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関連する概念動画

Surface Tension, Capillary Action, and Viscosity02:57

Surface Tension, Capillary Action, and Viscosity

Surface Tension
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
Colloids03:22

Colloids

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...
Colloids and Suspensions01:17

Colloids and Suspensions

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 visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
Colloidal precipitates01:09

Colloidal precipitates

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...
Coagulation01:06

Coagulation

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...
The Colloidal State01:29

The Colloidal State

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 the...

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関連する実験動画

Updated: May 11, 2026

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
10:56

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures

Published on: May 21, 2014

柔らかいコロイドは,強いガラスを作ります.

Johan Mattsson1, Hans M Wyss, Alberto Fernandez-Nieves

  • 1Department of Physics and Harvard School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA. johanm@chalmers.se

Nature
|November 6, 2009
PubMed
まとめ
この要約は機械生成です。

変形可能なコロイド粒子は,分子液体を反映して,可変の脆さを示します. 粒子の弾性に関連したこの発見は,ガラスの形成と材料の動的拘束に関する新しい洞察を提供します.

さらに関連する動画

Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

Glass-Based Devices to Generate Drops and Emulsions
08:45

Glass-Based Devices to Generate Drops and Emulsions

Published on: April 5, 2022

関連する実験動画

Last Updated: May 11, 2026

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
10:56

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures

Published on: May 21, 2014

Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

Glass-Based Devices to Generate Drops and Emulsions
08:45

Glass-Based Devices to Generate Drops and Emulsions

Published on: April 5, 2022

科学分野:

  • マテリアルサイエンス 材料科学
  • ソフトマター物理学 ソフトマター物理学
  • 物理化学 物理化学

背景:

  • コロイド懸浮液のガラス形成は,分子材料との類似性を共有し,温度 (T) に類似する体積分数 (phi) によって駆動されます.
  • 硬球コロイドは脆弱性が限られており,様々なガラスの移行行動を研究する際の有用性を制限しています.
  • Tまたは phiに対する粘度またはリラックス時間感度の尺度である脆さは,ガラス形成液体における動的停止を理解するために重要である.

研究 の 目的:

  • 変形可能なコロイド粒子が,分子液体で観察される多様な脆性の振る舞いを複製できるかどうかを調査する.
  • コロイド系における粒子の弾力性と脆さの関係を探求する.
  • ガラスの形成を研究するための汎用的なモデルとしてコロイドサスペンションを確立する.

主な方法:

  • 固定温度での濃度依存による変形可能なコロイド粒子を研究した.
  • 粒子弾力性と脆さの関係を分析した.
  • 弾力性と脆弱性を相関させるため,分子システムにおける類似効果を調査した.

主要な成果:

  • 変形可能なコロイド粒子は,分子液体と同等の脆弱性を示した.
  • 粒子の脆さは,個々のコロイド粒子の弾性特性によって決定されていることが判明しました.
  • 弾力性と脆さの間の直接的な相関は,分子システムで観察されました.

結論:

  • 変形可能なコロイド式サスペンションは,より広い脆弱性スペクトルを提供し,硬球型モデルの限界を克服します.
  • コロイド粒子の弾力性は,システムの脆弱性の重要な決定因子です.
  • この研究は,コロイドと分子ガラス科学の間のギャップを埋めて,ダイナミックアストの理解を深める.