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Article Dans Une Revue Applied Physics Letters Année : 2011

Stability and evolution of low-surface-tension metal catalyzed growth of silicon nanowires

Résumé

Low-surface-tension metals were predicted to be insufficient to catalyze the growth of silicon nanowires (SiNWs) in vapor-liquid-solid (VLS) mode while counter examples do exist, for example, in the tin-or indium-catalyzed SiNWs. This puzzle remains largely unresolved. We first examine the local tension-force-balance in a tin-catalyzed SiNW by using a cross-section analysis. We found that the existence of an ultrathin sidewall-spreading catalyst layer helps to stabilize the catalyst drop during growth. The predicted contact-angle evolution, by an energetic balance model, is also supported by the experimental data. These results bring critical understanding on the low-surface-tension catalyzed VLS process
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Dates et versions

in2p3-00596147 , version 1 (26-05-2011)

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L.W Yu, F. Fortuna, B. O'Donnell, G. Patriache, Pere Roca I Cabarrocas. Stability and evolution of low-surface-tension metal catalyzed growth of silicon nanowires. Applied Physics Letters, 2011, 98, pp.123113. ⟨10.1063/1.3569817⟩. ⟨in2p3-00596147⟩
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