NMR tagged posts

A nitrogen-vacancy (dark blue) quantum probe in diamond (light grey) performing nanoscale nuclear magnetic resonance (NMR) on molecular hydrogen sitting on the diamond’s surface. A green laser controls the quantum state of the probe, which is tuned to the resonant frequency of target nuclear spins. The probe responds to the nuclear spins of the hydrogen atoms and provides a direct measurement via the red light emitted. Credit: David A. Broadway/cqc2t.org

Limitations of conventional NMR spectroscopy overcome. Researchers at the University of Melbourne have demonstrated a way to detect nuclear spins in molecules non-invasively, providing a new tool for biotechnology and materials science...

The highly sensitive magnetic field sensor. (Photograph: ETH Zurich / Peter Rüegg)

Researchers have succeeded in measuring tiny changes in strong magnetic fields with unprecedented precision. In their experiments, the scientists magnetised a water droplet inside an MRI scanner, a device that is used for medical imaging. They were able to detect even the tiniest variations of the magnetic field strength within the droplet. These changes were up to a trillion times smaller than the 7 tesla field strength of the MRI scanner used in the experiment.

“Until now, it was possible only to measure such small variations in weak magnetic fields,” says Klaas Prüssmann, Professor of Bioimaging at ETH Zurich and the University of Zurich...