Nanocrystalline WO3-based H2S sensors

Enhanced H2S sensing characteristics of SnO2 nanowires functionalized with CuO

“…Oxide semiconductors such as SnO 2 [1], ZnO [2,3], WO 3 [4][5][6][7], In 2 O 3 [8][9][10], CuO [11], and ␤-FeMoO 4 [12] have been explored to detect trace concentrations of H 2 S. In order to enhance the sensitivity and selectivity to H 2 S further, various functional or catalytic materials were added. The compositionally modified sensing materials include CuO-doped SnO 2 [1,[13][14][15][16][17], Fe-doped SnO 2 [18], Al-doped WO 3 [19], La-doped In 2 O 3 [20], Pt-doped ␣-Fe 2 O 3 [21], and Ag-doped ␣-Fe 2 O 3 [22].…”

Fabrication of Nanocrystalline TiO<sub>2</sub> Thin Film Ammonia Vapor Sensor

“…For this reason metal oxides gained attention for potential application as sensing elements in gas detectors [1]. Between the metal oxides that undergo dramatic changes in their electrical conductivity owing to gas exposure the most analyzed were SnO 2 [2][3][4][5], ZnO [6,7], WO 3 [8,9] and V 2 O 5 [10]. As with several metal oxides, titanium oxide is a polar material of technological importance since it is used as a substrate in catalytical and electrochemical processes [11].…”

Gas-deposited WO 3 nanoparticles studied by scanning force microscopy

“…Recently, nanoparticle films have attracted considerable interest for gas sensing applications. 7 The high surface-to-volume ratio and the increased significance of the surface energy of the nanoparticles may result in agglomeration and/or coagulation of the particles, hereby modifying the nano-and microstructure of the material. Therefore, it is of general interest to study the agglomeration properties of nanoparticles in films.…”