Abstract:Development of highly sensitive, stable and reliable eco-friendly gas sensors is still an open-ended research domain and thus demands many related materials. Bismuth-based compounds form an important material platform in such developments; however, they are so far not reviewed. This review highlights the detailed gas sensing attributes for a range of gases and humidity for n-type and p-type as well as mixed composite materials and influences of catalytic doping on gas sensing in different bismuth-based composi… Show more
“…Mature mechanisms have been proposed to explain surface conductivity changes in the presence of water molecules. 52 At a lower RH, charge transport is secured by proton hopping between the chemisorbed hydroxyl groups. Then, with the increase in the humidity, the physisorbed layers increase, causing H + to move freely.…”
Compared with the widely used star material Ti3C2Tx, Ti2CTx, as a representative of thin layer MXene, have unique and attractive performance in many fields, yet its development is severely hampered...
“…Mature mechanisms have been proposed to explain surface conductivity changes in the presence of water molecules. 52 At a lower RH, charge transport is secured by proton hopping between the chemisorbed hydroxyl groups. Then, with the increase in the humidity, the physisorbed layers increase, causing H + to move freely.…”
Compared with the widely used star material Ti3C2Tx, Ti2CTx, as a representative of thin layer MXene, have unique and attractive performance in many fields, yet its development is severely hampered...
“…The sensor device was fabricated using micro fabrication technique , the researchers was used vanadium oxide thin film as a sensing layer using RF sputtering method and the sensors structure was analysed using scanning electron microscopy [120]. The sensors using bismathbased materials was reviewed by the researcher in which both p-type and n-type attributes were discussed and the future scope also discussed by the researchers [121]. The MEMS based gas sensors using SnO 2 nano materials for low concentration gas measurement was discussed.…”
Section: Recent Trends On Mems Based Gas Sensing Technologymentioning
“…The type of materials (either n-type or p-type) assigns the positive or negative change in resistance with respect to relative humidity (RH); for p-type materials, the resistance values increase with % RH and vice versa for n-type materials. 12,14,19 To enrich the ever-evolving demands across multiple fields of applications, numerous studies have been devoted to hybrid, organic and inorganic semiconducting material families. Ferrite is one of the members of the inorganic material family containing binary metallic groups with a high density of active sites for the dissociation of water molecules.…”
Section: Introductionmentioning
confidence: 99%
“…The type of materials (either n-type or p-type) assigns the positive or negative change in resistance with respect to relative humidity (RH); for p-type materials, the resistance values increase with % RH and vice versa for n-type materials. 12,14,19…”
In this study, the ambient temperature humidity sensing properties of solvothermally synthesized MnFe2O4 (MFO) nanospheres on interconnected comb-like silver electrodes were studied systematically.
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