Self-Catalysis and Phase Transformation in the Formation of CdSe Nanosaws


  • Thanks to the financial support from the US NSF NIRT ECS-0210332. Thanks to Daniel Moore for calibrating the furnace.


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A wurtzite-structured CdSe nanosaw (see Figure) is formed by a two-step process: a fast-growth process along [01equation image0] creates the main ribbon, while a subsequent side-growth process along [0001] creates the one-sided teeth. The growth of the teeth is suggested to be a combined result of secondary epitaxial nucleation processes resulting from a zinc-blende–wurtzite phase transformation and the self-catalytic effect of the Cd-terminated (0001) surface.