Crystallography, Magnetic Resonance and Modeling Laboratory

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CRISP

Crystallography and Structure-Property Relationships

The CRISP team is interested in understanding the fundamental mechanisms that link structural organization and its dynamics to the physical or chemical properties of materials. We contribute to the development of advanced crystallographic methods for the study of complex structures (macles, modular structures, disordered structures) and structural organization at the nanoscale (nanocrystallography), as well as for the determination and precise analysis of the electron density in crystalline solids (electron density topology, joint refinement). The team develops an instrumental platform (equipped with a hybrid pixel detector) for crystallographic studies under constraints (diffraction under electric field, photocrystallography, diffraction under pressure) and for time-resolved crystallography. The research topics find applications in the field of functional molecular materials, switchable materials, minerals, as well as for systems of biological interest.

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Members

Methodology and instrumental developments in crystallography, nanocrystallography and crystallography under constraints

The determination of structure-property relationships requires the development of new methods and original and novel instruments for advanced crystallographic studies at all spatial and temporal scales.

Mathematical Crystallography

Mathematical crystallography applies algebra to the description and rationalization of the atomic arrangement in a crystal structure, which is responsible for the structure-properties relationships of condensed matter.

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Nanocrystallography

We determine and study the structures of molecular nanomaterials or functional nanocomposites by total X-ray scattering and PDF-pair distribution function modeling.

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Methodological developments in charge and spin densities

We develop methods and associated software (MOLLYNX) allowing the joint determination of the electron density distribution and the spin density of magnetic materials.

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Structure and dynamics by crystallography under constraints

We are developing a multi-stress crystallographic platform (pressure, laser, electric field, very low temperature) allowing both structural studies and the monitoring of changes in the physical properties of functional materials subjected to an external perturbation.

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Structure and dynamics of functional materials and nanomaterials in the field of energy and health

The complementarity of our methodological and experimental approaches allows us to study precisely the behavior of materials with remarkable physical or chemical properties, such as magnetic, optical, electronic, caloric, structural properties, and to understand the fundamental mechanisms involved.

Functional materials and materials for energy

Study of the correlations between crystal structure, structural dynamics, and magnetic, optical, ferroelectric, or multiferroic properties of inorganic, molecular and hybrid crystals.

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Functional nanomaterials

Study of nanocomposites made of photocommutable molecules confined in porous crystalline matrices of MOF type or in organized mesoporous thin films.

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Materials for health

Understanding the mechanisms involved in bioactive glasses, effect of confinement on the structural organization of physiological fluids.

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