Utilisateur non trouvé

 

I. By the way

Courses & Training Teachings & Responsibilities Courses & Training

  • 2019 – present : Research fellow at the Charles Gerhardt Institute of Montpellier (ICGM).
  • 2020 : Habilitation to Supervise Research, University of Montpellier.
  • 2006-2014 : Research fellow at the Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP) – Chimie ParisTech site.
  • 2004-2005 : Post-doctoral fellowship at Imperial College London (United Kingdom) in the Experimental Solid-State Physics group of Prof. K. Barnham (Marie Curie IEF). "Photo and Electro-luminescence of quantum well photovoltaic cells".
  • 2002-2003 : Post-doctoral fellowship at the University of Delft (Netherlands) in the Radiation Technology group of Dr. P. Dorenbos. "Luminescence of scintillator crystals for the detection of neutrons, X-rays and g-rays".
  • 1998-2002 : Thesis at the Ecole Nationale Supérieure de Chimie de Paris (Chimie ParisTech), Laboratoire de Chimie Appliquée de l'Etat Solide, under the supervision of Pr N. Baffier and the EADS Joint Research Centre, Suresnes. "Plastic devices with adaptive electro-optical properties in visible (electrochromism) and infrared (emissivity variability)".

Teachings & Responsibilities

Ii. Research activities
ZnGa2O4:Cr persistent luminescence nanoparticles (ZGO) for in vivo small animal imaging

We have uncovered the exceptional persistent luminescence properties of ZnGa2O4:Cr (ZGO) in the near infrared, based on a mechanism of localized charge trapping on defects of antisites located near Cr3+ ions. The ZGO nanoparticles made it possible to develop optical imaging with a very high signal-to-noise ratio because it is without autofluorescence.

Research themes Collaborations & Contracts Research themes

Persistent luminescence nanoparticles are developed from a host crystalline matrix (oxide, fluoride) doped by a luminescent ion (transition metal, lanthanide) and by a finely controlled point defect. During an excitation (X, UV, visible), the energy is stored in the form of electrons/holes trapped by point defects. Once the excitation stops, the ambient temperature allows the progressive detection of the charges, which feed back the luminescent center, thus producing a "persistent" luminescence that declines very slowly (minutes/hour). We have uncovered the exceptional persistent luminescence properties of ZnGa2O4:Cr (ZGC) in the near infrared, based on a localized trapping mechanism on defects of antisites located near Cr3+ ions. The ZGC nanoparticles made it possible to develop optical imaging with a very high signal-to-noise ratio because without autoflurescence. We are currently developing novel persistent luminescence nanoparticles emitting in green and UV-blue for applications in photodynamic therapy and bio-orthogonal photoclick

Collaborations & Contracts

  • Dr. M. Gary-Bobo, Dr. N. Bettache (IBMM, Montpellier)
  • Pr. J. Roessler, Dr. M. Bernasconi (Inselspital University Hospital Bern)
  • Dr. Ph. Smet (Lumilab, Ghent University)
  • Pr. K. Priolkar (Physics Group, Goa University, India)
  • Dr. A. Bos, Pr. P. Dorenbos (Radiation Technology Group, Interfaculty Reactor Institute, Delft University of Technology, Delft, The Netherlands)
  • Dr. C. Richard, Pr. D. Sherman (Unit of Chemical Pharmacology and Genetics (UPCG), Paris VII University, Paris)

 

Iii. Scientific production

Loading publis...