sensitivity hydrogen gas sensors

Jun Min Lee; Seonghwa Ju; Jin Hyoun Joe; Sung Jin Kim; Wooyoung Lee

doi:10.3365/KJMM.2010.48.04.342

Effects of Pd nanoparticles on single-walled carbon nanotubes as high-sensitivity hydrogen gas sensors

Jun Min Lee, Seonghwa Ju, Jin Hyoun Joe, Sung Jin Kim, Wooyoung Lee

Department of Chemistry & Nanoscience

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Pd nanoparticles (NPs) were successfully functionalized on the surfaces of single-walled carbon nanotubes (SWNTs) by dendrimer-mediated synthesis. The hydrogen sensing properties of the Pd NPs functionalized SWNTs were investigated. Pd NPs-dendrimer-SWNTs sensors show much better speeds and superior recovery rates but lower sensitivity compared toPd NPs-functionalized SWNTs directly fabricated due to the existence of dendrimers. Pyrolysis of the dendrimers by heat treatment resulted in afast response time and high sensitivity owing to the reduced length of the dendrimers. Theseresults demonstrate that the heat treatment of dendrimers in Pd NPs-dendrimer-SWNTs sensors can enable significant electrical conductance modulation upon exposure to extremely low concentrations (10 ppm) of hydrogen gas (H₂) in air.

Original language	English
Pages (from-to)	342-346
Number of pages	5
Journal	Journal of Korean Institute of Metals and Materials
Volume	48
Issue number	4
DOIs	https://doi.org/10.3365/KJMM.2010.48.04.342
State	Published - Apr 2010

Keywords

Carbon and graphite
Chemical synthesis
Hydrogen
Hydrogen absorbing materials
Transmission electron microscopy (TEM)

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10.3365/KJMM.2010.48.04.342

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abstract = "Pd nanoparticles (NPs) were successfully functionalized on the surfaces of single-walled carbon nanotubes (SWNTs) by dendrimer-mediated synthesis. The hydrogen sensing properties of the Pd NPs functionalized SWNTs were investigated. Pd NPs-dendrimer-SWNTs sensors show much better speeds and superior recovery rates but lower sensitivity compared toPd NPs-functionalized SWNTs directly fabricated due to the existence of dendrimers. Pyrolysis of the dendrimers by heat treatment resulted in afast response time and high sensitivity owing to the reduced length of the dendrimers. Theseresults demonstrate that the heat treatment of dendrimers in Pd NPs-dendrimer-SWNTs sensors can enable significant electrical conductance modulation upon exposure to extremely low concentrations (10 ppm) of hydrogen gas (H2) in air.",

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AU - Ju, Seonghwa

AU - Joe, Jin Hyoun

AU - Kim, Sung Jin

AU - Lee, Wooyoung

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AB - Pd nanoparticles (NPs) were successfully functionalized on the surfaces of single-walled carbon nanotubes (SWNTs) by dendrimer-mediated synthesis. The hydrogen sensing properties of the Pd NPs functionalized SWNTs were investigated. Pd NPs-dendrimer-SWNTs sensors show much better speeds and superior recovery rates but lower sensitivity compared toPd NPs-functionalized SWNTs directly fabricated due to the existence of dendrimers. Pyrolysis of the dendrimers by heat treatment resulted in afast response time and high sensitivity owing to the reduced length of the dendrimers. Theseresults demonstrate that the heat treatment of dendrimers in Pd NPs-dendrimer-SWNTs sensors can enable significant electrical conductance modulation upon exposure to extremely low concentrations (10 ppm) of hydrogen gas (H2) in air.

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KW - Chemical synthesis

KW - Hydrogen

KW - Hydrogen absorbing materials

KW - Transmission electron microscopy (TEM)

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Effects of Pd nanoparticles on single-walled carbon nanotubes as high-sensitivity hydrogen gas sensors

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Keywords

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