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Proceedings Paper

The effect of viscosity on the phase of the nanoparticle magnetization induced by a harmonic applied field
Author(s): John B. Weaver; Matthew Harding; Adam M. Rauwerdink; Eric W. Hansen
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Paper Abstract

The temperature of magnetic nanoparticles can be estimated with excellent accuracy using the ratio of the harmonics of the magnetization induced by a harmonic magnetic field. The harmonics can be measured in vivo with high sensitivity. The method has been generalized to measure any physical property influencing the nanoparticle Brownian motion, including temperature, viscosity and bound state. We present theory and preliminary data suggesting that the phase of the harmonics can also be used to estimate the viscosity. The use of the phase should allow more sensitive measurements and alternative ways of separating dynamic from static effects.

Paper Details

Date Published: 9 March 2010
PDF: 8 pages
Proc. SPIE 7626, Medical Imaging 2010: Biomedical Applications in Molecular, Structural, and Functional Imaging, 762627 (9 March 2010); doi: 10.1117/12.845576
Show Author Affiliations
John B. Weaver, Dartmouth Colege (United States)
Dartmouth-Hitchcock Medical Ctr. (United States)
Matthew Harding, The Univ. of New Hampshire (United States)
Adam M. Rauwerdink, Dartmouth College (United States)
Eric W. Hansen, Dartmouth College (United States)


Published in SPIE Proceedings Vol. 7626:
Medical Imaging 2010: Biomedical Applications in Molecular, Structural, and Functional Imaging
Robert C. Molthen; John B. Weaver, Editor(s)

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