Title :
Hydrothermal growth and field emission properties of ZnO nanotube arrays
Author :
Li-An Ma ; Guo, Tai-Liang
Author_Institution :
Dept. of Mater. Sci. & Eng., Fujian Univ. of Technol., Fuzhou, China
Abstract :
Highly aligned ZnO nanotube array films on the conducting substrates have been synthesized by a simple hydrothermal method. The as-synthesized ZnO nanotubes have diameters of 300-400nm and lengths of 7μm (the aspect ratios of ~20). The field emission of ZnO nanotube array films shows a turn-on field of about 4.6V/μm at a current density of 1μA/cm and emission current density up to about 0.22mA/cm2 at a bias field of 8.25V/μm. These result suggest that the relatively low the aspect ratios of the ZnO nanotue can posses strong field emission characteristics.
Keywords :
II-VI semiconductors; crystal growth from solution; current density; field emission; nanofabrication; semiconductor growth; semiconductor nanotubes; semiconductor thin films; wide band gap semiconductors; zinc compounds; ZnO; conducting substrates; current density; field emission properties; hydrothermal growth; hydrothermal method; nanotube array films; size 300 nm to 400 nm; strong field emission; Current density; Glass; Indium tin oxide; Scanning electron microscopy; Substrates; Zinc oxide;
Conference_Titel :
Nanotechnology Materials and Devices Conference (NMDC), 2010 IEEE
Conference_Location :
Monterey, CA
Print_ISBN :
978-1-4244-8896-4
DOI :
10.1109/NMDC.2010.5649603
