Stoichiometric and ultra-stable nanoparticles of II-VI compound semiconductors
Stoichiometric and ultra-stable nanoparticles of II-VI compound semiconductors
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DOI：
10.1140/epjd/e2005-00114-9
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发表时间：
2005-07-01
影响因子：
1.8
通讯作者：
Ohuchi, N
中科院分区：
文献类型：
--
作者：
Kasuya, A;Noda, Y;Ohuchi, N
发现纳米颗粒（CdSe）（n）在n = 33和34时非常稳定，其结构与大块碎片明显不同。它们以一种简单的溶液方法大量生长。直径测定为1.5 nm。这种超稳定的纳米粒子在碳富勒烯发现后就已经在理论和实验上被预测到了，但还没有在任何其他元素或化合物体系中宏观地产生。第一性原理计算预测（CdSe）（33）和（CdSe）（34）的结构是褶皱的（CdSe）（28）笼，其内部分别容纳（CdSe）（5）和（CdSe）（6），以形成基本上异极sp（3）键的三维网络。
Nanoparticles of (CdSe)(n) are found extremely stable at n = 33 and 34 with structures distinctively different from the bulk fragments. They grow exclusively in large amount with a simple solution method. The diameter is determined as 1.5 nm. Such ultra-stable nanoparticles had been predicted both theoretically and experimentally after the discovery of carbon fullerenes, but not been produced macroscopically in any other element or compound system. First-principles calculations predict that the structures of (CdSe)(33) and (CdSe)(34) are puckered (CdSe)(28)-cages accommodating respectively (CdSe)(5) an (CdSe)(6) inside to form a three-dimensional network of essentially hetero-polar sp(3)-bonding.