Journal
NANOTECHNOLOGY
Volume 20, Issue 32, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/20/32/325709
Keywords
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Funding
- National Natural Science Funds [60827004, 60776066]
- Xiamen and Fujian of China
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The existence of characteristic longitudinal optical and transverse optical phonons of cubic ZnO in ZnO nano-tetrapods is determined by Raman spectroscopy and first-principles calculations. Stacking sequence change at the boundary of the core and legs is also identified by high-resolution transmission electron microscopy. Based on this experimental and theoretical evidence, we demonstrate that the lattice structure of ZnO nano-tetrapods is hierarchical with a zinc blende core connecting to four wurtzite legs. Furthermore, we establish the atomic configuration and propose a formation mechanism induced by Laplace pressure in the initial growth stage of ZnO nano-tetrapods.
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