Nano Lett. 2015 Apr 8;15(4):2751-5. doi: 10.1021/acs.nanolett.5b00614. Epub 2015 Mar 25.
We demonstrate the facile synthesis of high purity aluminum nanocrystals over a range of controlled sizes from 70 to 220 nm diameter with size control achieved through a simple modification of solvent ratios in the reaction solution. The monodisperse, icosahedral, and trigonal bipyramidal nanocrystals are air-stable for weeks, due to the formation of a 2-4 nm thick passivating oxide layer on their surfaces. We show that the nanocrystals support size-dependent ultraviolet and visible plasmon modes, providing a far more sustainable alternative to gold and silver nanoparticles currently in widespread use.
我们展示了一种简便的方法，可在 70 至 220nm 直径范围内合成具有可控尺寸的高纯铝纳米晶体，通过简单改变反应溶液中的溶剂比例即可实现尺寸控制。由于在纳米晶体表面形成了 2-4nm 厚的钝化氧化层，这些单分散的、二十面体和三角双锥的纳米晶体在空气中稳定数周。我们表明，纳米晶体支持尺寸相关的紫外和可见等离子体模式，为目前广泛使用的金和银纳米粒子提供了一种更可持续的替代方案。
