Ultra-fast method to synthesize mesoporous magnetite nanoclusters as highly sensitive magnetic resonance probe
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AbstractAn ultra-fast method to synthesize mesoporous magnetite (Fe3O4) nanoclusters is reported. These mesoporous magnetite can be used as a highly sensitive magnetic resonance imaging (MRI) probe. The nanoclusters were synthesized by reducing iron (III) acetylacetonate with hydrazine in ethylene glycol under microwave irradiation and only 5 min was needed in the synthesis. The diameter of the nanoclusters could be controlled effectively between 75 nm and 115 nm by increasing the amount of iron (III) acetylacetonate. Brunauer-Emmett-Teller (BET) results reveal a mesoporous structure and a large surface area of 72.3 m(2) g(-1). Cytotoxicity test performed in HepG2 cell line indicated that the as-prepared nanoclusters were non-cytotoxic. The nanoclusters exhibited an enhanced T-2 relaxivity value of 417.4 +/- 29.9 s(-1) mM(-1). In vitro and in vivo MRI confirmed the high sensitivity of the magnetite nanoclusters as MRI probe. The biodistribution of the nanoclusters in rat liver and spleen after intravenous injection was also investigated. (C) 2012 Elsevier Inc. All rights reserved.
All Author(s) ListJia JC, Yu JC, Zhu XM, Chan KM, Wang YXJ
Journal nameJournal of Colloid and Interface Science
Volume Number379
LanguagesEnglish-United Kingdom
KeywordsMagnetic resonance imaging; Magnetite nanoclusters; Mesoporous; Microwave irradiation
Web of Science Subject CategoriesChemistry; Chemistry, Physical; CHEMISTRY, PHYSICAL

Last updated on 2020-06-08 at 02:41