Room-temperature H2S gas sensing at ppb level by single crystal In2O3 whiskers

Transparent Metal Oxide Semiconductors as Gas Sensors

“…As a nanowire it is quite difficult to obtain due to its cubic cell. Probably this is the reason why there are less articles describing its gas sensing application with respect to those on SnO 2 [15,[56][57][58][59][60]. Single nanowires and bundles of In 2 O 3 nanowires were used as gas sensors.…”

“…Kaur et al [59] reported the use of single crystalline whiskers of very large size (100-300 mm in diameter) for H 2 and NO gas sensing at room temperature. Even if the dimension of the wire is huge, which also means high conductance of the wire (current was of the order of 10 ohm), space charge induced by gas adsorption at the surface of the whisker is sufficient to give a response to 200 ppb of H 2 S at room temperature.…”

TiO2 Nanotubes Membrane Flexible Sensor for Low-Temperature H2S Detection

“…Produces damage in breathing system to human and animals. Further, it can cause a malodor-nuisance problem even at relatively low concentrations [7]. H 2 S is an intermediate in the synthesis of organothiol compounds and elemental sulphur.…”

Electrical, structural, and optical properties of sulfurized Sn-doped In2O3 nanowires

“…It has been shown that bulk β-In 2 S 3-3x O 3x has an optical band gap that varies from 2.1 eV in pure β-In 2 S 3 to 2.9 eV when it contains 8.5 at.% of oxygen and has been proposed as an alternative to CdS buffer layers in CuIn x Ga 1-x Se 2 solar cells [12,13]. In addition, the post growth processing of Sn-doped In 2 O 3 NWs under H 2 S at different temperatures is important in understanding their properties and limitations as gas sensors which so far has been considered only up to 250°C [14][15][16].…”