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Related Concept Videos

Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Atomic Nuclei: Magnetic Resonance01:05

Atomic Nuclei: Magnetic Resonance

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...
Atomic Nuclei: Nuclear Spin01:08

Atomic Nuclei: Nuclear Spin

All atomic particles possess an intrinsic angular momentum, or 'spin'. Electrons, protons, and neutrons each have a spin value of ½, although protons and neutrons in nuclei may have higher half-integer spins owing to energetic factors.
Atomic nuclei have a net nuclear spin, , which can have an integer or half-integer value. In atomic nuclei, the spins of protons are paired against each other but not with neutrons, and vice versa. Consequently, an even number of protons does not contribute to...
Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...
Atomic Nuclei: Nuclear Relaxation Processes01:23

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...
Nuclear Overhauser Enhancement (NOE)01:06

Nuclear Overhauser Enhancement (NOE)

Irradiation of a spin-active nucleus causes an increase or decrease in the signal intensity of neighboring nuclei that are not necessarily chemically bonded or involved in J-coupling. This phenomenon, called the nuclear Overhauser enhancement (NOE), results from through-space interactions between the nuclear spins. The NOE effect decreases with increasing internuclear distance and is generally not observed beyond 4 angstroms. In NOE, dipole-dipole interactions between neighboring spin-active...

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Related Experiment Video

Updated: May 19, 2026

High-Temperature and High-Pressure In situ Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy
08:55

High-Temperature and High-Pressure In situ Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy

Published on: October 9, 2020

Sensing single remote nuclear spins.

Nan Zhao1, Jan Honert, Bernhard Schmid

  • 13 Physikalisches Institut and Research Center SCOPE, University Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany.

Nature Nanotechnology
|September 4, 2012
PubMed
Summary
This summary is machine-generated.

Researchers detected and identified single nuclear spins using a nitrogen-vacancy center in diamond. This breakthrough enables sensing of weak magnetic fields from remote nuclear spins, advancing quantum information technology.

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Single-Molecule Imaging of Nuclear Transport
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Last Updated: May 19, 2026

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Area of Science:

  • Quantum Physics
  • Materials Science
  • Nanotechnology

Background:

  • Single nuclear spin detection is crucial for quantum information and basic science.
  • Existing methods like diamond defect sensing lack single nuclear spin detection capability and require strong coupling.

Purpose of the Study:

  • To present a novel technique for detecting and identifying single and remote nuclear spins.
  • To overcome limitations of existing sensing methods for nuclear spins.

Main Methods:

  • Utilizing a single electron spin of a nitrogen-vacancy (NV) center in diamond.
  • Employing dynamical decoupling control to amplify weak magnetic field noise from nuclear spins.
  • Detecting hyperfine coupling strengths as low as ~300 Hz.

Main Results:

  • Successfully detected and identified single and remote (13)C nuclear spins.
  • Achieved detection of magnetic field noise as weak as ~10 nT from nuclear spins ~3 nm away.
  • Confirmed the quantum nature of the spin coupling and measured spin-defect distance and nuclear field vector components.

Conclusions:

  • The developed technique represents a significant advancement in nuclear spin sensing.
  • This method paves the way for imaging, detecting, and controlling nuclear spins in single molecules.