Non-uniformity in Surface Properties of a Thick Potassium Fluoride Layer-Platinum Substrate System and Influence of the Non-uniformity upon Thermal Positive and Negative Ion Emission

Hiroyuki Kawano

doi:10.5702/massspec1953.26.147

Hiroyuki Kawano

Author information

Keywords: Thermal ion emission, Effective work function, Emitting surface area, Neutral evaporation coefficient, Thick potassium fluoride layer system

JOURNAL FREE ACCESS

1978 Volume 26 Issue 2 Pages 147-158

DOI https://doi.org/10.5702/massspec1953.26.147

Details

Published: June 30, 1978 Received: October 22, 1977 Available on J-STAGE: June 28, 2010 Accepted: - Advance online publication: - Revised: -
Correction information
Date of correction: June 28, 2010 Reason for correction: - Correction: KEYWORD Details: Wrong : Thermal ion emission Effective work function Emitting surface area Neutral evaporation coefficient Thick potassium fluoride layer system
Right : Thermal ion emission, Effective work function, Emitting surface area, Neutral evaporation coefficient, Thick potassium fluoride layer system

Date of correction: June 28, 2010 Reason for correction: - Correction: CITATION Details: Wrong : E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E

Right : H. Kawano, Japan. J. Appl. Phys., Suppl. 2, Part 2, p. 201(1974).
H. Kawano, Mass Spectroscopy Japan, 22, 251(1974). The part “upon a of bulb” on p. 251, line7, left column should read “upon a heated metal surface by means of bulb.”
H. Kawano, ibid., 25, 195(1977). The parts “method, usually” on p. 196, 7lines from bottom, left column and“that thermal ion” on p. 196, 4 lines from bottom, right column should read “method, α⁺;usually” and “that the suppression effect on thermalion”, respectively.
J. P. Hirth, “The Characterization of High-Temperature Vapors”, Ed. by J. L. Margrave, p. 453(1967), John Wiley&Sons, New York.
G. A. Somorjai and J. E. Lester, Progr. Solid State Chem., 4, 1(1968).
M. Eisenstadt, G. M. Rothberg, and P. Kusch, J. Chem. Phys., 29, 797(1958).
D. R. Stull and H. Prophet, “JANAF Thermochemical Tables”, 2nd Ed. (1971). United States Department of Commerce, Washington.
V. I. Vedneyev, L. V. Gurvich, V. N. Kondrat'yev, V. A. Medvedev, and Ye. L. Frankevich, “Bond Energies, Ionization Potentials, and Electron Affinities”(1966), Edward Arnold, London.
D. L. Howlett, J. E. Lester, and G. A. Somorjai, J. Phys. Chem., 75, 4049(1971).
J. C. Riviere, “Work Function: Measurements and Results”, AERE-R 5526(1967), Atomic Energy Research Establishment, Harwell.
F. M. Page and G. C. Goode, “Negative Ions and the Magnetron”(1969), Wiley-Interscience, London.
E. Ya. Zandberg and A. Ya. Tontegode, Sov. Phys. -Tech. Phys,. 10, 1162(1966).
R. H. Wagoner and J. P. Hirth, J. Chem. Phys., 67, 3074(1977).
K. Niwa, J. Chem. Soc. Japan, 59, 637(1938), and J. Fac. Sci. Hokkaido Imp. Univ., Ser. III, 2, 201(1938).
A. C. P. Pugh and R. F. Barrow, Trans. Faraday Soc., 54, 671(1958).
M. S. Chandrasekharaiah, “The Characterization of High-Temperature Vapors”, Ed. by J. L. Margrave, p. 495(1967), John Wiley&Sons, Now York.
G. M. Rothberg, M. Eisenstadt, and P. Kusch, J. Chem. Phys., 30, 517(1959).
C. T. Ewing and K. H. Stern, J. Phys. Chem., 79, 2007(1975).
R. Jaeckel and W. Peperle, Z. Phys. Chem., 217, 321(1961).
J. E. Lester and G. A. Somorjai, J. Chem. Phys., 49, 2940(1968).
C. T. Ewing and K. H. Stern, J. Phys. Chem., 77, 1442(1973).
R. S. Bradley and P. Volans, Proc. Roy. Soc., A217, 508(1953).
0. Knacke, R. Schmolke, and I. N. Stranski, Z. Kristall., 109, 184(1957).

Abstract

The emission of thermal positive ion(K⁺), negative ion(F^-)and of neutral molecules(mainly KF)from a KF-Pt system is investigated as a function of both surfacev temperature(T)and mean sample layer thickness(θ). Thermochemical analysis of the results obtained indicates that K⁺, F^- and KF are emitted from respectively different surface sites(Q(K⁺), Q(F^-)and Q(KF))of the system. The actual surface areas (S(K⁺), S(F^-)and S(KF))for the emission of K⁺, F^-;and KF from the respective sites are found to be quite different from the apparent surface area. S(KF)is strongly dependent upon θ in contrast to S(K⁺). Both S(K⁺)and S(F^-)are estimated to be smaller by a factor of at least10²than. S(KF). The difference in average effective work function between the active sites Q(K⁺)and Q(F^-)is evaluated to be about3eV at θ≅10²molecular layers at T≅700-750°K.

Corresponding author

Correction information

Register with J-STAGE for free!