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関連する概念動画

The Colloidal State01:29

The Colloidal State

45
The formation of a colloidal system is exemplified by an aqueous solution containing Cl− ions is introduced to another containing Ag+ ions, resulting in the precipitation of solid AgCl as extremely tiny crystals. Instead of settling out as a filterable precipitate, these crystals remain suspended in the liquid, showcasing a colloidal system.A colloidal system involves colloidal particles within the approximate range of 1 to 1000 nm in at least one dimension, dispersed in a medium called...
45
Ionic Crystal Structures02:42

Ionic Crystal Structures

19.3K
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...
19.3K
Colloidal precipitates01:09

Colloidal precipitates

6.6K
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...
6.6K
Colloids03:22

Colloids

21.8K
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...
21.8K
Crystal Growth: Principles of Crystallization01:25

Crystal Growth: Principles of Crystallization

5.5K
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...
5.5K
Recrystallization: Solid–Solution Equilibria01:10

Recrystallization: Solid–Solution Equilibria

4.2K
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...
4.2K

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A Microfluidic Approach for the Study of Ice and Clathrate Hydrate Crystallization
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A Microfluidic Approach for the Study of Ice and Clathrate Hydrate Crystallization

Published on: August 18, 2022

3.6K

クラトレートコロイド結晶

Haixin Lin1,2, Sangmin Lee3, Lin Sun2,4

  • 1Department of Chemistry, Northwestern University, Evanston, IL 60208, USA.

Science (New York, N.Y.)
|March 4, 2017
PubMed
まとめ
この要約は機械生成です。

研究者らは DNAプログラム可能な三角形バイピラミッドの組み立てを使用して 複雑なコロイド結晶を作り出しました これらの洗練された構造は ナノ粒子の自己組み立てと 材料設計における 重要な進歩を表しています

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関連する実験動画

Last Updated: Mar 6, 2026

A Microfluidic Approach for the Study of Ice and Clathrate Hydrate Crystallization
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A Microfluidic Approach for the Study of Ice and Clathrate Hydrate Crystallization

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科学分野:

  • 材料科学
  • ナノテクノロジー
  • バイオテクノロジー

背景:

  • プログラム可能なDNAアセンブリにより,様々な対称性を持つコロイド結晶の合成が可能である.
  • 以前の取り組みは,複雑さを制限する小さなユニットセルを持つ構造に限定されていました.

研究 の 目的:

  • 複合的なクラスレート構造に DNA 改造された三角形バイピラミッドを組み立てる
  • 単純な単体細胞を超えた 複雑な構造の形成を研究する

主な方法:

  • DNA改変した三角形バイピラミッドを ブロックとして使った
  • 電子顕微鏡を用いて構造を特徴づけている.
  • 組み立ての原理を理解するために分子シミュレーションと幾何学分析を適用しました.

主要な成果:

  • 三角形の二ピラミッドを クラトラート構造に組み立てました
  • 大きな単一領域と多領域の材料を含む少なくとも3つの異なる構造の形成が観察されました.
  • 特定された有序集合はクラトラートに構造的に同等である.

結論:

  • ナノ粒子の構成要素の形とDNAの機能化は 複雑なクラスレート構造の形成を決定する.
  • これらの発見は,これまでにプログラム可能なアセンブリによって達成された最も洗練されたアーキテクチャを表しています.
  • この研究は,自己組み立てによる複雑なナノ材料の設計原理を進めている.