Self-Arrangement of Molybdenum Particles into Cubes
Self-Arrangement of Molybdenum Particles into Cubes
复制标题
钼颗粒自排列成立方体
DOI：
10.1126/science.251.5001.1590
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发表时间：
1991
期刊：
影响因子：
56.9
通讯作者：
D. Hwang
中科院分区：
文献类型：
--
作者：
A. Edelstein;G. Chow;E. Altman;R. Colton;D. Hwang
一个不寻常的分布的颗粒尺寸已被观察到以下的钼颗粒形成的氩离子溅射。在蒸气中形成颗粒的阈值压力下通过溅射产生的许多钼颗粒似乎是单晶立方体。在立方体的边长分布中有两个突出的峰，一个以4.8纳米为中心，半宽约为1.3纳米，另一个在17.5纳米。较大立方体的峰近似为正方形，总宽度为7.0纳米。有证据表明，较大的立方体是由3 × 3 × 3的较小立方体，其中包含约7000个原子的自排列形成的。无机结构中的自排列通常仅在结构单元是原子、分子或小于100个原子的簇时观察到。
An unusual distribution of particle sizes has been observed following the formation of molybdenum particles by argon ion sputtering. Many of the molybdenum particles produced by sputtering at the threshold pressure for particle formation in the vapor appear to be single crystalline cubes. There are two prominent peaks in the edge length distribution of the cubes, one centered at 4.8 nanometers with a halfwidth of approximately 1.3 nanometers and the other at 17.5 nanometers. The peak for the larger cubes is approximately square and has a total width of 7.0 nanometers. Evidence is presented that the larger cubes are formed by a 3 by 3 by 3 self-arrangement of the smaller cubes, which contain approximately 7000 atoms. Self-arrangement in inorganic structures is normally only observed when the building blocks are atoms, molecules, or clusters of less than 100 atoms.