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Electron emission from individual indium arsenide semiconductor nanowires
Erwin C Heeres1, Erik P A M Bakkers, Aarnoud L Roest
1Condensed Matter Physics/Interface Physics, Leiden Institute of Physics, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands.
Nano Letters
|February 15, 2007
Summary
Researchers developed a method to use indium arsenide nanowires as stable electron field-emission sources. These semiconductor nanowires exhibit consistent emission properties, suggesting potential as advanced electron emitters.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Semiconductor field-emission sources are crucial for various electronic devices.
- Existing semiconductor emitters often suffer from unstable emission and broad energy spread.
- Indium arsenide (InAs) nanowires possess unique electronic properties that may be advantageous for electron emission.
Purpose of the Study:
- To develop a procedure for mounting individual indium arsenide nanowires as electron field-emission sources.
- To characterize the electron emission properties of single indium arsenide nanowires.
- To investigate the stability and energy characteristics of electron emission from these nanowires.
Main Methods:
- Mounting individual indium arsenide nanowires onto tungsten support tips.
- Measuring electron emission patterns, current-voltage curves, and energy spectra.
- Characterizing nanowire morphology using transmission electron microscopy.
Main Results:
- Stable, Fowler-Nordheim-like electron emission behavior was observed.
- A small energy spread of the emitted electron beam was determined.
- Experimentally derived field enhancement factors correlated with calculated values.
- Observed stable emission contrasts with typical unstable semiconductor emitters.
Conclusions:
- Indium arsenide nanowires demonstrate stable and efficient electron field emission.
- The findings support the concept of Fermi-level pinning in indium arsenide nanowires.
- Indium arsenide nanowires show promise as a new class of semiconductor electron sources.
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