Electron Spin Magnetic Resonance Force Microscopy of Nitroxide Spin Labels

ORAL

Abstract

Nitroxide spin labels are widely used in electron spin resonance studies of biological and polymeric systems. Magnetic resonance force microscopy (MRFM) is a magnetic resonance technique that couples the high spatial resolution of a scanning probe microscope with the species selectivity of magnetic resonance. We report on our investigations of 4-amino TEMPO, a nitroxide spin label, by force-gradient MRFM. Our microscope operates at high vacuum in liquid helium, using a custom fabricated ultra-soft silicon cantilever in the magnet-on-cantilever geometry. An 18 GHz gap coupled microstripline resonator supplies the transverse field.

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Authors

  • Eric W. Moore

    Cornell University, Department of Chemistry and Chemical Biology, Cornell University

  • SangGap Lee

    Cornell University, Department of Chemistry and Chemical Biology, Cornell University

  • Steven A. Hickman

    Cornell University, Dept of Chemistry, Cornell University, Department of Chemistry and Chemical Biology, Cornell University

  • Sarah J. Wright

    Department of Chemistry and Chemical Biology, Cornell University

  • John A. Marohn

    Cornell University, Department of Chemistry and Chemical Biology, Cornell University