Electron Transfer at Vacuum-Metal Interface

In summary, the conversation revolves around the concept of Fermi level in materials science and its relation to the acceptance of an electron with a certain energy by a positively charged aluminum plate. The Fermi level is the highest energy of any electrons in a metal and any incoming electrons must have a greater energy than the Fermi level to be accepted. The value of the Fermi level is referenced to an arbitrary point and is measured from the vacuum. The conversation also suggests referring to Ashcroft Mermins book for a deeper understanding of the relationship between Fermi energy and work function.
  • #1
SkiBum326
3
0
Hi Everyone,

Vague Background: an electron with an energy of 0.5 eV is placed in a vacuum, near a positively charged (2 V) aluminum plate.

Is it possible for this electron to be accepted by the plate, given its energy, despite aluminum's Fermi Level of 11.7eV?

There are more specific details, but I don't wan't to alter someone's thought process with too specific of details.

Also, I apologize if this is a rather simple problem; I don't have much experience in materials science.

Kind Regards,

Austin
 
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  • #2
The Fermi level is measured from what reference point of energy?
 
  • #3
Before we get into a deeper discussion, could you clarify something for me?

From what I understand, Fermi level is the highest energy of any electrons in a metal. Since all energy states below the Fermi level are occupied, any incoming electrons must have a greater energy than the Fermi level in order to be accepted into the metal. In addition, the value Fermi level is referenced to is rather arbitrary; it is relation between Fermi levels that is important. Also, work function is the Fermi level referenced to the vacuum (I'm a little vague on this one).

I obtained the value I referenced for the Fermi level from:

http://hyperphysics.phy-astr.gsu.edu/hbase/tables/fermi.html
 
  • #4
SkiBum326 said:
(I'm a little vague on this one).

Yes, that's what I wanted to say. Try to find out how the Fermi energy and the Work function are related. Ashcroft Mermins book is a great source.
 

What is electron transfer at vacuum-metal interface?

Electron transfer at vacuum-metal interface is a process in which electrons are exchanged between a metal surface and the surrounding vacuum. This can occur through different mechanisms, such as thermionic emission or field emission.

Why is electron transfer at vacuum-metal interface important?

Electron transfer at vacuum-metal interface is important in various scientific and technological applications. For example, it plays a crucial role in the operation of vacuum tubes, transistors, and other electronic devices. It also has implications in fields such as surface science, materials science, and catalysis.

What factors affect electron transfer at vacuum-metal interface?

The rate of electron transfer at vacuum-metal interface is affected by several factors, including the work function of the metal, the temperature, the electric field, and the surface morphology. The presence of adsorbates or contaminants on the metal surface can also influence the electron transfer process.

How is electron transfer at vacuum-metal interface studied?

Electron transfer at vacuum-metal interface can be studied using various techniques such as scanning tunneling microscopy, photoemission spectroscopy, and surface potential measurements. These techniques allow scientists to directly observe and measure the transfer of electrons at the interface.

What are the potential applications of understanding electron transfer at vacuum-metal interface?

Understanding electron transfer at vacuum-metal interface has important practical applications, such as improving the efficiency and performance of electronic devices. It can also aid in the development of new materials and technologies for energy production and storage, as well as in the design of more effective catalytic processes.

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