Ammonia sensing characteristics of thin film based on polyelectrolyte templated polyaniline

Abstract A novel conductive polyaniline is synthesized using poly(4-styrenesulfonate-co-maleic acid) as counter ion and template. The resistance of this electroactive polymer increases in the presence of gases such as ammonia. This transducing property is exploited and spin-cast film of this material on glass substrate is established as ammonia gas sensor module, for gas concentrations in the range 5–250 ppm. In this range, the response and recovery times are typically 50–1000 s. The resistance response ( R / R 0 ) at short time scales of about 150 s, is shown to vary linearly with the ammonia concentration.

[1]  B. Lubentsov,et al.  Conducting polymer interaction with gaseous substances II. PANI-H2O, PANI-NH3 , 1991 .

[2]  Vasant Chabukswar,et al.  Acrylic acid doped polyaniline as an ammonia sensor , 2001 .

[3]  Hsuan‐Jung Huang,et al.  Application of a polyaniline based ammonium sensor for the amperometric immunoassay of a urease conjugated Tal 1 protein , 2002 .

[4]  Andrew P. Monkman,et al.  Polyaniline thin films for gas sensing , 1995 .

[5]  Sze‐cheng Yang,et al.  Double-strand polyaniline , 1997 .

[6]  Toshihiro Miyata,et al.  High sensitivity chlorine gas sensors using Cu–phthalocyanine thin films , 2003 .

[7]  Jiri Janata,et al.  Principles of Chemical Sensors , 1989 .

[8]  B. Sreedhar,et al.  Polyelectrolyte templated polyaniline—film morphology and conductivity , 2003 .

[9]  R. Chandra,et al.  Conducting polyaniline composite: a reusable sensor material for aqueous ammonia , 2001 .

[10]  J. Gardner,et al.  Microsensors, MEMS, and Smart Devices , 2001 .

[11]  Subhas Chandra,et al.  Application of conducting polyaniline as sensor material for ammonia , 1997 .

[12]  S. M. Yang,et al.  The properties of polyaniline-polyelectrolyte complexes , 1997 .

[13]  Gregory T. A. Kovacs,et al.  Field Evaluation of an Electrochemical Probe for in Situ Screening of Heavy Metals in Groundwater , 1998 .

[14]  Sergey A. Piletsky,et al.  Ammonia sensors based on sensitive polyaniline films , 1996 .

[15]  B. H. Weiller,et al.  Polyaniline nanofibers: facile synthesis and chemical sensors. , 2003, Journal of the American Chemical Society.