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

Paramagnetism01:30

Paramagnetism

3.0K
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...
3.0K
Diamagnetism01:26

Diamagnetism

2.9K
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
2.9K
Motion Of A Charged Particle In A Magnetic Field01:22

Motion Of A Charged Particle In A Magnetic Field

6.6K
A charged particle experiences a force when moving through a magnetic field. Consider the field to be uniform and the charged particle to move perpendicular to it. If the field is in a vacuum, the magnetic field is the dominant factor determining the motion. Since the magnetic force is perpendicular to the direction of motion, a charged particle follows a curved path. The particle continues to follow this curved path until it forms a complete circle. Another way to look at this is that the...
6.6K
Atomic Nuclei: Nuclear Magnetic Moment00:59

Atomic Nuclei: Nuclear Magnetic Moment

3.1K
All atomic nuclei are positively charged. When they have a nonzero spin, they behave like rotating charges. As a consequence of their charge and spin, these nuclei generate a magnetic field (B). This, in turn, gives rise to a magnetic moment (μ), which is randomly oriented in the absence of an external magnetic field. When an external magnetic field (B0) is applied, the magnetic moment vectors can align with the field or against it in 2 + 1 orientations. A hydrogen nucleus, which is just a...
3.1K
Potential Due to a Magnetized Object01:24

Potential Due to a Magnetized Object

752
Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...
752
π Electron Effects on Chemical Shift: Overview01:27

π Electron Effects on Chemical Shift: Overview

1.6K
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,...
1.6K

You might also read

Related Articles

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

Sort by
Same author

Influence of lattice expansion on Cr ferromagnetism in Ce<sub>(1-x)</sub>La<sub>(x)</sub>CrGe<sub>3</sub>compounds revealed by atomic-scale measurements.

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same author

Glycoengineered Recombinant Alpha1-Antitrypsin Results in Comparable In Vitro and In Vivo Activities to Human Plasma-Derived Protein.

Biotechnology and bioengineering·2026
Same author

Microscale Assemblies of Magnetic Nanoparticles Produced by Dip-Coating and Lift-Off With Dissolvable Templates.

Nano select : open access·2026
Same author

RNA binding motif protein RBM41 promotes colorectal tumorigenesis by impeding the maturation of NDRG1 pre-mRNA.

Cell death discovery·2026
Same author

Probing interlayer bromide in solvent intercalation of layered yttrium hydroxide via <sup>79/81</sup>Br SSNMR spectroscopy.

Solid state nuclear magnetic resonance·2026
Same author

Magnetic Anisotropy Dominates over Physical and Magnetic Structure in Performance of Magnetic Nanoflowers.

Small structures·2026

Related Experiment Video

Updated: Jan 9, 2026

Using Polystyrene-block-polyacrylic acid-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization
09:02

Using Polystyrene-block-polyacrylic acid-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization

Published on: July 9, 2015

12.7K

Magnetodynamics of short nanoparticle chains.

Thinh Q Bui1, Samuel D Oberdick2,3, Frank M Abel4

  • 1Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA. thinh.bui@nist.gov.

Scientific Reports
|December 8, 2025
PubMed
Summary

Researchers studied how iron oxide nanoparticle chains switch magnetically. They found specific physical mechanisms explaining the chain

Keywords:
Magnetic nanoparticlesMagnetic particle imagingMagnetization dynamicsMagnetometryNanoscale assembly

More Related Videos

Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
10:45

Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition

Published on: February 5, 2022

4.6K
Simultaneous Synthesis of Single-walled Carbon Nanotubes and Graphene in a Magnetically-enhanced Arc Plasma
09:48

Simultaneous Synthesis of Single-walled Carbon Nanotubes and Graphene in a Magnetically-enhanced Arc Plasma

Published on: February 2, 2012

15.7K

Related Experiment Videos

Last Updated: Jan 9, 2026

Using Polystyrene-block-polyacrylic acid-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization
09:02

Using Polystyrene-block-polyacrylic acid-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization

Published on: July 9, 2015

12.7K
Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
10:45

Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition

Published on: February 5, 2022

4.6K
Simultaneous Synthesis of Single-walled Carbon Nanotubes and Graphene in a Magnetically-enhanced Arc Plasma
09:48

Simultaneous Synthesis of Single-walled Carbon Nanotubes and Graphene in a Magnetically-enhanced Arc Plasma

Published on: February 2, 2012

15.7K

Area of Science:

  • Nanomaterials Science
  • Magnetism
  • Biomedical Engineering

Background:

  • External fields drive nanoparticle assembly, leading to complex behaviors.
  • Understanding the dynamics and structure of these assemblies is crucial but challenging.
  • Iron oxide nanoparticle chains form under oscillating and pulsed magnetic fields.

Purpose of the Study:

  • To elucidate the physical mechanisms governing magnetic switching in linear nanoparticle chains.
  • To connect the dynamics of chain switching to the behavior of individual particles.
  • To establish the structure-dynamics relationship in magnetically driven nanoparticle assemblies.

Main Methods:

  • Cryogenic transmission electron microscopy (Cryo-TEM) for structural analysis.
  • Magnetic relaxometry to determine magnetic switching time constants.
  • Extensive micromagnetic simulations to model physical mechanisms.

Main Results:

  • Cryo-TEM revealed ordered few-particle linear chain structures.
  • Magnetic relaxometry identified multiple time constants for magnetic switching (μs to s).
  • Micromagnetic simulations correlated specific physical mechanisms with observed time constants.

Conclusions:

  • Detailed understanding of magnetic switching mechanisms in nanoparticle chains achieved.
  • Established structure-property relationships for iron oxide nanoparticle assemblies.
  • Findings will accelerate optimization of nanomaterials for biomedical applications like magnetic particle imaging and hyperthermia.