Relationship between Gas Sensitivity and Microstructure of Porous SnO₂

A highly sensitive ethanol sensor based on mesoporous ZnO–SnO2nanofibers

“…It is well known that a second component in a metal–oxide–semiconductor sensor can be used both as active positions for redox processes and to promote free charge carriers that increase the electronic conductance of the oxide films [27, 28]. The sensor also has a good stability towards ethanol vapor for more than 30 days under the work temperature of 300 °C (data not shown).…”

Gas‐Sensing Properties of Spinodally Decomposed (Ti,Sn)O2 Thin Films

“…Seiyama et al 2 and Nitta et al 3 reported the effects of the addition of various metals on the gas-sensing properties. The improvement of sensitivity via the control of the particle size of the sensors has also been suggested by Xu et al 4 The properties of SnO 2 compacts, powders, and thin films result from various factors such as particle size, porosity, and surface area, which are dependent upon the preparation procedures. The influence of the SnO 2 microstructure itself on the sensing properties has been studied under various preparation conditions.…”

“…(Ti 0.5 Sn 0.5 )O 2 thin films were prepared on sapphire (0112) substrates by using the sol-gel method. Equimolar amounts of Ti(O-iPr) 4 and Sn(O-iPr) 4 were dissolved in absolute 2-methoxyethanol. The solution was refluxed at a temperature of 124°C, which yielded a homogeneous solution.…”

High‐Yield Synthesis of Nanocrystalline Tin Dioxide by Thermal Decomposition for Use in Gas Sensors

“…The sensors made of these oxides are typically in the form of a thick film or thin film or pellet. The important factors associated with the sensing properties of a nanooxide are the particle size and geometry of their inter‐connection 9 . For particle sizes much <20 nm, the sensitivity to a gas is significantly increased 10,11 .…”

“…The important factors associated with the sensing properties of a nanooxide are the particle size and geometry of their inter-connection. 9 For particle sizes much o20 nm, the sensitivity to a gas is significantly increased. 10,11 Reducing the particle size down to nanoscale enhances the applicability of nanomaterials with a controllable ''surface to volume'' ratio.…”