The aim of this paper is to present the design of a sensor array based on a single substrate with various composite polymer films as active layers for gas detection. A low power, four element flexible sensor platform with heater and temperature sensor was designed. The advantages of resistive sensors are easy fabrication, simple operation and low production cost. Composite polymer films exhibit good sensitivity to low gas concentrations at room temperatures. The principle of the designed sensor array is a change of electrical resistance in dependence of gas concentration. PANI, PANI/CNT, PANI/SnO2 and PANI/TiO2 composites were used as active layers. Gas sensing properties of active layers for NH3, CO2, NO2, O2, acetone, toluene and relative humidity were studied. PANI composites, unlike pristine PANI, exhibit good reversibility and lower temperature dependence.
eng
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
IEEE Sensors Council
dc.relation.ispartof
IEEE Sensors Journal
dc.subject
Temperature sensors
eng
dc.subject
Sensor arrays
eng
dc.subject
Gas detectors
eng
dc.subject
Polymers
eng
dc.subject
Chemical elements
eng
dc.subject
Temperature
eng
dc.title
Performance Evaluation of Low-Cost Flexible Gas Sensor Array with Nanocomposite Polyaniline Films