Magnetic and Electron Spin Relaxation Properties of (GdxY1-x)(2)O-3 (0 <= x <= 1) Nanoparticles Synthesized by the Combustion Method. Increased Electron Spin Relaxation Times with Increasing Yttrium Content

Gustafsson, Håkan (author): Center for Medical Image Science and Visualization (CMIV), Linköping University/US, Linköping, och Dept of Medical and Health Science (IMH), Division of Radiology, Linköping University, Linköping

Ahrén, Maria (author): Dept of Physics, Chemistry and Biology (IFM), Linköping University, Linköping

Söderlind, Fredrik (author): Dept of Physics, Chemistry and Biology (IFM), Linköping University, Linköping

Gallego, José M Cordoba (author): Dept of Physics, Chemistry and Biology (IFM), Linköping University, Linköping

Käll, Per-Olov (author): Dept of Physics, Chemistry and Biology (IFM), Linköping University, Linköping

Uvdal, Kajsa (author): Dept of Physics, Chemistry and Biology (IFM), Linköping University, Linköping

Engström, Maria (author): Center for Medical Image Science and Visualization (CMIV), Linköping University/US, Linköping, och Dept of Medical and Health Science (IMH), Division of Radiology, Linköping University, Linköping

(creator_code:org_t)

2011-03-14
2011
English.
In: The Journal of Physical Chemistry C. - : American Chemical Society (ACS). - 1932-7447 .- 1932-7455. ; 115:13, s. 5469-5477

Related links:: https://urn.kb.se/re...; show more...; https://doi.org/10.1...; show less...

Abstract Subject headings

The performance of a magnetic resonance imaging contrast agent (CA) depends on several factors, including the relaxation times of the unpaired electrons in the CA. The electron spin relaxation time may be a key factor for the performance of new CAs, such as nanosized Gd2O3 particles. The aim of this work is, therefore, to study changes in the magnetic susceptibility and the electron spin relaxation time of paramagnetic Gd2O3 nanoparticles diluted with increasing amounts of diamagnetic Y2O3. Nanoparticles of (GdxY1-x)(2)O-3 (0 <= x <= 1) were prepared by the combustion method and thoroughly characterized (by X-ray diffraction, transmission electron microscopy, thermogravimetry coupled with mass spectroscopy, photoelectron spectroscopy, Fourier transform infrared spectroscopy, and magnetic susceptibility measurements). Changes in the electron spin relaxation time were estimated by observations of the signal line width in electron paramagnetic resonance spectroscopy, and it was found that the line width was dependent on the concentration of yttrium, indicating that diamagnetic Y2O3 may increase the electron spin relaxation time of Gd2O3 nanoparticles.

By the author/editor: Gustafsson, Håka ...; Ahrén, Maria; Söderlind, Fredr ...; Gallego, José M ...; Käll, Per-Olov; Nordblad, Per; show more...; Westlund, Per-Ol ...; Uvdal, Kajsa; Engström, Maria; show less...

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