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相关概念视频

Coagulation01:06

Coagulation

1.2K
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...
1.2K
Colloids and Suspensions01:17

Colloids and Suspensions

3.0K
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...
3.0K
Colloids03:22

Colloids

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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...
20.5K
Colloidal precipitates01:09

Colloidal precipitates

4.7K
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...
4.7K
Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

762
Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
762
Precipitate Formation and Particle Size Control01:16

Precipitate Formation and Particle Size Control

5.1K
In precipitation gravimetry, the precipitating agent should react specifically or selectively with the analyte. While a specific reagent reacts with the analyte alone, a selective reagent can react with a limited number of chemical species.
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
5.1K

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Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
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Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

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可调的合体蜂群器与水力动力合器.

Veit-Lorenz Heuthe1, Priyanka Iyer2, Gerhard Gompper2

  • 1Fachbereich Physik, Universität Konstanz, Konstanz, Germany.

Nature communications
|December 8, 2025
PubMed
概括
此摘要是机器生成的。

研究人员使用反控制的体颗粒创建了一个可控制的群体系统. 该系统展示了同步和空间动态如何共同发展,从而导致活体物质的新型集体行为.

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科学领域:

  • 物理 物理学 物理
  • 活动物质物理学 活动物质物理学
  • 复杂的系统复杂的系统.

背景情况:

  • 集群器整合了集群和同步,这对于空间和内部动力学相结合的系统至关重要.
  • 现有的理论模型缺乏可调节合的实验验证.
  • 应用范围跨越生物系统和工程机器人群.

研究的目的:

  • 通过实验实现和控制群体控制系统.
  • 研究同步和空间动态的共同进化.
  • 探索新的集体状态和动态制度.

主要方法:

  • 使用反控制的,自行推进的环状颗粒绕着参考点运行.
  • 采用水力动力学相互作用进行粒子间合.
  • 操纵一个单一的控制参数来调整吸引力和排斥力之间的相互作用.
  • 在模拟中内置了滑动器和滑力.

主要成果:

  • 证明了同步和空间动态的共同进化.
  • 观察到的集体状态:同步的集群,旋转的聚合物和分散的相.
  • 实现了与静态相互作用无法访问的动态模式.
  • 确定了一个新的依赖同步的交互通道.

结论:

  • 开发的平台提供了一个可控制的实验测试平台,用于swarmalator物理.
  • 这些发现为自我组织的活性物质提供了洞察力.
  • 这项工作为设计新的自我组织活性物质系统铺平了道路.