Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

The Colloidal State

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...

The de Broglie Wavelength

The de Broglie Wavelength

In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...

Colloids and Suspensions

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...

Colloidal precipitates

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...

Colloids

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...

Atomic Nuclei: Nuclear Relaxation Processes

Atomic Nuclei: Nuclear Relaxation Processes

In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis, the precessing magnetic moments are randomly oriented around the z-axis. This...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Local Dzyaloshinskii-Moriya Interactions Driving Quasi-2D Magnetism in a Centrosymmetric Nanoskyrmion Material.

Physical review letters·2025

Same author

Anisotropic Skyrmion and Multi-q Spin Dynamics in Centrosymmetric Gd_{2}PdSi_{3}.

Physical review letters·2025

Same author

Dynamics and Topology of Symmetry Breaking with Skyrmions.

Physical review letters·2024

Same author

<i>Enterobius Vermicularis</i> Infection: A Cross-sectional Study in Preschool and School Children in the North-Western Part of Slovenia.

Helminthologia·2023

Same author

Origin of Magnetic Ordering in a Structurally Perfect Quantum Kagome Antiferromagnet.

Physical review letters·2020

Same author

Field-Induced Instability of a Gapless Spin Liquid with a Spinon Fermi Surface.

Physical review letters·2018

Search research articles

Related Experiment Video

Updated: Jun 6, 2026

Preparation of Liquid Crystal Networks for Macroscopic Oscillatory Motion Induced by Light

Preparation of Liquid Crystal Networks for Macroscopic Oscillatory Motion Induced by Light

Published on: September 20, 2017

Light-driven oscillations of entangled nematic colloidal chains.

M Gomilšek¹, D Seč, M Skarabot

¹Jožef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia.

The European Physical Journal. E, Soft Matter

|November 9, 2010

Summary

Laser tweezers drove entangled colloidal particles in liquid crystals. Collective particle motion showed high damping above 0.5Hz, matching theoretical models.

More Related Videos

Forming, Confining, and Observing Microtubule-Based Active Nematics

Forming, Confining, and Observing Microtubule-Based Active Nematics

Published on: January 13, 2023

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures

Published on: May 20, 2014

Related Experiment Videos

Last Updated: Jun 6, 2026

Preparation of Liquid Crystal Networks for Macroscopic Oscillatory Motion Induced by Light

Preparation of Liquid Crystal Networks for Macroscopic Oscillatory Motion Induced by Light

Published on: September 20, 2017

Forming, Confining, and Observing Microtubule-Based Active Nematics

Forming, Confining, and Observing Microtubule-Based Active Nematics

Published on: January 13, 2023

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures

Published on: May 20, 2014

Area of Science:

Soft matter physics
Colloidal science
Liquid crystal physics

Background:

Nematic liquid crystals exhibit unique anisotropic properties.
Colloidal particles in liquid crystals can form entangled chains.
Laser tweezers offer precise control over microscopic objects.

Purpose of the Study:

To investigate the driven oscillations of entangled colloidal particles in a nematic liquid crystal (5CB).
To quantify the amplitude and phase of light-driven particle motion.
To compare experimental results with theoretical models of coupled particle dynamics.

Main Methods:

Utilized laser tweezers to induce and control oscillations of colloidal particles.
Employed optical microscopy to determine the amplitude and phase of individual particle motion.
Studied the collective dynamics of 4.8μm silica particles in 5CB.

Main Results:

Determined light-driven oscillation parameters for individual colloidal particles.
Observed highly damped collective motion of silica particles above a driving frequency of 0.5Hz.
Obtained qualitative agreement between experimental data and an effective bead-spring model.

Conclusions:

The study successfully characterized the oscillatory behavior of entangled colloidal particles in 5CB.
Viscous damping and hydrodynamic coupling are significant factors in collective particle motion.
The bead-spring model provides a useful framework for understanding these complex systems.