Assembly of Colloidal Particles into Microwires Using an Alternating Electric Field

Electrophoresis in an alternating electric field is the basis for electroacoustical measurements. These measurements provide new means of investigating the electrokinetic properties of colloidal systems. In order to relate electroacoustical signals to the charge and the size of colloidal particles, an expression is required for the dynamic electrophoretic mobility of colloidal particles in a continuous fluid. In this paper, an exact analytical solution to the problem is given for an arbitrary ratio between the particle radius and the electric double-layer thickness, in the case where the electrokinetic potential of the uniformly charged particle is small and unaffected by the alternating field.

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S. I. Kostin and the emergence of studies into the biological effects of alternating electric field in the Russian Empire

Вопросы истории естествознания и техники ◽

10.31857/s020596060007322-6 ◽

2019 ◽

Vol 40 (4) ◽

pp. 670-683

Keyword(s):

Electric Field ◽

Biological Effects ◽

Russian Empire ◽

Alternating Electric Field ◽

The Russian Empire

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Formation of Regular Domain Structures in Quenched Ferroelectrics Under the Influence of an External High-frequency Electric Field

Nanoscience &Nanotechnology-Asia ◽

10.2174/2210681208666180626124705 ◽

2019 ◽

Vol 9 (3) ◽

pp. 344-352 ◽

Cited By ~ 4

Author(s):

L.I. Stefanovich ◽

O.Y. Mazur ◽

V.V. Sobolev

Keyword(s):

Lithium Niobate ◽

Electric Field ◽

Domain Structure ◽

High Frequency ◽

Evolution Equations ◽

Regular Domain ◽

Field Frequency ◽

Domain Structures ◽

Alternating Electric Field ◽

Lithium Niobate Crystals

Introduction: Within the framework of the phenomenological theory of phase transitions of the second kind of Ginzburg-Landau, the kinetics of ordering of a rapidly quenched highly nonequilibrium domain structure is considered using the lithium tantalate and lithium niobate crystals as an example. Experimental: Using the statistical approach, evolution equations describing the formation of the domain structure under the influence of a high-frequency alternating electric field in the form of a standing wave were obtained. Numerical analysis has shown the possibility of forming thermodynamically stable mono- and polydomain structures. It turned out that the process of relaxation of the system to the state of thermodynamic equilibrium can proceed directly or with the formation of intermediate quasi-stationary polydomain asymmetric phases. Results: It is shown that the formation of Regular Domain Structures (RDS) is of a threshold character and occurs under the influence of an alternating electric field with an amplitude less than the critical value, whose value depends on the field frequency. The conditions for the formation of RDSs with a micrometer spatial scale were determined. Conclusion: As shown by numerical studies, the RDSs obtained retain their stability, i.e. do not disappear even after turning off the external electric field. Qualitative analysis using lithium niobate crystals as an example has shown the possibility of RDSs formation in high-frequency fields with small amplitude under resonance conditions

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