Towards chemical structure resolution with nanoscale nuclear magnetic resonance spectroscopy

Abstract

Nuclear magnetic resonance (NMR) spectroscopy has approached the limit of single molecule sensitivity, however the spectral resolution is currently insufficient to obtain detailed information on chemical structure and molecular interactions. Here we demonstrate more than two orders of magnitude improvement in spectral resolution by performing correlation spectroscopy with shallow nitrogen-vacancy (NV) magnetic sensors in diamond. In principle, the resolution is sufficient to observe chemical shifts in $\sim$1 T magnetic fields, and is currently limited by molecular diffusion at the surface. We measure oil diffusion rates of $D=0.15-0.2$\,nm${}^2/\mu$s within (5 nm)${}^3$ volumes at the diamond surface.

References in corpus (4)

• High-sensitivity diamond magnetometer with nanoscale resolution
• Detection and control of individual nuclear spins using a weakly coupled electron spin
• Spectroscopy of Surface-Induced Noise Using Shallow Spins in Diamond
• High-frequency and high-field optically detected magnetic resonance of nitrogen-vacancy centers in diamond

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