Revealing of Surface Texture by Metal Deposition


ZINC and cadmium atoms are known to exhibit good mobility over, and ready re-evaporability from, a suitable substrate surface on which the metal vapour beam is incident. Thus the vapour – beam flux density must exceed a certain minimum value if deposit is to be formed. This critical flux density depends on the nature of the substrate1–3 and should therefore vary from place to place on the always more or less imperfect surface of a crystal. Provided the corresponding changes in the critical flux density are sufficiently large, it should thus be possible to make visible such imperfections.

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  1. 1

    Estermann, J., Z. phys., 33, 340 (1925).

  2. 2

    Cockcroft, J. D., Proc. Roy. Soc., A, 119, 293 (1928).

  3. 3

    Déo, A. R., and Gharpurey, M. K., J. Sci. Indust. Res., India (in the press).

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GURU MOORTI, V., GHARPUREY, M. Revealing of Surface Texture by Metal Deposition. Nature 179, 529 (1957).

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