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関連する概念動画

Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

5.9K
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...
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Induced Electric Dipoles01:28

Induced Electric Dipoles

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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...
4.7K
Induced Electric Fields01:23

Induced Electric Fields

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The fact that emfs are induced in circuits implies that work is being done on the conduction electrons in the wires. What can possibly be the source of this work? We know that it’s neither a battery nor a magnetic field, as a battery does not have to be present in a circuit where current is induced, and magnetic fields never do any work on moving charges. The source of the work is in fact an electric field that is induced in the wires. For example, if a stationary conductor is placed in a...
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Electrostatic Boundary Conditions in Dielectrics01:27

Electrostatic Boundary Conditions in Dielectrics

1.8K
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....
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Induced Electric Fields: Applications01:27

Induced Electric Fields: Applications

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An important distinction exists between the electric field induced by a changing magnetic field and the electrostatic field produced by a fixed charge distribution. Specifically, the induced electric field is nonconservative because it does not work in moving a charge over a closed path. In contrast, the electrostatic field is conservative and does no net work over a closed path. Hence, electric potential can be associated with the electrostatic field but not the induced field. The following...
2.5K
Electric Field at the Surface of a Conductor01:26

Electric Field at the Surface of a Conductor

5.2K
Consider a conductor in electrostatic equilibrium. The net electric field inside a conductor vanishes, and extra charges on the conductor reside on its outer surface, regardless of where they originate.
In the 19th century, Michael Faraday conducted the famous ice pail experiment to prove that the charges always reside on the surface of a conductor. The experimental set-up consists of a conducting uncharged container mounted on an insulating stand. The outer surface of the container is...
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Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors
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Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors

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フレキソ・ピロエレクトリック効果

Weihao Gao1,2, Shuhai Liu1,2, Yong Qin1,2

  • 1Institute of Nanoscience and Nanotechnology, School of Materials and Energy, Lanzhou University, Lanzhou, Gansu 730000, China.

Research (Washington, D.C.)
|January 8, 2026
PubMed
まとめ
この要約は機械生成です。

科学者たちは、フレキソエレクトリック効果を利用して中心対称材料にピロエレクトリック効果を誘発しました。このフレキソ・ピロエレクトリック効果は、対称性の制限を克服し、新しい持続可能なエネルギーハーベスティング技術を可能にします。

キーワード:
フレキソ・ピロエレクトリック効果ピロエレクトリック効果中心対称材料エネルギーハーベスティングひずみ工学

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A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
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Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
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Last Updated: Jan 13, 2026

Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors
08:43

Effect of Bending on the Electrical Characteristics of Flexible Organic Single Crystal-based Field-effect Transistors

Published on: November 7, 2016

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

  • 材料科学
  • エネルギーハーベスティング
  • 物性物理学

背景:

  • 持続可能なエネルギー技術は、地球規模の課題に対処するために不可欠です。
  • ピロエレクトリック材料は、温度変動を電気に変換し、有望なエネルギーハーベスティングルートを提供します。
  • 従来のピロエレクトリック効果は、非中心対称結晶に限定されており、有利な特性を持つ多くの材料が除外されています。

研究 の 目的:

  • ピロエレクトリック材料における対称性の制限を克服すること。
  • 中心対称材料におけるピロエレクトリック効果の誘発を実証すること。
  • エネルギーハーベスティングのためのフレキソエレクトリック効果の可能性を探求すること。

主な方法:

  • フレキソエレクトリック効果を利用してピロエレクトリック効果を誘発しました。
  • 原子間力顕微鏡を使用してひずみ勾配を導入しました。
  • 中心対称材料であるSrTiO3のピロエレクトリック特性を調査しました。

主要な成果:

  • SrTiO3において最大1.25 × 10^6 μC·m^-2·K^-1の巨大なピロエレクトリック係数を達成しました。
  • 中心対称材料におけるピロエレクトリック効果を可能にするフレキソ・ピロエレクトリック効果を実証しました。
  • ひずみ工学により、固有の材料極性からピロエレクトリック機能を分離しました。

結論:

  • フレキソ・ピロエレクトリック効果は、ピロエレクトリックにおける長年の対称性の制限を克服します。
  • 中心対称材料は、ひずみ工学を通じて堅牢なピロエレクトリック効果を示すことができます。
  • この発見は、次世代のエネルギーハーベスターのための広範な材料ライブラリを解き放ち、持続可能な技術を進歩させます。