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

1.2K
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.
1.2K
Atomic Nuclei: Nuclear Spin State Population Distribution01:14

Atomic Nuclei: Nuclear Spin State Population Distribution

2.3K
Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
2.3K
Spin–Spin Coupling: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

1.4K
Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
1.4K
Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)01:22

Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)

1.4K
Vicinal or three-bond coupling is commonly observed between protons attached to adjacent carbons. Here, nuclear spin information is primarily transferred via electron spin interactions between adjacent C‑H bond orbitals. This generally favors the antiparallel arrangement of spins, so 3J values are usually positive.
The extent of coupling depends on the C‑C bond length, the two H‑C‑C angles, any electron-withdrawing substituents, and the dihedral angle between the involved orbitals. The...
1.4K
NMR Spectroscopy: Spin–Spin Coupling01:08

NMR Spectroscopy: Spin–Spin Coupling

2.9K
The spin state of an NMR-active nucleus can have a slight effect on its immediate electronic environment. This effect propagates through the intervening bonds and affects the electronic environments of NMR-active nuclei up to three bonds away; occasionally, even farther. This phenomenon is called spin–spin coupling or J-coupling. Coupling interactions are mutual and result in small changes in the absorption frequencies of both nuclei involved. While nuclei of the same element are involved...
2.9K
Atomic Nuclei: Types of Nuclear Relaxation01:28

Atomic Nuclei: Types of Nuclear Relaxation

882
Nuclear relaxation restores the equilibrium population imbalance and can occur via spin–lattice or spin–spin mechanisms, which are first-order exponential decay processes.
In spin–lattice or longitudinal relaxation, the excited spins exchange energy with the surrounding lattice as they return to the lower energy level. Among several mechanisms that contribute to spin–lattice relaxation, magnetic dipolar interactions are significant. Here, the excited nucleus transfers...
882

You might also read

Related Articles

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

Sort by
Same author

Flatband Resonance Enhanced Second-Harmonic Generation in Thin-Film Lithium Niobate Moiré Microcavity.

Nano letters·2026
Same author

Metasurface-Enabled On-Chip Three-Dimensional Optical Manipulation.

ACS nano·2026
Same author

Multifaceted roles of miR‑124 in cancer: Molecular mechanisms and clinical prospects (Review).

International journal of oncology·2026
Same author

Ultraprecision, high-capacity, and wide-gamut structural colors enabled by a mixture probability sampling network.

Light, science & applications·2026
Same author

Lasing-like dynamics with virtual gain driven by complex-frequency excitations.

Nature communications·2026
Same author

Microbiota-fibroblast crosstalk represents the missing link in skin barrier dysfunction and fibrosis.

The British journal of dermatology·2026
Same journal

Intranasal DNA nanocarrier vaccines with surface-patterned antigens enhance efficacy against respiratory syncytial virus.

Nature materials·2026
Same journal

An artificial neuromorphic interface for auditory restoration.

Nature materials·2026
Same journal

Seamless biointerfaces in devices.

Nature materials·2026
Same journal

Shaping the future of quantum technology.

Nature materials·2026
Same journal

Quantum tunnelling and leakage current across two-dimensional materials.

Nature materials·2026
Same journal

High-precision memristor-based computing.

Nature materials·2026
See all related articles

Related Experiment Video

Updated: Jan 11, 2026

Site Directed Spin Labeling and EPR Spectroscopic Studies of Pentameric Ligand-Gated Ion Channels
11:19

Site Directed Spin Labeling and EPR Spectroscopic Studies of Pentameric Ligand-Gated Ion Channels

Published on: July 4, 2016

11.0K

Brownian spin-locking effect.

Xiao Zhang1, Peiyang Chen1,2, Mei Li1

  • 1State Key Laboratory of Photonics and Communications, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, China.

Nature Materials
|November 19, 2025
PubMed
Summary
This summary is machine-generated.

Researchers observed a novel spin-locking effect of light in disordered Brownian systems. This phenomenon, driven by nanoparticle spin-orbit interactions, enables new metrology applications for studying particle properties.

More Related Videos

Author Spotlight: Exploring Intrinsically Disordered Protein Dynamics Through NMR Relaxation Experiments
09:25

Author Spotlight: Exploring Intrinsically Disordered Protein Dynamics Through NMR Relaxation Experiments

Published on: November 1, 2024

2.6K
Covalent Immobilization of Proteins for the Single Molecule Force Spectroscopy
11:13

Covalent Immobilization of Proteins for the Single Molecule Force Spectroscopy

Published on: August 20, 2018

11.6K

Related Experiment Videos

Last Updated: Jan 11, 2026

Site Directed Spin Labeling and EPR Spectroscopic Studies of Pentameric Ligand-Gated Ion Channels
11:19

Site Directed Spin Labeling and EPR Spectroscopic Studies of Pentameric Ligand-Gated Ion Channels

Published on: July 4, 2016

11.0K
Author Spotlight: Exploring Intrinsically Disordered Protein Dynamics Through NMR Relaxation Experiments
09:25

Author Spotlight: Exploring Intrinsically Disordered Protein Dynamics Through NMR Relaxation Experiments

Published on: November 1, 2024

2.6K
Covalent Immobilization of Proteins for the Single Molecule Force Spectroscopy
11:13

Covalent Immobilization of Proteins for the Single Molecule Force Spectroscopy

Published on: August 20, 2018

11.6K

Area of Science:

  • Optics
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Brownian systems exhibit spatiotemporal disorder due to thermal fluctuations.
  • Light interacting with disordered media typically results in unpolarized and uncorrelated fields.

Purpose of the Study:

  • To report the observation of a large-scale spin-locking effect of light in a Brownian medium.
  • To explore the underlying mechanisms of spin-orbit interactions in light scattering within complex media.

Main Methods:

  • Observation of light scattering in a Brownian medium.
  • Analysis of spin polarization in diffused light regions perpendicular to incident wave momentum.

Main Results:

  • A large-scale spin-locking effect of light was observed.
  • Scattering divided into two diffusion regions, each linked to opposite nanoparticle spins.
  • Intrinsic spin-orbit interactions of nanoparticle scattering generate radiative spin fields.

Conclusions:

  • The observed effect provides an experimental platform for macroscale spin behavior of diffused light.
  • Potential applications include precision metrology for nanoparticle characterization.
  • Findings may inspire studies of analogous phenomena in other complex disordered systems.