In situ electron paramagnetic resonance spectroscopy using single nanodiamond sensors

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 spectrosco...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2023-07
Main Authors: Qin, Zhuoyang, Wang, Zhecheng, Kong, Fei, Su, Jia, Huang, Zhehua, Zhao, Pengju, Chen, Sanyou, Zhang, Qi, Shi, Fazhan, Du, Jiangfeng
Format: Article
Language:English
Subjects:
Amplitude modulation
Diamonds
Electron paramagnetic resonance
Molecular dynamics
Nanostructure
Vanadyl ions
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.2307.13349