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

Title
Effects of Pd nanoparticles on single-walled carbon nanotubes as high-sensitivity hydrogen gas sensors
Authors
Lee J.M.Ju S.Joe J.H.Kim S.-J.Lee W.
Ewha Authors
김성진
SCOPUS Author ID
김성진scopus
Issue Date
2010
Journal Title
Journal of Korean Institute of Metals and Materials
ISSN
1738-8228JCR Link
Citation
vol. 48, no. 4, pp. 342 - 346
Indexed
SCIE; SCOPUS; KCI WOS scopus
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.
DOI
10.3365/KJMM.2010.48.04.342
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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