FAURE, Chrystel; MEYRE, Marie-Edith; TRÉPOUT, Sylvain; LAMBERT, Olivier; LEBRAUD, Eric

doi:10.1021/jp901105c

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FAURE, Chrystel
Centre de recherches Paul Pascal [CRPP]
Université Sciences et Technologies - Bordeaux 1 [UB]

MEYRE, Marie-Edith
Centre de recherches Paul Pascal [CRPP]
Université Sciences et Technologies - Bordeaux 1 [UB]

TRÉPOUT, Sylvain
Chimie et Biologie des Membranes et des Nanoobjets [CBMN]

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Journal of Physical Chemistry B. 2009, vol. 113, n° 25, p. pp. 8552-8559

American Chemical Society

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We report the formation of magnetic onion-type multilamellar vesicles. Iron oxide nanoparticles (np's) were synthesized inside lipidic multilamellar vesicles by coprecipitation of vesicle-encapsulated Fe2+ and Fe3+ ions induced by HO- diffusion through vesicle lamellae. The iron ion encapsulation efficiency of onions was measured by potentiometry and UV-vis absorbance spectroscopy. Its high value (75 ( 5% for both Fe2+ and Fe3+) ensures an intravesicular synthesis, as confirmed by cryo-transmission electron microscopy (TEM) imaging. The as-grown nanoparticles are characterized by X-ray diffraction analysis and TEM, and magnetic onions are imaged by cryo-TEM. The np size, controlled by temperature and time, ranges from 3 to 6 nm and is shown to be a key parameter for onion stability.< Leer menos

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Liposomes

Nanoparticles

Synthesis of Iron Oxide

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Magnetic Multilamellar Liposomes Produced by In Situ Synthesis of Iron Oxide Nanoparticles: "Magnetonions"

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