ABSTRACT
This chapter shows that there is a wide variety of nanostructures that can be used in the design of humidity sensors. These are 0D, 1D, 2D, and 3D structures that include nanowires, nanotubes, nanobelts, nanorods, nanodots, and various hierarchical structures, such as nanospheres, nanowhiskers, nanorings, and core-shell. This chapter contains information related to the features of the fabrication and operation of sensors based on individual 1D structures. The approaches used for synthesis of metal-oxide 1D nanomaterials, as well as limitations of sensor technology based on individual 1D nanostructures, are also considered. It is shown that despite the declared prospects of 1D structures used in humidity sensors, these sensors and their humidity-sensing characteristics are far from perfect.
