Service Interdisciplinaire sur les Systèmes Moléculaires et les Matériaux

The “Service Interdisciplinaire sur les Systèmes Moléculaires et les Matériaux” is a fundamental research division which gathers about fifty permanent people (CEA, CNRS, university) and a score of students of all levels. Research studies can be divided in two major topics: nanochemistry and radiolysis. The main application domains are technologies of health, nanosciences and fundamental research for nuclear programs of the CEA.

Nanochemistry deals with supra molecular assemblies and ultra divided matter and uses specific characterisation techniques coupled with simulations of short and long distance interactions between molecules and/or ions. The main aims of the researches are the detailed understanding of molecule – metal coordination and interaction, the synthesis and/or the assembling of molecular species with specific properties and the physical chemistry of complex fluids, ultra divided matter and liquid interfaces.

Linear nanosecond electron pulse accelerator (10 MeV) used in radiolysis studies

Radiolysis is tackled by the study of physico-chemical and biochemical processes that occur during matter irradiation. Research mainly concerns the primary events of the radiolysis, the influence of confined media and solid - liquid interfaces on water radiolysis, the irradiation under extreme conditions of temperature and pressure and the biochemistry under irradiation.

#477 - Màj : 03/10/2022

Domaines Techniques

Diffusion des Rayons X aux petits angles / Small Angle X-Rays Scattering (SAXS)

X-rays are used to investigate the structural properties of solids, liquids or gels. Photons interact with electrons, and provide information about the fluctuations of electronic densities in heterogeneous matter. A typical experimental set-up is shown on Figure : a monochromatic beam of incident wave vector is selected and falls on the sample. The scattered intensity is collected as a function of the so-called scattering angle 2 teta.

A high sensitivity Small Angle X-Ray Scattering (SAXS) experiment

High resolution calibrated Ultra Small Angle X-ray Scattering (USAXS) on a laboratory source

Molybdenum Wide Angle X-Ray Scattering (WAXS)

What is measured in a Small Angle X-ray Scattering (SAXS) ?

Diffusion des Rayons X aux petits angles / Small Angle X-Rays Scattering (SAXS)

Control command system for experiments with TANGO

Laboratory experiments are increasingly composed of electronic hardware and computer controlled. In most cases the quality of the equipment (mechanical, electronics) is very good but the software is inadequate and not very flexible to the needs of researchers. LIONS chose to use the open source control system TANGO developed by a collaboration of European synchrotrons ans scientific institutes (ESRF, SOLEIL...).

Android application for TANGO control system : TANGOwatch

Python interface for TANGO

TANGO Device server concept

Using TANGO for controlling a microfluidic system with automatic image analysis and droplet detection

Mass spectrometry

Mass spectrometry is an instrumental technique of analysis resting on the separation, identification and quantification of the components of a sample according to their mass. Thus atoms, molecules or aggragates are extracted in the form of ions, then sorted by a dispersive system: sector of electric or magnetic field, quadripolar filter or time of flight.

Inductively coupled mass spectrometry (ICP-MS) Analysis

Rayons X

Les rayons X, rayonnement électromagnétique au delà de l'ultra-violet lointain, couvrent une gamme de longueur d'onde autour du dixième de nanomètre. Cette distance est de l'ordre de la distance entre atomes dans la matière condensée. Ainsi les rayons X peuvent interagir avec ces atomes (diffraction) ou les électrons (diffusion).

Molybdenum Wide Angle X-Ray Scattering (WAXS)

X-rays

x-rays, electromagnetic radiation beyond the remote ultraviolet ray, cover a range wavelength around the tenth of nanometer. This distance is about the distance between atoms in the condensed matter. The diffraction of x-rays thus makes it possible to probe the matter, and to obtain information on the structure, the order and the composition of materials.

Molybdenum Wide Angle X-Ray Scattering (WAXS)

Scientific Data Analysis

pySAXS, an Open Source Python package and GUI for SAXS data treatment

Using ImageJ for SAXS image data reduction

Utilisation de Python pour l'analyse des données

Raman microspectroscopy at NIMBE/LAPA

The Raman microspectrometry is an analytical device of primary importance to characterize the crystalline structure of materials. It is a complementary technique to micro X-ray diffraction. This technique is well suited to characterize and determine the distribution of the phases formed in the corrosion layers of iron or steels during very long periods in various environments. Iron oxides, oxy-hydroxides and carbonates are the main phases encountered in these systems.

Voir aussi

Anatomic scale : In collaboration with chemists from ENS Lyon and from CEA/iBiTeC-S and CBM Orléans, MRI experiments on living rodents are undertaken. 129Xe NMR-based biosensors designed to target a pulmonary disease are instilled in the lungs of the anesthetized animal. The acquisition is then performed just after the introduction of hyperpolarized xenon, which can occur many times and several tens of minutes after the biosensor instillation.

Laboratory 'Structure and Dynamics by Magnetic Resonance' : Version française The Laboratory 'Structure and Dynamics by Magnetic Resonance' (LSDRM) belongs to NIMBE, UMR CEA/CNRS 3685. The research axes are centered on the conception and the use of new NMR tools. Cutting edge methods and original approaches are proposed, from instrumental developments to molecular simulations.

Faits marquants scientifiques

15 février 2010

Record of distance for solid state NMR!

Chemists of DSV (CEA-Life science Division) and physicists of DSM (CEA-Matter science Division) specialists of Nuclear Magnetic Resonance (NMR) have developed a new solid state NMR apporach to measure long inter-atomic distances. Based on the use of tritium, the hydrogen isotope with the highest sensitivity to NMR, this technique allows the determination of the conformation of small molecules bounded to their biological receptors.

25 mars 2005

Corrosion of iron archaeological artefacts in soil: characterisation of the corrosion system.

D. Neff, P. Dillmann, L. Bellot-Gurlet*, G. Béranger**

One of the most important technological challenge of the century is the safe storage of nuclear wastes. In France, one part of the engineered barrier designed to separate the biosphere from wastes is a low alloy steel overpack. Thus, it is necessary to predict the very long term corrosion behaviour of this overpack for several centuries.

Corrosion of iron archaeological artefacts in soil: characterisation of the corrosion system.

Publications HAL

Thèses

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Stages

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Images

Using ImageJ for SAXS image data reduction

$Utilisation de Python pour l\'analyse des données$

Inductively coupled mass spectrometry (ICP-MS) Analysis

Liquid-liquid extraction: Interface and extractant self-assembling properties.

What is measured in a Small Angle X-ray Scattering (SAXS) ?

Brevet : Nanodisques catanioniques cristallisés stabilisés. Procédé de préparation et applications

Brevet : Dérivés amphiphiles de cyclodextrines, leur procédé de préparation et leurs utilisations

$Brevet : Utilisation de mono-3,6-anhydrocyclodextrines pour solubiliser un composé hydrophobe et pour contrôler la pureté d\'un énantiomère, et procédé de préparation de ces cyclodextrines$