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関連する概念動画

Crystal Growth: Principles of Crystallization01:25

Crystal Growth: Principles of Crystallization

Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent – the...
Determination of Crystal Structures01:29

Determination of Crystal Structures

In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
Imperfections in Crystal Structure: Point, Line and Plane Defects01:25

Imperfections in Crystal Structure: Point, Line and Plane Defects

A perfect crystal, in theory, has a uniform structure with the same unit cell and lattice points throughout. However, any deviation from this periodic arrangement is known as an imperfection or defect. These defects can be categorized into three types: point, line, and plane defects.Point defects occur when there is a deviation from the ideal due to missing atoms, displaced atoms, or additional atoms. These imperfections might occur due to imperfect packing during crystallization or because of...
X-ray Crystallography02:18

X-ray Crystallography

The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
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...
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...

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Updated: May 22, 2026

Optimization of Crystal Growth for Neutron Macromolecular Crystallography
12:29

Optimization of Crystal Growth for Neutron Macromolecular Crystallography

Published on: March 13, 2021

方向特異的な相互作用は,指向的結合によって結晶の成長を制御する.

Dongsheng Li1, Michael H Nielsen, Jonathan R I Lee

  • 1Materials Science Division, Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA 94720, USA.

Science (New York, N.Y.)
|May 26, 2012
PubMed
まとめ
この要約は機械生成です。

オリエンテッド・アタッチメントは,ナノ粒子を並べて結晶の成長を促します. 直接観察は,特定の相互作用によって導かれる接触点での原子対原子の加算を明らかにします.

さらに関連する動画

Microfluidic Chips for In Situ Crystal X-ray Diffraction and In Situ Dynamic Light Scattering for Serial Crystallography
11:48

Microfluidic Chips for In Situ Crystal X-ray Diffraction and In Situ Dynamic Light Scattering for Serial Crystallography

Published on: April 24, 2018

On-Chip Crystallization and Large-Scale Serial Diffraction at Room Temperature
07:42

On-Chip Crystallization and Large-Scale Serial Diffraction at Room Temperature

Published on: March 11, 2022

関連する実験動画

Last Updated: May 22, 2026

Optimization of Crystal Growth for Neutron Macromolecular Crystallography
12:29

Optimization of Crystal Growth for Neutron Macromolecular Crystallography

Published on: March 13, 2021

Microfluidic Chips for In Situ Crystal X-ray Diffraction and In Situ Dynamic Light Scattering for Serial Crystallography
11:48

Microfluidic Chips for In Situ Crystal X-ray Diffraction and In Situ Dynamic Light Scattering for Serial Crystallography

Published on: April 24, 2018

On-Chip Crystallization and Large-Scale Serial Diffraction at Room Temperature
07:42

On-Chip Crystallization and Large-Scale Serial Diffraction at Room Temperature

Published on: March 11, 2022

科学分野:

  • マテリアルサイエンス 材料科学
  • ナノテクノロジー ナノテクノロジー
  • クリスタルグラフィーです.

背景:

  • オリエンテッド・アタッチメントは,溶液中の分子クラスターとナノ粒子にとって重要な結晶成長メカニズムです.
  • 正確な配列と固定メカニズムについては,まだ十分に理解されていない.

研究 の 目的:

  • 鉄酸化水酸化物ナノ粒子の指向的結合過程を直接観察し,解明する.
  • 粒子の配列のダイナミクスと,その後の固定メカニズムを確立するために.

主な方法:

  • 高解像度伝送電子顕微鏡 (HRTEM) が採用されました.
  • 液体細胞は,溶液中のナノ粒子の振る舞いのインシット観測を可能にするために利用されました.

主要な成果:

  • 観測されたナノ粒子は,完璧な格子マッチを達成するまで,継続的な回転と相互作用を経験します.
  • 素早いナノメートルの接触イベントを記録し,その後にインターフェースで原子ごとに原子を足した.
  • インターフェースの除去率は,ギブスの自由エネルギーと曲率と相関する.

結論:

  • 強烈で方向性のある相互作用は,指向付着による結晶の成長の主な原動力である.
  • この研究は,ナノスケールでの指向型結合のメカニズムに対する直接的な証拠を提供します.