In situ electron paramagnetic resonance spectroscopy using single nanodiamond sensors
arXiv:2307.13349 · doi:10.1038/s41467-023-41903-5
Abstract
An ultimate goal of electron paramagnetic resonance (EPR) spectroscopy is to analyze molecular dynamics in place where it occurs, such as in a living cell. The nanodiamond (ND) hosting nitrogen-vacancy (NV) centers will be a promising EPR sensor to achieve this goal. However, ND-based EPR spectroscopy remains elusive, due to the challenge of controlling NV centers without well-defined orientations inside a flexible ND. Here, we show a generalized zero-field EPR technique with spectra robust to the sensor's orientation. The key is applying an amplitude modulation on the control field, which generates a series of equidistant Floquet states with energy splitting being the orientation-independent modulation frequency. We acquire the zero-field EPR spectrum of vanadyl ions in aqueous glycerol solution with embedded single NDs, paving the way towards \emph{in vivo} EPR.
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Cited by in corpus (5)
- Single-molecule Scale Magnetic Resonance Spectroscopy using Nitrogen-Vacancy Centers in Diamond
- Quadrupolar resonance spectroscopy of individual nuclei using a room-temperature quantum sensor
- Parallel accelerated electron paramagnetic resonance spectroscopy using diamond sensors
- Subcellular Metabolic Tracking Using Fluorescent Nanodiamonds Relaxometry
- Suppression of spin bath and low-frequency noise for sub-MHz AC magnetometry based on double-dressed spin qubit in diamond