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Livia Bove02/06/2025, 13:45Invited Oral
1 IMPMC, CNRS-UMR 7590, Université P&M Curie, 75252 Paris, France
2 Physics Department, Università di Roma La Sapienza, piazzale Aldo Moro 5, 00196, Roma, Italy
3 LQM, Physics Department, Ecole Politecnique Federale Lausanne, Lausanne, Swiss.Over the past decade, computer simulations [1–3] have predicted the existence of a novel and intriguing phase of water, termed "Plastic water." This...
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Lucile Mangin Thro (ILL)02/06/2025, 14:15Invited Oral
The D7 neutron diffuse scattering instrument at the Institut Laue-Langevin [1] has been an important experimental tool in the study of disordered materials, making use of neutron polarization analysis to provide a clean and unambiguous separation of the magnetic, incoherent, and structural contributions to the scattering.
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D7 has been disassembled, and the new D007 [2] started its... -
Quentin Berrod (CNRS SyMMES)02/06/2025, 14:45Invited Oral
Solid-state batteries have attracted significant interest as promising candidates for high energy density and safe battery technology. However, they commonly experience low ionic conductivity at ambient temperature, which limits their power density. This study addresses this issue by developing a porous separator with one-dimensional (1D) nanometric channels that confine non-flammable ionic...
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Benoit Coasne (CNRS/Univ. Grenoble Alpes)02/06/2025, 15:45Oral
Beyond well-documented confinement and surface effects arising from the large internal surface and severely confining porosity of nanoporous hosts, the transport of nanoconfined fluids remains puzzling by many aspects. With striking examples such as memory, i.e. non-viscous, effects, intermittent dynamics and surface barriers, the dynamics of fluids in nanoconfinement challenges classical...
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Armand Devillez (Université Grenoble Alpes, CNRS, Institut Néel, 38042 Grenoble, France)02/06/2025, 16:00Oral
Following the proposed materialization of Kitaev-bond-dependent spin liquid physics in honeycomb lattices of heavy transition metals with 4d or 5d electrons [1], it has been proposed that this can be extended to 3d transition metals, in particular Co2+ [2]. A first step in validating the prospect of finding a quantum spin liquid is to demonstrate the presence of these anisotropic...
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Dr Fabrice Cousin (Laboratoire Léon Brillouin)02/06/2025, 16:15Oral
We will show in this contribution how the combination of SANS and SAXS allows for a detailed monitoring of the respective evolutions of the structure of fillers by SAXS and conformation of polymeric chains by SANS under uniaxial stretching at various elongation ratios in a nanocomposite made of spherical magnetic nanoparticles of γFe2O3 dispersed in a matrix of polystyrene (PS) chains [1]. The...
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Nathan BUJAULT (Institut Neel, CNRS & Univ. Grenoble Alpes)02/06/2025, 16:30Oral
Dy2Ti2O7 and Ho2Ti2O7 classical spin ice compounds have been extensively studied over the past 30 years. Their excitations, described as emergent magnetic monopoles, exhibit very slow dynamics at low temperature, which manifests by a freezing and a strong irreversibility in Zero Field Cooled - Field Cooled (ZFC-FC) magnetization measurements. It has been proposed that in spin ices made of...
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Celine Durniak (European Spallation Source ERIC)02/06/2025, 16:45Oral
The European Spallation Source (ESS) will operate a suite of diffractometers. One of the first operational instruments will be DREAM [1], a diffractometer developed and built for ESS by the consortium Forschungszentrum Jülich (Germany) and Laboratoire Léon Brillouin (France).
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To ensure smooth operation even for the first-time users, the ESS Data Management and Software Centre is developing an... -
Kyriakos KARYOS (CEA/LLB)02/06/2025, 18:15Poster
ICONE (Innovative COmpact NEutrons facility) is a project of a French High-Intensity Compact Accelerator-driven Neutron Source (HiCANS) aimed at delivering an instrument suite for the French scientific community at the 2035 horizon. ICONE will produce neutrons by accelerating protons to an energy 25 MeV and impacting them on a Beryllium target. The resulting neutrons will then be moderated to...
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Shiyu Deng (Institut Laue-Langevin)02/06/2025, 18:30Poster
The proximity of SrTiO$_3$ to a ferroelectric quantum critical point (FE QCP) has become a promising new branch of the study of quantum critical phenomena. New forms of quantum order have been reported in SrTiO$_3$, different from the quantum paraelectric state via dielectric measurements. The critical point here is associated with a soft optical phonon mode responsible for the ferroelectric...
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Dr Ioanna Chazapi (Laboratoire Léon Brillouin, Université Paris-Saclay, CEA-CNRS UMR 12 CEA Saclay, 91191 Gif sur Yvette, France)02/06/2025, 18:45Poster
Solubilization of hydrophobic compounds in water is commonly performed by the addition of organic solubilizers through (i) micellar or hydrotropic solubilization using amphiphilic molecules[1], (ii) co-solvency using water-soluble solvents, and (iii) host–guest complexation using macrocycles[2]. In this study, we show that the...
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Thomas MARESCOT (LLB)02/06/2025, 19:00Poster
Nanoporous materials, such as mesoporous silicas (e.g., MCM-41 and SBA-15) and metal-organic frameworks (MOFs), exhibit unique properties that make them essential for various applications, including catalysis, separation, and energy storage. A key aspect of energy storage in these materials is the intrusion of water into their pores, a process that converts mechanical energy into interfacial...
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Xinxin HE (Pennsylvania State University)02/06/2025, 19:15Poster
Underground hydrogen storage (UHS) in coal seams presents a compelling opportunity for scalable, low-carbon energy storage, yet the fundamental understanding of hydrogen transport in such complex porous media remains limited. In this study, we explore hydrogen diffusion in coal using quasielastic neutron scattering (QENS), a technique uniquely suited to capturing molecular-scale dynamics of...
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Frederic Ott (IRAMIS / Laboratoire Léon Brillouin CEA-CNRS)02/06/2025, 19:30Poster
HiCANS, High Current Accelerator-based Neutron Sources, is a concept proposed several years ago which aims at revisiting how neutron sources suitable for neutron scattering could be built [1]. The concept of HiCANS relies on technical progress in accelerator technology, neutron moderator design and neutron instrumentation developments to be able to propose a source using a low energy...
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Christos Likos (Univiersity of Vienna)03/06/2025, 08:45Invited Oral
Linear polymers in shear flow display a dominant mode of dynamics known as tumbling, around the vorticity axis, whereby the two ends exchange their places, accompanied by a temporary compression of the chain in the gradient direction. We will demonstrate that topological polymers respond to shear in dramatically different ways, emerging from a coupling between topology and hydrodynamics. In...
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Paul McClarty (Laboratoire Léon Brillouin)03/06/2025, 09:15Invited Oral
Altermagnetism usually refers to the set of collinear compensated magnets at weak spin-orbit coupling whose crystal symmetries do not enforce spin degeneracy. In these systems, one expects an anisotropic pattern of spin splitting in momentum space in the electronic bands. In the magnon bands, one expects a similar pattern of chirality splitting. This talk will be dedicated to explaining how to...
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Anne Martel (ILL)03/06/2025, 09:45Invited Oral
Membrane proteins are responsible of all the communication between living cells and their environment. Despite their basic and therapeutic interest, their are under-represented in our structural biology knowledge due to the intrisic difficulties presented by their production, purification and handling. Nanodiscs are a great tools to study them in their native lipidic environment, and to study...
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Sophie Combet (CNRS)03/06/2025, 13:15Oral
Membrane proteins play essential roles in cellular function and are prime therapeutic targets, yet their structural characterization remains a major challenge. Despite advances in artificial intelligence, including AlphaFold, accurately predicting their structures is still difficult. These proteins make up 30% of the proteome and 60% of drug targets, yet they are vastly underrepresented in the...
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Lorenzo Metilli (Laboratoire Léon Brillouin)03/06/2025, 13:30Oral
Small-angle neutron scattering (SANS) is a ubiquitous technique for the study of static & dynamic properties of condensed matter at the mesoscale. The ever-increasing demand in SANS beamtime requires the development of new instruments with high scientific throughputs.
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The SAM project was submitted in that spirit during the 'Endurance 2' call of the Institut Laue Langevin (ILL). The... -
Gozde Oney (CEA-IRIG)03/06/2025, 13:45Oral
L’imagerie neutronique, sensible aux noyaux atomiques plutôt qu’à la densité électronique, constitue un outil puissant pour l’étude des batteries Li-ion, permettant notamment d’observer des éléments peu détectables par les rayons X, comme l’hydrogène et le lithium-6. Dans cette étude, nous exploitons cette technique pour analyser la distribution locale du lithium et identifier les...
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Dr Felix MORINEAU (Institut Néel)03/06/2025, 14:00Oral
Pyrochlore oxides with the formula R2M2O7 (R representing a rare-earth element and M a metal ele-ment) consist of two interpenetrating pyrochlore lattices, and are a rich playground to stabilize unconven-tional magnetic frustrated phases [1]. In this family, Nd-based compounds exhibit intriguing physics due to the dipolar-octupolar nature of the Nd3+ ground state doublet [2]. In particular, at...
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Dr Florence PORCHER (ESS, Lund (Sweden) & LLB, CEA/Saclay (France))03/06/2025, 14:15Oral
The modelling of adsorption or confinement of organic molecules in zeolite crystals is a long story, not only because of the infinite possibilities offered by the intrinseque properties of the guest molecules and of the framework topologies.
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The simplest family of such inclusion compounds is probably the (dye@zeolite) one. A priori the properties arising from the inclusion of simple dyes,... -
Olivier Diat (ICSM)03/06/2025, 19:00Invited Oral
Superchaotropic nano-ions have recently captivated attention for their remarkable ability to adsorb onto hydrated neutral surfaces or bind strongly to some cavities of macrocyclic molecules.They indeed exhibit a range of fascinating behaviors:
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1. Dramatically increasing the cloud point of non-ionic surfactant systems.
2. Triggering conformational changes in thermo-sensitive polymers in... -
03/06/2025, 19:30
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Dr Philippe Bourges (LLB CEA Saclay)04/06/2025, 09:00Invited Oral
The first neutrons from the European Spallation Source are expected to arrive on November 9, 2025.BIFROST will be the first operating spectrometer at ESS. BIFROST is an indirect geometry instrument. It will explore quantum materials, for example, to understand the role of magnetism in superconductors, as well as to measure phonon and magnon spectra in functional materials. The instrument will...
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Elisa Rebolini04/06/2025, 09:30Invited Oral
The analysis of neutron data in the context of magnetic structure relies heavily on the fitting of the parameters of an effective Hamiltonian model. The complexity of the systems under study leads to the increase of the number of parameters of these models and a good starting guess for the fit becomes crucial. Ab initio calculations on these systems can provide quantitative estimate for the...
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Hanna Wacklin-Knecht (European Spallation Source ERIC)04/06/2025, 10:00Invited Oral
Millions of people suffer life-threatening fungal infections, but there are no vaccines, and only a few antifungal agents, whose application is often restricted by toxicity, resistance and low bioavailability. Most antimycotic drugs target ergosterol residing in fungal membranes, but their precise mechanisms of action, toxicity and resistance development are still unclear. A fuller...
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Lucas Fine (ILL)04/06/2025, 11:00Oral
Hydride-ion (H-) conductors attract more and more interest for their potential application as solid electrolytes in, e.g., batteries, fuel cells, and for catalysis. A particularly promising class of hydride-ion conductors are nitride-hydrides, which accommodate both nitride ions and hydride ions in the same substructure. Recently, the new nitride-hydride $\mathrm{Ca_3CrN_3H}$ was discovered...
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Christian Beck04/06/2025, 11:15Oral
Background:
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Understanding the diffusive properties of colloidal suspensions is essential for exploring fundamental transport mechanisms, optimizing industrial formulations, developing advanced materials, and enhancing biomedical and pharmaceutical applications. Short-time diffusion is predominantly influenced by hydrodynamic interactions. Quasielastic neutron scattering (QENS) offers a... -
Pascale Launois (Laboratoire de Physique des Solides)04/06/2025, 11:30Oral
Hydrogen is the carbon-free fuel par excellence because its combustion emits only water. Research has focused on H2 storage in lightweight materials for the needs of vehicles, excluding clays due to their weight. But large-scale terrestrial storage for industrial applications does not require the same specifications. In this context, clay minerals offer several interesting properties, such as...
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Cyril PICARD (UGA)04/06/2025, 11:45Oral
Deformation of superhydrophobic cylindrical mesopores is studied during a cycle of forced water filling and spontaneous drying by in situ small-angle neutron scattering. A high-pressure setup is put forward to characterize the deformation of ordered mesoporous silanized silica up to 80 MPa. Strain isotherms of individual pores are deduced from the shift of the Bragg spectrum associated with...
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Apostolos Vagias (D22 co-responsible)04/06/2025, 13:30Oral
Institut Max von Laue- Paul Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France (vagias@ill.fr)
The concept of softness is encountered in different materials of the everyday life, although its precise quantification is still far to be achieved. In thin films of soft matter, quite often compounds that are energetically incompatible have to be mixed. The softness of the emerging...
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Alexis CHENNEVIERE (Laboratoire Léon Brillouin, CEA Saclay)04/06/2025, 14:00
1 Université Paris Saclay, Laboratoire Léon Brillouin, UMR 12 CNRS-CEA, CEA-Saclay,91191, Gif-sur-Yvette, France
The ICONE project aims to develop a compact neutron source (HiCANS – High Current Accelerator-driven Neutron Source) to serve the needs of the French scientific community. Within this framework, the SAMBA instrument (Small Angle Measurements for Broad Applications) is being...
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Laura Chaix (Institut Néel, CNRS and Université Grenoble Alpes, 38042 Grenoble, France)04/06/2025, 14:30Invited Oral
As they often stabilize with complex non-collinear magnetic structures, frustrated magnets are potential candidates for type-II multiferroism, where both magnetic and electric orders appear at the same temperature and are strongly coupled [1]. In these materials, the proper understanding of the coupling between spin and charge degrees of freedom is a key to identify the microscopic mechanism...
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Hugo RONCIN (CEA)04/06/2025, 15:30Oral
For two decades, pharmaceutical industries have developed a growing interest towards nanoparticles (NPs). The combination of pharmaceutical activity and nanoscale formulation offers many advantages such as better targeting and reduced toxicity of the drug, improvement of the pharmacokinetic to cite a few. However, the limited knowledge regarding some of their physicochemical characteristics...
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Alexandre Ivanov (ILL), Benoît Fauqué (Collège de France), Bertrand Roessli (Paul Scherrer Institut), Eric Ressouche (Université Grenoble Alpes, CEA, IRIG, MEM, MDN, 38042 Grenoble, France), Francoise Damay (LLB), Françoise Le Berre (Institut des Molécules et Matériaux du Mans), Dr Frederic Bourdarot (CEA-Grenoble), Jérôme Lhoste (Institut des Molécules et Matériaux du Mans), OLIVIER DEMORTIER (Laboratoire Léon Brillouin, CEA Saclay), Romain Sibille (Paul Scherrer Institut), Sylvain Petit (LLB CEA-CNRS-Université Paris-Saclay), Tom Fennell (Paul Scherrer Institut), claire colin (Institut Néel, CNRS & Université Grenoble Alpes)04/06/2025, 15:45Poster
KTb3F10 is a terbium-based compound with a cubic structure (Fm-3m space group), in which the magnetic Tb ions form an unusual network of corner sharing octahedra [1-4]. Tb ions sit on the 24e Wyckoff site (C4n point group) and are surrounded by 8 fluorine atoms, forming a slightly distorted dodecahedra cage. Interestingly, because of the cubic three-fold symmetry, there are three possible...
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Suzanne Lafon (LIPHY, CNRS)04/06/2025, 16:00Oral
Controlling the structure of polymer solutions near a solid surface is crucial for many industrial processes as it significantly impacts solution flow and influences slip at the interface. To date, only a few techniques have been developed to experimentally investigate this type of interface at the nanometric scale of solid/liquid interactions. In this study, we probe the interface between a...
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Shiyu Deng (Institut Laue-Langevin)04/06/2025, 16:15Oral
We report the emergence of a polar metal phase in layered van der Waals compound FePSe$_3$. This Mott insulator with antiferromagnetic order offers a unique opportunity to fully tune an insulator into a polar metal state with pressure, without doping-induced disorder or impurities. Our synchrotron and neutron diffraction data unambiguously show a structural transition and loss of the inversion...
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Xavier FABREGES (Laboratoire Léon Brillouin, CEA/CNRS Saclay, France)04/06/2025, 16:30Oral
Since the shutdown of the Orphée reactor, France is missing a national neutron facility to support its scientific community. Neutron sources worldwide are progressively transitioning from traditional reactor-based sources (such as ILL, Orphée, and FRM II) to pulsed sources (ESS, SNS, J-PARC). In parallel, the development of High Current Accelerator-driven Neutron Sources (HiCANS) offers a...
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Cecilia Herrero Guillen (Institut Laue Langevin)04/06/2025, 17:00Oral
Fluids at solid interfaces are central to key technologies in energy conversion, electrochemistry, and catalysis, yet their nanoscale dynamics remain only partially understood. On metallic surfaces, recent studies have revealed unconventional interfacial phenomena—including complex electrostatic screening, anomalous wetting behavior, and quantum friction—that call for new modeling tools...
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Bruno Guerard (ILL)04/06/2025, 17:15
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Thomas Zemb (CEA/ICSM)04/06/2025, 17:30Oral
SAXS emerged in India in the group of Raman, then in the fifties of Kratky centered on the study of the empty cell by André Guinier in France and a dialogue of Kratky and Porod with Svedberg about proteins in solution. In the seventies and eighties absolute scaling at low-q and asymptotic laws at high-q started to be measured and were concomitant to the birth of science at nano-scale. ...
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Giovanna Fragneto (European Spallation Source ERIC)05/06/2025, 08:30
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Jacques Jestin (ILL)05/06/2025, 08:40
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Marie Plazanet (Laboratoire Interdisciplinaire de Physique)05/06/2025, 08:50
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Arnaud Desmedt05/06/2025, 09:00
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Michel Kenzelmann (Paul Scherrer Institut)05/06/2025, 09:30
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Sean Freeman (CERN)05/06/2025, 09:40
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charles simon (LNCMI CNRS)05/06/2025, 09:50
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Jean Daillant (ESRF)05/06/2025, 10:00
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Kristina Djinovic Carugo (EMBL)05/06/2025, 11:00
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Sandrine Lyonnard (CNRS SyMMES)05/06/2025, 11:10
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Jean-Francois Perrin05/06/2025, 11:20
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Noel Jakse (SIMAP Grenoble-INP-UGA)05/06/2025, 11:30
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Christiane Alba-Simionesco (LLB)Oral
We present a novel in situ sample environment for neutron scattering, inspired by soft matter techniques but to our knowledge never before implemented at large-scale facilities. Based on controlled centrifugation, this setup enables the application of accelerations from 1000 to 5000 g, generating stable density gradients that induce phase transformations and nanophase separation directly...
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Ketty Beauvois (CEA Grenoble)
Bénédicte Henry Canudas & Ketty Beauvois (CEA Grenoble), Catherine Chazette (ILL)
L’inclusion au travail : un droit, une nécessité
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Cette intervention débutera par un cadrage clair : définition de l’inclusion professionnelle et rappel des obligations légales. Car inclure, c’est permettre à chacun de s’épanouir au sein de son environnement de travail, sans se heurter à des barrières... -
Bruno Guerard (ILL)
The XtremeD, D16, and D20 instruments have recently been equipped with large-area, curved, position-sensitive 33He neutron detectors based on the Trench-MWPC (Multi-Wire Proportional Chamber) technique, initially introduced at the ILL in 2017. These detectors offer a unique combination of wide angular coverage, high spatial resolution, and excellent counting rate capabilities. Their...
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Marie Plazanet (Laboratoire Interdisciplinaire de Physique)Oral
Firoz Malayil Kalathil, Marie Plazanet, Ingo Hoffmann, Sylvain Prévost, Thomas Zemb & Christiane Alba-Simionesco.
Ternary mixtures of oil, water and an hydrotrope can lead to complex and usable organization in terms of reactivity or solubility. This is the case of aqueous solutions of ethanol and oil, typically found in all kind of liquors, cosmetics or solvents for liquid-liquid...
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