title: Hierarchical ZnO nanostructures with blooming flowers driven by screw dislocations.
abstract: Hierarchical ZnO nanostructures with a large yield were fabricated by a simple thermal evaporation method. For the first time, novel ZnO flowers were observed blooming at certain sites of a variety of spines, identified as Zn-terminated polar (0001) planes or tips. The spines for as-synthesized hierarchical structures can be nanowires, nanobelts, nanodendrites, nanobrushes, etc. This growth phenomenon determines the key role of polar sites in the fabrication of hierarchical structures. The spiral feature of ZnO flowers indicates an unusual screw dislocation driven growth mechanism, which is attributed to a high concentration of Zn vapor.
authors: Department of Materials Science and Engineering and Shenzhen Key Laboratory of Nanoimprint Technology, South University of Science and Technology, Shenzhen, 518055, China.
authors: Chengzi
authors: C
authors: Huang
authors: Department of Materials Science and Engineering and Shenzhen Key Laboratory of Nanoimprint Technology, South University of Science and Technology, Shenzhen, 518055, China.
authors: Run
authors: R
authors: Shi
authors: School of Computing, Engineering and Mathematics, University of Western Sydney, Kingswood, NSW 2751, Australia.
authors: Abbas
authors: A
authors: Amini
authors: Department of Physics, Hong Kong University of Science and Technology, Hong Kong, China.
authors: Zefei
authors: Z
authors: Wu
authors: Department of Physics, Hong Kong University of Science and Technology, Hong Kong, China.
authors: Shuigang
authors: S
authors: Xu
authors: Department of Materials Science and Engineering and Shenzhen Key Laboratory of Nanoimprint Technology, South University of Science and Technology, Shenzhen, 518055, China.
authors: Linfei
authors: L
authors: Zhang
authors: Department of Materials Science and Engineering and Shenzhen Key Laboratory of Nanoimprint Technology, South University of Science and Technology, Shenzhen, 518055, China.
authors: Wei
authors: W
authors: Cao
authors: Department of Materials Science and Engineering and Shenzhen Key Laboratory of Nanoimprint Technology, South University of Science and Technology, Shenzhen, 518055, China.
authors: Jiangwei
authors: J
authors: Feng
authors: Wuhan National Laboratory for Optoelectronics and the School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China.
authors: Haisheng
authors: H
authors: Song
authors: State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, China.
authors: Yantao
authors: Y
authors: Shi
authors: Department of Physics, Hong Kong University of Science and Technology, Hong Kong, China.
authors: Ning
authors: N
authors: Wang
authors: Department of Materials Science and Engineering and Shenzhen Key Laboratory of Nanoimprint Technology, South University of Science and Technology, Shenzhen, 518055, China.
authors: Chun
authors: C
authors: Cheng
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