Self-Assembly Ability of Building Units in Mesocrystal, Structural, and Morphological Transitions in Ag Nanostructures Growth

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• 作者：Jixiang Fang ; Bingjun Ding ; Xiaoping Song
• 刊名：Crystal Growth & Design
• 出版年：2008
• 出版时间：October 1, 2008
• 年：2008
• 卷：8
• 期：10
• 页码：3616-3622
• 全文大小：479K
• 年卷期：v.8,no.10(October 1, 2008)
• ISSN：1528-7505

文摘

Multiple morphologies and structures of Ag nanocrystals have been synthesized at a large-scale within a facile and organic-free replacement reaction system. Different morphologies (including nanoplate, dendrite, and nanosphere) in the Ag nanostructure growth have been observed. A continuous transition from single crystal structures to mesocrystals to polycrystalline aggregates can be achieved by simply adjusting the silver ion concentration. The suggested oriented attachment processes contribute to form different crystallographic structures, and the chemical potential of the reaction system provides a driving force for grain rotation and realignment, and the final fusion of attached grains. The existence of the observed structure sequence provides a unique insight into the mechanism of nanoparticle-aggregated crystallization.