On-chip grown ZnO nanosheet-array with interconnected nanojunction interfaces for enhanced optoelectronic NO2 gas sensing at room temperature

Low-temperature operating ZnO-based NO2 sensors: a review

“…Meantime, Wang et al controlled the growth of ZnO nanosheet arrays with abundant nanojunctions on exible substrates by using a water bath method. 133 The SEM image reveals that the interconnected and vertically arranged nanosheets with a length/thickness of 200-500 nm and a thickness of 40-50 nm are uniformly grown on the substrate. The nitrogen adsorption analysis indicated a BET surface area of 56 m 2 g À1 and a hollow structure.…”

Fully Integrated Indium Gallium Zinc Oxide NO2 Gas Detector

“…In particular, SMO gas sensors are shown to fulfill most of the criteria for gas sensing applications . Many efforts are being made to enhance the sensitivity and selectivity of these sensors by exploring metal oxide nanoparticles, nanocomposites, nanostructures, and metal–organic frameworks, − thereby increasing the surface-to-volume ratio and the number of reactive sites to enhance gas diffusion. Although many gas and vapor sensors based on nanomaterials have been reported, implementing them in the system for real-time applications is a great challenge because of mass production and reproducibility issues.…”

Metformin‐Templated Nanoporous ZnO and Covalent Organic Framework Heterojunction Photoanode for Photoelectrochemical Water Oxidation

“…This NZO‐1A is essentially the intermediate stage during the formation of the crystalline triclinic phase in NZO‐1. As seen from Figures 6a and b, nanosheet like ZnO nanostructures [58] undergoes folding at several places of the specimen. Folding of the ZnO nanosheets facilitated upon prolonged hydrothermal treatment leading to final nanorod formation after 72 h reaction time.…”

“…Further, a strong emission at 559 nm (much stronger than bulk ZnO) was observed. This peak was little red‐shifted compared to the bulk phase and it could be attributed to the intrinsic ionized oxygen deficiency site and antisite zinc [58] in the porous ZnO nanorods. The greater intensity of emission denotes a greater number of defect sites at the surface for porous NZO‐1 compared to bulk wurtzite phase and this is very important for optoelectronic, energy harvesting and sensing applications.…”

“…The presence of the peaks corresponding to wurzite phase in the PXRD pattern of NZO-1A ( Figure 1B, top) along with the newly formed phase helps us to get some insight about the [58] undergoes folding at several places of the specimen. Folding of the ZnO nanosheets facilitated upon prolonged hydrothermal treatment leading to final nanorod formation after 72 h reaction time.…”