Gas sensing properties of p-type hollow NiO hemispheres prepared by polymeric colloidal templating method

NO sensing by single crystalline WO3 nanowires

“…Nanostructured materials offer many advantages such as high surface-to-volume ratio, minimum power consumption, and they can be readily incorporated into microelectronic devices [11]; therefore, a transition from bulk materials [12] to thin films [13,14] and nanostructured materials [10,15,16] is taking place in the last decade. The application of nanostructured materials, such as single crystalline nanowires [17][18][19][20][21][22][23][24][25], nanotubes [26][27][28][29] and polycrystalline nanofibers [30][31][32][33][34][35], nanostructured hollow spheres [36][37][38][39] and hemispheres [40][41][42], has contributed significantly to the development of highly sensitive and selective chemical sensors.…”

NiO-wrapped mesoporous TiO2 microspheres based selective ammonia sensor at room temperature

“…Therefore, similar mechanism might be applied here. NiO has found a good sensitivity to formaldehyde, ethanol and ammonia in literature [29][30][31][32][33]. The responses of p-type NiO to these gases were opposite to those of pure n-type TiO 2 and thus the overall response of NiO-wrapped TiO 2 to alcohols and formaldehyde would be canceled out when the sensing composite has an Fig.…”

High Performance CuO Nanorectangles-Based Room Temperature Flexible NH3Sensor

“…Flexible sensors based on metal oxide (MOx) nanostructures have attracted significant attention considering their high sensitivity, low production cost, ease of fabrication, wear-ability and eco-friendliness [9,10]. There have been several reports on MOx based sensors such as SnO2, ZnO, TiO2, WO3, InO3, CuO, Co3O4 and NiO due to their extremely high sensitivity to hazardous gases (for instance H2S) as well as better selectivity to certain volatile organic compounds (VOCs) [11][12][13][14][15][16][17][18][19]. The adsorption induced variation in electrical resistance of MOx based gas sensors have been used for the detection of gases such as NH3 in ppb (parts-per-billion) range [6].…”