Heterogeneous nucleation and depletion effect in nanowire growth

Fiqiri Hodaj (1) , Olexii Liashenko (2) , Andriy Gusak (2) , Yuriy Lyashenko (2)

1 SIMaP - Science et Ingénierie des Matériaux et Procédés
2 Cherkasy National University

Recent experiments of Ross, Kodambaka et al. proved possibility of mononuclear regime with heterogeneous nucleation as well as jerky growth in VLS process for silicon nanowires. In this work, theoretical model is presented which incorporates the effects of (i) mononuclear regime with layer by layer growth, (i) heterogeneous nucleation of each new layer at the edge of 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 (non-markovian sequence of waiting periods).

Mots clés: Physical Sciences

Domaines: Matière Condensée [cond-mat]; Matériaux

Fiqiri Hodaj, Olexii Liashenko, Andriy Gusak, Yuriy Lyashenko. Heterogeneous nucleation and depletion effect in nanowire growth. Philosophical Magazine, 2011, 91 (33), pp.4200-4217. ⟨10.1080/14786435.2011.607142⟩. ⟨hal-00728898⟩