@article{10902/24791,
year = {2017},
month = {7},
url = {http://hdl.handle.net/10902/24791},
abstract = {The assembly of magnetic cores into regular structures may notably influence the properties displayed by a magnetic colloid. Here, key synthesis parameters driving the self-assembly process capable of organizing colloidal magnetic cores into highly regular and reproducible multi-core nanoparticles are determined. In addition, a self-consistent picture that explains the collective magnetic properties exhibited by these complex assemblies is achieved through structural, colloidal, and magnetic means. For this purpose, different strategies to obtain flower-shaped iron oxide assemblies in the size range 25?100 nm are examined. The routes are based on the partial oxidation of Fe(OH)2, polyol-mediated synthesis or the reduction of iron acetylacetonate. The nanoparticles are functionalized either with dextran, citric acid, or alternatively embedded in polystyrene and their long-term stability is assessed. The core size is measured, calculated, and modeled using both structural and magnetic means, while the Debye model and multi-core extended model are used to study interparticle interactions. This is the first step toward standardized protocols of synthesis and characterization of flower-shaped nanoparticles.},
organization = {This work was partially supported by the European Commission Framework Program 7 (NanoMag project, NO 604448) and by the Spanish Ministry of Economy and Competitiveness (Mago project, N◦ MAT2014-52069-R).},
publisher = {Wiley-Blackwell},
publisher = {Particle and Particle Systems Characterization, 2017, 34 (7), 1700094},
title = {Colloidal flower-shaped iron oxide nanoparticles: Synthesis strategies and Coatings},
author = {Gavilán, Helena and Kowalski, Anja and Heinke, David and Sugunan, Abhilash and Sommertune, Jens and Varón, Miriam and Bogart, Lara K and Posth, Oliver and Zeng, Lunjie and González Alonso, David and Balceris, Christoph and Fock, Jeppe and Wetterskog, Erik and Frandsen, Cathrine and Gehrke, Nicole and Grüttner, Cordula and Fornara, Andrea and Ludwig, Frank and Veintemillas Verdaguer, Sabino and Johansson, Christer},
}