A simple numerical calculation correctly predicts the observed size regime for growth of tetrapodal chalcogenide nanocrystals.
A simple numerical calculation correctly predicts the observed size regime for growth of tetrapodal chalcogenide nanocrystals.
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DOI：
10.1021/ja060825u
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发表时间：
2006-04
影响因子：
15
通讯作者：
P. Thomas;P. O’Brien
中科院分区：
文献类型：
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作者：
P. Thomas;P. O’Brien
最近已经发现了产生四足体、棒和棱柱形式的单分散纳米晶颗粒的合成方案。已经定义了促进不同形状的颗粒生长的条件。然而，各向异性生长和特定形状（如四足动物）的进化的基本原理仍然未知。简单的数值计算的基础上，我们建议，需要保存的表面原子在纳米晶体的生长中起着至关重要的作用，在形成的四脚体，并正确地预测的大小制度，在这种结构中获得。
Synthetic schemes yielding monodisperse nanocrystalline particulates in the form of tetrapods, rods, and prisms have been recently discovered. Conditions promoting growth of different shapes of particulates have been defined. However, the rationale for anisotropic growth and the evolution of specific shapes, such as tetrapods, is as yet unknown. On the basis of simple numerical calculations, we suggest that the need to conserve the surface atoms plays a vital role in the growth of nanocrystals in the formation of tetrapods and correctly predicts the size regime in which such structures are obtained.