DOI: 10.1063/1.1722081. Work Function of Tungsten Single Crystal Planes Measured by the Field Emission Microscope

Work Function of Tungsten Single Crystal Planes Measured by the Field Emission Microscope

10.1063/1.1722081

Crossref journal-article

AIP Publishing

Journal of Applied Physics (317)

Abstract

The work functions of the low emitting crystallographic planes of tungsten, (011) and (112), are not well known. In previous experiments scattered secondaries and some other disturbing effects covered the small emission particularly of the (011) plane. A method combining the field emission microscope with a probe collector has been applied. The current density in the (011) plane turned out to be 4 to 5 orders of magnitude smaller than in strongly emitting planes. Applying the Fowler-Nordheim theory, φ011 was found between 5.70 and 5.99 ev and φ112 between 4.65 and 4.88 ev depending on the temperature at which the tungsten crystal has been annealed previously. This is not a temperature effect of the work function, but the result of freezing in thermal imperfections of the planes. The work function of the ideal (011) plane appears to be as high as 5.99 ev. The existence of such a high value is further suggested by the ionization of aluminum on a hot polycrystalline tungsten wire, indicating that a part of the surface has a work function as high as the 5.96 ev ionization energy of aluminum.

Bibliography

MÃ¼ller, E. W. (1955). Work Function of Tungsten Single Crystal Planes Measured by the Field Emission Microscope. Journal of Applied Physics, 26(6), 732â737.

Authors 1

Erwin W. Müller (first)

References 21 Referenced 166

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{'key': '2024020120480879200_r3', 'first-page': '173', 'volume': 'A119', 'year': '1928', 'journal-title': 'Proc. Roy. Soc. (London)'} / Proc. Roy. Soc. (London) (1928)
10.1007/BF01342863 / Z. Physik (1937)
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Dates

Type	When
Created	20 years, 3 months ago (April 22, 2005, 11:54 a.m.)
Deposited	1 year, 6 months ago (Feb. 1, 2024, 4:59 p.m.)
Indexed	54 minutes ago (Aug. 21, 2025, 4:32 a.m.)
Issued	70 years, 2 months ago (June 1, 1955)
Published	70 years, 2 months ago (June 1, 1955)
Published Print	70 years, 2 months ago (June 1, 1955)

Funders 0

None

BibTeX

@article{M_ller_1955, title={Work Function of Tungsten Single Crystal Planes Measured by the Field Emission Microscope}, volume={26}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.1722081}, DOI={10.1063/1.1722081}, number={6}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Müller, Erwin W.}, year={1955}, month=jun, pages={732–737} }

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