CEA |   |   |   |   |   |   | webmail : intra - extra |  Accès VPN-SSL | Contact | Français

PhD subjects

2 sujets IRAMIS

Dernière mise à jour : 16-12-2018


««

• Chemistry

 

Realization of efficient and innovative functionalization of graphene and carbon nanotubes for energy and material science

SL-DRF-19-0236

Research field : Chemistry
Location :

Service Nanosciences et Innovation pour les Materiaux, la Biomédecine et l'Energie

Laboratoire Innovation, Chimie des Surfaces Et Nanosciences

Saclay

Contact :

Stéphane CAMPIDELLI

Starting date : 01-10-2019

Contact :

Stéphane CAMPIDELLI

CEA - DRF/IRAMIS/NIMBE/LICSEN

01-69-08-51-34

Thesis supervisor :

Stéphane CAMPIDELLI

CEA - DRF/IRAMIS/NIMBE/LICSEN

01-69-08-51-34

Personal web page : http://iramis.cea.fr/Pisp/stephane.campidelli/

Laboratory link : http://iramis.cea.fr/nimbe/licsen/

The aim of this project is the development of new functional carbon nanotubes and graphene derivatives. So far, functionalization of carbon-based nano-objects is based either on the covalent grafting or on the non-covalent adsorption of molecules on the nanotube/graphene surfaces. It is well established that the covalent grafting of molecules give rise to robust conjugates since the nano-objects and the addends are linked through covalent bonds; however, the transformation of carbon atoms hybridized sp2 into sp3 in the nanotube framework induces a sizeable loss of their electronic properties. On the contrary, the non-covalent functionalization permits to better preserve the electronic properties of the nanotubes. So, for a number of applications, the non-covalent functionalization should be preferred. However, this approach suffers from a major drawback which is the lack of stability of the resulting assemblies. Indeed, molecules adsorbed onto the nanotube sidewall can desorb, more or less easily, when for example the solvent changes or the nanotubes are filtered and redispersed.

Recently we developed a method combining most advantages of these two techniques without their major drawbacks. From the applicative point of view, this method can be used to create new carbon-based nanomaterials for photovoltaic, catalytic and electronic applications.

Synthesis and optical properties of graphene nanoparticles

SL-DRF-19-0235

Research field : Chemistry
Location :

Service Nanosciences et Innovation pour les Materiaux, la Biomédecine et l'Energie

Laboratoire Innovation, Chimie des Surfaces Et Nanosciences

Saclay

Contact :

Stéphane CAMPIDELLI

Starting date : 01-10-2019

Contact :

Stéphane CAMPIDELLI

CEA - DRF/IRAMIS/NIMBE/LICSEN

01-69-08-51-34

Thesis supervisor :

Stéphane CAMPIDELLI

CEA - DRF/IRAMIS/NIMBE/LICSEN

01-69-08-51-34

Personal web page : http://iramis.cea.fr/Pisp/stephane.campidelli/

Laboratory link : http://iramis.cea.fr/nimbe/licsen/

Graphene as a constituent of graphite was close to us for almost 500 years. However, it is only in 2005 that A. Geim and K. Novoselov (Nobel Prize in 2010) reported for the first time the obtaining of a nanostructure composed by a single layer of carbon atom. The exceptional electronic properties of graphene make it a very promising material for applications in electronic and renewable energies.



For many applications, one should be able to modify and control precisely the electronic properties of graphene. In this context, we propose to synthesize chemically graphene nanoparticles and study their absorption and photoluminescence properties. This project will be developed in collaboration with Physicists so the candidate will work in a multidisciplinary environment.

 

Retour en haut