Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China.
Dalton Trans. 2012 Apr 28;41(16):4948-54. doi: 10.1039/c2dt12469f.
Nanostructures with concave surfaces are not common, and their synthesis is still challenging. In this paper, we have successfully synthesized two kinds of five-fold-twinned Au decahedra and dodecagonal plates by changing the reaction conditions. 40 high-index {221} facets were observed in the concave decahedron. The truncated decahedral gold nanocrystals (NCs) with a large size of 250-350 nm were obtained for the first time, which breaks the assumption that the truncated five-fold-twinned Au nanoparticles (NPs) can only be obtained with a size below 5 nm. The growth mechanism and the evolution process of the gold nanostructures were discussed. This work provides a facile way to synthesize concave decahedra, truncated decahedra and dodecagonal plates with controlled nanostructures.
具有凹面的纳米结构并不常见，其合成仍然具有挑战性。在本文中，我们通过改变反应条件成功合成了两种五重孪晶 Au 十面体和十二角形板。在凹面十面体中观察到 40 个高指数 {221} 面。首次获得了尺寸为 250-350nm 的大尺寸截断五重孪晶 Au 纳米晶 (NCs)，这打破了截断五重孪晶 Au 纳米颗粒 (NPs) 只能通过尺寸小于 5nm 获得的假设。讨论了金纳米结构的生长机制和演变过程。这项工作为合成具有可控纳米结构的凹面十面体、截断十面体和十二角形板提供了一种简便的方法。
