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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Kinetically Controlled Growth and Shape Formation Mechanism of Platinum Nanoparticles
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Kinetically Controlled Growth and Shape Formation Mechanism of Platinum Nanoparticles

机译：铂纳米粒子的动力学控制的生长和形状形成机理

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摘要

Recently, we have been able to synthesize platinum colloidal nanoparticles of different shapes (Science, 1996 272, 1924). In this report, we present transmission electron microscopic (TEM) results on the time-dependent shape distribution of platinum nanoparticles during the growth period and its dependence on the concentration of the capping polymer as well as the pH of the solution. The results suggest a shape-controlled growth mechanism in which the difference between the rate of the catalytic reduction process of Pt↑(2+) on the {111} and {100} faces, the competition between the Pt↑(2+) reduction and the capping process on the different nanoparticle surfaces, and the concentration-dependent buffer action of the polymer itself all control the final distribution of the different shapes observed.
机译：最近，我们已经能够合成不同形状的铂胶体纳米颗粒（Science，1996 272，1924）。在此报告中，我们介绍了透射电镜（TEM）结果，显示了铂纳米颗粒在生长期间随时间的形状分布及其对封端聚合物浓度和溶液pH值的依赖性。结果表明形状控制生长机制，其中{111}和{100}面上Pt↑（2+）催化还原过程的速率之间的差异，Pt↑（2+）还原之间的竞争在不同的纳米粒子表面上的封端过程以及聚合物本身的浓度依赖性缓冲作用都控制着观察到的不同形状的最终分布。

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