Influence of Droplet Size on the Growth of Self-Catalyzed Ternary GaAsP Nanowires

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• 作者：Yunyan Zhang ; Ana M. Sanchez ; Yue Sun ; Jiang Wu ; Martin Aagesen ; Suguo Huo ; Dongyoung Kim ; Pamela Jurczak ; Xiulai Xu ; Huiyun Liu
• 刊名：Nano Letters
• 出版年：2016
• 出版时间：February 10, 2016
• 年：2016
• 卷：16
• 期：2
• 页码：1237-1243
• 全文大小：617K
• ISSN：1530-6992

文摘

The influences of droplet size on the growth of self-catalyzed ternary nanowires (NWs) were studied using GaAsP NWs. The size-induced Gibbs–Thomson (GT) effect makes the smaller catalytic droplets have lower effective supersaturations and hence slower nucleation rates than the larger ones. Large variation in droplet size thus led to the growth of NWs with low uniformity, while a good size uniformity of droplets resulted in the production of highly uniform NWs. Moreover, thinner NWs were observed to be richer in P, indicating that P is more resistant to the GT effect than As because of a higher chemical potential inside Ga droplets. These results provide useful information for understanding the mechanisms of self-catalyzed III–V NW nucleation and growth with the important ternary III–V material systems.