Title: Synthesis and characterisation of magnetic-luminescent composite colloidal nanostructures

Authors: V. Roullier, V. Marchi-Artzner, O. Cador, F. Dorson, T. Aubert, S. Cordier, Y. Molard, F. Grasset, S. Mornet, H. Haneda

Addresses: Universite de Rennes 1, UMR ‹‹Science Chimiques de Rennes›› UR1-CNRS 6226, Campus de Beaulieu, CS74205, F-35042 Rennes Cedex, France. ' Universite de Rennes 1, UMR ‹‹Science Chimiques de Rennes›› UR1-CNRS 6226, Campus de Beaulieu, CS74205, F-35042 Rennes Cedex, France. ' Universite de Rennes 1, UMR ‹‹Science Chimiques de Rennes›› UR1-CNRS 6226, Campus de Beaulieu, CS74205, F-35042 Rennes Cedex, France. ' Universite de Rennes 1, UMR ‹‹Science Chimiques de Rennes›› UR1-CNRS 6226, Campus de Beaulieu, CS74205, F-35042 Rennes Cedex, France. ' Universite de Rennes 1, UMR ‹‹Science Chimiques de Rennes›› UR1-CNRS 6226, Campus de Beaulieu, CS74205, F-35042 Rennes Cedex, France. ' Universite de Rennes 1, UMR ‹‹Science Chimiques de Rennes›› UR1-CNRS 6226, Campus de Beaulieu, CS74205, F-35042 Rennes Cedex, France. ' Universite de Rennes 1, UMR ‹‹Science Chimiques de Rennes›› UR1-CNRS 6226, Campus de Beaulieu, CS74205, F-35042 Rennes Cedex, France. ' Universite de Rennes 1, UMR ‹‹Science Chimiques de Rennes›› UR1-CNRS 6226, Campus de Beaulieu, CS74205, F-35042 Rennes Cedex, France. ' Institut de Chimie de la Matiere Condensee de Bordeaux, CNRS/Universite Bordeaux-1, 87, avenue du Docteur Albert Schweitzer, F-33 608 PESSAC Cedex, France. ' National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan

Abstract: In this communication, we report a review of our works on luminescent and magnetic bifunctional structures in the nanoscale range. The synthesis and characterisation of various colloidal nanostructures such as Y₃Fe_5-xAl_xO₁₂-TRITC, γ-Fe₂O₃–Cs₂Mo₆Br₁₄@SiO₂ and γ-Fe₂O₃-QDs will be presented. At the outset, the first synthesis of aluminium substituted garnet Y₃Fe_5-xAl_xO₁₂ by the citrate gel process and its surface modification by TRITC through grafting of 3-aminopropyltrimethoxysilane (g-APS) for hyperthermia application will be reported. Secondly, the synthesis of nanoparticles under restricted environments offered by water-in-oil microemulsions provides excellent control over particle size and shape and interparticle spacing. These environments have been used in the synthesis of silica nanoparticles (50 nm) with a magnetic nanocrystalline core surrounded by optically active molybdenum atoms clusters. Finally, we will resume the preparation of composite magnetic-QD bioconjugable micelles by simultaneous encapsulation of hydrophobic CdSe/ZnS QDs (2-4 nm) and magnetic γ-Fe₂O₃ nanoparticles (3-4 nm) into water soluble micelles of synthetic functional PEG amphiphiles bearing a bioactivable terminal group.

Keywords: silica; ferrites; clusters; quantum dots; magnetic-luminescent composites; colloidal nanostructures; multifunctional nanoparticles; biotechnology; nanotechnology; bifunctional structures.

DOI: 10.1504/IJNT.2010.029547

International Journal of Nanotechnology, 2010 Vol.7 No.1, pp.46 - 57

Published online: 30 Nov 2009 *

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