Pressure and electric field-induced metallization in the phase-engineered ZrX2(X = S, Se, Te) bilayers

2015 ◽  
Vol 17 (29) ◽  
pp. 19215-19221 ◽  
Author(s):  
Ashok Kumar ◽  
Haiying He ◽  
Ravindra Pandey ◽  
P. K. Ahluwalia ◽  
K. Tankeshwar
Keyword(s):  
Electric Field ◽  
Band Gap ◽  
Applied Electric Field ◽  
Critical Value

Band-gap (Eg)vs.applied electric field (E) for T- and H-bilayers, showing complete metallization at the critical value of the electric field.

ELECTRIC-FIELD-INDUCED LAMELLAR STRUCTURES IN MAGNETIC FLUIDS — A 2D DIFFUSION MODEL

2002 ◽  
Vol 16 (17n18) ◽  
pp. 2341-2344 ◽  
Author(s):  
BRETT RILEY ◽  
ANIKET BHATTACHARYA ◽  
MICHAEL JOHNSON ◽  
XIAODONG DUAN ◽  
WEILI LUO
Keyword(s):  
Phase Separation ◽  
Electric Field ◽  
Diffusion Model ◽  
Magnetic Fluid ◽  
Applied Electric Field ◽  
Continuity Equation ◽  
Fluid Layer ◽  
Critical Value ◽  
Lamellar Structures ◽  
2D Simulation

A lamellar pattern can form in a thin magnetic fluid layer when the applied electric field is above a critical value. A 2D simulation is performed to study the field-induced phase separation and the pattern by using the mass continuity equation. The simulation produces the similar structure in field but does not match the experimental growth law.

Symmetry Breaking in ER and MR Fluids Under Shear

2000 ◽  
Author(s):  
R. Tao ◽  
J. Zhang ◽  
Y. Shiroyanagi ◽  
X. Tang ◽  
X. Zhang
Keyword(s):  
Symmetry Breaking ◽  
Electric Field ◽  
Shear Strain ◽  
Applied Electric Field ◽  
Shear Force ◽  
Critical Value ◽  
Mr Fluids

Abstract The behavior of an electtorheological (ER) chain under a shear force is investigated theoretically and experimentally. Contrary to the conventional assumption that the ER chain under a shear force becomes slanted and breaks at the middle, we have found that there is symmetry breaking. When the shear strain is small, the chain becomes slanted with a space gap between the first and second particles (or between the last and next last particles). As the shear strain increases, the gap becomes wider and wider. When the shear strain exceeds a critical value, the chain breaks at the gap. The experiment also confirms that an ER chain under the shear breaks at either end, not at the middle. This symmetry breaking reflects the space’s anisotropy, which is the result of the applied electric field.

scholarly journals Electroosmotic Flow of Viscoelastic Fluid through a Constriction Microchannel

Micromachines ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 417
Author(s):  
Jianyu Ji ◽  
Shizhi Qian ◽  
Zhaohui Liu
Keyword(s):  
Electric Field ◽  
Newtonian Fluid ◽  
Viscoelastic Fluid ◽  
Apparent Viscosity ◽  
Applied Electric Field ◽  
Electroosmotic Flow ◽  
Microfluidic Channel ◽  
Critical Value ◽  
Poisson Boltzmann ◽  
Boltzmann Model

Electroosmotic flow (EOF) has been widely used in various biochemical microfluidic applications, many of which use viscoelastic non-Newtonian fluid. This study numerically investigates the EOF of viscoelastic fluid through a 10:1 constriction microfluidic channel connecting two reservoirs on either side. The flow is modelled by the Oldroyd-B (OB) model coupled with the Poisson–Boltzmann model. EOF of polyacrylamide (PAA) solution is studied as a function of the PAA concentration and the applied electric field. In contrast to steady EOF of Newtonian fluid, the EOF of PAA solution becomes unstable when the applied electric field (PAA concentration) exceeds a critical value for a fixed PAA concentration (electric field), and vortices form at the upstream of the constriction. EOF velocity of viscoelastic fluid becomes spatially and temporally dependent, and the velocity at the exit of the constriction microchannel is much higher than that at its entrance, which is in qualitative agreement with experimental observation from the literature. Under the same apparent viscosity, the time-averaged velocity of the viscoelastic fluid is lower than that of the Newtonian fluid.

ELECTRORHEOLOGICAL FLUIDS UNDER SHEAR

2001 ◽  
Vol 15 (06n07) ◽  
pp. 918-929 ◽  
Author(s):  
R. Tao ◽  
J. Zhang ◽  
Y. Shiroyanagi ◽  
X. Tang ◽  
X. Zhang
Keyword(s):  
Symmetry Breaking ◽  
Electric Field ◽  
Shear Strain ◽  
Applied Electric Field ◽  
Shear Force ◽  
Critical Value ◽  
Electrorheological Fluids

The behavior of an electrorheological (ER) chain under a shear force is investigated theoretically and experimentally. Contrary to the conventional assumption that the ER chain under a shear force becomes slanted and breaks at the middle, we have found that there is symmetry breaking. When the shear strain is small, the chain becomes slanted with a space gap between the first and second particles (or between the last and next last particles). As the shear strain increases, the gap becomes wider and wider. When the shear strain exceeds a critical value, the chain breaks at the gap. The experiment also confirms that an ER chain under the shear breaks at either end, not at the middle. This symmetry breaking reflects the space's anisotropy, which is the result of the applied electric field.

Electric field effects on the electronic properties of the silicene–amine interface

2016 ◽  
Vol 18 (23) ◽  
pp. 15639-15644 ◽  
Author(s):  
Kenji Iida ◽  
Katsuyuki Nobusada
Keyword(s):  
Electric Field ◽  
Band Gap ◽  
Electronic Properties ◽  
First Principles ◽  
Applied Electric Field ◽  
First Principles Calculations ◽  
Electric Field Effects ◽  
Field Effects

The mechanism of band gap variation in silicene–amine hetero-interface systems with an applied electric field is revealed by carrying out first-principles calculations.

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