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Improved Transversal Relaxivity for Highly Crystalline Nanoparticles of Pure γ-Fe2 O3 Phase

Abstract : Pure and highly crystalline γ-Fe2 O3 nanocrystals (NCs) are obtained when hydrolysis and oxidation of a Fe(II) organometallic precursor are performed in successive steps. Their synthesis in pure alkylamine leads to NCs of about 6 nm. In aqueous solutions of poly(vinyl)pyrrolidone, such pristine NCs form aggregates of about 150 nm that exhibit a high transversal relaxivity (r2 =466 mM(-1)  s(-1) ) about four times higher than that of a commercial Feridex magnetic resonance imaging (MRI) contrast agent. Consequently, they provide a significant decrease in the NMR signal at very short echo time (8 ms), which is of paramount importance in clinical practice because of the reduced duration of MRI measurements
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01231170
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Submitted on : Thursday, November 19, 2015 - 3:47:37 PM
Last modification on : Saturday, July 11, 2020 - 3:16:50 AM

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Gérald Casterou, Vincent Colliere, Pierre Lecante, Yannick Coppel, Pierre-Antoine Eliat, et al.. Improved Transversal Relaxivity for Highly Crystalline Nanoparticles of Pure γ-Fe2 O3 Phase. Chemistry - A European Journal, Wiley-VCH Verlag, 2015, 21 (51), pp.18855-18861. ⟨10.1002/chem.201502905⟩. ⟨hal-01231170⟩

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