Soft Complex Matter

In the field of soft matter, many complex new systems are flourishing. The emergence of these newfound capabilities, many of which marry different technologies and components, and work at the nanometer scale (1-100 nm) has become a major current trend. At LLB, research has progressed in similar directions, though some of the historical specificities of the lab, such as polymer research, are kept as main components.

With the advantages of neutron scattering in mind (i.e., labeling and contrast matching), we often marry the reciprocal space (SANS and SAXS) with other techniques, either in real space or at macroscopic scales. The following topics are presently developed: nanoparticles and hybrid systems; organic systems and self-organization; polymer dynamics; and electrostatic complexes. We will consider multicomponent systems that involve polymers, while differentiating between:

  1. systems where one of the components is intrinsically nanosized (e.g., nanoparticles or nanopores), and the relevant structure and dynamics can be kept at a comparable size, depending on its interactions with the polymer;
  2. systems where the architecture of the basic elements is bound to lead to self -organization at the nano- or micro-scale.

Presentation of the "Soft Matter and Biophysics" axis (Sept 2011).

 
#1980 - Màj : 04/04/2014
Domaines Techniques
Neutron diffusion make possible to probe the matter and its sensitivity to the light elements and to magnetism make it a single and original probe. Within IRAMIS, neutron spectrometry is used in various fields in fundamental and applied research and is developed around the CEA-CNRS Laboratory Leon Brillouin (LLB) around the Orphée reactor in Saclay. Neutrons are mainly intended for the study of condensed matter.

Quasi-elastic scattering

Neutrons
Faits marquants scientifiques
08 avril 2020
Aline Maire du Poset, Mikaela Börjesson, Céline Rameau, Claire Madeleine-Perdrillat, Adrien Lerbret, Camille Loupiac, Fabrice Cousin, Ali Assifaoui We show here how the structure of polygalacturonate (polyGalA) hydrogels cross-linked by Ca2+ cations via external gelation controls the loading and release rate of beta-lactoglobulin (BLG), a globular protein.
20 juin 2019
A. Theodoratou, L.-T. Lee, J. Oberdisse and A. Aubert-Pouëssel, Langmuir 35(20) (2019) 6620. Abstract : Nanofilms of about 2 nm thickness have been formed at the air–water interface using functionalized castor oil (ICO) with cross-linkable silylated groups.
30 mai 2019
"Dynamics properties of photosynthetic microorganisms probed by incoherent neutron scattering" Daniela Russo, Maya Dimova Lambreva, Christiane Alba Simionesco, Pierre Sebban, and Giuseppina Rea Biophysical Journal, 116 (9) (2019) 1759-1768 Studies on the dynamical properties of photosynthetic membranes of land plants and purple bacteria have been previously performed by neutron spectroscopy, revealing a tight coupling between specific photochemical reactions and macromolecular dynamics.
04 mars 2019
Marguerite Léang, Didier Lairez, Fabrice Cousin, Frédérique Giorgiutti-Dauphiné, Ludovic Pauchard, Lay-Theng Lee During evaporative drying of a colloidal dispersion, the structural behavior at the air-dispersion interface is of particular relevance to the understanding of the consolidation mechanism and the final structural and mechanical properties of the porous media.
12 décembre 2018
Souha Ben Mahmoud, Wafa Essafi, Annie Brûlet and François Boué The chain conformation in sulfonated polystyrene PSSNa of a degree of sulfonation 0.34 ≤ f ≤ 1, i.e., of various hydrophobicity, is followed in mixtures of water and increasing content of tetrahydrofuran (THF), a good solvent of the hydrophobic polystyrene moieties (which improves the solvent quality of the mixture).
20 novembre 2018
Jyotsana Lal This article is dedicated to the memory of Loic Auvray The results on Winsor phases, droplet and bicontinous microemulsions phases with polymer-grafted lipids studied by Small Angle Neutron Scattering (SANS) are reported below, together with the contrast variation techniques used to characterize the average curvature in the system.
09 août 2018
Maelenn Chevreuil, Didier Law-Hine, Jingzhi Chen, Stéphane Bressanelli, Sophie Combet, Doru Constantin, Jéril Degrouard, Johannes Möller, Mehdi Zeghal and Guillaume Tresset The survival of viruses partly relies on their ability to self-assemble inside host cells. Although coarse-grained simulations have identified different pathways leading to assembled virions from their components, experimental evidence is severely lacking.
04 mai 2018
Anne-Sophie Robbes, Fabrice Cousin , Florian Meneau, and Jacques Jestin We probe by SANS the conformation of polymer chains of the matrix in various nanocomposites based on the same building blocks, namely spherical magnetic nanoparticles of maghemite (γ-Fe2O3) as fillers and polystyrene (PS) for the matrix.
17 avril 2018
Structural characterization of nanoparticles formed by fluorinated poly(2-oxazoline)-based polyphiles, Anna Riabtseva, Leonid I. Kaberov, Laurence Noirez, Vasyl Ryukhtin, Corinne Nardin, Bart Verbraeken, Richard Hoogenboom, Petr Stepanek, Sergey K. Filippov, European Polymer Journal 99 (2018) 518.
24 mars 2018
Cationic thermoresponsive poly(n-vinylcaprolactam) microgels synthesized by emulsion polymerization using a reactive cationic macro-raft agent L. Etchenausia, E. Deniau, A. Brûlet, J. Forcada and M. Save,  Macromolecules  (2018) sous presse.
26 octobre 2017
Raphael Dos Santos Morais, Olivier Delalande, Javier Pérez, Liza Mouret, Arnaud Bondon, Anne Martel, Marie-Sousai Appavou, Elisabeth Le Rumeur, Jean-François Hubert, and Sophie Combet Obtaining structural information on integral or peripheral membrane proteins is currently arduous due to the difficulty of their solubilization, purification, and crystallization (for X-ray crystallography (XRC) application).
31 juillet 2017
Three-legged 2,2′-bipyridine monomer at the air/water interface: monolayer structure and reactions with Ni(II) ions from the subphase, Wenyang Dai, Lay-Theng Lee, Andri Schütz, Benjamin Zelenay, Zhikun Zheng, Andreas Borgschulte, Max Döbeli, Wasim Abuillan, Oleg V. Konovalov, Motomu Tanaka and A.
27 mai 2015
Les travaux effectués sur ces systèmes au Laboratoire de Chimie des Polymères Organiques visent à déterminer les conditions chimiques et physico-chimiques d'élaboration de telles vésicules ainsi que leurs propriétés.
09 mars 2015
Le stockage de l'énergie électrique est un des grands challenges de la transition énergétique en cours. Les batteries d'accumulateurs de puissance de type lithium-ion, avec en particulier leurs applications dans le transport, sont l'objet de nombreux efforts de recherche pour en améliorer les performances.
02 juin 2014
Si l'imagerie par absorption–diffusion de rayons X nous est plus familière, une imagerie similaire peut être obtenue avec un faisceau de neutrons.
20 janvier 2014
Toute cellule biologique est entourée d'une membrane constituée principalement d'une bicouche lipidique. Le rôle de cloisonnement de ces membranes les met au cœur de toute communication cellulaire (au sens large de "transport" d'une information d'une cellule à une autre, tel que le simple échange d'une molécule, par exemple).
15 novembre 2012
Stabiliser des gouttes d’huile dans l’eau n'est pas si simple, ces deux liquides ayant une tendance naturelle à se séparer afin de minimiser l'aire de leur interface de contact. Ceci est pourtant indispensable dans la vectorisation de certains médicaments, ou la réalisation de crèmes en cosmétique.
Publications HAL
Thèses
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Images
Quasi-elastic scattering
Soft Complex Matter
Dispersion de gouttelettes cristallisées, stabilisées par des particules solides : l\'association de deux principes, pour une distribution bien maitrisée
Dispersion de gouttelettes cristallisées, stabilisées par des particules solides : l\'association de deux principes, pour une distribution bien maitrisée
Dispersion de gouttelettes cristallisées, stabilisées par des particules solides : l\'association de deux principes, pour une distribution bien maitrisée
Dispersion de gouttelettes cristallisées, stabilisées par des particules solides : l\'association de deux principes, pour une distribution bien maitrisée
IMAGINE : la nouvelle station d’imagerie neutronique du Laboratoire Léon Brillouin
IMAGINE : la nouvelle station d’imagerie neutronique du Laboratoire Léon Brillouin
IMAGINE : la nouvelle station d’imagerie neutronique du Laboratoire Léon Brillouin
Mécanisme physique de l\'inclusion de molécules dans les membranes biologiques : formation de pores
Mécanisme physique de l\'inclusion de molécules dans les membranes biologiques : formation de pores
Mécanisme physique de l\'inclusion de molécules dans les membranes biologiques : formation de pores
Des accumulateurs Li-ion à la puissance décuplée à base de nanotubes de carbone ?
Des accumulateurs Li-ion à la puissance décuplée à base de nanotubes de carbone ?
Des accumulateurs Li-ion à la puissance décuplée à base de nanotubes de carbone ?
Des accumulateurs Li-ion à la puissance décuplée à base de nanotubes de carbone ?
Structure de nano-vésicules hybrides lipides-polymères
Structure de nano-vésicules hybrides lipides-polymères
Structure de nano-vésicules hybrides lipides-polymères
Structure de nano-vésicules hybrides lipides-polymères
Three-legged 2,2′-bipyridine monomer at the air/water interface: monolayer structure and reactions with Ni(II) ions from the subphase
Contrast-Matched Isotropic Bicelles: A Versatile Tool to Specifically Probe the Solution Structure of Peripheral Membrane Proteins Using SANS
Cationic thermoresponsive poly(n-vinylcaprolactam) microgels synthesized by emulsion polymerization using a reactive cationic macro-raft agent
Melt Chain Conformation in Nanoparticles/Polymer Nanocomposites Elucidated by the SANS Extrapolation Method: Evidence of the Filler Contribution
Nonequilibrium self-assembly dynamics of icosahedral viral capsids packaging genome or polyelectrolyte
The curvature changes induced by grafted polymers in microemulsions
How Necklace Pearls Evolve in Hydrophobic Polyelectrolyte Chains under Good Solvent Addition: A SANS Study of the Conformation
Structuration of the surface layer during drying of colloidal dispersions
Dynamics properties of photosynthetic microorganisms probed by incoherent neutron scattering
Equilibrium protein adsorption on nanometric vegetable oil hybrid film/water interface using neutron reflectometry
Controlled Loading and Release of Beta-Lactoglobulin in Calcium-Polygalacturonate Hydrogels
Structural characterization of nanoparticles formed by fluorinated poly(2-oxazoline)-based polyphiles

 

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