Journal ArticleDOI
Magnetite Nanocrystals: Nonaqueous Synthesis, Characterization, and Solubility†
Nicola Pinna,Stephanie Grancharov,Pablo Beato,Pierre Bonville,Markus Antonietti,Markus Niederberger +5 more
TLDR
In this article, a simple one-pot reaction process was applied for the preparation of nanocrystalline magnetite, where iron(III) acetylacetonate was dissolved in benzyl alcohol and treated in an autoclave between 175 and 200 °C.Abstract:
A novel nonaqueous route has been applied for the preparation of nanocrystalline magnetite. In a simple one-pot reaction process, iron(III) acetylacetonate was dissolved in benzyl alcohol and treated in an autoclave between 175 and 200 °C. This approach leads to monocrystalline magnetite particles with sizes ranging from 12 to 25 nm, as evidenced by X-ray analysis, HRTEM, and Raman and Mossbauer spectroscopy. The isolated particles can be redispersed either in polar or nonpolar solvents by coating them just after synthesis with undecanoic acid or dopamine. Simple sedimentation after redispersion in hexane can be used to lower the polydispersity of the sample.read more
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Journal ArticleDOI
Synthesis, properties, and applications of magnetic iron oxide nanoparticles
Amyn S. Teja,Pei Yoong Koh +1 more
TL;DR: In this article, the properties, applications, and syntheses of three magnetic iron oxides (hematite, magnetite, and maghemite) are discussed and methods of preparation that allow control over the size, morphology, surface treatment and magnetic properties of their nanoparticles.
Journal ArticleDOI
Functionalizing nanoparticles with biological molecules: developing chemistries that facilitate nanotechnology.
Kim E. Sapsford,W. Russ Algar,Lorenzo Berti,Kelly Boeneman Gemmill,Brendan J. Casey,Eunkeu Oh,Michael H. Stewart,Igor L. Medintz +7 more
TL;DR: Chemistries that Facilitate Nanotechnology Kim E. Sapsford,† W. Russ Algar, Lorenzo Berti, Kelly Boeneman Gemmill,‡ Brendan J. Casey,† Eunkeu Oh, Michael H. Stewart, and Igor L. Medintz .
Journal ArticleDOI
Hydrothermal synthesis of monodisperse magnetite nanoparticles
T. J. Daou,Geneviève Pourroy,Sylvie Begin-Colin,Jean-Marc Greneche,Corinne Ulhaq-Bouillet,P. Légaré,P. Bernhardt,Cédric Leuvrey,Guillaume Rogez +8 more
TL;DR: In this article, magnetite particles with an average size of 39 nm and good monodispersity have been synthesized by coprecipitation at 70 °C from ferrous Fe2+ and ferric Fe3+ ions by a (N(CH3)4OH) solution, followed by hydrothermal treatment at 250 °C.
Journal ArticleDOI
Organic reaction pathways in the nonaqueous synthesis of metal oxide nanoparticles.
TL;DR: General mechanistic principles for aqueous and nonaqueous sol-gel processes are presented, followed by the discussion of reaction pathways relevant for nanoparticle formation in organic solvents.
Journal ArticleDOI
Surfactant-free nonaqueous synthesis of metal oxide nanostructures.
Nicola Pinna,Markus Niederberger +1 more
TL;DR: Surfactant-free processes, which have become a valuable alternative to surfactant-assisted as well as to traditional aqueous sol-gel chemistry routes, are discussed.