O. Züger, U. Dürig
Physical Review B
Micromechanical sensing of magnetic force was used to detect nuclear magnetic resonance with exceptional sensitivity and spatial resolution. With a 900 angstrom thick silicon nitride cantilever capable of detecting subfemtonewton forces, a single shot sensitivity of 1.6 × 1013 protons was achieved for an ammonium nitrate sample mounted on the cantilever. A nearby millimeter-size iron particle produced a 600 tesla per meter magnetic field gradient, resulting in a spatial resolution of 2.6 micrometers in one dimension. These results suggest that magnetic force sensing is a viable approach for enhancing the sensitivity and spatial resolution of nuclear magnetic resonance microimaging.
O. Züger, U. Dürig
Physical Review B
J.A. Sidles, J.L. Garbini, et al.
Reviews of Modern Physics
D. Rugar, C.S. Yannoni, et al.
Nature
K. Wago, D. Botkin, et al.
Applied Physics Letters