Room temperature H2S sensor based on Au modified ZnO nanowires

Role of defects in one-step synthesis of Cu-doped ZnO nano-coatings by electrodeposition method with enhanced magnetic and electrical properties

“…Figure 6a shows a decrease of ~0.1 eV in the work function of Cu-doped ZnO as compared to the [59][60][61]63]. Structural and chemical modification changes the overall charge distribution as well as the work function [59,62]. Work function of Cu is 4.7 eV which is lesser than that of ZnO; therefore, bending in the bands is observed which leads to the creation of an electron accumulation region (Fig.…”

“…The average work function of pure ZnO is 5.13 eV, whereas that of the Cu-doped ZnO is 5.03 eV. Figure 6a shows a decrease of ~0.1 eV in the work function of Cu-doped ZnO as compared to the [59][60][61]63]. Structural and chemical modification changes the overall charge distribution as well as the work function [59,62].…”

“…This region is formed at the Cu/ZnO interface influencing the work function. As ZnO is an n-type material, the shift of Fermi level toward the conduction band shows an [59,60].…”

Ultrasensitive and ultraselective detection of H2S using electrospun CuO-loaded In2O3 nanofiber sensors assisted by pulse heating

“…The response and selectivity to H 2 S were enhanced by the loading of noble-metal catalysts (Pd, Pt, Au, etc.) or by the formation of hetero-nanostructured composites between oxide additives/catalysts and chemiresistive materials [29][30][31]. The ptype CuO is a representative oxide additive to enhance the H 2 S sensing characteristics of n-type oxide semiconductors, such as SnO 2 [32], ZnO [33], WO 3 [34], and MoO 3 [35].…”

A high performance hydrogen sulfide gas sensor based on porous α-Fe2O3 operates at room-temperature

“…As generally reported, the short term (10 min) and long term (8 h) exposure limit of H 2 S has been set to 15 ppm and 10 ppm, respectively. When the concentration reaches over 15 ppm, the human olfactory nerve would be paralyzed and the ability to sense H 2 S declines [1,2], which could result in lethal consequences. Hence, it is urgent to develop a high-performance H 2 S gas sensor with high-efficiency, high-reliability, high sensitivity, low cost, low detection limits, and low operation temperature for environmental protection and personal safety during industrial production process.…”