Printed hydrogen sulfide gas sensor on paper substrate based on polyaniline composite

The fabrication of a hydrogen sulfide (H2S) sensor based on polyaniline (PANI)-metal salt (CuCl2) composite is demonstrated. The sensing film was produced by screen printing and spray coating of the sensing material on interdigitated silver electrodes inkjet-printed on a paper substrate. The H2S sen...

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Bibliographic Details
Published in:Thin solid films 2013-05, Vol.534, p.621-628
Main Authors: Sarfraz, J., Ihalainen, P., Määttänen, A., Peltonen, J., Lindén, M.
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Copper chloride
Copper sulfide
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Gas sensor
General equipment and techniques
Hydrogen sulfide
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Materials science
Methods of deposition of films and coatings
film growth and epitaxy
Paper substrate
Physics
Polyaniline
Printed sensor
Sensors (chemical, optical, electrical, movement, gas, etc.)
remote sensing
Spray coating techniques
Structure and morphology
thickness
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
Thin film structure and morphology
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Summary:The fabrication of a hydrogen sulfide (H2S) sensor based on polyaniline (PANI)-metal salt (CuCl2) composite is demonstrated. The sensing film was produced by screen printing and spray coating of the sensing material on interdigitated silver electrodes inkjet-printed on a paper substrate. The H2S sensing functionality with respect to pH and metal salt concentration was optimized. In addition, the long term stability and humidity effects on the sensor performance were investigated. The printed chemiresistors showed more than five orders of magnitude change in resistance within 20min of exposure of 15ppm H2S at room temperature. The relatively fast kinetics and large response of the sensor can be explained by the formation of Cu2S and subsequent protonation of PANI. In addition, the relatively large roughness and porosity of the paper substrate offers an increased surface sensing area. •pH, salt concentration, film thickness, cross sensitivity•Printed sensor on paper substrate•Commercial polyaniline against special morphologies
ISSN:0040-6090
1879-2731
DOI:10.1016/j.tsf.2013.02.055