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

Imperfections in Crystal Structure: Stoichiometric Point Defects

Imperfections in Crystal Structure: Stoichiometric Point Defects

Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...

Induced Electric Dipoles

Induced Electric Dipoles

A permanent electric dipole orients itself along an external electric field. This rotation can be quantified by defining the potential energy because the external torque does work in rotating it. Then, the potential energy is minimum at the parallel configuration and maximum at the antiparallel configuration. While the former is a stable equilibrium, the latter is an unstable equilibrium.
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...

Susceptibility, Permittivity and Dielectric Constant

Susceptibility, Permittivity and Dielectric Constant

When placed in an external electric field, a dielectric material gets polarized. The charge density in the dielectric material is given by the sum of the bound and free charge densities, while the total charge density can also be written in terms of the total electric field. The bound charge density can be measured in terms of polarization, leading to the relationship between electric displacement and polarization.

Potential Due to a Polarized Object

Potential Due to a Polarized Object

A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...

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.

Imperfections in Crystal Structure: Non-Stoichiometric Defects

Imperfections in Crystal Structure: Non-Stoichiometric Defects

Non-stoichiometric defects refer to a type of defect in the crystal structure of a compound where the ratio of its constituent elements deviates from the ideal stoichiometric ratio. There are two main types of non-stoichiometric defects: metal excess defects and metal deficiency defects.Metal excess defects occur when there is a slight surplus of metal ions than what is required by the stoichiometric ratio of the compound. For example, heating a sodium chloride crystal in sodium vapor results...

You might also read

Related Articles

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

Sort by

Same author

Pleistocene chronology and history of hominins and fauna at Denisova Cave.

Nature communications·2025

Same author

Inferring the age and environmental characteristics of fossil sites using citizen science.

PloS one·2023

Same author

Advanced Dual-Ion Batteries with High-Capacity Negative Electrodes Incorporating Black Phosphorus.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2022

Same author

Centimetre-scale perovskite solar cells with fill factors of more than 86 per cent.

Nature·2022

Same author

High resolution 3D mapping of grain kinematics during high temperature sequestration of SO<sub>2</sub> from flue gas by carbonate aggregates.

Scientific reports·2020

Same author

Acute pancreatitis as a complication of routine colonoscopy-A rare case report.

International journal of surgery case reports·2019

Search research articles

Related Experiment Video

Updated: May 10, 2026

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

Electric-field Control of Electronic States in WS₂ Nanodevices by Electrolyte Gating

Published on: April 12, 2018

Electron-pinned defect-dipoles for high-performance colossal permittivity materials.

Wanbiao Hu¹, Yun Liu, Ray L Withers

¹Research School of Chemistry, The Australian National University, Australian Capital Territory 0200, Australia.

Nature Materials

|July 2, 2013

Summary

Researchers developed a novel defect-engineering approach for colossal permittivity (CP) materials. This method utilizes localized electrons and defect dipoles to create high-performance CP materials for electronics and energy storage.

More Related Videos

Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope

Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope

Published on: May 28, 2016

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites

Published on: September 19, 2020

Related Experiment Videos

Last Updated: May 10, 2026

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

Electric-field Control of Electronic States in WS₂ Nanodevices by Electrolyte Gating

Published on: April 12, 2018

Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope

Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope

Published on: May 28, 2016

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites

Application of a Coupling Agent to Improve the Dielectric Properties of Polymer-Based Nanocomposites

Published on: September 19, 2020

Area of Science:

Materials Science
Solid State Physics
Nanotechnology

Background:

Colossal permittivity (CP) materials offer significant potential for microelectronics and energy storage.
Developing high-performance CP materials remains a challenge despite recent discoveries.
Existing CP materials often face limitations in temperature and frequency stability.

Purpose of the Study:

To propose and demonstrate a new route to achieve ideal colossal permittivity behavior.
To investigate the electron-pinned, defect-dipole mechanism for enhanced CP properties.
To develop high-performance CP materials through defect engineering.

Main Methods:

Utilized an electron-pinned, defect-dipole strategy.
Synthesized and characterized (Nb+In) co-doped TiO₂ rutile.
Performed systematic defect analysis and density functional theory (DFT) modeling.

Main Results:

Achieved a temperature- and frequency-independent colossal permittivity (> 10^4) in co-doped TiO₂.
Observed low dielectric loss (mostly < 0.05) across a broad temperature range (80–450 K).
Identified correlated defect complexes (e.g., In₂(3+)Vo(••)Ti(3+), Nb₂(5+)Ti(3+)A(Ti)) responsible for CP properties.

Conclusions:

The proposed electron-pinned, defect-dipole route is effective for creating high-performance CP materials.
Defect engineering, specifically creating defect-dipole clusters, is key to achieving excellent CP properties.
This work provides a feasible pathway for the systematic development of advanced CP materials.