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Electrochemical Etching and Characterization of Sharp Field Emission Points for Electron Impact Ionization
Published on: July 12, 2016
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Conduction mechanisms and voltage drop during field electron emission from diamond needles
Olivier Torresin1, Mario Borz2, Julien Mauchain1
1Laboratoire Collisions Agrégats Réactivité, Université de Toulouse, UPS, CNRS, France.
Ultramicroscopy
|April 9, 2019
Summary
This study investigates field electron emission from diamond nanoemitters, revealing a voltage drop explained by electrical models. Laser illumination may alter emitter properties and voltage drop.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Surface Science
Background:
- Field electron emission is crucial for vacuum electronic devices.
- Diamond nanoemitters offer unique properties for electron emission applications.
- Understanding emission mechanisms in diamond is essential for optimizing performance.
Purpose of the Study:
- To experimentally investigate field electron emission from single crystal diamond nanoemitters.
- To measure and explain the voltage drop along diamond needles during electron emission.
- To explore the influence of laser illumination on diamond emitter characteristics.
Main Methods:
- Experimental measurements of field electron emission using single crystal diamond needles on tungsten tips.
- Electron energy spectroscopy to determine voltage drop along diamond needles.
- Application of a macroscopic electrical model combining Poole-Frenkel conduction and Fowler-Nordheim tunneling.
Main Results:
- A voltage drop along diamond needles during field electron emission was observed and measured.
- The voltage drop showed a linear dependence on the applied voltage to the tungsten tip.
- Experimental evidence suggests laser illumination affects diamond emitter characteristics and voltage drop.
Conclusions:
- The observed voltage drop can be explained by a model incorporating Poole-Frenkel conduction and Fowler-Nordheim tunneling.
- Laser illumination presents a potential method for tuning diamond nanoemitter performance.
- Further research is needed to fully understand and utilize laser-induced modifications.
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