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相关概念视频

Colloids and Suspensions01:17

Colloids and Suspensions

1.8K
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 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...
1.8K
Colloids03:22

Colloids

17.5K
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...
17.5K
Colloidal precipitates01:09

Colloidal precipitates

582
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...
582

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Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly
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根据形态学量身定制的动态状态转换在主动-被动的体组合中.

Nan Yu1,2, Zameer H Shah1,2, Mingcheng Yang3,4,5

  • 1Institute for Advanced Study, Shenzhen University, 518060, Shenzhen, China.

Research (Washington, D.C.)
|January 25, 2024
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概括
此摘要是机器生成的。

研究人员通过调整它们的形状和大小,在活性和被动体颗粒的混合物中发现了新的动态行为. 这些发现为新型应用提供了控制活性物质系统的战略.

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科学领域:

  • 合体和接口科学科学
  • 软物质物理学 软物质物理学
  • 活性物质系统的活性物质系统

背景情况:

  • 活性和被动的体混合物提供了超出平衡热力学范围的复杂状态.
  • 控制这些系统中的动态转换仍然是一个重大挑战.

研究的目的:

  • 探索积极-被动的合体组合中的多样化的动态行为.
  • 调查粒子形态和大小在决定动态状态中的作用.
  • 在不同的动态制度之间建立可控的过渡战略.

主要方法:

  • 使用化学推进的雪人样活性合体和被动球形颗粒.
  • 系统调整颗粒的形状,大小和组成.
  • 将实验观测与中等尺度动力学模拟进行比较.

主要成果:

  • 观察到主动-被动组件 (1:1比率) 的不同转换和轨道状态.
  • 揭示了持久的"8"式循环运动和跳跃动力学,用于一个活性粒子和两个被动粒子的组合.
  • 通过活性合体形状和被动颗粒大小控制的经过证明的形态定制过渡.

结论:

  • 揭示了积极-被动的体系统中的各种新动态状态.
  • 建立了动态控制的形态依赖的过渡策略.
  • 突出了开发具有前所未有的功能的先进微机的潜在应用.