Shuai-Hua Ji, James B. Hannon, et al.
Nature Materials
Nanowire growth in the standard 111 direction is assumed to occur at a planar catalyst-nanowire interface, but recent reports contradict this picture. Here we show that a nonplanar growth interface is, in fact, a general phenomenon. Both III-V and group IV nanowires show a distinct region at the trijunction with a different orientation whose size oscillates during growth, synchronized with step flow. We develop an explicit model for this structure that agrees well with experiment and shows that the oscillations provide a direct visualization of catalyst supersaturation. We discuss the implications for wire growth and structure. © 2011 American Physical Society.
Shuai-Hua Ji, James B. Hannon, et al.
Nature Materials
Yi-Chia Chou, Cheng-Yen Wen, et al.
ECS Transactions
Aaron D. Franklin, Siyuranga O. Koswatta, et al.
Nano Letters
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Physical Review Letters