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Volume 61, Issue 5

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Magnetically modified bentonite as a possible contrast agent in MRI of gastrointestinal tract

H. Bartonkova / M. Mashlan / I. Medrik / D. Jancik / R. Zboril
Published Online: 2007-10-01 | DOI: https://doi.org/10.2478/s11696-007-0057-9

Abstract

A composite of iron oxide nanoparticles and mineral matrix has been studied by XRD, Mössbauer spectroscopy, and TEM. Magnetite and superparamagnetic magnetite have been identified by Mössbauer spectroscopy in the nanocomposite. A relationship between the hyperfine parameters and iron oxide particle size has been confirmed by TEM. The optimal concentration of “magnetite—bentonite” composite, when the MRI signal is fully reduced, was found for using this composite as a negative contrast agent.

Keywords: magnetite; bentonite; nanoparticles; MRI; Mössbauer spectroscopy

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About the article

Published Online: 2007-10-01

Published in Print: 2007-10-01


Citation Information: Chemical Papers, Volume 61, Issue 5, Pages 413–416, ISSN (Online) 1336-9075, DOI: https://doi.org/10.2478/s11696-007-0057-9.

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© 2007 Institute of Chemistry, Slovak Academy of Sciences.

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