2,368 Works

Magnetic excitations as a function of field in the topological f-electron magnet CeAgBi2

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Recently, the first f-electron skyrmions were reported to emerge in a row of Gd-based bulk materials including Gd2PdSi3. In contrast to the well known skyrmion materials like MnSi, these f-electron skyrmions do not require inversion symmetry breaking. Yet, an account of the underlying spin-spin interactions that instead lead to skyrmion lattice order remains elusive. Neutron spectroscopy, a technique that typically qualifies for the study of the microscopic interactions, is prevented in these materials due to...

Magnetic excitations as a function of field in the topological f-electron magnet CeAgBi2

, , , &
Recently, the first f-electron skyrmions were reported to emerge in a row of Gd-based bulk materials including Gd2PdSi3. In contrast to the well known skyrmion materials like MnSi, these f-electron skyrmions do not require inversion symmetry breaking. Yet, an account of the underlying spin-spin interactions that instead lead to skyrmion lattice order remains elusive. Neutron spectroscopy, a technique that typically qualifies for the study of the microscopic interactions, is prevented in these materials due to...

Combined SANS, UV-visible and fluorescence to resolve assembly mechanisms in native silk

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Due to the chemical and structural complexities inherent to biological processes, the simultaneous combination of experimental techniques is necessary to gain reliable information about the mechanism and molecular basis for fibril/fibre assembly. A specific example is the role of reactive intermediates during the assembly of protein superstructures, such as in gelation, crystallisation, and fibrillation. Therefore, our aim, using the promising NUrF (Neutron small-angle scattering – UV-visible - Fluorescence) platform at Larmor, is to uniquely extract...

Revealing the impact of the lipid composition on PfEMP1-membrane interactions

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Cerebral malaria is the most severe neurological complication of the infection by the parasite Plasmodium falciparum. During the blood phase of the infection, which is responsible for the pathology of this disease, the parasites invade red blood cells (erythrocytes). Infected erythrocytes (IEs) express variable surface antigens known as Plasmodium falciparum erythrocyte membrane proteins 1 (PfEMP1). This adherence and accumulation of IEs at endothelial surface causes occlusion of blood vessels in the brain leading to lethal...

Tuneable-Membrane Protein Containing Floating Bilayers: Enhancement of Complexity Resolution through Differential Hydrogen Labelling

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We have developed self-assembled floating supported membranes which contain intergral membrane proteins such as the COVID receptor angiotensin converter enzyme 2 (ACE2). This biologically accurate and easy to assemble sample system is self-assembled onto a Oligo-Ethylene-Oxide (OEG) Self-Assembled Monolayer (SAM) coated gold surfaces using a two step self assembly process. The distance of the resulting floating protein-lipid membranes from the bulk interface can be tuned by changing the solution salt conditions. we are at a...

Ammonia adsorption in defect-engineered Zr-based metal-organic frameworks

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Ammonia adsorption in a defect-engineered metal-organic framework, UiO-67, will be investigated by in situ neutron powder diffraction. Information will be obtained about the crystal structures of defect-engineered UiO-67 as a function of ammonia loading, as well as the location of ammonia molecules within the porous structures. It will help us to interpret the interaction between ammonia molecules and UiO-67 structures as well as how it leads to controllable ammonia adsorption. This work will lead to...

Nuclear and Magnetic Structure Analysis of a Novel Perovskite Nickelate

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Perovskite nickelates, with general formula A3+NiO3, are of considerable interest due to their electronic and magnetic features, which are closely tied to their structural parameters as the A3+ cation is varied (A3+ = Ln, Tl or Bi). Using high pressure synthesis, we find that we can make a novel nickelate perovskite, InNiO3. This new nickelate expands the series significantly, as In3+ is now the smallest cation in the series. We require neutron diffraction data in...

Chipir commercial access: NUCLETUDES

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“electronics boards”

Measurements of single-event burn-out of HV power devices for different technology nodes

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High-voltage power semiconductor devices, such as IGBTs, diodes and MOSFETs are susceptible to destructive failure due to terrestrial cosmic radiation (CR). As a consequence, device development has to ensure adequate radiation hardness for every device technology. In order to reduce testing times accelerated irradiation tests at facilities with a nucleon energy spectrum close to the natural terrestrial CR are essential. Infineon has organized irradiation test campaigns on a regular basis. A detailed description of power...

The structure of THF-water mixtures and clathrates in nanoscale confinement

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Tetrahydrofuran (THF) is a small organic molecule in which four carbon atoms are joined together by an oxygen atom to form a ring (https://en.wikipedia.org/wiki/Tetrahydrofuran). THF is a liquid at room temperature and is extremely valuable as an industrial solvent, for example in processing polyvinyl chloride (PVC) and 3D printing. THF itself dissolves in water, to form mixtures that are used in the liquefaction of plant-based biomass and formation of biofuels. In addition, at 4C and...

New low surface energy surfactants at oil-water interfaces

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Despite their super efficiency and industrial relevancy, severe environmental and human-health threats of fluorinated surfactants (FSURFS) are apparent1,2. Dichain trimethylsilyl (TMS) hedgehog surfactants (Figure 1) are credible replacements for FSURFS as chemically stable, environmentally benign super-efficient 21st century surfactants3. The aqueous aggregation and surface properties of TMS-hedgehogs have been explored3; however, their role in stabilizing liquid-liquid interfaces (i.e. emulsifiers) is very little studied. Contrast-variation SANS experiments are proposed here in order to understand structure-performance relationships...

Molecular Architecture of Lipid Nanoparticles using SANS

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Lipid nanoparticles (LNPs) are composed of a mixture of a cationic ionisable lipid, distearoylphosphatidylcholine (DSPC), cholesterol, and a PEG-lipid. Significantly, LNPs are increasingly being investigated as a means to deliver RNA, partially because of their use as the vehicle used to deliver the mRNA in the COVID-19 vaccines produced by Moderna and Pfizer/Biontech [1]. While lipid nanoparticles (LNPs) are approved in use for RNA delivery, the speed of their development and subsequent regulatory approval has...

CHRONUS Commissioning

Structure of doped chromates

CHRONUS Commissioning

Magnetic structure of PdCrO2

Calibration cycle 17-2

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Energy-Resolved Local Magnetic Correlations of YBCO

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Registration Year

  • 2022
    2,368

Resource Types

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Affiliations

  • University of Warwick
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  • University of Warwick - Warwick Business School
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  • Imperial College London
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  • Chatham House
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