Highly sensitive and selective WO3 nanoparticle gas sensor operating in thermally modulated dynamic mode

R. Ionescu, A. Hoel, C. G. Granqvist, E. Llobet, P. Heszler

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Nanoparticle films of crystalline WO3, designed for gas sensing applications, were deposited on alumina substrates b reactive gas deposition. 2S, ethanol vapour, and binary mixtures of ethanol/H 2S, ethanol/NO2 and H2S/NO2 were used in different concentrations for testing the performance of the sensor device. The sensor was operated in dynamic mode by modulating its temperature between 150 and 250°C. Coefficients were extracted by applying Fast Fourier Transfer (FFT) and Discrete Wavelet Transform (DWT) methods to the dynamic resistance response of the sensor. These coefficients were then used as inputs for pattern recognition methods to extract both quantitative (concentration) and qualitative (chemical selectivity) information about the test gases. After sensor calibration, it was possible to detect as little as 200 ppb of ethanol and 20 ppb of H2S with good accuracy. Furthermore, ethanol and 2S could be detected with good sensitivity and selectivity in the presence of both reducing and oxidising gases.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsJ.M. Smulko, Y. Blanter, M.I. Dykman, L.B. Kish
Pages347-358
Number of pages12
Volume5472
DOIs
Publication statusPublished - 2004
EventNoise and Information in Nanoelectronics, Sensors, and Standards II - Maspalomas
Duration: May 26 2004May 28 2004

Other

OtherNoise and Information in Nanoelectronics, Sensors, and Standards II
CityMaspalomas
Period5/26/045/28/04

Fingerprint

Chemical sensors
Ethanol
ethyl alcohol
Nanoparticles
nanoparticles
sensors
gases
Sensors
Gases
selectivity
Discrete wavelet transforms
coefficients
Binary mixtures
pattern recognition
wavelet analysis
binary mixtures
Pattern recognition
Alumina
aluminum oxides
Vapors

Keywords

  • Discrete Wavelet Transform
  • Fast Fourier Transform
  • Gas sensor
  • Pattern recognition
  • Temperature modulation
  • Wo nanoparticle

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Ionescu, R., Hoel, A., Granqvist, C. G., Llobet, E., & Heszler, P. (2004). Highly sensitive and selective WO3 nanoparticle gas sensor operating in thermally modulated dynamic mode. In J. M. Smulko, Y. Blanter, M. I. Dykman, & L. B. Kish (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 5472, pp. 347-358) https://doi.org/10.1117/12.547235

Highly sensitive and selective WO3 nanoparticle gas sensor operating in thermally modulated dynamic mode. / Ionescu, R.; Hoel, A.; Granqvist, C. G.; Llobet, E.; Heszler, P.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / J.M. Smulko; Y. Blanter; M.I. Dykman; L.B. Kish. Vol. 5472 2004. p. 347-358.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ionescu, R, Hoel, A, Granqvist, CG, Llobet, E & Heszler, P 2004, Highly sensitive and selective WO3 nanoparticle gas sensor operating in thermally modulated dynamic mode. in JM Smulko, Y Blanter, MI Dykman & LB Kish (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 5472, pp. 347-358, Noise and Information in Nanoelectronics, Sensors, and Standards II, Maspalomas, 5/26/04. https://doi.org/10.1117/12.547235
Ionescu R, Hoel A, Granqvist CG, Llobet E, Heszler P. Highly sensitive and selective WO3 nanoparticle gas sensor operating in thermally modulated dynamic mode. In Smulko JM, Blanter Y, Dykman MI, Kish LB, editors, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 5472. 2004. p. 347-358 https://doi.org/10.1117/12.547235
Ionescu, R. ; Hoel, A. ; Granqvist, C. G. ; Llobet, E. ; Heszler, P. / Highly sensitive and selective WO3 nanoparticle gas sensor operating in thermally modulated dynamic mode. Proceedings of SPIE - The International Society for Optical Engineering. editor / J.M. Smulko ; Y. Blanter ; M.I. Dykman ; L.B. Kish. Vol. 5472 2004. pp. 347-358
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