Heterogeneous nucleation and depletion effect in nanowire growth

Hodaj, F., Liashenko, O. Yu., Gusak, A. M., Lyashenko, Yu. A. (2011) Heterogeneous nucleation and depletion effect in nanowire growth. Philosophical Magazine. с. 1-18.

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Recent experiments by Ross and co-workers proved the possibility of a mononuclear regime with heterogeneous nucleation as well as jerky growth in the vapor–liquid–solid (VLS) process for silicon nanowires. In this work, a theoretical model is presented which incorporates the effects of (i) a mononuclear regime with layer by layer growth, (i) heterogeneous nucleation of each new layer at the edge of a Au–Si droplet, (iii) drop of supersaturation after each successful nucleation and respective fast layer growth, (iv) time-dependent nucleation barrier during each new waiting period and (v) correlation between subsequent waiting periods (nonMarkovian sequence of waiting periods).

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