Solution nuclear magnetic resonance spectroscopy on a nanostructured diamond chip
| Autor: | Kehayias, P., Jarmola, A., Mosavian, N., Fescenko, I., Benito, F. M., Laraoui, A., Smits, J., Bougas, L., Budker, D., Neumann, A., Brueck, S. R. J., Acosta, V. M. |
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| Rok vydání: | 2017 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/s41467-017-00266-4 |
| Popis: | We demonstrate nuclear magnetic resonance (NMR) spectroscopy of picoliter-volume solutions with a nanostructured diamond chip. Using optical interferometric lithography, diamond surfaces were nanostructured with dense, high-aspect-ratio nanogratings, enhancing the surface area by more than a factor of 15 over mm^2 regions of the chip. The nanograting sidewalls were doped with nitrogen-vacancy (NV) centers so that more than 10 million NV centers in a (25 micrometer)^2 laser spot are located close enough to the diamond surface (5 nm) to detect the NMR spectrum of 1 pL of fluid lying within adjacent nanograting grooves. The platform was used to perform 1H and 19F NMR spectroscopy at room temperature in magnetic fields below 50 mT. Using a solution of CsF in glycerol, we demonstrate that 4 +/- 2 x 10^12 19F spins in a 1 pL volume, can be detected with a signal-to-noise ratio of 3 in 1 s integration. This represents nearly two orders of magnitude improvement in concentration sensitivity over previous NV and picoliter NMR studies. Comment: 7 pages, 6 figures (main text) + 11 pages, 7 figures, 5 tables (Supplemental) |
| Databáze: | arXiv |
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