Synchrotron SOLEIL

Integrating Drug Physicochemistry and Hfq-Dependent Regulation of Ciprofloxacin Accumulation in Escherichia coli

Ciprofloxacin (CIP), an amphoteric fluoroquinolone, undergoes pH-dependent changes in protonation state that influence membrane permeability and intracellular accumulation. Here, we investigated how drug physicochemistry and bacterial regulatory pathways jointly determine CIP acc...

Reimpregnation of Disordered Mesopores by Ionic Liquids

Abstract The reimpregnation, i.e., replacement of the soft-templating ionic liquid (IL, BMIM-TFSI) that forms the porosity during the synthesis of disordered mesoporous silica-based (ionosilica) materials, has been studied by an original combination of small-angle X-ray scatterin...

Oxygen Evolution Electrocatalysts with Trinuclear, Mixed‐Valence Iron Motifs on Electronically Aligned Carbon Dots

ABSTRACT The oxygen evolution reaction (OER), a bottleneck for water electrolysis, remains limited by the adsorbate scaling relations and sluggish interfacial electron transfer (IET). We address these challenges by anchoring mixed‐valence Fe 3+ /Fe 2+ motifs on aspartic‐acid–deri...

Domain‐Wall Circulation Gating and Pinning via Compositional Engineering of Cylindrical Nanowires

ABSTRACT Spintronic devices based on cylindrical magnetic nanowires have been proposed as a route toward three–dimensional (3D) information storage and processing by harnessing the controlled motion of domain walls (DWs). In this geometry, the Bloch‐point wall (BPW) is the charac...

Impact of Fluorine Content on Structure, Redox, and Electrochemical Performance of Disordered Rock-Salt Li1.25Mn0.5+ y /2Nb0.25– y /2O2– y F y Electrode Materials

Abstract Disordered rocksalt (DRS) oxides are highly promising positive electrode materials for next-generation Li-ion batteries, yet their practical application is severely bottlenecked by the irreversibility of oxygen-redox processes. Fluorination (O2– by F– substitution) repre...

Suppression of spectral gap and flat bands on a cuprate superconductor side-surface

Abstract Side surfaces of cuprate superconductors are expected to display a suppressed d -wave order parameter and zero-energy topological flat bands with a large density of states, making them susceptible to symmetry broken orders. Yet such surfaces have never been investigated...

Marine arsenate evolution during Proterozoic oxygenation events and implications for biological phosphate metabolism

Abstract Earth’s atmosphere and oceans experienced two major episodes of ocean-atmosphere oxygenation that transformed the planet and shaped the evolution of the oxygen-rich biosphere between 2.45 and 0.541 billion years ago (Ga). These changes increased the abundance of oxidized...

Multimodal imaging reveals no evidence for magnetite-based magnetoreceptors in the mole-rat eye

Magnetoreception is widespread across animals, but its sensory mechanism remains unresolved. One leading hypothesis proposes that single-domain magnetite is coupled to mechanosensitive ion channels. In subterranean Ansell's mole-rats, such receptors have been proposed to reside i...

Transient Laser‐Induced Periodic Surface Structures Revealed by Time‐Resolved EUV Diffuse Scattering

ABSTRACT The formation of permanent laser‐induced periodic surface structures (LIPSS) on solid surfaces under impulsive laser irradiation above the damage threshold has been the subject of extensive research. Here, we report the formation of transient quasi‐periodic surface modul...

Depletion of davemaoite in Earth’s ambient lower mantle

Abstract The mineralogy of the Earth’s lower mantle is fundamental to understanding the planet’s formation, composition, evolution, and dynamics. However, uncertainties in the elastic properties and phase transitions of CaSiO₃ davemaoite—the third most abundant phase in a pyrolit...

Element-Specific DonorNumbers for Anions

Abstract Anion interactions with cations/molecules are crucial across chemistry and biology: in battery electrolytes, synthesis, atmospheric processes, and protein denaturation. Selecting the optimum anion represents an immense challenge, as anion interactions are diverse and com...

Step-ScanInterferometry for High-Fidelity HyperspectralNanoscopy

Abstract Fourier transform infrared nanospectroscopy (nano-FTIR) is an increasingly adopted characterization method that leverages decades of established knowledge in infrared spectroscopy at the nanoscale. It enables detailed characterization of composite materials and nanophoto...

Reversible Oxygen Redoxin High Voltage for Lithium-RichLayered Oxides

Abstract Lithium-rich layered oxides, characterized by Li ions in the transition-metal layers, can significantly increase battery energy density through the introduction of oxygen redox. However, these cathodes often suffer from substantial voltage hysteresis, leading to a consid...

Transmission diffuse EUV scattering by nanoscale Lamb waves in thin membranes

We report time-resolved diffuse extreme ultraviolet (EUV) scattering measurements of optically excited acoustic waves in thin Ti/SiN bilayers in transmission geometry. Following femtosecond optical excitation, the EUV diffuse scattering signal yields circular fringe patterns evol...