Yi-Chia Chou, Cheng-Yen Wen, et al.
ACS Nano
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.
Yi-Chia Chou, Cheng-Yen Wen, et al.
ACS Nano
Brent A. Wacaser, Mark C. Reuter, et al.
Nano Letters
K.W. Schwarz, Jerry Tersoff
Nano Letters
Hongsik Park, Ali Afzali, et al.
Nature Nanotechnology