On the role of surface energy in the flattening of a crystal face

• Autorzy: Christo Nanev
• Języki publikacji: EN

Abstrakty

EN

The question addressed in this paper is the flattening of the valley separating two growth hillocks emanating from screw dislocations during crystal growth. It is argued that both thermodynamic and kinetic effects contribute to this result, at least on a quasi-atomic scale. If performed under low enough supersaturation the growth leads to the formation of the face morphology corresponding to the minimum of the surface free energy. Accelerated step annihilation in the valley floor is a universal factor, which favors face flatting under any supersaturation.

Słowa kluczowe

EN

Face morphology   flat crystal faces   surface energy reasons   kinetic factors  

• Czasopismo: Open Chemistry
• Rocznik: 2005
• Tom: 3
• Numer: 1
• Strony: 188-197

Daty

wydano

2005-03-01

online

2005-03-01

Twórcy

autor

Christo Nanev

• Institute of Physical Chemistry, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria,

Bibliografia

• [1] Chr.N. Nanev: “Polyhedral stability-on the growth of flat crystal faces on small molecule and protein crystals”. Cryst. Res. Technol., Vol 39, (2004), pp. 3–10. http://dx.doi.org/10.1002/crat.200310142[Crossref]
• [2] R. Gomer: Field emission and field ionization, Harvard University Press, 1961.
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• [4] N. Cabrera and M. Levine: “On the dislocation theory of crystal evaporation”, Phil. Mag., Vol. 1, (1956), pp. 450–458.
• [5] E.D. Williams: “Surface steps and surface morphology: understanding macroscopic phenomena from atomic observations”, Surface Sci., Vol. 299/300, (1994), pp. 502–524. http://dx.doi.org/10.1016/0039-6028(94)90678-5[Crossref]
• [6] Chr. Naev: “Periodically reversed growth and dissolution of separate faces of silver single crystals”, Electrochem. Acta, Vol. 25, (1980), pp. 1383–1387. http://dx.doi.org/10.1016/0013-4686(80)87153-2[Crossref]
• [7] E. Budevski, G. Staykov and W. Bostanov: “Form and step distance of polygonized growth spirals”, J. Cryst. Growth, Vol. 29, (1975), pp. 316–320. http://dx.doi.org/10.1016/0022-0248(75)90178-5[Crossref]
• [8] A.A. Chernov: “Stability of faceted shapes”, J. Cryst. Growth, Vol. 24/25 (1974), pp. 11–31. http://dx.doi.org/10.1016/0022-0248(74)90277-2[Crossref]
• [9] P.G. Vekilov and Chr. Nanev: “Elementary growth kinetics of silver electrocrystallization”, J. Cryst. Growth, Vol. 125, (1992), pp. 229–236. http://dx.doi.org/10.1016/0022-0248(92)90337-I[Crossref]

Identyfikatory

DOI

10.2478/BF02476249