Enhanced performance of thermal-assisted electron field emission based on barium oxide nanowire
| Autor: | Yuning Zhang, Wei Lei, Yunkang Cui, Yunsong Di, Jing Chen, Zichen Zhang, Xiaobing Zhang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Barium oxide Scanning electron microscope Nanowire Analytical chemistry General Physics and Astronomy 02 engineering and technology Surfaces and Interfaces General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Field electron emission chemistry.chemical_compound Electron diffraction chemistry Transmission electron microscopy Work function 0210 nano-technology High-resolution transmission electron microscopy |
| Zdroj: | Applied Surface Science. 396:1108-1112 |
| ISSN: | 0169-4332 |
| Popis: | In this paper, thermal-assisted field emission properties of barium oxide (BaO) nanowire synthesized by a chemical bath deposition method were investigated. The morphology and composition of BaO nanowire were characterized by field emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SED), X-ray diffraction (XRD), and energy dispersive X-ray spectrometer (EDX) respectively. The turn-on field, threshold field and the emission current density could be affected relatively due to the thermal-assisted effect when the electric field was applied, in the meanwhile, the turn-on field for BaO nanowire was measured to be decreased from 1.12 V/μm to 0.66 V/μm when the temperature was raised from 293 K to 593 K, whereas for the threshold field was found to decrease from 3.64 V/μm to 2.12 V/μm. The improved performance was demonstrated due to the reduced work function of the BaO nanowire as the agitation temperature increasing, leading to the higher probability of electrons tunneling through the energy barrier and enhancement of the field emission properties of BaO emitters. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect