Publication detail

Clusters of magnetic nanoparticles as contrast agents for MRI: The effect of aggregation on T2 relaxivity

Year: 2015

Type of publication: ostatní - článek ve sborníku

Name of source: INTERMAG 2015 - IEEE International Magnetics Conference: Proceedings

Publisher name: IEEE (Institute of Electrical and Electronics Engineers)

Place: New York

Page from-to: "BI-07-1"-"BI-07-1"

Titles:

Language	Name	Abstract	Keywords
eng	Clusters of magnetic nanoparticles as contrast agents for MRI: The effect of aggregation on T2 relaxivity	The effect of aggregation of magnetic nanoparticles on the transverse relaxivity (r2) is analyzed with respect to the size of clusters. The nanoparticles employed are based on La0.75Sr0.25MnO3 ferromagnetic phase with the mean size of crystallites dXRD = 26 encapsulated by silica shell. The silica coating provides colloidally stable particles whose magnetic cores are mostly composed of compact clusters of manganite crystallites. The product has been subjected to repeated differential centrifugation and several size fractions are isolated. The highest r2 values are clearly observed for midsized clusters and the temperature dependence of r2 resembles the evolution of magnetization with temperature. Supplemental samples with different thicknesses of the silica shell are also synthetized and thoroughly analyzed.	Contrast Agents;Magnetic Nanoparticles;Magnetic Resonance Imaging;Manganites;Transverse Relaxivity

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