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関連する概念動画

Induced Electric Dipoles01:28

Induced Electric Dipoles

4.4K
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...
4.4K
Induced Electric Fields01:23

Induced Electric Fields

4.0K
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...
4.0K
Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

2.5K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.5K
Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

490
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,...
490
Voltaic/Galvanic Cells02:47

Voltaic/Galvanic Cells

58.7K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
58.7K
Standard Electrode Potentials03:02

Standard Electrode Potentials

45.3K
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
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Updated: Sep 30, 2025

AC Electrokinetic Phenomena Generated by Microelectrode Structures
20:38

AC Electrokinetic Phenomena Generated by Microelectrode Structures

Published on: July 28, 2008

11.6K

出現するカゴメ電極

Jing-Yang You1, Bo Gu2, Gang Su2

  • 1Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117551.

Journal of the American Chemical Society
|March 16, 2022
PubMed
まとめ
この要約は機械生成です。

研究者はカゴム電極を用いて,カゴム以外の材料で理想的なカゴム帯を作りました. これは新しい物理現象を探求し,先進的な電子材料を設計するための新しい道を開きます.

さらに関連する動画

Development of a 3D Graphene Electrode Dielectrophoretic Device
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Development of a 3D Graphene Electrode Dielectrophoretic Device

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In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy
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In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy

Published on: September 12, 2018

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関連する実験動画

Last Updated: Sep 30, 2025

AC Electrokinetic Phenomena Generated by Microelectrode Structures
20:38

AC Electrokinetic Phenomena Generated by Microelectrode Structures

Published on: July 28, 2008

11.6K
Development of a 3D Graphene Electrode Dielectrophoretic Device
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Development of a 3D Graphene Electrode Dielectrophoretic Device

Published on: June 22, 2014

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In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy
09:36

In Situ Lithiated Reference Electrode: Four Electrode Design for In-operando Impedance Spectroscopy

Published on: September 12, 2018

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科学分野:

  • 凝縮物質物理学
  • 材料科学
  • 固体化学

背景:

  • 理想的なカゴメ帯は,ディラクの円と平らな帯を特徴としており,新しい物理学にとって重要であるが,既存のカゴメ材料には存在しない.
  • 報告されたカゴメ系における複雑な電子のジャンプは,理想的なバンド構造を遮断する.

研究 の 目的:

  • 非カゴム材料で理想的なカゴム帯を達成するための新しい方法を提案する.
  • 理想的なカゴム帯特性を有する新しい安定した2Dカゴム電極を予測する.

主な方法:

  • 新しい2Dカゴメ電極の理論的予測
  • 電子帯域構造の計算分析
  • 圧力下での超伝導と電荷密度波の性質の調査.

主要な成果:

  • 理想的なカゴム帯構造を示す2Dカゴム電極,Li5SiとLi5Snの予測
  • トポロジカルなディラック円,ヴァン・ホーブ・シンギュラリティ,フラットバンドの識別.
  • Li5Siにおける超伝導性の発見,圧力によって調節可能な移行温度,および圧力誘発の電荷密度波相移行.

結論:

  • カゴメ電極は,実験的にアクセス可能な材料で理想的なカゴメ帯を実現するための実行可能な経路を提供します.
  • Li5SiとLi5Snは,基礎物理学の研究と潜在的な応用のための有望なプラットフォームです.
  • 奇妙な電子特性を備えた材料を 設計するための新しい戦略を提示しています