Response of oxygen plasma-treated thick film tin oxide sensor array for LPG, CCl4, CO and C3H7OH

Wavelet Coefficient Trained Neural Network Classifier for Improvement in Qualitative Classification Performance of Oxygen-Plasma Treated Thick Film Tin Oxide Sensor Array Exposed to Different Odors/Gases

“…That is why, the high temperature operation of tin oxide sensors makes it necessary to fabricate an integrated heater along with the sensor array [6]- [8] and, thus, the application remains limited. It has been shown in our previous works that oxygen plasma treated sensor array exhibits good sensitivity for various gases at room temperature [9]. However, the array was found to exhibit poor selectivity.…”

“…EXPERIMENTAL [9] Tin oxide based sensors were fabricated at our laboratory by the thick film screen printing technique. The gas sensitive tin oxide paste was doped with 1% (by weight) of each dopant viz.…”

“…Fig. 3(a)-(d) [9] shows the dynamic response of the sensor array in the form of recovery time analysis plots. When the test gas is adsorbed on sensor surface the conductivity of the sensor first increases and then reduces back to its original value.…”

Neuro-Fuzzy Classifiers/Quantifiers for E-Nose Applications

“…It renders a nicely fabricated sensor array less capable of discriminating between two gases/odours in spite of having an appreciable sensitivity. (Chaturvedi et al, 1999) Fig . 5 shows the plot of sensitivity with concentration of the test gas for a 6-sensor array.…”

Structural characteristics and UV-light enhanced gas sensitivity of La-doped ZnO nanoparticles

“…ZnO-based materials are one of the most widely researched and used materials in semiconductor gas sensors. Noble metal dopants, such as Pt, Pd, were used as catalysts in order to improve their sensitivity, selectivity and stability (3S) [1][2][3]. In general, they could reduce the operating temperature, improve 3S and increase the response rates by catalytic reaction.…”