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関連する概念動画

Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
Ionic Crystal Structures02:42

Ionic Crystal Structures

Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Metallic Solids02:37

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
Valence Bond Theory02:42

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
Superconductor01:24

Superconductor

A substance that reaches superconductivity, a state in which magnetic fields cannot penetrate, and there is no electrical resistance, is referred to as a superconductor. In 1911, Heike Kamerlingh Onnes of Leiden University, a Dutch physicist, observed a relation between the temperature and the resistance of the element mercury. The mercury sample was then cooled in liquid helium to study the linear dependence of resistance on temperature. It was observed that, as the temperature decreased, the...
Semiconductors01:22

Semiconductors

There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...

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関連する実験動画

Updated: Jul 27, 2026

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
08:12

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures

Published on: December 5, 2015

Na{1+x}Zr{2}Si{x}P{3-x}O{12) の超イオン導体に対する完全なインテリオンポテンシャル

P Padma Kumar1, Subramanian Yashonath

  • 1Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore - 560012, India.

Journal of the American Chemical Society
|April 11, 2002
PubMed
まとめ

研究者らは,シリケートナトリウムジルコンシリケート,リン酸塩などの無機固体の新しい計算モデルを開発した. このモデルは,これらの材料の構造と伝導性を正確に予測し,同様の複雑な無機化合物を研究するための道を切り開きます.

科学分野:

  • 固体化学と材料科学. 固体化学と材料科学. 固体化学と材料科学.
  • コンピューティング材料科学と凝縮物質物理学.

背景:

  • 無機固体は,通常,無限のフレームワークを形成する相互接続された八面体および四面体単位を特徴としています.
  • コンピューターシミュレーションは,有機またはバイオ分子と比較して,無機固体を研究するために十分に活用されていません.
  • ナトリウムジルコンシリケートリン酸塩酸 (Na1+x) Zr2SixP3−x) O12) は,ZrO6八面体と (Si/P) O4四面体で構成される代表的な無機物質である.

研究 の 目的:

  • 無機固体の総合的なインテリオニックポテンシャルを開発し,検証する.
  • Na{1+x) Zr{2}Si{x) P{3-x) O{12}の構造と伝導性を正確に再現する.

主な方法:

  • 完全なインテリオニックポテンシャルモデルの開発.
  • 計算シミュレーション技術を活用する.

主要な成果:

  • 開発されたインテリオンポテンシャルは,Na 1+x) Zr 2Si x) P 3x) O 12の既知の結晶構造を成功裏に再現します.
  • このモデルは,これらの無機固体材料のイオン伝導性を正確に予測します.
  • この研究は,この類の材料に対する計算方法の使用を検証しています.

さらに関連する動画

Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics
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Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics

Published on: September 28, 2016

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
10:36

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

Published on: April 12, 2018

関連する実験動画

Last Updated: Jul 27, 2026

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures
08:12

Ohmic Contact Fabrication Using a Focused-ion Beam Technique and Electrical Characterization for Layer Semiconductor Nanostructures

Published on: December 5, 2015

Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics
13:58

Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics

Published on: September 28, 2016

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
10:36

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

Published on: April 12, 2018

結論:

  • 無機固体の研究のために,強固なインテリオニックポテンシャルが確立されています.
  • この計算によるアプローチは,より広い範囲の無機枠組材料の調査に希望を示しています.
  • この発見は,無機固体化学におけるシミュレーションの利用を増やすことを奨励する.