A5077370005- Phase-change materials and chalcogenides
- Photonic and Optical Devices
- Spectroscopy and Laser Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Chalcogenide Semiconductor Thin Films
- CO2 Sequestration and Geologic Interactions
- Geochemistry and Geologic Mapping
- Glass properties and applications
- Atmospheric and Environmental Gas Dynamics
- Spectroscopy and Chemometric Analyses
- Laser-induced spectroscopy and plasma
- Hydrocarbon exploration and reservoir analysis
- Semiconductor Lasers and Optical Devices
- Analytical chemistry methods development
- Luminescence Properties of Advanced Materials
- Solid-state spectroscopy and crystallography
- Analytical Chemistry and Sensors
- Mineral Processing and Grinding
- Advanced Chemical Sensor Technologies
- Cultural Heritage Materials Analysis
- Groundwater flow and contamination studies
- Water Quality Monitoring and Analysis
- Methane Hydrates and Related Phenomena
Université de Rennes
2001-2024
Bureau de Recherches Géologiques et Minières
2013-2024
Ifremer
2018
Institut National de Recherches Archéologiques Préventives
2015
Centre National de la Recherche Scientifique
2001-2004
Institut des Sciences Chimiques de Rennes
2003
Georgia Institute of Technology
2003
Consejo Superior de Investigaciones Científicas
2003
Fraunhofer Institute for Physical Measurement Techniques
2003
Tel Aviv University
2003
Abstract The development of the optical bio-chemical sensing technology is an extremely important scientific and technological issue for diagnosis monitoring diseases, control industrial processes, environmental detection air water pollutants. Owing to their distinctive features, chalcogenide amorphous thin films represent a keystone in manufacture middle infrared integrated devices sensitive biological or variations. Since characteristics, i.e. stoichiometric conformity, structure,...
Time-saving, low-cost analyses of soil contamination are required to ensure fast and efficient pollution removal remedial operations. In this work, laser-induced breakdown spectroscopy (LIBS) has been successfully applied in situ polluted soils, providing direct semi-quantitative information about the extent pollution. A field campaign carried out Brittany (France) on a site presenting high levels heavy metal concentrations. Results iron as major component well lead copper minor components...
A micro-sensor based on selenide glasses for evanescent wave detection in mid-infrared spectral range was designed and fabricated.Ge-Sb-Se thin films were successfully deposited by radio-frequency magnetron sputtering.In order to characterize them spectroscopic ellipsometry, atomic force microscopy contact angle measurements employed study near middle infrared refractive index, surface roughness the wettability, respectively.Selenide sputtered micropatterned means of reactive ion etching...
The detection of molecules dissolved in liquid medium can be envisaged by means an optical integrated sensor operating middle infrared range. intended is composed a cladding and guiding selenide sputtered layers transparent infrared. Hence, Ge-Sb-Se thin films were selected view tailored refractive index contrast, successfully deposited radio frequency magnetron sputtering characterized. To maximize the evanescent field at wavelength 7.7 µm, suitable waveguide allowing measuring transmitted...
With high refractive indices, appropriate solubility of rare earth, low phonon energy and transparency from the visible to 10 µm, a Ga-Ge-Sb-S system allows emission Nd 3+ ions in near-and mid-IR spectral ranges.The glass transition temperature, density, expansion coefficient, near indexes were measured on bulk samples.Their network structures analyzed by Raman scattering spectrometry, NMR 71 Ga extended X-ray absorption fine structure (EXAFS, K-edge Ga, Ge, Sb, S Nd).The spectra neodymium...
A prototype mid-infrared sensor system for the determination of volatile organic pollutants in groundwater was developed and tested under real-world conditions. The comprises a portable Fourier transform infrared spectrometer, coupled to head via transparent silver halide fiber-optic cables. 10 cm unclad middle section 6-m-long fiber is coated with ethylene propylene copolymer order enrich analytes within penetration depth evanescent field protruding from head. mixture tetrachloroethylene,...
Soil-gas concentrations and flux were measured during 20 separate measurement campaigns at the TOTAL Lacq-Rousse carbon capture storage (CCS) pilot site, southern France, where 51,000 tons of CO2 injected in a depleted natural gas field. Baseline data (September 2008 to December 2009) are compared monitoring from injection (March 2010 March 2013) post-injection (February 2014 2015) periods. soil-gas varied atmospheric more than 16% vol. with 1.4% as median value. Summer showed high soil that...