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Sensors 2009, 9(11), 9122-9132; doi:10.3390/s91109122
Article

Electrosprayed Metal Oxide Semiconductor Films for Sensitive and Selective Detection of Hydrogen Sulfide

1,* , 1
, 2
 and 1
Received: 13 October 2009; in revised form: 5 November 2009 / Accepted: 6 November 2009 / Published: 17 November 2009
(This article belongs to the Special Issue Gas Sensors 2009)
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Abstract: Semiconductor metal oxide films of copper-doped tin oxide (Cu-SnO2), tungsten oxide (WO3) and indium oxide (In2O3) were deposited on a platinum coated alumina substrate employing the electrostatic spray deposition technique (ESD). The morphology studied with scanning electron microscopy (SEM) and atomic force microscopy (AFM) shows porous homogeneous films comprising uniformly distributed aggregates of nano particles. The X-ray diffraction technique (XRD) proves the formation of crystalline phases with no impurities. Besides, the Raman cartographies provided information about the structural homogeneity. Some of the films are highly sensitive to low concentrations of H2S (10 ppm) at low operating temperatures (100 and 200 °C) and the best response in terms of Rair/Rgas is given by Cu-SnO2 films (2500) followed by WO3 (1200) and In2O3 (75). Moreover, all the films exhibit no cross-sensitivity to other reducing (SO2) or oxidizing (NO2) gases.
Keywords: semiconductor metal oxide; electrostatic spray deposition; gas sensors; pollutant gases semiconductor metal oxide; electrostatic spray deposition; gas sensors; pollutant gases
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Ghimbeu, C.M.; Lumbreras, M.; Schoonman, J.; Siadat, M. Electrosprayed Metal Oxide Semiconductor Films for Sensitive and Selective Detection of Hydrogen Sulfide. Sensors 2009, 9, 9122-9132.

AMA Style

Ghimbeu CM, Lumbreras M, Schoonman J, Siadat M. Electrosprayed Metal Oxide Semiconductor Films for Sensitive and Selective Detection of Hydrogen Sulfide. Sensors. 2009; 9(11):9122-9132.

Chicago/Turabian Style

Ghimbeu, Camelia Matei; Lumbreras, Martine; Schoonman, Joop; Siadat, Maryam. 2009. "Electrosprayed Metal Oxide Semiconductor Films for Sensitive and Selective Detection of Hydrogen Sulfide." Sensors 9, no. 11: 9122-9132.


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