Abstract
Wurtzite ZnO nano-pyramids grown by evaporation-deposition methods have been characterized using advanced electron microscopy. The basal and pyramidal planes of the nano-pyramids were identified as (0001) polar and $$ \{ 20\bar{2}1\} $$ semi-polar surfaces, respectively. The $$ \{ 20\bar{2}1\} $$ semi-polar surfaces were further faceted into $$ \{ 10\bar{1}1\} $$ semi-polar and $$ \{ 10\bar{1}0\} $$ non-polar surfaces. Surface area calculations revealed that approximately 65 % of the total surfaces of the as-grown nanostructures consisted of polar or semi-polar surfaces.
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