NO2 and CO interaction with plasma treated Au-decorated MWCNTs: Detection pathways

R. Leghrib*, E. Llobet, A. Felten, J. J. Pireaux, Z. Zanolli, J. C. Charlier, I. Suárez, C. Ewels

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The detection mechanisms of gas sensors based on oxygen plasma functionalised multi wall carbon nanotubes (MWCNTs) and rf plasma-treated nanotubes decorated with gold nanoclusters are experimentally and theoretically investigated. Results from X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM) analysis are discussed. It is found that NO2 detection involves the interaction with oxygenated vacancies and/ or Au nanoclusters present on the nanotube walls, while CO detection is significantly enhanced by the interaction with Au nanoclusters anchored at the nanotube sidewalls. These differences in detection pathways open the possibility for fabricating selective MWCNT sensors.

Original languageEnglish
Pages (from-to)931-934
Number of pages4
JournalProcedia Chemistry
Volume1
Issue number1
DOIs
Publication statusPublished - 1 Sept 2009
Externally publishedYes
EventEurosensors 23rd Conference - Lausanne, Switzerland
Duration: 6 Sept 20099 Sept 2009

Keywords

  • Carbon nanotubes
  • gas sensors

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