| Autor: |
Wen, C-Y, Tersoff, J., Hillerich, K., Reuter, M.C., Park, J. H., Kodambaka, S., Stach, Eric, Ross, F.M. |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
Birck and NCN Publications |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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