Recrystallization in two-dimensional colloidal crystals under a rotating electric field: The relationship between grain size, deformation, and interparticle interaction forces
Daniil A. Bystrov1, Ivan A. Kushnir1, Sofia A. Korsakova1, Egor V. Yakovlev1, Nikita P. Kryuchkov1, Stanislav O. Yurchenko1; 1Bauman Moscow State Technical University, 2nd Baumanskaya street 5, Moscow, 105005, Russia
Abstract
This study explores the impact of interparticle attraction strength, precisely controlled by a rotating electric field, on the size and shape of crystalline grains formed during the recrystallization of a two-dimensional colloidal system. This investigation provides valuable insights into the fundamental processes governing material assembly at the microscale, with significant implications for material science and engineering.
A monolayer of monodisperse silica particles dispersed in deionized water served as a model two-dimensional colloidal crystal. A custom-designed eight-electrode cell generated a uniform, rotating electric field across the monolayer, inducing attractive dipole-dipole forces between the silica particles. Careful adjustments to the electrode voltage allowed for fine control over interparticle attraction strength and, consequently, the system's effective temperature. This setup enabled a systematic exploration of the relationship between interparticle forces and recrystallization behavior.
High-resolution video microscopy facilitated real-time observation of the evolving colloidal crystal microstructure. Advanced image processing algorithms were employed to extract quantitative data on grain size, shape, and order within the system.
The findings revealed a clear trend: increasing the electrode voltage, corresponding to stronger interparticle attractions, promoted the formation of larger, more uniform crystalline grains. This outcome demonstrates a strong correlation between interparticle attraction and the development of desirable crystallites during recrystallization. Understanding and harnessing this relationship could lead to new strategies for designing materials with tailored properties.
This work was supported by the Russian Science Foundation, Grant No. 20-72-10161
Speaker
Daniil A. Bystrov
Bauman Moscow State Technical University, 2nd Baumanskaya street 5, Moscow, 105005, Russia
Russia
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