Confined nano-NMR spectroscopy using NV centers

TL;DR

This paper demonstrates that confining liquids in nano-scale volumes enhances NV center-based NMR spectroscopy by mitigating diffusion effects, thereby improving spectral resolution without requiring high sample polarization.

Contribution

It introduces a confinement strategy that counteracts diffusion broadening, significantly advancing nano-NMR spectroscopy capabilities with NV centers.

Findings

Confinement reduces diffusion-induced spectral broadening.

Enhanced spectral resolution in nano-NMR spectroscopy.

Potential for improved chemical and medical analysis.

Abstract

Nano-NMR spectroscopy with nitrogen-vacancy centers holds the potential to provide high resolution spectra of minute samples. This is likely to have important implications for chemistry, medicine and pharmaceutical engineering. One of the main hurdles facing the technology is that diffusion of unpolarized liquid samples broadens the spectral lines thus limiting resolution. Experiments in the field are therefore impeded by the efforts involved in achieving high polarization of the sample which is a challenging endeavor. Here we examine a scenario where the liquid is confined to a small volume. We show that the confinement 'counteracts' the effect of diffusion, thus overcoming a major obstacle to the resolving abilities of the NV-NMR spectrometer.