Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

699
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.
699
π Electron Effects on Chemical Shift: Overview01:27

π Electron Effects on Chemical Shift: Overview

1.1K
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
1.1K
Paramagnetism01:30

Paramagnetism

2.6K
Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
2.6K
Atomic Nuclei: Magnetic Resonance01:05

Atomic Nuclei: Magnetic Resonance

716
The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
716
Valence Bond Theory02:42

Valence Bond Theory

9.0K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
9.0K
Colors and Magnetism03:02

Colors and Magnetism

12.2K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
12.2K

You might also read

Related Articles

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

Sort by
Same author

Engineering the Self-Assembly of Bacterial Microcompartment Shell Proteins via Charged Mutations.

ACS nano·2026
Same author

Solvent-Dependent Mechanical Response of De Novo Helix Repeat Proteins.

The journal of physical chemistry. B·2026
Same author

Mechanophore cross-linking enhances ballistic energy dissipation of polymers.

Nature·2026
Same author

Role of Polymer-Protein Interactions in the Dynamics of Polymer-Integrated Protein Crystals.

Journal of the American Chemical Society·2026
Same author

Electrostatically driven pattern formation in mixed charged-neutral multicomponent elastic membranes.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same author

Self-oscillating synchronematic colloids.

Nature communications·2026

Related Experiment Video

Updated: Aug 14, 2025

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

8.2K

Positional ordering induced by dynamic steric interactions in superparamagnetic rods.

Chase Austyn Brisbois1, Monica Olvera de la Cruz1,2,3

  • 1Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA. m-olvera@northwestern.edu.

Soft Matter
|January 12, 2023
PubMed
Summary

Precessing magnetic fields drive matter into far-from-equilibrium states. Simulations show steric interactions induce 1D ordering and phase separation in rod systems, advancing soft matter control.

More Related Videos

Paramagnetic Relaxation Enhancement for Detecting and Characterizing Self-Associations of Intrinsically Disordered Proteins
07:24

Paramagnetic Relaxation Enhancement for Detecting and Characterizing Self-Associations of Intrinsically Disordered Proteins

Published on: September 23, 2021

1.9K
Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
16:24

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

18.7K

Related Experiment Videos

Last Updated: Aug 14, 2025

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
09:06

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

8.2K
Paramagnetic Relaxation Enhancement for Detecting and Characterizing Self-Associations of Intrinsically Disordered Proteins
07:24

Paramagnetic Relaxation Enhancement for Detecting and Characterizing Self-Associations of Intrinsically Disordered Proteins

Published on: September 23, 2021

1.9K
Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
16:24

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

18.7K

Area of Science:

  • Soft Matter Physics
  • Non-equilibrium Statistical Mechanics
  • Computational Physics

Background:

  • Precessing magnetic fields can induce dynamic, far-from-equilibrium states in matter.
  • Understanding the behavior of elongated particles under external fields is crucial for soft matter science.

Purpose of the Study:

  • To predict and investigate 1D periodic ordering in systems of precessing rods.
  • To explore the role of steric interactions versus magnetic interactions in driving phase transitions.
  • To understand the influence of rod precession dynamics on ordering and phase behavior.

Main Methods:

  • Development of a molecular dynamics model incorporating explicit magnetic interactions.
  • Simulation of rods in a strong, fast precessing magnetic field using a purely steric model.
  • Analysis of phase transitions from disordered (nematic) to layered (smectic) phases.

Main Results:

  • Steric interactions alone drive rods from a nematic to a smectic phase.
  • The nematic-smectic transition density decreases significantly with increasing rod precession angle.
  • Phase separation is induced in binary rod mixtures due to steric interaction minimization.

Conclusions:

  • Steric interactions are sufficient to drive 1D ordering and phase separation in precessing rod systems.
  • The findings are generalizable to any force causing precession in elongated particles.
  • This work enhances the understanding and control of out-of-equilibrium soft matter systems.