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This paper aims to elucidate the role of interface energy anisotropy inorientation selection during nucleation of new grains in a polycrystalline filmgrowth. An assessment of (heterogeneous) nucleation probability as function oforientation of both the bottom grain and of the nucleus was developed (usingthe concepts of classical nucleation theory). Novel solutions to thegeneralized Winterbottom construction were described in cases of very stronganisotropy and arbitrary orientations. In order to demonstrate the effect onthe film crystallographic texture, a 2D Monte Carlo algorithm for anisotropicpolycrystalline growth was used to simulate growth of films with columnarmicrostructure. The effect of strength of anisotropy, the deposition rate andinitial texture were investigated. Results showed that with larger strength ofanisotropy, the nucleation rate is less dependent on the driving force, butmore dependent on the initial texture. With certain initial textures, theanisotropic nucleation may even be either impossible or having probabilityclose to one irrespective of the driving force. Depending on the conditions,the anisotropic nucleation could hasten the evolution towards theinterface-energy minimizing texture or retard it. Based on these insights, ahypothesis was offered to explain a peculiar texture evolution inelectrodeposited nickel.

Influence of surface energy anisotropy on nucleation and crystallographic texture of polycrystalline deposits