The Theoretical and Technical Development of Field-Ion Microscopy

  • E. W. Müller

Abstract

A field-ion microscope is the most powerful microscopic device known today. It is the only instrument that can show directly the atomic structure of a specimen and the atomic lattice defects. But, for reasons that might lie in the difficulty of operation of the first instruments, perhaps the unorthodoxy of the principles involved, and a justified lack of commercial interest, it took a long time to be developed. When in the spring days of quantum mechanics Gamow1 (1928) explained the radioactive alpha decay as a tunneling effect, field-electron emission from metals was soon recognized by Fowler and Nordheim2 as another example of barrier penetration and simultaneously Oppenheimer3 suggested that the effect of field ionization of free atoms could occur when an electron would tunnel out in the presence of an electric field. While the first two effects commanded considerable interest, field ionization from the ground state of an atom was experimentally inaccessible because of the magnitude of the fields required. Handling large fields became a possibility with the introduction of the field-emission microscope in 1936.4 With the discovery of field desorption5 from a positive-point electrode the field range beyond 100 MV/cm, in which all effects of interest to us are taking place, was entered for the first time. The realization that the resolution limit of the field-electron microscope6 is determined by the tangential velocity of the emitted electrons and, to a lesser extent, by their de Broglie wavelength, which cannot be controlled under the prevailing conditions, led in 1951 to successful imaging of the emitter surface with positive ions rather than electrons.7 Atomic resolution was thus achieved for the first time.

Keywords

Fatigue Migration Helium Deuterium Neon 

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References

  1. 1.
    G. Gamow, Z. Physik 51: 204 (1928).CrossRefGoogle Scholar
  2. 2.
    R. H. Fowler and L. Nordheim, Proc. Roy Soc. (London) A119: 173 (1928).CrossRefGoogle Scholar
  3. 3.
    J. R. Oppenheimer, Phys. Rev. 31: 67 (1928).Google Scholar
  4. 4.
    E. W. Müller, Z. Physik 106: 541 (1937).CrossRefGoogle Scholar
  5. 5.
    E. W. Müller, Naturwissenschaften 29: 533 (1941).CrossRefGoogle Scholar
  6. 6.
    E. W. Müller, Z. Physik 120: 270 (1943).CrossRefGoogle Scholar
  7. 7.
    E. W. Müller, Z. Physik 131: 136 (1951).CrossRefGoogle Scholar
  8. 8.
    E. W. Müller, Z. Naturforsch. 11a: 87 (1956); also J. Appl. Phys. 27: 474 (1956).Google Scholar
  9. 9.
    E. W. Müller, Phys Rev. 102: 618 (1956).CrossRefGoogle Scholar
  10. 10.
    E. W. Müller, J. Appl. Phys. 28: 1 (1957).CrossRefGoogle Scholar
  11. 11.
    E. W. Müller, Advances in Electronics and Electron Physics, Vol. XIII, Academic Press (New York), 1960, pp. 83–179.Google Scholar
  12. 12.
    R. Gomer, Field Emission and Field Ionization, Harvard University Press (Cambridge, Mass.), 1961.Google Scholar
  13. 13.
    M. J. Southon, Thesis, Cambridge, England, 1963.Google Scholar
  14. 14.
    D. G. Brandon, Surface Sci. 3: 1 (1965).Google Scholar
  15. 15.
    E. W. Müller, Surface Sci. 2: 484 (1964).CrossRefGoogle Scholar
  16. 16.
    M. G. Inghram and R. Gomer, J. Chem. Phys. 22: 1279 (1954).CrossRefGoogle Scholar
  17. 17.
    E. W. Müller and K. Bahadur, Phys. Rev. 102: 624 (1956).CrossRefGoogle Scholar
  18. 18.
    E. W. Müller, Proc. 4th Intern. Conf. Electron Microscopy, Berlin, 1958, Vol. 1, Springer (Berlin), 1960, p. 820.Google Scholar
  19. 19.
    E. W. Müller, Ann. d. Physik 20 [6]: 316 (1957).Google Scholar
  20. 20.
    E. W. Müller, Z. Physik 156: 399 (1959).CrossRefGoogle Scholar
  21. 21.
    E. W. Müller, Acta Met. 6: 620 (1958).CrossRefGoogle Scholar
  22. 22.
    S. B. McLane, E. W. Müller, and O. Nishikawa, Rev. Sci. Instr. 35: 1297 (1964).CrossRefGoogle Scholar
  23. 23.
    E. W. Müller, S. Nakamura, O. Nishikawa, and S. B. McLane, J. Appl. Phys. 36: 2496 (1965).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1968

Authors and Affiliations

  • E. W. Müller
    • 1
  1. 1.The Pennsylvania State UniversityUniversity ParkUSA

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