Finite-size effects on the closest packing of hard spheres
Finite-size effects on the closest packing of hard spheres
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DOI：
10.1103/physrevlett.79.2348
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发表时间：
1997-09-22
影响因子：
8.6
通讯作者：
Palberg, T
中科院分区：
文献类型：
--
作者：
Neser, S;Bechinger, C;Palberg, T
我们研究了薄楔中硬球胶体悬浮液缓慢侧向压缩形成的紧密堆积的晶体结构。除了已知的结构转变序列之外，最近提出了一种屈曲机制，以最大化一层和两层之间的填充分数Phi。我们在这里证实了这一预测的实验，并提出了第一个证据，超过两层，屈曲，在这种情况下，棱镜形阵列的颗粒，也发生。这种有效的机制可以提高Φ高达4%，并在相图的主要区域占主导地位。
We study closely packed crystalline structures formed by slow lateral compression of a colloidal suspension of hard spheres in a thin wedge. In addition to the known sequence of structural transitions, a buckling mechanism was recently proposed to maximize the packing fraction Phi between one and two layers. We here confirm this prediction experimentally and present the first evidence that for more than two layers, buckling, in this case of prism shaped arrays of particles, also takes place. This efficient mechanism may enhance Phi by up to 4% and dominates in major regions of the phase diagram.