Host-guest hybrid materials, composites and nanostructured architectures for photonic and biophotonic applications
Prof. Dr. Andrea S. S. de Camargo, São Carlos Institute of Physics, University of São Paulo, Brazil.
Where : Amphi Chaudron, Chimie ParisTech – PSL
The research focus of the Laboratory of Spectroscopy of Functional Materials (LEMAF), at IFSC/USP in Brazil, is on the development and functional characterization of optical and luminescent materials. In addition to the design and synthesis of the materials, special emphasis is given on structural-property correlations by combining optical and magnetic resonance spectroscopy techniques. The lab is part of CeRTEV – Center for Research, Technology and Education in Vitreous Materials, funded by FAPESP – the São Paulo state research foundation. Besides the longer-term contributions to the field of rare earth ion doped optical glasses and glass ceramics for near-infrared lasing, up- and energy downconversion and scintillation, a second research thrust at LEMAF is on luminescent host-guest hybrid materials and core-shell nanoparticles. Ongoing projects include the development of dense and mesoporous host silicates loaded with guest dyes and organometallic complexes, upconversion nanoparticles, quantum dots and plasmonic (Au) nanostructures. The targeted applications range from solid state lighting to chemical and bio-sensing, bioimaging and photodynamic therapy. In these directions, the host-guest approach offers synergistic advantages as: i) prevention of molecular aggregation; ii) protection of emissive guests from quenching agents; iii) prevention of cytotoxic leakage; iv) increased biocompatibility and solubility; vi) versatile application forms (films, gels, powders, fibers and bulk). In this talk, an overview of our contributions to the fascinating field of luminescent materials and applications will be presented.
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