The recent development of metal oxide heterostructures based gas sensor, their future opportunities and challenges: A review

Microheater Integrated Nanotube Array Gas Sensor for Parts-Per-Trillion Level Gas Detection and Single Sensor-Based Gas Discrimination

“…Recently, researchers have devoted great efforts to overcome the drawbacks of MOX-based gas sensors. Various strategies, such as adding a porous overlayer above the sensor films as molecular sieve, or functionalizing the surface with noble metals or oxides as catalytic sites, have been adopted to improve the poor selectivity and LOD of the MOX-based gas sensors. − Gas sensor arrays integrated with multiple gas sensors have also been demonstrated as an effective method to discriminate multiple gases, attributing to their abundant extractable output information. − However, complicated sensor array construction and data processing are still inevitable, and implementing the gas discrimination with single sensor is in urgent pursuance. One option is to add a molecular sieve in front of a single sensor, which discriminates gases by time-series data depending on gas diffusion properties in the molecular sieve .…”

MnO2-SnO2 Based Liquefied Petroleum Gas Sensing Device for Lowest Explosion Limit Gas Concentration

“…1,2 So, the development of a quick responsive, highly selective, and the stable sensor is the most urgent requirement that should consume less power, trace a small amount of gas, and operate at low temperatures. [3][4][5] Numerous types of nanostructured nanomaterials are used to detect the various type of gases such as metal oxide, conducting polymers, 4,6,7 carbon nanotubes, graphene oxide, and metal-organic framework, etc. [8][9][10] Liquefied petroleum gas (LPG) is a highly explosive gas that is widely used in domestic and industries and it is very harmful to the human being as well as the environment.…”

Synergistic improvement of sensing performance in ferroelectric transistor gas sensors using remnant polarization

“…[10][11][12] Since its first report 60 years ago, resistor-type gas sensors with metal oxide conductive channels have been proven effective in detecting hazardous gases. 12 Accordingly, extensive efforts and most existing studies have focused on changing the morphology of metal oxides, such as doping a noble metal onto the metal oxide, 13 forming a heterojunction, [14][15][16] and changing the dimension of nanostructure. [17][18][19] As seen from these examples, previous research is mainly conducted considering material science.…”