Journal
NATURE
Volume 576, Issue 7787, Pages 411-+Publisher
NATURE RESEARCH
DOI: 10.1038/s41586-019-1834-7
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Funding
- Netherlands Organisation for Scientific Research (NWO/OCW) through a Vidi grant, as part of the Frontiers of Nanoscience (NanoFront) programme
- Netherlands Organisation for Scientific Research (NWO/OCW) through a Vidi grant as part of the Quantum Software Consortium programme [024.003.037/3368]
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Nuclear magnetic resonance (NMR) is a powerful method for determining the structure of molecules and proteins(1). Whereas conventional NMR requires averaging over large ensembles, recent progress with single-spin quantum sensors(2-9) has created the prospect of magnetic imaging of individual molecules(10-13). As an initial step towards this goal, isolated nuclear spins and spin pairs have been mapped(14-21). However, large clusters of interacting spins-such as those found in molecules-result in highly complex spectra. Imaging these complex systems is challenging because it requires high spectral resolution and efficient spatial reconstruction with sub-angstrom precision. Here we realize such atomic-scale imaging using a single nitrogen vacancy centre as a quantum sensor, and demonstrate it on a model system of 27 coupled C-13 nuclear spins in diamond. We present a multidimensional spectroscopy method that isolates individual nuclear-nuclear spin interactions with high spectral resolution (less than 80 millihertz) and high accuracy (2 millihertz). We show that these interactions encode the composition and inter-connectivity of the cluster, and develop methods to extract the three-dimensional structure of the cluster with sub-angstrom resolution. Our results demonstrate a key capability towards magnetic imaging of individual molecules and other complex spin systems(9-13).
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