AI Article Synopsis
- This study introduces a new method for Electron Paramagnetic Resonance (EPR) spectroscopy using Nitrogen-Vacancy centers in diamond instead of traditional bulky equipment.
- By monitoring the relaxation time (T1) of these centers, researchers successfully detected interactions with a specific compound while encoding EPR spectra through a localized magnetic field gradient.
- The new technique significantly speeds up data collection, completing full spectra in just 3 seconds compared to the 12 minutes per data point required for individual centers, and shows high sensitivity with minimal sample volume needed.
Article Abstract
We present an alternative to conventional Electron Paramagnetic Resonance (EPR) spectroscopy equipment. Avoiding the use of bulky magnets and magnetron equipment, we use the photoluminescence of an ensemble of Nitrogen-Vacancy centers at the surface of a diamond. Monitoring their relaxation time (or T1), we detected their cross-relaxation with a compound of interest. In addition, the EPR spectra are encoded through a localized magnetic field gradient. While recording previous data took 12 min per data point with individual NV centers, we were able to reconstruct a full spectrum at once in 3 s, over a range from 3 to 11 G. In terms of sensitivity, only 0.5 μL of a 1 μM hexaaquacopper(II) ion solution was necessary.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10152489 | PMC |
| http://dx.doi.org/10.1021/acssensors.2c02809 | DOI Listing |
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