Structure Formation at the Interface of Liquid/Liquid Bilayer in Electric Field

2002 ◽  
Vol 35 (10) ◽  
pp. 3971-3976 ◽  
Author(s):  
Zhiqun Lin ◽  
Tobias Kerle ◽  
Thomas P. Russell ◽  
Erik Schäffer ◽  
Ullrich Steiner
Keyword(s):  
Electric Field ◽  
Structure Formation

Electric field and dewetting induced hierarchical structure formation in polymer/polymer/air trilayers

2005 ◽  
Vol 15 (4) ◽  
pp. 047506 ◽  
Author(s):  
K. Amanda Leach ◽  
Suresh Gupta ◽  
Michael D. Dickey ◽  
C. Grant Willson ◽  
Thomas P. Russell
Keyword(s):  
Electric Field ◽  
Structure Formation ◽  
Hierarchical Structure

ELECTRORHEOLOGICAL METHOD OF FIXATION OF COMPLICATED PIECEWORKS UNDER MECHANICAL TREATMENT

2005 ◽  
Vol 19 (07n09) ◽  
pp. 1619-1627
Author(s):  
E. V. KOROBKO
Keyword(s):  
Electric Field ◽  
Structure Formation ◽  
External Electric Field ◽  
Mechanical Treatment ◽  
Fluid Viscosity ◽  
Mechanical Parameters ◽  
Complicated Shape ◽  
Technological Characteristics ◽  
Fine Turning

The data of previous researchers on the structure formation of electro sensitive suspensions under the action of an external electric field and on the resulting changes in the mechanical parameters of the fluid (viscosity, plasticity, elasticity) were used to develop a method of damping in a special clutches, which were used for fixing complicated shape construction (blade), that surfaces are to undergo fine turning. As demonstrated, the use of a fluid, the structure of which responds to an electric field as a clutching layer, improves the technological characteristics of the product and increase its reliability.

MONODISPERSE COLLOIDAL SUSPENSIONS OF SILICA AND PMMA SPHERES AS MODEL ELECTRORHEOLOGICAL FLUIDS: A REAL-SPACE STUDY OF STRUCTURE FORMATION

2002 ◽  
Vol 16 (17n18) ◽  
pp. 2328-2333 ◽  
Author(s):  
ANAND YETHIRAJ ◽  
ALFONS VAN BLAADEREN
Keyword(s):  
Electric Field ◽  
Structure Formation ◽  
Colloidal Particles ◽  
Intermediate Phase ◽  
Finite Size ◽  
Colloidal Suspensions ◽  
Real Space ◽  
Three Dimensions ◽  
Electrorheological Fluids ◽  
Crystal Formation

Colloidal particle coordinates in three dimensions can be obtained in 3D samples with a combination of the increased resolution and optical sectioning capabilities of confocal microscopy and fluorescently labeled model core-shell silica colloids. In this work we show how this capability can be used to analyze structure formation in electrorheological fluids on a quantitative basis. We find body-centered-tetragonal (BCT) crystals for colloidal particles in an electric field. Metastable sheet like structures were identified as an intermediate phase prior to BCT crystal formation. Due to finite-size effects induced by the electrode surface the sheets are not randomly oriented, but grow preferentially with a 60° tilt with respect to the electric field. Preliminary measurements indicate that flow-aligned sheets form under shear. Finally, we show that in the case that the ionic strength is very low, electric-field-induced dipolar interactions can be present in addition to long-range repulsions between the colloids leading to interesting metastable and equilibrium structures with possibilities for applications in photonic bandgap crystals as well as in model ER studies.

Hierarchical structure formation and pattern replication induced by an electric field

2002 ◽  
Vol 2 (1) ◽  
pp. 48-52 ◽  
Author(s):  
Mihai D. Morariu ◽  
Nicoleta E. Voicu ◽  
Erik Schäffer ◽  
Zhiqun Lin ◽  
Thomas P. Russell ◽  
...  
Keyword(s):  
Electric Field ◽  
Structure Formation ◽  
Hierarchical Structure

scholarly journals The orientation of the layered aluminosilicates particles with a high aspect ratio in paraffin under electric field

2019 ◽  
Vol 486 (6) ◽  
pp. 663-667
Author(s):  
N. M. Kuznetsov ◽  
A. V. Bakirov ◽  
S. I. Belousov ◽  
S. N. Chvalun
Keyword(s):  
Aspect Ratio ◽  
Electric Field ◽  
Structure Formation ◽  
High Aspect Ratio ◽  
Structural Organization ◽  
X Ray ◽  
X Ray Scattering ◽  
Filler Particles ◽  
Tubular Shape ◽  
Ray Scattering

The electrorheological behavior is significantly affected by the strength of the structure formed in the electric field, due to the filler particles orientation. The structural organization of the filler in electric field was studied by X-ray scattering on paraffin films. Particles of layered aluminosilicates with a high aspect ratio and various morphology such as montmorillonite and halloysite were used as fillers. The differences in the structure formation by fillers of plate and tubular shape were shown.

Structural Formation of the Cement Pastes Based on the Concrete Modified Dispersed Mineral Components

2020 ◽  
Vol 1011 ◽  
pp. 14-22
Author(s):  
A. Khalyushev ◽  
Sergey Stelmakh ◽  
Evgeniy Shcherban ◽  
A. Chernilnik
Keyword(s):  
Surface Modification ◽  
Electric Field ◽  
Structure Formation ◽  
High Voltage ◽  
Angle Of Repose ◽  
Cement Stone ◽  
Formation Processes ◽  
Cement Pastes ◽  
Structural Formation ◽  
Plastic Strength

With the increase in the number of finely dispersed mineral additives in concrete, their water demand increases and the effect of micro-filling weakens. To solve this problem, various methods of dry surface modification are proposed. As a result of the finely dispersed mineral powders’ surface modification, an improvement in their rheological characteristics, a decrease in wettability, a change in granulometry and other properties are achieved. This article discusses the surface modification effect’s laws in a high-voltage electric field on the autogenous properties of mineral dispersed concrete components, structure formation processes, mechanical properties, and cement stone hydration products. According to the results of the study, it was found that the surface modification of bulk materials - concrete components - in a high-voltage electric field changes autohesion properties in comparison with control samples. The data indicate lower values ​​of bulk density and angle of repose. This is due to a change in the balance of forces that arise during the mutual contact of particles after surface modification. With a certain balance of these forces, autohesion will contribute to the dense packing of particles and thereby affect the structure formation processes. The results of changes in the plastic strength of cement pastes confirm that there is an intensification of the structure formation process. Moreover, a more intense increase in plastic strength is observed during bipolar charging of particles in comparison with unipolar charging. This is due to an increase in the number of heterogeneous charges in the system and, as a consequence, an increase in the strength of adhesive contacts, as evidenced by the data of X-ray phase analysis.

Hydrogen Isotope Effect on Self-Organized Radial Electric Field Criticality During Electron Internal Transport Barrier Formation in Toroidal Plasmas

2021 ◽  
Author(s):  
Tatsuya Kobayashi ◽  
Akihiro Shimizu ◽  
Masaki Nishiura ◽  
Takeshi Ido ◽  
Shinsuke Satake ◽  
...  
Keyword(s):  
Electric Field ◽  
Structure Formation ◽  
Isotope Effect ◽  
Hydrogen Isotope ◽  
Ion Beam ◽  
Radial Electric Field ◽  
Heavy Ion ◽  
Threshold Condition ◽  
Self Organized ◽  
Hydrogen Isotope Effect

Abstract Self-organized structure formation in magnetically confined plasmas is one of the most attractive subjects in modern experimental physics. Nonequilibrium media are known to often exhibit phenomena that cannot be predicted by superposition of linear theories. One representative example of such phenomena is the hydrogen isotope effect in fusion plasmas, where the larger the mass of the hydrogen isotope fuel is the better the plasma confinement becomes, contrary to what simple scaling models anticipate. In this article, threshold condition of a plasma structure formation is shown to have a strong hydrogen isotope effect. To investigate the underlying mechanism of this isotope effect, the electrostatic potential is directly measured by a heavy ion beam probe. It is elucidated that the positive radial electric field structure can be driven by less input power normalized by plasma density in plasmas with larger isotope mass across the structure formation.

Electrorheological Fluids: Structure Formation, Relaxation, and Destruction

1991 ◽  
Vol 248 ◽  
Author(s):  
Thomas C. Halsey
Keyword(s):  
Electric Field ◽  
Structure Formation ◽  
Colloidal Particles ◽  
Strong Electric Field ◽  
Columnar Structure ◽  
Electrorheological Fluids ◽  
Qualitative Behavior ◽  
Ordered Structures ◽  
Dipolar Particles ◽  
Oriented Parallel

AbstractIn a strong electric field, the qualitative behavior of electrorheological fluids is dominated by the dipolar interactions between the colloidal particles. When thermal effects can be ignored, the ground state of a system of dipolar particles is an ordered solid. However, long-range ordered structures are rarely seen in experiment. When a high electric field is applied to a fluid, dielectric columns oriented parallel to the field rapidly form. The relaxation of these columns is a much slower process. I calculate the shape of the columns formed and the time scale for the relaxation of the columnar structure. I also discuss how this structure formation is altered in the presence of a shear flow.

Sign in / Sign up

Export Citation Format

Share Document