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Controlled growth of ZnO torch‐like nanostructure arrays
Author(s) -
Xiao Jing,
Zhang Wei,
Wu Yue,
Sun Hui
Publication year - 2008
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200811128
Subject(s) - nanostructure , materials science , morphology (biology) , nanotechnology , hexagonal crystal system , evaporation , chemical engineering , crystal growth , single crystal , crystal (programming language) , substrate (aquarium) , chemistry , crystallography , programming language , genetics , physics , oceanography , geology , computer science , engineering , biology , thermodynamics
Single‐crystal ZnO torch‐like nanostructure arrays were synthesized using a simple two‐step pressure controlled thermal evaporation method without any catalyst. The nanostructures had a hierarchical morphology, with well‐hexagonal faceted holders and needle‐like flames on them. The diameter of each single flame was about 20–40nm at the base and 10nm at the tip. Both the holders and flames were found to grow along the [0001] direction. The morphology of the structures could be effectively controlled by varying the growth temperature and vacuum pressure. The experimental results and analysis provided easy strategies to control the morphology of nanostructures and also enhanced the understanding of the growth mechanism. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)