In-situ synthesis of stable ZnO-coated CsPbBr3 nanocrystals for room-temperature heptanal sensors

Cs2AgBiBr6 Quantum Dots Supported on Co3O4 Nanocages for Acetone Detection at Room Temperature

“…In recent years, the combination of MOSs with all-inorganic halide perovskite materials to improve gas-sensing properties has received widespread attention from researchers. Metal halide perovskite nanocrystals (NCs) have excellent photoelectronic properties, including high defect tolerance, tunable band gaps, and high photoluminescence quantum yields, − making them promising candidates for gas-sensitive materials . Liu et al successfully synthesized ZnO-CsPbBr 3 polyhedron derived from ZIF-8 for efficient detection of triethylamine (TEA), showing relatively high response values (∼60 toward 100 ppm of TEA) at 180 °C .…”

“…Metal halide perovskite nanocrystals (NCs) have excellent photoelectronic properties, including high defect tolerance, tunable band gaps, and high photoluminescence quantum yields, 17−19 making them promising candidates for gas-sensitive materials. 20 Liu et al successfully synthesized ZnO-CsPbBr 3 polyhedron derived from ZIF-8 for efficient detection of triethylamine (TEA), showing relatively high response values (∼60 toward 100 ppm of TEA) at 180 °C. 21 Xu et al established an ambiently stable binary heterojunction consisting of CsPbBr 3 NCs and ZnO nanoparticles for detecting ethanolamine (EA).…”

Machine-learning-aided identification of ethanol in humid air using zinc complex capped CsPbBr3 resistive sensors

“…As far as we know, in most cases, PQDs are used as a matrix to improve the gas sensing performance of MOs, graphene, metal-organic framework (MOF) and other main components due to the poor moisture stability of QDs. [18][19][20] Thus, there have been few reports about PQDs as the only material for constructing gas sensors due to their poor stability under a humid air environment. 21 It has been confirmed that both the stability and gas sensitivity of PQDs can be enhanced by depositing a thin shell layer of ZnO or other MOs.…”

“…21 It has been confirmed that both the stability and gas sensitivity of PQDs can be enhanced by depositing a thin shell layer of ZnO or other MOs. 8,18 However, this method requires a relatively high crystallization temperature to ensure the crystallization of MOs, while the formation of heterojunctions via surface coating also increases the QD size, thus lowering the surface activity of PQDs. To address the issue, it was found that the moisture stability of PQDs could be enhanced by modifying with ligands instead of MO shells.…”

“…With the development of artificial intelligence, machine learning shows a broad application prospect in the materials field. 23,24 In a latest report, machine learning was used to identify real breath samples containing heptanal (1-5 ppm) with an 82.5% accuracy rate in simulated breath monitoring measurements, 18 showing an excellent capability for recognizing heptanal in a mixed environment. Besides, with the help of machine learning, Wang et al screened out 13 new sensitive electrode materials for NO 2 gas sensors in a short period of time in a targeted and efficient manner.…”