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Growth of ZnO nanorod arrays by hydrothermal method using homo‐seed layers annealed at various temperatures
Author(s) -
Bae Young Sook,
Kim Dong Chan,
Ahn Cheol Hyoun,
Kim Jae Hyun,
Cho Hyung Koun
Publication year - 2010
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.3262
Subject(s) - nanorod , hydrothermal circulation , annealing (glass) , materials science , chemical engineering , nanocrystal , microstructure , nanotechnology , composite material , engineering
Vertically arrayed ZnO nanorods were synthesized by a hydrothermal method on homo‐seed layers deposited using a sol‐gel process and heat‐treated at various temperatures ranging from 400 to 700 °C in air. The effect of the annealing temperatures on nanorod formation was investigated. With increasing temperature, the microstructure of the ZnO seed layers changed from nanocrystals to coarse polycrystals with a preferred orientation, which led to an increase in the length and diameter of the hydrothermally grown nanorods. The ZnO nanorods, based on a solution process, exhibited deep‐level emission in the orange‐red region related with hydroxyl group reactions, while the thermally treated seed layers showed oxygen vacancy‐related emission. Copyright © 2010 John Wiley & Sons, Ltd.