Abstract
The high surface-area-to-volume ratio of one-dimensional metal oxide(MOx) nanostructures, can give a substantially greater surface area than two-dimensional MOx thin films, making gas detections more sensitive. So far, 1-D MOx nanostructures of TiO2, ZnO, SnO2, and WO3 have been widely employed for gas sensing. It can detect a variety of gases, including H2, CH4, O2, CO, ethanol, and many more. The large surface area and shape of the one-dimensional MOx nanostructures, on the other hand, can improve gas sensitivity. The greater the sensitivity to gas, the smaller the size of the 1-D MOx nanostructures. The gas detection performance of MOx-based gas sensors is highly dependent on operating temperature as it affects surface kinetics, electron mobility, and conductivity.
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