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Closed Access item Development of Magnetic Nanostructured Silica-Based Materials as Potential Vectors for Drug-Delivery Applications

Authors:Arruebo, Manuel
Galán, Marta
Navascués, Nuria
Téllez, Carlos
Marquina, Clara
Ibarra, M. Ricardo
Santamaría, J.
Issue Date:2006
Publisher:American Chemical Society
Citation:Chemistry of Materials 18(7): 1911–1919 (2006)
Abstract:Metallic iron nanoparticles were synthesized within micron-sized mesoporous molecular sieves (with 2.9-nm pores) and hollow silica microcapsules (pores of 2.7 and 15 nm) using several cycles of wet impregnation under vacuum, followed by drying, oxidation, and reduction steps. For iron-loaded MCM-48, SQUID measurements revealed ferromagnetic behavior at room temperature with a magnetic moment as high as 3.40 emu/g (measured at 2 T) after four deposition cycles. Iron-loaded hollow silica microcapsules (250-nm wall thickness) showed a magnetic moment of 2.40 emu/g (at 2 T) after three deposition cycles and a coercivity as low as 12.9 Oe.
Description:9 pages, 11 figures, 2 tables.
Publisher version (URL):http://dx.doi.org/10.1021/cm051646z
URI:http://hdl.handle.net/10261/19306
ISSN:1520-5126
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Appears in Collections:(ICMA) Artículos

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