Metal oxide composite-based 1D nanomaterials and its gas-sensing characteristics

Nowadays, the 1-D (one-dimensional) nanostructured metal oxides have received a lot of attention due to their capable use as gas-sensing devices. The hunger for easily transportable, affordable, and effective gas-sensing equipment is on the rise frequently due to the rapid growth of the world's economy for abundant applications, which includes both ecological and monitoring for medicine. With several factors including great crystallinity, simplicity, excellent chemical/ physical characteristics, sensitivity, convenience of synthesis, and affordable cost, nanostructured metal oxides are capable of being employed as active substances for gas sensors to meet the increased demand. One of the challenging parts of fabricating these types of sensors is manipulation and electrical conductivity of the metal oxide nanomaterials. The efficacy of these gas sensors is greatly affected by the morphology and size of the sensing materials. There continues to be plenty of room for upgrading the attributes of a variety of metal oxide composite-based nanomaterials that are outlined by many investigators for use in applications involving gas sensing by improving the rate of response, selection, sensibility, and repeatability. 1-D nanostructured metal oxides are crucial substances for applications in gas sensing owing to their higher specific area of surface, outstanding mechanical characteristics, maximum reactive sites, nanoporosity, and enhanced attributes of the surface (especially stability and uniformity). In this chapter, we touched on the processing and gas-sensing applications for multiple one-dimensional metal oxide nanomaterial-inspired composite materials.