Environmental monitoring field tests using screen-printed thick-film sensors based on semiconducting oxides

Enrico Traversa, Yoshihiko Sadaoka, Maria Cristina Carotta, Giuliano Martinelli

Research output: Contribution to journalConference articlepeer-review

58 Scopus citations

Abstract

SnO2, TiO2, In2O3, LaFeO3, and SmFeO3 thick films have been prepared by screen-printing technology on alumina substrates with comb-type Au electrodes, starting either from commercial or laboratory-synthesized powders. An array of thick-film prototype sensors has been placed beside a conventional station for environmental monitoring. Field tests have been performed by measuring the change in conductivity of the thick films exposed to real atmosphere. Their electrical response has been compared with the results of the analytical instruments for environmental monitoring, approved by the international standards. The same trend was observed for both systems, with very promising results, when nanostructured oxides have been used for the preparation of the thick films. This allows us to consider as feasible the use of these sensors for cheap, innovative stations for air quality control.

Original languageEnglish (US)
Pages (from-to)181-185
Number of pages5
JournalSensors and Actuators, B: Chemical
Volume65
Issue number1
DOIs
StatePublished - Jun 30 2000
Externally publishedYes
EventIMCS-7: 7th International Meeting on Chemical Sensors - Beijing, China
Duration: Jul 27 1998Jul 30 1998

Bibliographical note

Funding Information:
The present work was partly supported by the National Research Council of Italy (CNR), under the auspices of the Targeted Project “MADESS 2”, and partly by Grant-in-Aids for Scientific Research Nos. 1065081 and 10045045 from the Ministry of Education, Science and Culture of Japan. The authors wish to thank ARPA (sezione di Ferrara) for the useful cooperation and discussion on the innovative monitoring station. Dr. Maria Cristina Casale (CISE, Segrate, Milano) is gratefully acknowledged for the preparation of the titania powders.

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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