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PhD subjects

2 sujets IRAMIS

Dernière mise à jour : 19-04-2018


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• Analytic chemistry

 

In situ analysis of an organic redox flow cell through magnetic resonance and additive manufacturing

SL-DRF-18-0330

Research field : Analytic chemistry
Location :

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

Laboratoire Structure et Dynamique par Résonance Magnétique (LCF) (LSDRM)

Saclay

Contact :

Lionel DUBOIS

Patrick BERTHAULT

Starting date : 01-10-2018

Contact :

Lionel DUBOIS

CEA - DSM/INAC/SyMMES/CAMPE

04 38 78 92 57

Thesis supervisor :

Patrick BERTHAULT

CEA - DRF/IRAMIS/NIMBE/LSDRM

+33 1 69 08 42 45

Personal web page : http://iramis.cea.fr/Pisp/patrick.berthault/

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

In the thesis project we want to take advantage of our recent advances in 3D printing combined with the development of integrated dynamic nuclear magnetic resonance devices to study operating systems by NMR and perform in situ or operando experiments. We wish to apply these developments according to an important area of ??research in the field of energy: the identification and study of migrations of different molecular species generated during the operation of an organic redox flow battery (RFBO).



In this purpose it will be necessary to build a mini battery that will be integrated within a conventional NMR magnet. The solution flow in each of the compartments will be driven using our patented mini bubble Pump approach. Here the modularity of our low cost system will allow us to follow spectroscopy and imaging different molecular species in several positions of the battery. The components and geometry will be adapted to organic flow cells, the main goal being to understand and analyze the degradation mechanism and products of the redox molecule (anthraquinone derivatives) on the redox cycle.



The work requested from the doctoral student will go from a strong implication in the design of the mini-battery, to its construction and the magnetic resonance studies. In this area, dedicated protocols and new sequences, using both spectroscopic and recent MRI techniques, will have to be developed.

Digital Microfluidic hyphanated ICPMS : Droplet Generator introduction system study

SL-DRF-18-0452

Research field : Analytic chemistry
Location :

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

Laboratoire Interdisciplinaire sur l'Organisation Nanométrique et Supramoléculaire (LIONS)

Saclay

Contact :

Valérie GEERTSEN

Starting date : 01-10-2018

Contact :

Valérie GEERTSEN

CEA - DRF/IRAMIS/NIMBE/LIONS

0169084798

Thesis supervisor :

Valérie GEERTSEN

CEA - DRF/IRAMIS/NIMBE/LIONS

0169084798

Personal web page : http://iramis.cea.fr/nimbe/Pisp/valerie.geertsen/

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

More : http://iramis.cea.fr/nimbe/Phocea/Vie_des_labos/Ast/ast.php?t=projets&id_ast=2800

In the scope of the “Instrumentation and Detection” Transverse Competency CEA Project a new sample introduction system for inductively coupled mass spectrometer (ICPMS) is developed (Cleverest project). The sample is introduced as a cortege of size and velocity-controlled droplets produced within a water/oil emulsion on a digital microfluidics chip. Each droplet is analyzed by ICPMS. This digital droplet generator is a unique opportunity to better understand the sample ionization within ICP source argon plasma due to the control of droplets’ size, velocity and frequency.



The thesis work will consist in developing and studying digital microfluidic chips with well-defined droplets size. The coupling of such microsystems with the ICP spectrometry will lie at the center of the subject and should allow proposing ways to optimize the ICP ionization in order to increase the sensitivity of the instruments. The study will first focus on homogeneous samples before addressing the encapsulation of single nanoparticles in the drops and it sequential analysis (Single Particle ICPMS).



This interdisciplinary thematic requires team work ability, large scientific curiosity and mind openness. Instrumentation being a large component of this study, the candidate must show a commitment for experimental laboratory work. A competence in microfabrication, 3D printing or analytical chemistry will be fully appreciated.

 

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