FIELD EMISSION Meaning and
Definition
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Field emission is a phenomenon in which electrons are emitted from a material's surface under the influence of a strong electric field. It occurs when an exceptionally high electric field is applied to a solid, causing electrons to overcome the potential energy barrier that normally impedes their escape into a vacuum.
In the context of physics and electronics, field emission typically refers to electron emission from a sharp or pointed surface, such as a nanotip or a sharp edge. The electric field at the tip of the surface is intensified, allowing the electrons to tunnel through the potential barrier and be emitted into the surrounding vacuum. Field emission is enhanced by factors such as sharpness of the surface and the strength of the applied electric field.
This phenomenon has significant applications in electronic devices, especially in electron microscopy and display technologies. For instance, it plays a crucial role in the operation of field emission displays (FEDs), where extremely small and bright pixels are generated by controlling electron emission from a multitude of nanoscale emitters. Furthermore, field emission microscopy relies on the detection and analysis of electrons emitted from a sharp nanotip to provide high-resolution imaging of surfaces.
Field emission is a fascinating area of study that explores the fundamental principles governing electron emission at high electric field strengths. By understanding and harnessing these mechanisms, researchers continue to develop new and improved technologies in various fields like imaging, lighting, and electronics.
Common Misspellings for FIELD EMISSION
- dield emission
- cield emission
- vield emission
- gield emission
- tield emission
- rield emission
- fueld emission
- fjeld emission
- fkeld emission
- foeld emission
- f9eld emission
- f8eld emission
- fiwld emission
- fisld emission
- fidld emission
- firld emission
- fi4ld emission
- fi3ld emission
- fiekd emission
Etymology of FIELD EMISSION
The word "field emission" is derived from the combination of two terms: "field" and "emission".
The term "field" refers to the presence of an electric field, which is a region of space surrounding an electrically charged object where another charged object experiences a force. In the context of field emission, this refers to the electric field that is used to induce the emission of electrons from a material.
The term "emission" describes the act of releasing or emitting something. In the case of field emission, it specifically refers to the emission of electrons from a solid material into vacuum or low-pressure environments.
Therefore, "field emission" refers to the phenomenon where electrons are emitted from a material in the presence of an electric field.
Similar spelling word for FIELD EMISSION
- field-emission microscope.
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