Force Detection of Nuclear Magnetic Resonance

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 × 10$^{13}$ protons was achie...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1994-06, Vol.264 (5165), p.1560-1563
Main Authors: Rugar, D., Züger, O., Hoen, S., Yannoni, C. S., H.-M. Vieth, Kendrick, R. D.
Format: Article
Language:English
Subjects:
Atomic force microscopy
Cantilevers
Carrier frequencies
Climate
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
DETECTION
Exact sciences and technology
Imaging
Infrared, submillimeter wave, microwave and radiowave instruments, equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Laboratory Equipment
MAGNETIC FIELDS
MAGNETIC RESONANCE
Magnetic resonance imaging
Magnetism
Magnets
NMR
NUCLEAR MAGNETIC RESONANCE
Personality
Physics
Protons
Reaction Time
RESONANCE 665100 > Nuclear Techniques in Condensed Matter Physics > (1992-)
Signal noise
Spatial resolution
Submillimeter wave, microwave and radiowave spectrometers
magnetic resonance spectrometers, auxiliary equipments and techniques
Vibration
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Summary: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 × 10$^{13}$ 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.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.264.5165.1560