Experimental study on T<inf>2</inf> relaxation time of protons in water suspensions of iron-oxide nanoparticles: Waiting time dependence

N. Sun; D. X. Chen; H. C. Gu; X. L. Wang

doi:10.1016/j.jmmm.2009.04.073

Experimental study on T<inf>2</inf> relaxation time of protons in water suspensions of iron-oxide nanoparticles: Waiting time dependence

N. Sun, D. X. Chen, H. C. Gu, X. L. Wang

Department of Physics

Research output: Contribution to journal › Article › Research › peer-review

25 Citations (Scopus)

Abstract

The T2 relaxation time of protons in water suspensions of iron-oxide particle clusters is found to increase with the waiting time tw after the sample is inserted in the gap of the magnet with 1.41 T field, owing to field induced cluster aggregation. In order to compare the experimental results with existing theories, the measured T2 has to be extrapolated to tw = 0, for which a power-law T2 increment versus tw relation is proposed. The extrapolated T2 (0) is found to be inversely proportional to the volume fraction v of iron oxide. © 2009 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	2971-2975
Journal	Journal of Magnetism and Magnetic Materials
Volume	321
Issue number	18
DOIs	https://doi.org/10.1016/j.jmmm.2009.04.073
Publication status	Published - 1 Sep 2009

Keywords

Field induced cluster aggregation
MRI contrast agent
Superparamagnetic particle
T relaxation time 2
Waiting time dependence

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10.1016/j.jmmm.2009.04.073

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title = "Experimental study on T2 relaxation time of protons in water suspensions of iron-oxide nanoparticles: Waiting time dependence",

abstract = "The T2 relaxation time of protons in water suspensions of iron-oxide particle clusters is found to increase with the waiting time tw after the sample is inserted in the gap of the magnet with 1.41 T field, owing to field induced cluster aggregation. In order to compare the experimental results with existing theories, the measured T2 has to be extrapolated to tw = 0, for which a power-law T2 increment versus tw relation is proposed. The extrapolated T2 (0) is found to be inversely proportional to the volume fraction v of iron oxide. {\textcopyright} 2009 Elsevier B.V. All rights reserved.",

keywords = "Field induced cluster aggregation, MRI contrast agent, Superparamagnetic particle, T relaxation time 2, Waiting time dependence",

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AU - Sun, N.

AU - Chen, D. X.

AU - Gu, H. C.

AU - Wang, X. L.

PY - 2009/9/1

Y1 - 2009/9/1

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AB - The T2 relaxation time of protons in water suspensions of iron-oxide particle clusters is found to increase with the waiting time tw after the sample is inserted in the gap of the magnet with 1.41 T field, owing to field induced cluster aggregation. In order to compare the experimental results with existing theories, the measured T2 has to be extrapolated to tw = 0, for which a power-law T2 increment versus tw relation is proposed. The extrapolated T2 (0) is found to be inversely proportional to the volume fraction v of iron oxide. © 2009 Elsevier B.V. All rights reserved.

KW - Field induced cluster aggregation

KW - MRI contrast agent

KW - Superparamagnetic particle

KW - T relaxation time 2

KW - Waiting time dependence

U2 - 10.1016/j.jmmm.2009.04.073

DO - 10.1016/j.jmmm.2009.04.073

M3 - Article

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EP - 2975

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

IS - 18

ER -

Experimental study on T<inf>2</inf> relaxation time of protons in water suspensions of iron-oxide nanoparticles: Waiting time dependence

Abstract

Keywords

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