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Related Concept Videos

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...
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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 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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An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by
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When an oscillator is forced with a periodic driving force, the motion may seem chaotic. The motions of such oscillators are known as transients. After the transients die out, the oscillator reaches a steady state, where the motion is periodic, and the displacement is determined.
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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...
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In the real world, oscillations seldom follow true simple harmonic motion. A system that continues its motion indefinitely without losing its amplitude is termed undamped. However, friction of some sort usually dampens the motion, so it fades away or needs more force to continue. For example, a guitar string stops oscillating a few seconds after being plucked. Similarly, one must continually push a swing to keep a child swinging on a playground.
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Synthesis and Characterization of Supramolecular Colloids
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Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

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Self-oscillating synchronematic colloids.

Sergi G Leyva1,2, Zhengyan Zhang3, Monica Olvera de la Cruz4,5,6

  • 1Center for Computation and Theory of Soft Materials, Northwestern University, Evanston, IL, USA.

Nature Communications
|January 23, 2026
PubMed
Summary
This summary is machine-generated.

Researchers studied Quincke colloids, self-oscillating units, and discovered a new collective order called synchrony. This order links particle movement, orientation, and oscillation, enabling adaptive material design.

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Area of Science:

  • Physics
  • Materials Science
  • Complex Systems

Background:

  • Self-oscillators are common in nature and engineering, enabling coordination.
  • Interactions between mobile, rotating oscillators can lead to novel organizational patterns.
  • Understanding emergent collective behavior in active matter is a key scientific challenge.

Purpose of the Study:

  • To investigate collective behavior in populations of Quincke colloids as self-oscillating units.
  • To explore the emergence of new forms of order driven by coupled spatial and orientational dynamics.
  • To establish Quincke colloids as a model system for active oscillatory matter.

Main Methods:

  • Experimental studies on populations of Quincke colloids.
  • Computational simulations of interacting Quincke colloid dynamics.
  • Theoretical analysis using the framework of weakly coupled oscillators.

Main Results:

  • Quincke colloids exhibit synchronized oscillations and aligned orientations due to hydrodynamic interactions.
  • A novel collective order, termed synchrony, emerges from coupled phase and orientation dynamics.
  • Global synchronization and circular alignment are observed in crystalline clusters, with collective frequency scaling with cluster size.

Conclusions:

  • Quincke colloids serve as a valuable model for active oscillatory matter.
  • Synchronization, alignment, and structure co-emerge, governed by particle configuration.
  • This work provides a framework for designing adaptive, frequency-tunable materials.