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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...
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...
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...
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...

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関連する実験動画

Updated: May 20, 2026

Preparation of Janus Particles and Alternating Current Electrokinetic Measurements with a Rapidly Fabricated Indium Tin Oxide Electrode Array
09:55

Preparation of Janus Particles and Alternating Current Electrokinetic Measurements with a Rapidly Fabricated Indium Tin Oxide Electrode Array

Published on: June 23, 2017

ジャヌス (Janus) のコロイド型マッチスティック

Kundan Chaudhary1, Qian Chen, Jaime J Juárez

  • 1Department of Materials Science and Engineering and the Frederick Seitz Materials Research Laboratory, ‡Department of Physics, and §Department of Chemistry, University of Illinois , Urbana, Illinois 61801, United States.

Journal of the American Chemical Society
|August 1, 2012
PubMed
まとめ
この要約は機械生成です。

化学的にアニゾトロプ的,金色の尖ったシリカ棒,ヤヌスのマッチスティックと呼ばれるものが製造された. これらの粒子は溶液中の複雑な多足構造に自発的に組み合わさります.

さらに関連する動画

Manipulation of Color Patterns in Jumping Spiders for Use in Behavioral Experiments
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Preparation and 3D Tracking of Catalytic Swimming Devices
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Preparation and 3D Tracking of Catalytic Swimming Devices

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関連する実験動画

Last Updated: May 20, 2026

Preparation of Janus Particles and Alternating Current Electrokinetic Measurements with a Rapidly Fabricated Indium Tin Oxide Electrode Array
09:55

Preparation of Janus Particles and Alternating Current Electrokinetic Measurements with a Rapidly Fabricated Indium Tin Oxide Electrode Array

Published on: June 23, 2017

Manipulation of Color Patterns in Jumping Spiders for Use in Behavioral Experiments
09:03

Manipulation of Color Patterns in Jumping Spiders for Use in Behavioral Experiments

Published on: May 21, 2019

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Preparation and 3D Tracking of Catalytic Swimming Devices

Published on: July 1, 2016

科学分野:

  • マテリアルサイエンス 材料科学
  • コロイド科学 コロイド科学
  • ナノテクノロジー ナノテクノロジー

背景:

  • 化学的および形状アニゾトロプ的コロイドは,高度な材料にとって極めて重要です.
  • アニゾトロピック粒子の自己組み立てを制御することは困難です.

研究 の 目的:

  • 新しいジャヌスのマッチスティックコロイドを製造し,特徴づけること.
  • これらのアニゾトロプ的粒子の自己組み立て行動を調査するために.

主な方法:

  • 電気フィールドの調整,結晶化,マイクロコンタクト印刷,選択的金属化を含む多段階の製造.
  • 水溶液で自己組み立てを直接観察する.

主要な成果:

  • シリカ・ゴールド・ジャヌス・マッチスティック・コロイドの製造に成功.
  • マルチポッド構造 (二足,三足,四足) に自己組み立ての観察.
  • 組み立てられた構造物の調整番号とパッチ角度の変動.

結論:

  • Janusのマッチスティックは,複雑なコロイドアセンブリのための多用途な構成要素です.
  • 自己組み立てプロセスは,構造形成のコントロールを提供します.