Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Dielectric Polarization in a Capacitor

Dielectric Polarization in a Capacitor

The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...

Electrostatic Boundary Conditions in Dielectrics

Electrostatic Boundary Conditions in Dielectrics

When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity.

Mechanisms of Membrane-bending

Mechanisms of Membrane-bending

The living membranes are flexible due to their fluid mosaic nature; however, their bending into different shapes is an active process regulated by specific lipids and proteins. The membrane bending can be transient as seen in vesicles or stable for a long time as in microvilli. Cells regulate the size, location, and duration of the membrane curvature.
Membrane bending can happen due to intrinsic changes in lipid composition or extrinsic association with different proteins. The proteins involved...

Electrostatic Boundary Conditions

Electrostatic Boundary Conditions

Consider an external electric field propagating through a homogeneous medium. When the electric field crosses the surface boundary of the medium, it undergoes a discontinuity. The electric field can be resolved into normal and tangential components. The amount by which the field changes at any boundary is given by the difference between the field components above and below the surface boundary.
The surface integral of an electric field is given by Gauss's law in integral form and is related to...

Two Components: Liquid–Liquid Systems

Two Components: Liquid–Liquid Systems

A pressure-composition phase diagram explicitly describes the behavior of an ideal solution of two volatile liquids under varying pressures and compositions. A pressure-composition diagram has two main curves. The bubble point curve represents the plot of pressure versus liquid mole fraction. It indicates the pressure at which the first bubble of vapor forms from the liquid phase as the system pressure decreases.The dew point curve is the pressure versus vapor mole fraction. It indicates the...

Oscillations In An LC Circuit

Oscillations In An LC Circuit

An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Reference based transcriptome assembly of <i>Piper nigrum L.</i> reveals novel genes and transcripts in drought tolerance.

Frontiers in plant science·2026

Same author

Periodic ground state in the nematic phase of DIO due to an intrinsic surface electric field.

Soft matter·2025

Same author

Fréedericksz states in elastically varying nematic liquid crystals in the pi-cell geometry.

Physical review. E·2025

Same author

Land suitability analysis for turmeric crop for humid tropical Kerala, India, under current and future climate scenarios using advanced geospatial techniques.

Journal of the science of food and agriculture·2024

Same author

Twist-bend nematic drops as colloidal particles: Electric instabilities.

Physical review. E·2023

Same author

Twist-bend nematic drops as colloidal particles: Structural features.

Physical review. E·2023

Search research articles

Related Experiment Video

Updated: May 26, 2026

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

Competing instability modes in an electrically driven bent-core nematic liquid crystal.

Pramod Tadapatri¹, K S Krishnamurthy

¹Centre for Soft Matter Research, Jalahalli, Bangalore, India.

The Journal of Physical Chemistry. B

|December 16, 2011

Summary

This study explores low-frequency electroconvection in bent-core nematic liquid crystals. It reveals three new instability modes, including nonstandard longitudinal and normal rolls, persisting even after normal roll bifurcation.

More Related Videos

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Published on: August 15, 2018

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

Related Experiment Videos

Last Updated: May 26, 2026

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Published on: August 15, 2018

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

Area of Science:

Liquid Crystal Physics
Nonlinear Dynamics
Soft Matter Science

Background:

Bent-core nematic liquid crystals are less studied in low-frequency electroconvection.
Understanding instabilities in these materials is crucial for novel electronic applications.

Purpose of the Study:

To investigate electroconvection instabilities below 100 Hz in bent-core nematic liquid crystals.
To characterize novel bifurcation modes and their persistence.
To measure relevant electrical parameters for analysis.

Main Methods:

Experimental study of electroconvection in a planar monodomain bent-core nematic liquid crystal.
Applying low-frequency electric fields (below 100 Hz).
Observation and characterization of emerging roll patterns and electrical parameter measurements.

Main Results:

Observed three distinct bifurcation modes (longitudinal, oblique, normal rolls) between 10-17 Hz.
Identified the oblique rolls as the flexoelectrically driven Carr-Helfrich mode.
Found that longitudinal and normal roll instabilities persist even after normal roll bifurcation.

Conclusions:

Bent-core nematics exhibit complex electroconvection behaviors at low frequencies.
The persistence of multiple instability modes leads to hybrid roll states with intricate patterns.
This research expands the understanding of nonlinear phenomena in liquid crystals.