Ordering self-assembled islands without substrate patterning
Ordering self-assembled islands without substrate patterning
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DOI：
10.1063/1.1561163
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发表时间：
2003-03
影响因子：
4
通讯作者：
G. Capellini;M. Seta;C. Spinella;F. Evangelisti
中科院分区：
文献类型：
--
作者：
G. Capellini;M. Seta;C. Spinella;F. Evangelisti
在层叠的多层异质外延岛的生长中产生的应变场的自图案化，以及通过作用于沉积温度来调节岛大小的能力，在这里被利用来获得自组织，导致由规则布置的纳米大小的岛组成的有序的簇。我们的结果表明，海岛的空间分布可以从随机的海岛团簇调整到有序的正方形海岛星团格子，每个星团内的岛屿数量可以选择。此外，由于相邻岛屿之间的偶极排斥作用，岛屿本身在单个团簇内沿着相同的长程团簇有序的[010]-[100]结晶方向有序排列。
The self-patterning of the strain field that arises in the growth of stacked multilayers of heteroepitaxial islands, together with the capability of tuning the island size by acting on the deposition temperature, are here exploited to obtain self-organization, resulting in well-ordered clusters composed of regularly disposed, nanosized islands. Our results show that the island spatial distribution can be tuned from a random one to a well-ordered square lattice of island clusters, and that the number of islands inside each cluster can be selected. Moreover, due to the dipole repulsive interaction between adjacent islands, the islands themselves arrange in an ordered fashion inside a single cluster along the same [010]-[100] crystalline directions of the long-range cluster ordering.