Synthesis of Platinum Nanowheels Using a Bicellar Template
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- 作者：Yujiang Song ; Rachel M. Dorin ; Robert M. Garcia ; Ying-Bing Jiang ; Haorong Wang ; Peng Li ; Yan Qiu ; Frank van Swol ; James E. Miller ; John A. Shelnutt
- 刊名：Journal of the American Chemical Society
- 出版年：2008
- 出版时间：September 24, 2008
- 年：2008
- 卷：130
- 期：38
- 页码：12602-12603
- 全文大小：199K
- 年卷期：v.130,no.38(September 24, 2008)
- ISSN：1520-5126
文摘
Disk-like surfactant bicelles provide a unique meso-structured reaction environment for templating the wet-chemical reduction of platinum(II) salt by ascorbic acid to produce platinum nanowheels. The Pt wheels are 496 ± 55 nm in diameter and possess thickened centers and radial dendritic nanosheets (about 2-nm in thickness) culminating in flared dendritic rims. The structural features of the platinum wheels arise from confined growth of platinum within the bilayer that is also limited at edges of the bicelles. The size of CTAB/FC7 bicelles is observed to evolve with the addition of Pt(II) complex and ascorbic acid. Synthetic control is demonstrated by varying the reaction parameters including metal salt concentration, temperature, and total surfactant concentration. This study opens up opportunities for the use of other inhomogeneous soft templates for synthesizing metals, metal alloys, and possibly semiconductors with complex nanostructures.