Peer-Reviewed Journal Details
Mandatory Fields
Crowley, K;Morrin, A;Hernandez, A;O'Malley, E;Whitten, PG;Wallace, GG;Smyth, MR;Killard, AJ
2008
December
Talanta
Fabrication of an ammonia gas sensor using inkjet-printed polyaniline nanoparticles
Published
146 ()
Optional Fields
FUEL-CELLS FILMS POLYMERIZATION ACID SEMICONDUCTOR CONDUCTIVITY DISPERSIONS STABILITY ELECTRODE POLYMERS
77
710
717
This work details the fabrication and performance of a sensor for ammonia gas analysis which has been constructed via the inkjet-printed deposition of polyaniline nanoparticle films. The conducting films were assembled on interdigitated electrode arrays and characterised with respect to their layer thickness and thermal properties. The sensor was further combined with heater foils for operation at a range of temperatures. When operated in a conductimetric mode, the sensor was shown to exhibit temperature-dependent analytical performance to ammonia, detection. At room temperature, the sensor responded rapidly to ammonia (t(50) = 15 s). Sensor recovery time, response linearity and sensitivity were all significantly improved by operating the sensor at temperatures up to 80 degrees C. The sensor was found to have a stable logarithmic response to ammonia in the range of interest (1-100 ppm). The sensor was also insensitive to Moisture in the range from 35 to 98% relative humidity. The response of the sensor to a range of common potential interferents was also studied. (C) 2008 Elsevier B.V. All rights reserved.
AMSTERDAM
0039-9140
10.1016/j.talanta.2008.07.022
Grant Details