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Jumping-catalyst dynamics in nanowire growth

Schwarz, K W ; Tersoff, J ; Kodambaka, S ; Ross, F M

Physical review letters, 2014-08, Vol.113 (5), p.055501-055501, Article 055501 [Periódico revisado por pares]

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Título:
Jumping-catalyst dynamics in nanowire growth
Autor: Schwarz, K W ; Tersoff, J ; Kodambaka, S ; Ross, F M
Assuntos: Catalysts ; Computer simulation ; Crystals ; Droplets ; Kinking ; Microscopy ; Nanowires ; Wire
É parte de: Physical review letters, 2014-08, Vol.113 (5), p.055501-055501, Article 055501
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: Nanowire growth is generally considered a steady-state process, but oscillatory phenomena are known to often play a fundamental role. Here we identify a natural sequence of distinct growth modes, in two of which the catalyst droplet jumps periodically on and off a crystal facet. The oscillatory modes result from a mismatch between catalyst size and wire diameter; they enable growth of straight smooth-sided wires even when the droplet is too small to span the wire tip. Jumping-catalyst growth modes are seen both in computer simulations of vapor-liquid-solid growth, and in movies of Si nanowire growth obtained by in situ microscopy. Our simulations also provide new insight into nanowire kinking.
Editor: United States
Idioma: Inglês

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