Fluctuation enhanced gas sensing on functionalized carbon nanotube thin films

Henrik Haspel, Radu Ionescu, P. Heszler, Á. Kukovecz, Z. Kónya, Z. Gingl, Jani Mäklin, Tero Mustonen, Krisztián Kordás, Robert Vajtai, Pulickel M. Ajayan

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Thin films of functionalized carbon nanotubes were deposited on silicon chips by drop-coating and inkjet printing. These sensors were exposed to 50 ppm N2O, CO, H2S and H2O vapour in dry synthetic air. We have found relatively small changes in the electrical resistance of the films exposed to the different test gases. However it is shown that chemical classification of the test gases could still be achieved. To this end pattern recognition technique (Principal Component Analysis) was applied on the acquired power spectral density of the stationary resistance fluctuations of the sensors. The method, whereby fluctuations are used to increase the chemical selectivity of electronic sensors, is called fluctuation enhanced sensing.

Original languageEnglish
Pages (from-to)2339-2342
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume245
Issue number10
DOIs
Publication statusPublished - Oct 2008

Fingerprint

Carbon Nanotubes
Carbon nanotubes
Gases
carbon nanotubes
Thin films
sensors
Sensors
thin films
gases
Acoustic impedance
Power spectral density
Silicon
Carbon Monoxide
principal components analysis
electrical resistance
printing
pattern recognition
Principal component analysis
Pattern recognition
Printing

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Fluctuation enhanced gas sensing on functionalized carbon nanotube thin films. / Haspel, Henrik; Ionescu, Radu; Heszler, P.; Kukovecz, Á.; Kónya, Z.; Gingl, Z.; Mäklin, Jani; Mustonen, Tero; Kordás, Krisztián; Vajtai, Robert; Ajayan, Pulickel M.

In: Physica Status Solidi (B) Basic Research, Vol. 245, No. 10, 10.2008, p. 2339-2342.

Research output: Contribution to journalArticle

Haspel, Henrik ; Ionescu, Radu ; Heszler, P. ; Kukovecz, Á. ; Kónya, Z. ; Gingl, Z. ; Mäklin, Jani ; Mustonen, Tero ; Kordás, Krisztián ; Vajtai, Robert ; Ajayan, Pulickel M. / Fluctuation enhanced gas sensing on functionalized carbon nanotube thin films. In: Physica Status Solidi (B) Basic Research. 2008 ; Vol. 245, No. 10. pp. 2339-2342.
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