Review of Recent Advances of GaN Nanowires Based Sensors

Abstract

This paper presents a review of the recent advances of GaN nanowire-based sensors. GaN nanostructures of various forms including nanowires, nanotubes, nanofibers, nanoparticles and nanonetworks have been reported for several sensing applications due to their unique electrical, optical, and structural properties. The nature of GaN materials provides advantages for nanodevices compared to thin films due to its higher surface-to-volume ratio. In addition, GaN materials can absorb ultraviolet radiation which is a key feature in several optical applications. These advantages led to much attention and further study in the applications of GaN. In this paper, the recent advances of GaN sensing applications such as gas sensors, biosensors, and pressure sensors are presented. The performance of these sensors is demonstrated along with the structural, electrical, and optical properties of GaN.