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  • 1 Research Institute for Technical Physics and Materials Science - MFA, Hungarian Academy of Sciences H-1525, Budapest, POB 49, Hungary
  • 2 Research Institute for Technical Physics and Materials Science - MFA, Hungarian Academy of Sciences H-1525, Budapest, POB 49, Hungary
  • 3 Research Institute for Technical Physics and Materials Science - MFA, Hungarian Academy of Sciences H-1525, Budapest, POB 49, Hungary
  • 4 Research Institute for Technical Physics and Materials Science - MFA, Hungarian Academy of Sciences H-1525, Budapest, POB 49, Hungary
  • 5 Research Institute for Technical Physics and Materials Science - MFA, Hungarian Academy of Sciences H-1525, Budapest, POB 49, Hungary
  • 6 Research Institute for Technical Physics and Materials Science - MFA, Hungarian Academy of Sciences H-1525, Budapest, POB 49, Hungary
  • 7 Research Institute for Technical Physics and Materials Science - MFA, Hungarian Academy of Sciences H-1525, Budapest, POB 49, Hungary
  • 8 Research Institute for Technical Physics and Materials Science - MFA, Hungarian Academy of Sciences H-1525, Budapest, POB 49, Hungary
  • 9 Research Institute for Technical Physics and Materials Science - MFA, Hungarian Academy of Sciences H-1525, Budapest, POB 49, Hungary
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Gas sensing properties of different carbon nanotube (mostly multiwall, MWCNT) mats, based on electrical resistance measurement were investigated in a simple arrangement and found that the sensitivity for different gases or vapors highly depends on the pre-treatment and functionalization of nanotubes. The selectivity of the sensing was demonstrated by building a vapor recognition system based on an array of multitube sensors made of differently functionalized MWCNTs.