Detection of Ethanol Vapor by modification of the electrical conductivity of Tin Dioxide

Authors

  • Fernando Huamán Universidad Nacional de Ingeniería, Facultad de Ciencias, Lima, Perú
  • Luis Reyes Universidad Nacional de Ingeniería, Facultad de Ciencias, Lima, Perú
  • Walter Estrada Universidad Nacional de Ingeniería, Facultad de Ciencias, Lima, Perú
  • Abel Gutarra Universidad Nacional de Ingeniería, Facultad de Ciencias, Lima, Perú

DOI:

https://doi.org/10.21754/tecnia.v9i1.418

Abstract

Sintered tin-oxide-based coating have been fabricated for ethanol vapor sensing. After an appropriate annealing process, particles of low coalescence levels were obtained. The vapor detection is based on the surface resistance variation of the coating due to ethanol vapor presenc. A simplified theoretical model based on surface  adsorption of ionized molecules was used in order to explain this behavior. Our data fitted quite well in the range of 10-130 ug/ml. 

For vapor concentration in air we found an experimental value of n=0.63 in the electrical conductance relationship G=G0 [v]m

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References

[1] Madau, M.J., Morrison, S., "Chemical sensing with solid state device", Academic Press, (1989)

[2] Morrison, S.R. "The Chemical physics of surfaces", Plenum Press, New York (1978).

[3] Lannto, V., Romppainen, p., "Surfaces Science", 192, 243, (1987).

[4] Munnix, S., Sheits, M., "Physical Review", B27, 7624, (1982).

[5] Rantalla, T.S., Lantto, V., Rantalla, T.T., "Sensors and actuators", B18, 716, (1994)

[6] Huamán, F., "Detección de Vapor de Etanol Mediante Recubrimiento Poroso de Dióxido de Estaño", Tesis de Licenciatura, Facultad de Ciencias, UNI, Lima-Perú, (1998)

[7] Castillejo, M., "Detección cualitativa de CO2 y O2 con películas delgadas de SnO2", Tesis de Licenciatura, Facultad de Ciencias, UNI, Lima-Perú, (1994).

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Published

1998-06-01

How to Cite

[1]
F. Huamán, L. Reyes, W. Estrada, and A. Gutarra, “Detection of Ethanol Vapor by modification of the electrical conductivity of Tin Dioxide”, TEC, vol. 9, no. 1, Jun. 1998.

Issue

Vol. 9 No. 1 (1998)

Section

Articles

License

Copyright (c) 1998 TECNIA

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