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Magnetic properties characterization of functionalized iron oxide nanoparticles

Published online by Cambridge University Press:  31 January 2011

Yuan Yuan
Affiliation:, Rensselaer Polytechnic Institute, Mechanical, Aerospace and Nuclear Engineering, Troy, New York, United States
Diana-Andra Borca-Tasciuc
Affiliation:, Rensselaer Polytechnic Institute, Mechanical, Aerospace and Nuclear Engineering, Troy, New York, United States
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This paper uses complex magnetic susceptibility measurements to investigate the effects of different coatings on the susceptibility of iron oxide nanoparticles. The two coatings used in these measurements are aminosilane and carboxymethyl-dextran. Susceptibility measurements are carried out over a range of frequencies from 10 KHz to 1 MHz using a differential impedance method. The differential impedance measurement setup is validated by measuring the susceptibility of ferrofluids and comparing the results to values previously published in literature. The theoretical relaxation times based on Brownian and Neel mechanisms are used to predict the resonance frequency of imaginary part of complex susceptibility for iron oxide nanoparticles.

Research Article
Copyright © Materials Research Society 2010

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