Abstract
This article focuses on the field emission from a small number of zinc oxide (ZnO) nanowires. ZnO nanowires were grown directly on W tips and their field emission was studied in a traditional field emission microscope (FEM). The FEM pattern of a single ZnO nanowire was ring shaped, indicating that most of the emission from the (0001) facets of the ZnO nanowires came from their circumferences. Scanning electron microscopy observation, measurement of dependence of the emission current on the applied cathode voltage (I-V behavior), and acquirement of FEM patterns were performed before and after heat treatment of the samples, respectively. The heat treatment was found to play either a favorable or an unfavorable role. It could lead to a stable emission or damage of the emitters, depending on the heating conditions.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
