1. Synthesis, optical and field emission properties of ZnO microhair-clasps
- Author
-
Dejian Shang, Jin Wu, Ke Yu, Jianwen Xu, Ziqiang Zhu, and Yue Xu
- Subjects
Diffraction ,Photoluminescence ,Silicon ,Scanning electron microscope ,Analytical chemistry ,General Physics and Astronomy ,chemistry.chemical_element ,Surfaces and Interfaces ,General Chemistry ,Substrate (electronics) ,Condensed Matter Physics ,Microstructure ,Surfaces, Coatings and Films ,Field electron emission ,chemistry ,Transmission electron microscopy - Abstract
ZnO microhair-clasps were synthesized on silicon substrate by the vapor-phase transport method at the temperature of 900 °C under atmospheric pressure. The microstructure and morphology of ZnO microhair-clasps were evaluated by using X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The growth mechanism of the microhair-clasps was investigated. Room temperature photoluminescence spectra of the microhair-clasps showed a weak UV emission band centering at about 388 nm and wide green emissions around 525 nm. Field emission measurements demonstrated that the microhair-clasps with many sharp tips of several nanometers in curvature radius possessed good performance with a turn-on field of ∼1.5 V/μm and a threshold field of ∼4.3 V/μm.
- Published
- 2009