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相关概念视频

Colloids03:22

Colloids

17.2K
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...
17.2K
Conformations of Cyclohexane02:11

Conformations of Cyclohexane

12.2K
Cyclohexane does not exist in a planar form due to the high angle and torsional strain it would experience in the planar structure. Instead, it adopts non-planar chair and boat conformations.
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
12.2K
Colloids and Suspensions01:17

Colloids and Suspensions

3.4K
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 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...
3.4K
Colloidal precipitates01:09

Colloidal precipitates

5.7K
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...
5.7K
Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity01:15

Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity

827
Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
827
The Colloidal State01:29

The Colloidal State

189
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...
189

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相关实验视频

Updated: May 6, 2026

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
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Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures

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在曲的合体单层中对几何挫折感.

Yilong Han1, Yair Shokef, Ahmed M Alsayed

  • 1Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, Pennsylvania 19104, USA.

Nature
|December 19, 2008
PubMed
概括

在合体球体中的几何挫折创造了独特的曲格子. 这种软物质系统揭示了新的动态和基本状态,与理论模型不同.

科学领域:

  • 软物质物理学 软物质物理学
  • 凝聚物质物理学 凝聚物质物理学
  • 统计力学就是统计力学.

背景情况:

  • 几何丧发生在格子结构阻碍能量最小化时,导致像旋转冰这样的复杂状态.
  • 这些系统表现出退化的基本状态和独特的物理性质.

研究的目的:

  • 为了研究一个简单的,可调节的软物质系统,表现出几何挫折.
  • 将实验结果与理论模型进行比较,特别是反铁磁Ising模型.

主要方法:

  • 直径可调节的微凝球体自组装成平行墙壁之间的三角格子.
  • 将实验观测与理论分析结合起来,研究粒子动力学和晶格扭曲.

主要成果:

  • 体系统形成了一个曲的三角格子,有着上下排序的位移,模仿伊辛格模型.
  • 观察到的内平面格子扭曲部分缓解了挫折感,导致了曲的条纹地面状态.
  • 该系统表现出不够广泛的,与伊辛格模型预测的广泛的形成鲜明对比.

结论:

  • 这种可调节的软物质系统为研究几何挫折动态提供了一个可视化的模型.
  • 观察到的基本状态和与标准的理论预测不同,突出显示出独特的新兴行为.

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Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy

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Microtensiometer for Confocal Microscopy Visualization of Dynamic Interfaces

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Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
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Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures

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Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy

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  • 该系统提供了对热激发和挫败系统缺陷的洞察.