Luminescent nanoparticles and micropowders for biophotonics and solid state lighting
Abstract During the last decade, the MatONLP team (Material, NonLinear Optics and Plasmonics) of Néel Institute has developed a great experience on the preparation of luminescent materials such as molecular nanocrystals, amorphous inorganic powders and hybrid organic-inorganic nanocomposites: bulk, homogeneous or nanocomposite thin films but also micro- and mesoporous silicate nanoparticles (NPs) or core-shell NPs. Various original wet chemical routes have been developed: confined growth of organic nanocrystals in sol-gel matrices, polymeric precursor methods, metal organic decompositions and co-precipitation processes. In this seminar an overview will be given on our different skills on coordination and solid-state chemistry, structural and physical chemistry characterizations on these nanostructured materials. Concerning the materials syntheses, several examples will be presented, as the syntheses of glassy aluminoborate powders for the development of phosphors for lighting devices or the accurate control of the confined nucleation of molecular nanocrystals in the pores of silicate sol-gel matrices leading to the preparation of hybrid nanocomposites thin films or NPs. On the other hand, this chimie douce chemistry can be also coupled with spin-coating, dip-coating, hydrothermal, microwaves and spray-pyrolysis technics. Finally, concerning the structural characterizations several examples will be included in this seminar such as electron microscopies and particularly electron diffraction, X-ray diffraction techniques as the PDF (partial distribution function) method and micro- or nano-photonics spectroscopies.
1983 PhD in "Materials Science" Université Montpellier II
1988 Thèse d'Etat, Université Montpellier II "Elaboration and characterizations of semiconducting chalcogenides crystals and glasses"
2001 Director of research CNRS
1988 Post-doctoral position at LURE (Synchrotron) Université d'Orsay Paris-Sud
2000 Head of the research group "materials for optics" Lab. Crystallography CNRS Grenoble
2003 Deputy Director Lab. Crystallography CNRS Grenoble
2007 Head of the research group "Materials ONL and plasmonics", Néel Institute Grenoble
2011 Director "Material science departement" MCMF and Deputy Director of Néel Institute
Elaboration and characterization of hybrid organic-inorganic crystals for quadratic non-linear optics (NLO).
Elaborations and characterizations of organic nanocrystals grown in gel glasses ( confined nucleation and growth bulk, thin films and nanoparticles).
Preparation and characterizations of bulk glasses for optics (chalcogenides, oxydes, borates); amorphous sol-gel thin films and fine powders of borates and oxides for optical amplifiers in integrated optics, optical ceramics and solid lighting (LEDs).