SHG Active Fe(IO3)3Particles: From Spherical Nanocrystals to Urchin-Like Microstructures through the Additive-Mediated Microemulsion Route
| Autor: | Moustafa El Kass, Christine Galez, Hatem Fessi, Abdelhamid Elaissari, Yannick Mugnier, Ronan Le Dantec, Rachid Ladj |
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| Přispěvatelé: | Laboratoire SYstèmes et Matériaux pour la MEcatronique (SYMME), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), Laboratoire d'automatique et de génie des procédés (LAGEP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Materials science
Nanoparticle [PHYS.MECA.GEME]Physics [physics]/Mechanics [physics]/Mechanical engineering [physics.class-ph] 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound Adsorption Pulmonary surfactant law PEG ratio Organic chemistry General Materials Science Microemulsion Crystallization Iodate General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Amorphous solid [SPI.MECA.GEME]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanical engineering [physics.class-ph] chemistry Chemical engineering 0210 nano-technology |
| Zdroj: | Crystal Growth & Design Crystal Growth & Design, American Chemical Society, 2012, 12, pp.5387,5395. ⟨10.1021/cg3009915⟩ |
| ISSN: | 1528-7505 1528-7483 |
| DOI: | 10.1021/cg3009915 |
| Popis: | International audience; ABSTRACT: Spherical nanocrystals of iron iodate (Fe(IO3)3) as well as different hierarchically organized hybrid superstructures are synthesized at 80 °C from AOT-based water-in-oil microemulsions. For a fixed reaction time of 2 h, initial addition of PEG molecules and changes in the water/surfactant molar ratio w allow modification of the interactions between surfactant and PEG molecules at the surface of amorphous precursor particles. At low water content (w = 5.8), adsorption of AOT molecules inhibits the formation of crystallized nanoparticles if the amount of added PEG is too low, whereas spherical nanocrystals are obtained otherwise. In contrast, at a high water content (w = 12.2), SEM and TEM imaging reveal that the aggregation-induced crystallization of amorphous precursors induces the formation of higher-order complex forms. Aggregates of elongated cone-shaped bundles of nanofilaments and, subsequently, quasi-spherical urchin-like microstructures as long as the PEG amount is raised are observed. Significantly, lattice parameter refinements originally demonstrate the key role of AOT in the self-assembly and a homogeneous nucleation, leading to the formation of primary bouquet-like structures, is suggested before further self-assembly results in urchinlike structures. In terms of potential applications, spherical nanocrystals are promising exogenous labels for multiphoton microscopy, whereas higher-order architectures give perspectives in the morphogenesis of new functional materials. |
| Databáze: | OpenAIRE |
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