Yakovlev Egor V, Komarov Kirill A, Zaytsev Kirill I, Kryuchkov Nikita P, Koshelev Kirill I, Zotov Arsen K, Shelestov Dmitry A, Tolstoguzov Victor L, Kurlov Vladimir N, Ivlev Alexei V, Yurchenko Stanislav O
Bauman Moscow State Technical University, 2nd Baumanskaya street 5, 105005, Moscow, Russia.
Institute of Solid State Physics of Russian Academy of Sciences, Academician Osipyan street 2, 142432, Chernogolovka, Russia.
Sci Rep. 2017 Oct 23;7(1):13727. doi: 10.1038/s41598-017-14001-y.
Tunable interparticle interactions in colloidal suspensions are of great interest because of their fundamental and practical significance. In this paper we present a new experimental setup for self-assembly of colloidal particles in two-dimensional systems, where the interactions are controlled by external rotating electric fields. The maximal magnitude of the field in a suspension is 25 V/mm, the field homogeneity is better than 1% over the horizontal distance of 250 μm, and the rotation frequency is in the range of 40 Hz to 30 kHz. Based on numerical electrostatic calculations for the developed setup with eight planar electrodes, we found optimal experimental conditions and performed demonstration experiments with a suspension of 2.12 μm silica particles in water. Thanks to its technological flexibility, the setup is well suited for particle-resolved studies of fundamental generic phenomena occurring in classical liquids and solids, and therefore it should be of interest for a broad community of soft matter, photonics, and material science.
由于其基础和实际意义，胶体悬浮液中可调节的粒子间相互作用备受关注。在本文中，我们展示了一种用于二维系统中胶体粒子自组装的新型实验装置，其中相互作用由外部旋转电场控制。悬浮液中电场的最大强度为25 V/mm，在250μm的水平距离上电场均匀性优于1%，旋转频率在40 Hz至30 kHz范围内。基于对具有八个平面电极的已开发装置的数值静电计算，我们找到了最佳实验条件，并对水中2.12μm二氧化硅颗粒的悬浮液进行了演示实验。由于其技术灵活性，该装置非常适合对经典液体和固体中发生的基本普遍现象进行粒子分辨研究，因此应该会引起软物质、光子学和材料科学广大领域的兴趣。
