Growth of Oriented Zinc Oxide Nanowire Array into Novel Hierarchical Structures in Aqueous Solutions

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• 作者：Hongxing Li ; Mingxia Xia ; Guozhang Dai ; Hongchun Yu ; Qinglin Zhang ; Anlian Pan ; Taihong Wang ; Yanguo Wang ; Bingsuo Zou
• 刊名：Journal of Physical Chemistry C
• 出版年：2008
• 出版时间：November 13, 2008
• 年：2008
• 卷：112
• 期：45
• 页码：17546-17553
• 全文大小：406K
• 年卷期：v.112,no.45(November 13, 2008)
• ISSN：1932-7455

文摘

The strategy to manipulate nanoscale building blocks into well-regulated hierarchical architectures is of great interest and valuable to both material synthesis and advanced nanodevices. Novel ZnO hierarchical structures with nanowire arrays connected on both faces of parallel ZnO hexagonal disks were produced in a facile temperature-dependent multi-step hydrothermal route within an open vessel, in which lamellar zinc hydroxide (LHS-Zn) disks were firstly formed as intermediate basic floor, whose surface may be roughened at elevated temperature; the resultant ZnO nanowires were then assembled into a highly ordered array on the top/bottom surfaces of disks in the presence of dense ammonia. Higher [Zn²⁺] at the beginning lead to multicell sandwiches or nanowire−disk−nanowire−disk−nanowire-like superlattice. Ammonia molecules in the vessel play a key role in controlling architecture evolution. Room-temperature Raman-scattering and photoluminescence measurements indicated the optical properties of single as-prepared ZnO structure.