A tunable synthesis of iron nanoparticles (NPs) based on the decomposition of {Fe[N(SiMe3)2]2]2 in the presence of organic superstructures composed of palmitic acid and hexadecylamine is reported. Control of the size (from 1.5 to 27 nm) and shape (spheres, cubes, or stars) of the NPs has been achieved. An environment-dependent growth model is proposed on the basis of results obtained for the NP morphology under various conditions and a complete Mössbauer study of the colloid composition at different reacting stages. It involves (i) an anisotropic growth process inside organic superstructures, leading to monocrystalline cubic NPs, and (N) isotropic growth outside these superstructures, yielding polycrystalline spherical NPs.
Iron nanoparticle growth in organic superstructures / L.M. Lacroix, S. Lachaize, A. Falqui, M. Respaud, B. Chaudret. - In: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY. - ISSN 0002-7863. - 131:2(2009 Jan), pp. 549-557. [10.1021/ja805719c]
Iron nanoparticle growth in organic superstructures
A. Falqui;
2009
Abstract
A tunable synthesis of iron nanoparticles (NPs) based on the decomposition of {Fe[N(SiMe3)2]2]2 in the presence of organic superstructures composed of palmitic acid and hexadecylamine is reported. Control of the size (from 1.5 to 27 nm) and shape (spheres, cubes, or stars) of the NPs has been achieved. An environment-dependent growth model is proposed on the basis of results obtained for the NP morphology under various conditions and a complete Mössbauer study of the colloid composition at different reacting stages. It involves (i) an anisotropic growth process inside organic superstructures, leading to monocrystalline cubic NPs, and (N) isotropic growth outside these superstructures, yielding polycrystalline spherical NPs.File | Dimensione | Formato | |
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