Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA.
Adv Mater. 2013 Aug 7;25(29):4023-7. doi: 10.1002/adma.201301278. Epub 2013 Jun 21.
A centrifugal route for separating small {110}-faceted gold nanostructures, namely rhombic dodecahedra (RD) and triangular bipyramids (BPs), which form simultaneously during synthesis and cannot be separated by means of conventional filtration methods, is presented. The centrifuged solution shows two distinct bands: i) RD and ii) BPs, as verified in the corresponding scanning electron microscopy images. The sorted BPs show a refractive index dependence 2.5 times that of the as-synthesized, unsorted mixture.
本文提出了一种离心分离小{110}面金纳米结构（即菱十二面体（RD）和三角双锥（BP））的方法，这些纳米结构在合成过程中同时形成，无法通过常规过滤方法分离。离心后的溶液显示出两个明显的带：i）RD 和 ii）BP，这在相应的扫描电子显微镜图像中得到了验证。经过分离的 BP 表现出的折射率依赖性是未经分离的原始混合物的 2.5 倍。
