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関連する概念動画

Metallic Solids02:37

Metallic Solids

20.3K
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....
20.3K
Colloidal precipitates01:09

Colloidal precipitates

4.6K
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
4.6K
Coagulation01:06

Coagulation

1.1K
Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
1.1K
Recrystallization: Solid–Solution Equilibria01:10

Recrystallization: Solid–Solution Equilibria

2.0K
Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
2.0K
Colloids03:22

Colloids

20.4K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
20.4K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

30.2K
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...
30.2K

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Updated: Jan 1, 2026

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

8.9K

コロイド結晶"合金"

Shunzhi Wang, Jingshan S Du, Nicolas J Diercks

    Journal of the American Chemical Society
    |December 17, 2019
    PubMed
    まとめ
    この要約は機械生成です。

    研究者らはDNAを改変したナノ粒子,プログラム可能な原子等価物 (PAE),電子等価物 (EE) を使用して"コロイド結晶合金"を作成しました. この突破により,先進的な材料の設計のための様々な合金相の予測可能な形成が可能になります.

    さらに関連する動画

    Synthesis and Characterization of Supramolecular Colloids
    09:26

    Synthesis and Characterization of Supramolecular Colloids

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    A Modular Microfluidic Technology for Systematic Studies of Colloidal Semiconductor Nanocrystals
    09:58

    A Modular Microfluidic Technology for Systematic Studies of Colloidal Semiconductor Nanocrystals

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    関連する実験動画

    Last Updated: Jan 1, 2026

    Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
    08:55

    Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

    Published on: June 7, 2018

    8.9K
    Synthesis and Characterization of Supramolecular Colloids
    09:26

    Synthesis and Characterization of Supramolecular Colloids

    Published on: April 22, 2016

    10.3K
    A Modular Microfluidic Technology for Systematic Studies of Colloidal Semiconductor Nanocrystals
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    A Modular Microfluidic Technology for Systematic Studies of Colloidal Semiconductor Nanocrystals

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    科学分野:

    • ナノテクノロジー
    • 材料科学
    • バイオ物理学

    背景:

    • DNAナノ粒子の結合は 超網の正確な組み立てを可能にします
    • コロイドの形成
    • イオン性
    • 段階は確立されていますが,
    • 合金
    • ステージ形成は難しいです.

    研究 の 目的:

    • デザインと合成
    • コロイド結晶合金
    • プログラム可能な原子等価 (PAE) として異なるサイズの金ナノ粒子を使用します.
    • 予測可能な合金相形成のための設計ガイドラインを確立する.

    主な方法:

    • 異なるサイズのDNA改変金ナノ粒子の合成
    • 電子同等体 (EEs) を備えたPAEの組み立て
    • 電子顕微鏡と小角X線散射 (SAXS) を使用した特徴付け.

    主要な成果:

    • 4つのコロイド合金クラスの形成が実証された:インタースティシャル,置換,相分離,およびインターメタリック.
    • 合金相形成に影響を与える主要なパラメータを特定した:PAEサイズ比,DNAカバー,ステキオメトリー,および解熱.
    • SAXSと電子顕微鏡を用いて相分離運動を調査した.

    結論:

    • プログラム可能なコロイド結晶合金を作るための枠組みを確立した.
    • 合金に関するヒューム・ロサリー規則に類似した化学設計ガイドラインを開発した.
    • コロイド合金の相行動の制御における運動学の重要性を強調した.