Thesis presented December 15, 2014

Abstract:
The use of colloidal semiconductor nanoparticles, called quantum dots, is recent in redox photocatalysis. Those nanostructures exhibit strong and size depending visible absorption properties. The ligand shell on the nanoparticle surface can be furthermore managed to realize green applications.
Thus the study of redox photocatalysis with core CdSe nanoparticles and core-shell CdSe/ZnS was carried out with visible light in aqueous solvent. Firstly, we synthetized hydrophilic quantum-dots stabilized by amino acids ligands. Secondly, we perform three different studies of photocatalytic systems with the following substrates : modified amino acids, vanillin and 8oxodG. The nanoparticle's photochemical activity was first demonstrated and evaluated by the detection of photochemical products. The photoinduced charge transfer mechanism was elucidated during irradiation by spectroscopic techniques.

Keywords:
Water-soluble, Amino acids, Redox Photocatalysis, Quantum Dots

On-line thesis.