A Microscopic View of Repeated Polytypism in Self-organization of Hierarchical Nanostructures

ORAL

Abstract

We demonstrate that the stacking-fault-induced repeated polytypism of wurtzite (WZ) and zinc-blend (ZB) phases may lead to a hierarchical nanostructure of ZnO possessing a hexagonal central trunk decorated with thin blades. Each blade keeps a fixed angle to the central trunk, resembling propellers with seemingly six-fold symmetry. The blades epitaxially nucleate on the ZB stripe assisted by the defect-induced reentrant corners at the interface of ZB-WZ phases. Our experiments reveal a unique approach to assemble hierarchical nanostructures, and the mechanism could be general to many materials.

*the project supported by MOST and NSF of China

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Authors

  • Mu Wang

    • Nanjing University
    • Natl. Lab. Solid State Microstructures, Nanjing University, China
    • Shool of Physics, Nanjing University

  • Ming LIu

    • Natl. Lab. Solid State Microstructures, Nanjing University, China

  • Guo-Bin Ma

    • National Laboratory of Solid State Microstructures, and Department of Physics, Nanjing University, Nanjing 210093, China
    • Natl. Lab. Solid State Microstructures, Nanjing University, China

  • Zhao-Wu Wang

    • Natl. Lab. Solid State Microstructures, Nanjing University, China

  • Ru-Wen Peng

    • National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
    • Nanjing University
    • Natl. Lab. Solid State Microstructures, Nanjing University, China