Branching induced faceting of Si nanotrees

Doerk, Gregory S.; Radmilovic, Velimir; Maboudian, Roya
March 2010
Applied Physics Letters;3/22/2010, Vol. 96 Issue 12, p123117
Academic Journal
The sidewalls of silicon nanotree trunks grown by the vapor-liquid-solid mechanism with branches seeded by Au surface migration are shown to exhibit strong sawtooth nanofaceting in the region of branching. For Si nanowires grown along the <111> direction, facets found after Au surface migration are identified with the {111} and {113} crystallographic planes. These facets differ from those found on the fully synthesized Si nanotrees, which occur on {111} and {100} planes. We hypothesize that the facets found on the nanotrees are composed of the basal structures of the branches and are induced by branch nucleation.


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