Although high-quality gold nanorods can be routinely synthesized, within a wide range of sizes and aspect ratios, a similar level of control has not been reached for silver nanorods. Whereas seeded-growth processes have been developed, the reported methods have not met sufficient interest, mainly because of limited quality, particularly when small size (short diameter) and small aspect ratios are targeted. In the surfactant-driven seeded growth of gold nanorods, the success of the synthesis is largely dependent on the quality and stability of the seeds, and thus related methods have been reported for the seeded growth of Ag nanorods, using penta-twinned Au nanorods and bipyramids as seeds. However, Ag nanorods with diameters of >30 nm are consistently obtained, restricting their potential applications. We report the preparation of high-quality silver nanorods, using either small bipyramids or small decahedra as seeds, with special attention to the location of the seeds, either at the center (bipyramids) or at one end (decahedra) of the resulting nanorods.

中文翻译：

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调整小型银纳米棒的大小和种子位置

尽管可以常规合成高质量的金纳米棒，但在各种尺寸和长宽比范围内，对于银纳米棒仍未达到类似的控制水平。尽管已经开发了种子生长方法，但是所报告的方法并未引起足够的关注，这主要是因为质量有限，尤其是在针对小尺寸（短直径）和小长宽比的情况下。在表面活性剂驱动的金纳米棒的晶种生长中，合成的成功很大程度上取决于晶种的质量和稳定性，因此，已经报道了使用五孪晶金纳米棒和纳米晶对银纳米棒进行晶种生长的相关方法。双锥体作为种子。但是，始终获得直径> 30 nm的Ag纳米棒，限制了它们的潜在应用。