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Nanomechanical detection of nuclear magnetic resonance using a silicon nanowire oscillator

John M. Nichol, Eric R. Hemesath, Lincoln J. Lauhon, and Raffi Budakian
Phys. Rev. B 85, 054414 – Published 13 February 2012
Physics logo See Viewpoint: Silicon Nanowires Feel the Force of Magnetic Resonance

Abstract

The authors report the use of a radio frequency (rf) silicon nanowire mechanical oscillator as a low-temperature nuclear magnetic resonance force sensor to detect the statistical polarization of 1H spins in polystyrene. To couple the 1H spins to the nanowire oscillator, a magnetic resonance force detection protocol was developed that utilizes a nanoscale current–carrying wire to produce large time-dependent magnetic field gradients as well as the rf magnetic field. Under operating conditions, the nanowire experienced negligible surface-induced dissipation and exhibited an ultralow force noise near the thermal limit of the oscillator.

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  • Received 1 November 2011

DOI:https://doi.org/10.1103/PhysRevB.85.054414

©2012 American Physical Society

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Silicon Nanowires Feel the Force of Magnetic Resonance

Published 13 February 2012

Silicon nanowire sensors offer a route to improving the sensitivity and spatial resolution of magnetic resonance force microscopy.

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Authors & Affiliations

John M. Nichol1, Eric R. Hemesath2, Lincoln J. Lauhon2, and Raffi Budakian1,*

  • 1Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
  • 2Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, USA

  • *budakian@illinois.edu

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Issue

Vol. 85, Iss. 5 — 1 February 2012

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