Department of Chemical Engineering, Kyoto University, Katsura, Nishikyo, Kyoto 615-8510, Japan.
Langmuir. 2011 May 3;27(9):5290-5. doi: 10.1021/la200515w. Epub 2011 Apr 1.
We explored a "template-free" approach to arranging colloidal particles into a network pattern by a convective self-assembly technique. In this approach, which we call "two-step convective self-assembly," a stripe pattern of colloidal particles is first prepared on a substrate by immersing it in a suspension. The substrate with the stripes is then rotated by 90° and again immersed in the suspension to produce stripes perpendicular to the first ones, resulting in a grid-pattern network of colloidal arrays. The width of the colloidal grid lines can be controlled by changing the particle concentration while maintaining an almost constant spacing between the lines. On the basis of these results, we propose a mechanism for grid pattern formation. Our method is applicable to various types of particles. In addition, the wide applicability of this method was employed to create a hybrid grid pattern.
我们探索了一种“无模板”的方法，通过对流自组装技术将胶体颗粒排列成网络图案。在这种方法中，我们称之为“两步对流自组装”，首先通过将基底浸入悬浮液中来在基底上制备胶体颗粒的条带图案。然后将具有条带的基底旋转 90°，并再次浸入悬浮液中以产生与第一条带垂直的条带，从而产生胶体阵列的网格图案网络。通过改变颗粒浓度而保持线之间几乎恒定的间距，可以控制胶体网格线的宽度。基于这些结果，我们提出了网格图案形成的机制。我们的方法适用于各种类型的颗粒。此外，该方法的广泛适用性被用于创建混合网格图案。
