Selectivity enhancement of SnO2 sensors by means of operating temperature modulation

Spray deposited Mg-doped SnO2 thin film LPG sensor: XPS and EDX analysis in relation to deposition temperature and doping

“…They enjoy additional advantages such as short response time, low cost and reduced size. Even with these qualities they suffer from the lack of selectivity in addition to the high operating temperatures [5].…”

Characterization of SnO2 thin films prepared by a liquid phase deposition method and dynamic responses to alcohol vapors

“…However, the dynamic response was an attempt to add the parameter 'time' in sensing a gas to acquire characteristic information about the gas and, actually, there were some reports claiming that non-linear phenomena in the dynamic response enhanced the selectivity. 12) The advantage of this method is that the device structure is much simpler and only a single sensor element can recognize various gases with the specific signals arising in the electric conductance (or resistance) under a transient temperature condition. Most of those works aimed at realization of gas sensors for volatile organic compounds (VOCs) and the dynamic response successfully demonstrated the gas identification for alcohol vapors and other hydrocarbons.…”

Sensor array and stop-flow mode applied to discrimination and quantification of gas mixtures

“…Recently, this situation has changed. It is caused by a fact that transient responses provide much more information than response values obtained in stationary conditions [4][5][6][7]. After considering these advantages and shortcomings, we decided to propose another strategy.…”