Journal
PHYSICAL REVIEW APPLIED
Volume 4, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevApplied.4.024004
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Funding
- DARPA/AFOSR QuASAR
- EU (CIG)
- EU (EQUAM)
- EU (ERC Synergy Grant BioQ)
- EU (DIAMANT)
- DFG [SFB TR 21, FOR 1493, FOR 1482, SPP1601]
- 973 Program [k2013CB921800]
- NNSFC [11227901]
- CAS [XDB01030400]
- Alexander von Humboldt Foundation
- DAAD P. R. I. M. E. fellowship
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Nuclear magnetic resonance 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 2 orders of magnitude improvement in spectral resolution by performing correlation spectroscopy with shallow nitrogen-vacancy magnetic sensors in diamond. In principle, the resolution is sufficient to observe chemical shifts in approximately 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.
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