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

Research output: Contribution to journalArticle

4 Citations (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.

Original languageEnglish
Pages (from-to)342-346
Number of pages5
JournalJournal of Korean Institute of Metals and Materials
Volume48
Issue number4
DOIs
Publication statusPublished - 2010 Apr 1

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Modelling and Simulation
  • Surfaces, Coatings and Films
  • Metals and Alloys

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