Dynamics of a 3D colloidal suspension in a сonical magnetic field
Aksinya A. Bondareva, 1, Anastasiya A. Shirokova, 1, Maxim A. Dragun, 1, Oleg I. Pokhodyaev, 1, Aleksandra V. Kohanovskaya, 1, Egor V. Yakovlev, 1, Anton I. Shvetsov, 1, Ivan V. Simkin, 1; 1 Bauman Moscow State Technical University, Moscow, Russia
Abstract
A fundamental understanding of soft matter dynamics at the kinetic (single-particle) level is key to unlocking new ways for scientific and technological advancement. These research results can be applied to microfabrication. Rotating electric or magnetic fields provide effective tool for tuning interactions in soft matter. We believe this capability to control particles dynamics on the microns scale opens the way for additive technology of creating new or improved materials. In this report we present a new experimental setup for the control of colloidal magnetic particles interactions in three dimensions via conical rotating magnetic fields. The maximal magnitude of the horizontal field in a suspension is 12 mT, vertical – 9,5 mT. The effect of magnetic field magnitude, conical field precession angle, field anisotropy and suspension concentration on the structure of the formed clusters was investigated. The experiments revealed the dependence of colloidal assembly pathways on the parameters of the experimental system. Light sheet microscopy was selected for the visualization of high-speed processes. This allows observe particle dynamics currently and perform post-processing of dynamics. Thus, novel method for 3D colloidal self-assembly were developed, representing a crucial step towards the controlled microfabrication of 3D structures. This approach is promising for applications in tissue engineering, biophotonics, biomedicine and materials science.
Speaker
Bondareva Aksinya
Bauman Moscow State Technical University, Moscow, Russia
Russia
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