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Related Concept Videos

Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at the...
Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
Another mechanism for membrane domain formation involves membrane proteins interacting with cytoskeletal...
Interfacial Electrochemical Methods: Overview01:06

Interfacial Electrochemical Methods: Overview

Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current passing...
The Resting Membrane Potential01:21

The Resting Membrane Potential

Overview
Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
Mechanisms of Membrane-bending01:15

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...

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Related Experiment Video

Updated: Jul 1, 2026

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
10:40

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy

Published on: April 8, 2018

Freestanding ferroelectric membranes via ionic unlocking van der Waals interface.

Yang Liu1, Xiwen Zhang2, Zhang Zhang1

  • 1School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu, China.

Nature Communications
|June 29, 2026
PubMed
Summary

Researchers developed a water-assisted method to create large, freestanding ferroelectric membranes for flexible electronics. This technique enables high-performance, self-powered sensors with improved piezoelectric properties.

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Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials
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Last Updated: Jul 1, 2026

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
10:40

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy

Published on: April 8, 2018

Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials
04:57

Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials

Published on: July 18, 2025

Area of Science:

  • Materials Science
  • Nanotechnology
  • Solid State Physics

Background:

  • Freestanding oxide films are crucial for flexible electronics but face challenges in scalable, cost-effective production.
  • Existing methods often rely on sacrificial layers, limiting large-area, device-scalable thickness, and cost-efficiency.

Purpose of the Study:

  • To develop a novel, scalable method for producing large-area freestanding ferroelectric membranes.
  • To investigate the underlying mechanism of interfacial weakening for efficient membrane exfoliation.
  • To demonstrate the application of these membranes in high-performance flexible electronic devices.

Main Methods:

  • Water-assisted ionic unlocking strategy for rapid exfoliation.
  • Density functional theory (DFT) and ab initio molecular dynamics (AIMD) simulations.
  • Fabrication and characterization of flexible acoustic sensors.

Main Results:

  • Successfully exfoliated centimeter-scale, freestanding ferroelectric lead zirconate titanate (Pb(Zr,Ti)O3) membranes.
  • Identified water-induced potassium ion leaching as the key interfacial weakening mechanism.
  • Achieved a piezoelectric coefficient of 528 pC N⁻¹, double that of clamped films.
  • Developed self-powered flexible acoustic sensors with >93% speech recognition accuracy.

Conclusions:

  • The water-assisted ionic unlocking strategy offers a scalable and cost-effective route to freestanding ferroelectric membranes.
  • These membranes enable the development of advanced flexible electronic devices, particularly self-powered sensors.
  • This breakthrough facilitates the industrial application of ferroelectric materials in flexible electronics.