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Magnetic Nanoparticles Decorated Single-Layer Graphene: Synthesis and Characterization by Nadzeya Kryvutsa -
Vendredi 21/03/2025 à 15h00 - Auditoire LAVO51 - Bâtiment Lavoisier - Place Louis Pasteur, 1 - 1348 Louvain-la-Neuve
Graphene has become one of the most intensively studied materials since its discovery and its isolation as a single sheet by Novoselov in 2004. Graphene, a one-atom-thick carbon sheet, is an interesting material due to its properties, such as being an excellent conductor of electricity and heat. It is one of the thinnest and stiffest material in the world. Thanks to these combined properties, graphene has applications in different areas like in batteries, transparent conductive films and flexible electronics. However, pristine graphene possesses a zero-band gap and for this reason cannot be used in nano-electronic applications. The gaplessness has led to a large body of research projects aimed at graphene functionalization and its band gap opening by doping. As pristine graphene is non-magnetic in itself, introduction of magnetism became essential to open the doors to its application in spintronic devices and biomedical applications. Magnetism can be induced by functionalization, doping and the introduction of atoms on the surface of graphene. In this thesis, a strategy to decorate single sheet graphene by magnetic nanoparticles using non-covalent functionalization was developed. This involved the synthesis of pyrene tagged Fe, Co or Ni complexes and their introduction on the graphene surface before thermal coalescence into nanoparticles. The obtained hybrid materials were characterized and compared with adsorption of preformed magnetite NPs. Finally, transport properties of devices made of single-layer graphene decorated with magnetite NPs were studied at low temperature.
Jury members :
Prof. Sophie HERMANS(UCLouvain) (Promoteur)
Prof. Benoit HACKENS (UCLouvain) (Promoteur)
Prof. Eric GAIGNEAUX (UCLouvain) (Président)
Prof. Jean-François GOHY (UCLouvain) (Secrétaire)
Dr. Fernando MASSA FERNANDES (UCLouvain)
Dr. Carla BITTENCOURT (UMons, Belgium)
Dr. Hanako OKUNO ( CEA, France)
Pay attention : the public defense of Nadzeya Kryvutsa will also take place in the form of a videoconference
