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Effects of Magnetic Nanoparticles on Magnetic Resonance and Spin Relaxation in Systems of Different Viscosity

Published online by Cambridge University Press:  31 January 2011

Natalia Noginova
Affiliation:, NSU, 700 Park, Norfolk, Virginia, 23504, United States
Aleksandr Andreyev
Affiliation:, Virginia Tech, Blacksburg, Virginia, United States
Julia Noginova
Affiliation:, PAHS, Virginia Beach, Virginia, United States
Joseph C Hall
Affiliation:, NSU, Norfolk, Virginia, United States
Vani Ramesh
Affiliation:, NSU, Norfolk, Virginia, United States
Vadim A Atsarkin
Affiliation:, IRE, Moscow, Russian Federation
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Nuclear Magnetic Resonance (NMR) technique is a convenient method to monitor magnetic nanoparticles in different biomedical applications and observe changes induced by the particles. To better understand the specifics of the magnetic resonance and spin relaxation in the systems with magnetic nanoparticles, the NMR spectra and magnetization dynamics of the host protons are studied in the model systems of different viscosity and some biological systems in the presence of magnetic nanoparticles. The results confirmed that nanoparticles affect the proton relaxation kinetics of liquid solutions, changing the relaxation time (T1) significantly, whereas in systems of high viscosity the relaxation times are unchanged. The kinetics in intermediate systems is multi-exponential. A complicated picture is observed in biological systems, demonstrating contributions of liquid-like and solid-like behavior.

Research Article
Copyright © Materials Research Society 2010

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