Zn(OH)2/ZnO nanosheet-ZnO nanoarray hybrid structured films were fabricated on F-doped SnO2-coated glass by a dissolution–recrystallization route without any additives. The as-deposited c-axis-oriented ZnO nanowhisker films were soaked in hot distilled water for various periods of time. X-ray diffraction, field-emission scanning electron microscopy, and transmission electron microscopy clarified that the dissolution of ZnO induced Zn(OH)2 to grow on the surface of the ZnO nanowhiskers film by heterogeneous nucleation and growth. The morphology of the Zn(OH)2 nanosheets was found to be controllable by the dissolution–recrystallization of as-deposited ZnO nanowhiskers in hot distilled water. ZnO with an almost identical morphology could also be produced by a dehydration reaction. Given the highly porous nature and the strong adsorption properties of the as-fabricated hybrid structured films, it is expected that they will have a variety of potential applications including dye-sensitized gas sensors and solar cells, and photocatalysis systems.
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Document Type: Research Article
Advanced Manufacturing Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimoshidami, Moriyama-ku, Nagoya 436-8560, Japan
Publication date: 2010-03-01