Design, Modeling and Implementation of Pbpc Sensor Array for the Detection of gases

In this paper the voltage/current characteristics and the effect of NO2 gas on the electrical conductivity of a PbPc gas sensor array is studied. The gas sensor is manufactured using vacuum deposition of gold electrodes on sapphire substrate with the lead-phathalocyanine vacuum sublimed on the top of the gold electrodes. In a comparison between two versions of the PbPc gas sensor array, it was found that they differ in gap sizes between the deposited gold electrodes. The sensors are tested at different temperatures to account for conductivity changes as the molecular adsorption/desorption rate is affected by heat. The obtained results are found to be encouraging as the sensors showed stability and sensitivity towards low concentrations of applied NO2 gas.