Thesis, internship, and post-doc opportunities
169 results found
[Thèse]
Controlled synthesis in ionic liquids of nanoparticles of oxophilic metals for microelectronic applications
Offer N°: 5628
This work aims at developing new routes for the elaboration of metallic nanoparticles (NPs) with transition metals from groups 4 to 7. These nanoparticles could be formed either by reduction under H2 or by electrochemical means. These metals are used in a number of applications in the microelectronic industry, but are only accessible by expensive ultra-vacuum processes (PVD, CVD and derived techniques).
This work aims at developing new routes for the elaboration of metallic nanoparticles (NPs) with transition metals from groups 4 to 7. These nanoparticles could be formed either by reduction under H2 or by electrochemical means. These metals are used in a number of applications in the microelectronic industry, but are only accessible by expensive ultra-vacuum processes (PVD, CVD and derived techniques).
[Thèse]
Study of formation and repair of DNA damage in aniamls exposed to yperite
Offer N°: 5512
Yperite is a war gas used during World War I but that remains a threat because of possible terrorist uses. This chemical induces severe burns of the skin and lung disorders. It is also involved in the induction of cancers. Formation of DNA damage, and in particular addition products to nucleic bases, lies among the possible molecular mechanisms of the action of yperite.
Yperite is a war gas used during World War I but that remains a threat because of possible terrorist uses. This chemical induces severe burns of the skin and lung disorders. It is also involved in the induction of cancers. Formation of DNA damage, and in particular addition products to nucleic bases, lies among the possible molecular mechanisms of the action of yperite. Although partly removed by repair systems, these damage may induce cell death or, in case of replication of cells bearing degraded genome, apparition of mutations. It is thus of importance to delineate the correlation between dose of yperite, amount of DNA adducts, efficiency of DNA repair and appearance of symptoms.
This will represent the subject of the thesis work, in a research project that will involve the laboratory “Lesions of Nucleic Acids” (INAC/SCIB) of the CEA-Grenoble and a group of the Departement of Toxicology of the Institute for Biomedical Research of the Army (IRBA, Grenoble). The first part of the work will consist in the set-up of a method for the measurement of yperite DNA adducts by liquid chromatography associated to mass spectrometry. This tool will then be applied to studies on small animals exposed to yperite through the skin. Dose/effects relationship will be studied between the level of DNA damage and the severity of the symptoms. These results will be completed by investigation of the DNA repair. In addition, measurements will be performed within the DNA of internal organs because yperite efficiently diffuses through blood circulation.
The experimental work is strongly interdisciplinary and candidates with different backgrounds may apply. Because biological studies are focused on small animals, biologists or biochemists with a first experience in animal experimentation will be welcome. They will be trained to the analytical part of the project by the CEA team. Conversely, analytical chemists may also apply bearing in mind that they will have to be trained for the animal work, this being done mostly by the IRBA group.
[Thèse]
Diffusion and rheology of ionic liquid based electrolyte for lithium batteries
Offer N°: 5490
The lithium batteries are currently developped at CEA for theapplication to electric vehicles with an important car constructor. Lithium batteries are mainly constituted of two electrodes positive and negative and an electrolyte. The currently used electrolyte is a lithium salt dissolved in a carbonate solvent and a co-solvant (ether type) for minimizing the viscosity and insuring a large ionic conductivity.
The lithium batteries are currently developped at CEA for theapplication to electric vehicles with an important car constructor. Lithium batteries are mainly constituted of two electrodes positive and negative and an electrolyte. The currently used electrolyte is a lithium salt dissolved in a carbonate solvent and a co-solvant (ether type) for minimizing the viscosity and insuring a large ionic conductivity. For electrochemical stability and security reasons, new electrolyte based on ionic liquid are developped. It appears necessary to understand the transport properties and the rheological properties of these new systems over the requireed temperature range. The PhD thesis will be devoted to characterize the rheological properties of new ionic liquid systems with or without co-solvents and the diffusion properties will be determined using nuclear Magnetic Resonance and neutron quasielastic techniques.
[Thèse]
From predictive modelisation of band structure in SiGe material to analytical tools for electrical characterization of 32nm PMOS and below
Offer N°: 5652
An accurate simulation of carrier distribution in semiconductor is required for MOS transistor in order to account efficiently of C(V), Id(Vg) and Ig(Vg) characteristics. Indeed, only this knowledge authorizes a reliable identification of dielectric thickness, effective work function, fixed charges, interface states and internal dipoles.
An accurate simulation of carrier distribution in semiconductor is required for MOS transistor in order to account efficiently of C(V), Id(Vg) and Ig(Vg) characteristics. Indeed, only this knowledge authorizes a reliable identification of dielectric thickness, effective work function, fixed charges, interface states and internal dipoles. Such simulation is also important to identify carrier distribution (energy quantization and wave function distribution in inversion condition which are so important to understand mobility, tunneling current and reliability.
Such simulation is tricky especially for PMOS including SiGe material, due to: (i) complex E(k) relationship for holes;(ii) impact of SiGe composition; (iii) complex hetero structure (Si/SiGe/Si) ; (iiii)strain specific impact.
The purpose of this study will be to go from advanced tools capable of complex band structure simulation (k-p simulation) to more simple tool which includes their result but authorizes their application with a significant reduction of computation times ( Poisson Schrödinger with effective mass, CV and IV simulation). Such applications will then authorize an effective and accurate analysis of electrical results as well as a validation of theoretical models.
Send to a friend
Fiche complète
Fermer
