Nanoscale nuclear magnetic resonance with a 1.9-nm-deep nitrogen-vacancy sensor

الأصل · EN

We present nanoscale NMR measurements performed with nitrogen-vacancy (NV) centers located down to about 2 nm from the diamond surface. NV centers were created by shallow ion implantation followed by a slow, nanometer-by-nanometer removal of diamond material using oxidative etching in air. The close proximity of NV centers to the surface yielded large 1H NMR signals of up to 3.4 uT-rms, corresponding to 330 statistically polarized or 10 fully polarized proton spins in a (1.8 nm)³ detection volume.