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PhD subjects

5 sujets IRAMIS

Dernière mise à jour : 17-09-2019


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• Chemistry

 

Exfoliation of porous 2D mineral phases for e-waste material recycling

SL-DRF-19-0706

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 :

Jean-Christophe GABRIEL

Starting date : 01-10-2019

Contact :

Jean-Christophe GABRIEL
CEA - DRF/IRAMIS/NIMBE/LICSEN

0438780257

Thesis supervisor :

Jean-Christophe GABRIEL
CEA - DRF/IRAMIS/NIMBE/LICSEN

0438780257

Personal web page : http://www.linkedin.com/in/jcpgabriel

Laboratory link : http://inac.cea.fr/Phocea/Pisp/index.php?nom=jean-christophe.gabriel

More : http://iramis.cea.fr/nimbe/licsen/

This PhD project aims to synthesize, characterize, exfoliate and develop new nanostructured architectures based on new two-dimensional inorganic phases. These nanostructures will be designed for filtration devices for the separation of ions from the recycling of electronic waste, This project will be carried out the first year in the joint laboratory SCARCE located in Singapore at NTU University, then at CEA, at IRAMIS for the rest of the thesis. The doctoral student will interact with chemists, physicists and electrochemists in a truly multidisciplinary environment, on a fundamental research subject directly connected to application needs. Thus, during his thesis the student will be exposed to a multidisciplinary environment and brought to realize experiments in various fields such as inorganic chemistry, physical chemistry, micro / nano-manufacturing in clean rooms and nano-characterization and electrochemical methods. In this context, this project should potentially lead to significant societal benefits. For the realization of the latter, it will have access to a very wide and varied range of equipment ranging from the optical microscope to the latest generation synchrotron (ESRF), through the field effect or electronic microscopes and galvanostats. This thesis is therefore an excellent opportunity for professional growth both from the point of view of your knowledge and your know-how.
Radiosensitive polymeric nano-objects

SL-DRF-19-0982

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 :

Geraldine CARROT

Jean-Philippe RENAULT

Starting date : 01-10-2017

Contact :

Geraldine CARROT
CEA - DRF/IRAMIS

01 69 08 41 47

Thesis supervisor :

Jean-Philippe RENAULT
CEA - DRF/IRAMIS/NIMBE/LIONS

01 69 08 15 50

This project involves the development of new delivery systems for drugs based on the degradation of polymers by irradiation. This new stimulus has never been explored for such applications. This permits to consider a coupled chemo- and radiotherapy beyond the simple trigger release. The objective is to perform the synthesis of a library of original amphiphilic copolymers, i.e. with a water-soluble/biocompatible part, together with a hydrophobic/radiosensitive part. The self-assembly into micelles or vesicles will lead to objects with a radiosensitive core where the drug will be located. The first advantage of these new systems is to control more finely the targeting of drug to the tumor cells and to avoid the side effects associated with chemotherapy and radiotherapy, by controlling the position of the irradiating beam and/or the absorbed doses.
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.
Photocatalytic deoxygenation reactions for the reduction of CO2, SO2 and N2O

SL-DRF-19-0989

Research field : Chemistry
Location :

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

Laboratoire de Chimie Moléculaire et de Catalyse pour l'Energie

Saclay

Contact :

Thibault CANTAT

Starting date : 01-10-2019

Contact :

Thibault CANTAT
CEA - DRF/IRAMIS/NIMBE/LCMCE

01 69 08 43 38

Thesis supervisor :

Thibault CANTAT
CEA - DRF/IRAMIS/NIMBE/LCMCE

01 69 08 43 38

Personal web page : http://iramis.cea.fr/Pisp/thibault.cantat/

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

The catalytic reduction of CO2, in the presence of solar irradiation, is an attractive approach to access useful chemicals, from renewable carbon and energy sources. While a narrow scope of products are currently available from the photoreduction of CO2, this doctoral project aims at producing lactones, which can serve as monomers in the preparation of polyesters, from CO2 and epoxydes. This success will rely on the developpement of efficient molecular photocatalysts and selective carbonylation catalysts able to promote a cascade where CO2 is reduced to carbon monoxide before its insertion in an epoxyde.

The knowledge derived from the design of efficient deoxygenation photocatalysts will serve as the starting point to explore a virgin research field: the deoxygenation of SO2 and N2O, two problematic gases for the environment. In particular, the photochemical reduction of SO2 to SO and the deoxygenation of N2O to N2 will be sought after.

 

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