Highly sensitive acetone gas sensor based on porous ZnFe2O4 nanospheres

Facile synthesis and gas sensing properties of La2O3–WO3 nanofibers

“…Although it is popularly regarded as relatively low toxic, some investigations have indicated that chronically exposure may damage to the liver, kidney and nerve. Compared with the various traditional analytical systems, gas sensors have been acknowledged as simple and inexpensive tools for detection and quantification of toxic pollutant gases, combustible gases and organic vapors [44]. Acetone gas sensors are in great demand due to the growing concern about air-quality and environmental monitoring.…”

The exceptional adsorption ability and gas-detection sensitivity of Cu2O with tunable morphologies

“…Cu 2 O is a typical p-type semiconductor and its conductivity is highly inuenced by the surface depletion layer, which is characteristic of the surface-controlled type of sensing materials, especially for nanostructures. 26 According to this characteristic, the adsorbed oxygen molecules on the material surface are partially ionized into ionized oxygen species ) in air, and the sensor resistance stands at a relative lower resistance level. When the gas sensor is exposed to reducing gas e.g.…”

Portable Electrochemical Gas Sensing System with a Paper-Based Enzyme Electrode

“…These sensors often read a change in electrical resistance of a semiconductor film by gas adsorption and have features to enable repeated measuremens with high sensitivity. The semiconductor-based detection principle, however, tends to provide a false result due to a poor selectivity, and have an adverse effect on detection accuracy because of repeated measurements [4][5][6][7].…”