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An Analytical Modeling of Field Electron Emission for a Vertical Wedged Ordered Nanostructure
- Source :
- Advanced Electronic Materials. 3:1700295
- Publication Year :
- 2017
- Publisher :
- Wiley, 2017.
-
Abstract
- The development of field electron emission materials requires purposeful analytical modeling of structural features. A vertical wedged ordered nanostructure shows better field emission current density because of its in-plane continuity at the top emission edge: Individually, its calculated average current density can be 8.3–26.7 times larger than a tapered nanostructure when its bottom area s increases from 0.5 to 2.5 µm2, can be 2.2–12.7 times as its radius of top curvature r decreases from 65 to 5 nm, and can be 7.3–17.3 times as its length L increases from 0.5 to 5 µm. For an ordered nanostructure array, its average current density can be about 160 times larger than the a reference tapered array when the individual elements are closely aligned. Over three orders of magnitude improvment can be observed when optimal emitter spacing conditions are used. Structural analytical models and numerical simulation prove to be in good correspondence with previously reported experimental data, and may serve as a guide for the design and preparation of field electron emission materials with a clear purpose in the future.
- Subjects :
- 010302 applied physics
Nanostructure
Materials science
Computer simulation
business.industry
02 engineering and technology
Radius
Edge (geometry)
021001 nanoscience & nanotechnology
Curvature
01 natural sciences
Molecular physics
Electronic, Optical and Magnetic Materials
Field electron emission
Optics
Orders of magnitude (time)
0103 physical sciences
0210 nano-technology
business
Common emitter
Subjects
Details
- ISSN :
- 2199160X
- Volume :
- 3
- Database :
- OpenAIRE
- Journal :
- Advanced Electronic Materials
- Accession number :
- edsair.doi...........b1653843938887b2a320d2063ceaaf66
- Full Text :
- https://doi.org/10.1002/aelm.201700295