Fabrication of Flower-Like Silver Structures through Anisotropic Growth

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• 作者：Tao Liu ; Dongsheng Li ; Deren Yang ; Minhua Jiang
• 刊名：Langmuir
• 出版年：2011
• 出版时间：May 17, 2011
• 年：2011
• 卷：27
• 期：10
• 页码：6211-6217
• 全文大小：967K
• 年卷期：v.27,no.10(May 17, 2011)
• ISSN：1520-5827

文摘

Using a simple chemical reaction, a new nanostructure of silver, which we call a 鈥渇lower-like silver structure鈥? is produced. The flower-like silver structure consists of a silver core and many rod-like tips protruding out in three dimensions. Besides common face-centered-cubic (FCC) phase of silver, there exists hexagonal-close-packed (HCP) phase in these tips. The appearance of HCP silver is the result of rapid growth of silver nuclei when using CH₂O or C₂H₄O as the reducing agent. The formation of the rod-like tips is caused by the anisotropic growth determined by the HCP phase and the directing role of formic acid, which is the oxidation product of CH₂O. It is also found that the concentration of reactants, the kind of reducing agents and the sequence of adding reactants can influence the morphology and phase constitution of the final products.