Low-temperature hydrothermal synthesis single-crystal ZnO nanowire for gas sensor application

Characterization and ohmic contact of hydrothermally synthesized vertical ZnO and Ag/ZnO nanowires

“…The preparation routes of ZnO mainly include the following three types of methods: vapor-phase method (sputtering, vacuum evaporation, ion-body CVD and vapor-phase thermal decomposition, etc), solid-phase method (mechanical grinding, crushing method and solid-phase reaction method, etc) and liquid-phase method (deposition, sol-gel method, template method and hydrothermal method, etc.) [3]. Among the above methods, the vapor-phase deposition method can change the morphology and size of ZnO structure by changing the heating temperature and reaction time, and synthesizes the advantages of good dispersion of crystals, narrow particle size distribution, consistent orientation and good denseness.…”

Hollow ZnO nanorices prepared by a simple hydrothermal method for NO2 and SO2 gas sensors

“…[18][19][20] As a typical n-type semiconductor, ZnO with a wide bandgap ($3.37 eV), 21 has been proven to be suitable for gas sensor applications 22,23 because of its low cost and capability to detect several toxic gases, including of NO 2 , 24 SO 2 , 25 CO, 26 and NH 3 . 27 In recent years, ZnO nanostructures with different morphologies, such as nanoparticles, 28 nanowires, 29 nanoplates, 30 nanobelts, 31 and nanorods, 32 have been synthesized for gas sensors. For instance, Vanalakar et al 33 fabricated ZnO nanorods for the detection of NO 2 gases with a concentration ranging from 20 ppm to 100 ppm.…”

Enhanced Hydrogen Detection in ppb-Level by Electrospun SnO2-Loaded ZnO Nanofibers

“…Among them, ZnO-based gas sensors are highly attentive due to having high sensitivity, high stability, easy synthesis methods and a low-cost [15]. In particular, one-dimensional (1D) morphologies of ZnO, like nanorods [16], nanowires [17], and nanofibers (NFs) [18], have gained special attention, mostly due to their simple synthesis methods and larger surface area relative to thin and thick film counterparts. ZnO NFs are among the simplest morphology of ZnO.…”