The Effects of Two Thick Film Deposition Methods on Tin Dioxide Gas Sensor Performance

Article, Other literature type English OPEN
Bakrania, Smitesh D. ; Wooldridge, Margaret S. (2009)
  • Publisher: Molecular Diversity Preservation International
  • Journal: Sensors, volume 9, issue 9, pages 6,853-6,868 (issn: 1424-8220, eissn: 1424-8220)
  • Related identifiers: pmc: PMC3290492, doi: 10.3390/s90906853
  • Subject: combustion | TP1-1185 | fabrication | gas sensor | deposition | Chemical technology | SnO2 | film | binder | Article

This work demonstrates the variability in performance between SnO2 thick film gas sensors prepared using two types of film deposition methods. SnO2 powders were deposited on sensor platforms with and without the use of binders. Three commonly utilized binder recipes were investigated, and a new binder-less deposition procedure was developed and characterized. The binder recipes yielded sensors with poor film uniformity and poor structural integrity, compared to the binder-less deposition method. Sensor performance at a fixed operating temperature of 330 ºC for the different film deposition methods was evaluated by exposure to 500 ppm of the target gas carbon monoxide. A consequence of the poor film structure, large variability and poor signal properties were observed with the sensors fabricated using binders. Specifically, the sensors created using the binder recipes yielded sensor responses that varied widely (e.g., S = 5 – 20), often with hysteresis in the sensor signal. Repeatable and high quality performance was observed for the sensors prepared using the binder-less dispersion-drop method with good sensor response upon exposure to 500 ppm CO (S = 4.0) at an operating temperature of 330 ºC, low standard deviation to the sensor response (±0.35) and no signal hysteresis.
  • References (29)
    29 references, page 1 of 3

    1. Miller, T.A.; Bakrania, S.D.; Perez, C.; Wooldridge, M.S. Nanostructured tin dioxide materials for gas sensor applications. In Functional Nanomaterials; Geckeler, K.E., Rosenberg, E., Eds.; American Scientific Publishers: Valencia, CA, USA, 2006; pp. 453-476.

    2. Varghese, O.K.; Grimes, C.A. Metal oxide nanoarchitectures for environmental sensing. J. Nanosci. Nanotechnol. 2003, 3, 277-293.

    3. Wang, C.C.; Akbar, S.A.; Madou, M.J. Ceramic based resistive sensors. J. Electroceram. 1998, 2, 273-282.

    4. Gopal Reddy, C.V.; Manorama, S.V. Room temperature hydrogen sensor based on SnO2:La2O3. J. Electrochem. Soc. 2000, 147, 390-393.

    5. Barsan, N.; Schweizer-Berberich, M.; Göpel, W. Fresenius, fundamental and practical aspects in the design of nanoscaled SnO2 gas sensors: a status report. J. Anal. Chem. 1999, 365, 287-304.

    6. Diéguez, A.; Romano-Rodríguez, A.; Morante, J.R.; Kappler, J.; Bârsan, N.; Göpel, W. Nanoparticle engineering for gas sensor optimisation: improved sol-gel fabricated nanocrystalline SnO2 thick film gas sensor for NO2 detection by calcination, catalytic metal introduction and grinding treatments. Sens. Actuat. B Chem. 1999, 60, 125-137.

    7. Lee, S.; Lee, G.; Kim, J.; Kang, S.L. A novel process for fabrication of SnO2-based thick film gas sensors. Sens. Actuat. B Chem. 2007, 123, 331-335.

    8. Durrani, S.M. Biasing voltage dependence of sensitivity of electron beam evaporated SnO2 thin film CO sensor. Sensors 2006, 6, 115-1160.

    9. Ando, M.; Tsuchida, T.; Miura, N.; Yamazoe, N. Influences of microstructure on hydrogen sulfide sensing characteristics of tin dioxide films. Nippon Kagaku Kaishi 1996, 4, 348-353.

    10. Hübner, H.P.; Obermeier, E. Reactively sputtered tin oxide thin-film gas sensors: correlation between fabrication parameters and co-sensitivity. Sens. Actuat. 1989, 17, 351-354.

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