Aqueous‐Phase Synthesis of Single‐Crystal Pd Seeds 3 nm in Diameter and Their Use for the Growth of Pd Nanocrystals with Different Shapes |
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| Authors: | Cun Zhu Prof Jie Zeng Dr Ping Lu Prof Jingyue Liu Prof Zhongze Gu Prof Younan Xia |
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| Institution: | 1. The Wallace H. Coulter Department of Biomedical Engineering, School of Chemistry & Biochemistry and School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332 (USA), Fax: (+1)?404‐385‐3209;2. State Key Laboratory of Bioelectronics, School of Chemistry and Chemical Engineering, Southeast University, Nanjing, Jiangsu 210096 (P.R. China);3. Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026 (P.R. China);4. Department of Physics, Arizona State University, Tempe, Arizona 85287 (USA) |
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| Abstract: | This article describes an aqueous method for the synthesis of Pd seeds with a single‐crystal structure and a uniform diameter of 3 nm and their use for the growth of Pd nanocrystals with a variety of shapes. We have also investigated the effects of a number of parameters, including the temperature, reducing power of the reductant, and capping agent on the reduction rate of a Pd precursor, and thus the final size, size distribution, and morphology of the Pd seeds. By taking advantage of the coordination effect of Br? ions with Pd2+ ions and their selective adsorption on the Pd(100) surface, Pd nanocrystals with a number of distinct shapes could be conveniently produced by varying the concentration of KBr added into the growth solution. This work provides a general and facile method for the green synthesis of Pd nanocrystals with controlled shapes, especially for the preparation of Pd nanocrystals with sizes in the sub‐10 nm regime. |
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| Keywords: | bromide kinetics palladium reduction seed‐mediated growth |
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