Three-dimensional magnetic resonance tomography with sub-10 nanometer resolution

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Abstract

We demonstrate three-dimensional magnetic resonance tomography with a resolution down to 5.9 ± 0.1 nm. Our measurements use lithographically fabricated microwires as a source of three-dimensional magnetic field gradients, which we use to image NV centers in a densely doped diamond by Fourier-accelerated magnetic resonance tomography. We also demonstrate a compressed sensing scheme, which allows for direct visual interpretation without numerical optimization and implements an effective zoom into a spatially localized volume of interest, such as a localized cluster of NV centers. It is based on aliasing induced by equidistant undersampling of k-space. The resolution achieved in our work is comparable to the best existing schemes of super-resolution microscopy and approaches the positioning accuracy of site-directed spin labeling, paving the way to three-dimensional structure analysis by magnetic-gradient based tomography.

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T. Amawi, M., Trelin, A., Huang, Y., Weinbrenner, P., Poggiali, F., Leibold, J., … Reinhard, F. (2024). Three-dimensional magnetic resonance tomography with sub-10 nanometer resolution. Npj Quantum Information, 10(1). https://doi.org/10.1038/s41534-024-00809-w

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