Work function: Difference between revisions

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The Kelvin probe technique can be used to obtain work function maps of a surface with extremely high spatial resolution, by using a sharp tip for the probe (see [[Kelvin probe force microscope]]).

== Work functions of elements<ref>CRC Handbook of Chemistry and Physics version 2008, p.&nbsp;12–114.</ref> ==

Note that theThe work function depends on the configurations of atoms at the surface of the material. For example, on polycrystalline silver the work function is 4.26 eV, but on silver crystals it varies for different crystal faces as [[Miller index|(100) face]]: 4.64 eV, [[Miller index|(110) face]]: 4.52 eV, [[Miller index|(111) face]]: 4.74 eV.<ref>{{Cite journal | last1 = Dweydari | first1 = A. W. | last2 = Mee | first2 = C. H. B. | doi = 10.1002/pssa.2210270126 | title = Work function measurements on (100) and (110) surfaces of silver | journal = Physica Status Solidi A | volume = 27 | issue = 1 | pages = 223 | year = 1975 | pmid = | pmc = |bibcode = 1975PSSAR..27..223D }}</ref> Ranges for typical surfaces are shown in the table below.<ref>CRC Handbook of Chemistry and Physics version 2008, p.&nbsp;12–114.</ref>

Below is a table of work function values for various elements.

Note that the work function depends on the configurations of atoms at the surface of the material. For example, on polycrystalline silver the work function is 4.26 eV, but on silver crystals it varies for different crystal faces as [[Miller index|(100) face]]: 4.64 eV, [[Miller index|(110) face]]: 4.52 eV, [[Miller index|(111) face]]: 4.74 eV.<ref>{{Cite journal | last1 = Dweydari | first1 = A. W. | last2 = Mee | first2 = C. H. B. | doi = 10.1002/pssa.2210270126 | title = Work function measurements on (100) and (110) surfaces of silver | journal = Physica Status Solidi A | volume = 27 | issue = 1 | pages = 223 | year = 1975 | pmid = | pmc = |bibcode = 1975PSSAR..27..223D }}</ref> Ranges for typical surfaces are shown in the table below.

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