Abstract
We demonstrate nuclear double resonance for nanometer-scale volumes of spins where random fluctuations rather than Boltzmann polarization dominate. When the Hartmann-Hahn condition is met in a cross-polarization experiment, flip-flops occur between two species of spins and their fluctuations become coupled. We use magnetic resonance force microscopy to measure this effect between and spins in -enriched stearic acid. The development of a cross-polarization technique for statistical ensembles adds an important tool for generating chemical contrast in nanometer-scale magnetic resonance.
- Received 12 December 2008
DOI:https://doi.org/10.1103/PhysRevLett.102.087604
©2009 American Physical Society
Synopsis
Separating oil from water with magnetic resonance force microscopy
Published 16 March 2009
An advance in magnetic resonance force microscopy enhances its chemical sensitivity and opens up the possibility of identifying different organic substances at the nanoscale.
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