The Work Functions of Copper, Silver and Aluminium

The work functions of surfaces of copper, silver and aluminium, produced by the deposition of thin films of the metal from the vapour on to previously well-aged tungsten surfaces, have been found to be: 4·61 ± 0·04, 4·35 ± 0·05 and 4·25 ± 0·05 eV respectively. These values are based on measurements...

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Bibliographic Details
Published in:Proceedings of the Royal Society of London. Series A, Mathematical and physical sciences Mathematical and physical sciences, 1951-12, Vol.210 (1100), p.70-84
Main Authors: Mitchell, Edgar William John, Mitchell, John Wesley
Format: Article
Language:English
Subjects:
Aluminum
Copper
Electric current
Electrons
Guns
Material films
Silver
Thin films
Tungsten
Work functions
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Summary:The work functions of surfaces of copper, silver and aluminium, produced by the deposition of thin films of the metal from the vapour on to previously well-aged tungsten surfaces, have been found to be: 4·61 ± 0·04, 4·35 ± 0·05 and 4·25 ± 0·05 eV respectively. These values are based on measurements of the contact difference of potential, between these metals and tungsten, which have been made by the retarding potential method. The conditions which have to be satisfied if reliable results are to be obtained with this method are discussed and the construction of an efficient low-velocity electron gun is described.
ISSN:1364-5021
0080-4630
1471-2946
2053-9169
DOI:10.1098/rspa.1951.0231