cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5286/isis.e.rb1510646
title: E/T scaling and quantum critical fluctuations in Sr3Ru2O7

description: Nowadays, Fe3O4 iron oxide nanoparticles (Fe3O4 MNPs) have attracted attention as highly performing contrast agents for Magnetic Resonance Imaging technique (MRI), aiming to early detection of several pathologies, such as cancer [1]. However, some concerns about the biocompatibility are limiting their use in the biomedical field. Thus, we implemented a novel functionalization strategy, based on the use of phospholipids, known biocompatible molecules. The structure and the packing degree of the nanoparticle organic coating represent a fundamental variable in the development of biocompatible devices. Thus, we propose to characterize the functionalized Fe3O4 MNPs, focusing on the organization of the organic coating, performing elastic and quasi-elastic  neutron scattering, as well as small angle neutron scattering, experiments.
DOI: 10.5286/isis.e.rb1520047
title: Nanostructure of a New Class of Deep Eutectic Solvents Derived from Protic Ionic Liquids

description: In earlier SANDALS investigations we have shown that protic ionic liquids (PILs) are nanostructured in the bulk, and how dissolved inorganic salts and small molecule solvents influence nanostructure. PIL nanostructure results from attractive solvophobic interactions between amphiphilic cation alkyl chains, and becomes better defined as the cation alkyl chain length is increased. We have recently developed a class of amphiphilic deep eutectic solvents (DES) with ion structures derived from PILs we have studied previously. This work will elucidate the nanostructure of 1:2 mixtures of urea with ethylammonium bromide (EABr), propylammonium bromide (PABr) and butylammonium bromide (BABr) to reveal the effect of cation alkyl chain length on nanostructure in these DES.
DOI: 10.5286/isis.e.rb1520193
title: Tracking the evolution of nano-precipitates in vanadium micro-alloyed steels via SANS

description: Third Generation Advanced High Strength Steels (AHSS) require higher strength and formability alongside a lower alloying element content for reduced energy consumption and CO2 emissions during production, transportation, use and recyclability. Steels with small amounts of alloying elements such as V, Mo, Nb, Ti, (also called micro-alloyed steels), are potential candidate materials fitting these requirements by forming nano size precipitates. Quantification of precipitate evolution during steel processing is therefore essential to understand the effect of micro alloying elements on the strengthening of steels. This proposal is a part of an ongoing EPSRC funded (£600K from Sep. 2014-Sep. 2017) project, which aims to develop new micro-alloyed steels with enhanced strength. This project is collaboration between the University of Warwick, the Diamond-Manchester Collaboration, and Tata steel.
DOI: 10.5286/isis.e.rb1520267
title: Micelle formation from model surfactant binary and ternary compositions in the presence of electrolyte

description: The effects of electrolytes on SLES3, C12E8 and LAS4 has been extensively studied, especially the effect on the critical micelle concentration of each surfactant. We wish to extend these studies to temperatures as low as 10oC and, in particular, at low concentrations. Previous studies have shown variations in micelle formation with temperature at low concentrations; the addition of electrolyte will help quantify this behaviour and provide information on bulk behaviour of these surfactants at lower temperatures.
DOI: 10.5286/isis.e.rb1820017
title: Search for spin excitations and spin resonance in ThFeAsN1-xOx (x=0 and 0.3)

description: Recently, the first nitrogen-containing iron pnictide superconductors ThFeAsN, has been discovered with Tc = 30 K. We have investigated the gap symmetry in ThFeAsN using musr. Interestingly by tuning the oxygen doping levels in ThFeAsN1-xOx, two superconducting (SC) domes are found, one for x=0-0.15 with Tc below 30 K and the second one fpr x=0.2=0.6 with maximum Tc = 15 K. In iron pnictides, superconductivity always emerges beside the stripe type AFM order, forming an asymmetry dome with maximum Tc near the critical point of AFM region.  Spin fluctuations may mediate the electron pairings and establish the correlations and condensations, representing as an order-parameter-like spin resonance cantering around certain energy (ER) which is linearly scaling with Tc . Here we proposed to investigate the spin resonance and also high energy spin fluctuations in ThFeAsN1-xOx  using MERLIN.
DOI: 10.5286/isis.e.rb1820391
title: Dynamics in Flexible Organic Multi-ferroics using Low Energy Neutron Scattering Spectroscopy

description: Flexible functional materials are important candidates of current research, because of their potential applications in plastic electronics. Organic ferroelectrics and multi-ferroics are of such kind of materials having applications in data and storage devices. Since flexibility, ferroelectricity  and magnetism are rare combinations, organic multi-ferroics are candidates of intense research promising of designing new multi-ferroics. Dynamics of hydrogens have important contributions in the performance of these organic multi-ferroics. To build on our previous knowledge on hydrogen bonded organic ferroelectrics, in this proposal we will  investigate dynamics of organic multiferroics TTF-BA [(H2C2S2C)2 - C6Br4O2] using QENS techniques and correlate the proton dynamics and multi-ferroic properties by searching for finger print motions.
DOI: 10.5286/isis.e.rb1820622
title: PNR determination of magnetic interface states and exchange coupling in hybrid anisotropy thin films

description: The atomic interfaces between ferromagnetically ordered thin films with perpendicular anisotropy and either films with magnetically ordered in-plane anisotropy or a non-magnetic metal are responsible for nearly all the exciting physics leading to potential devices in areas as diverse as broadband THz generation, DMi and Skyrmions, Spin Hall effects, Spin torque/Vortex oscillators (STO) and data storage. Understanding the magnetic structure of these atomically engineered interfaces as a function of depth is a key element in optimizing layer structures and developing the underlying physical insight necessary for exploitation.
DOI: 10.5286/isis.e.rb1868044
title: Investigation of segmental dynamics in polymer nanocomposite glasses with grafted nanoparticles: role of  interface wettability

description: Polymer nanocomposites are formed by embedding polymer grafted nanoparticles in homopolymer host matrix. Polymers form glasses when cooled through their glass transition temperature (Tg) and the dynamics at the nanoscale around this temperature ultimately control properties that can be tuned for important applications (eg. viscosity and rheology). Fragility is a parameter which characterizes the rate of dynamics near Tg, and hence gives information of the glass forming ability of polymers. The addition of nanoparticles alters their glass forming abilities and gives control on final properties. In this proposal we plan to use polymer nanocomposite glasses made from grafted nanoparticles to study the effect of wettability of nanoparticle/polymer interface on the segmental dynamics.
DOI: 10.3886/e109167v1-11104
title: Cora Dataset

description: The Cora data contains bibliographic records of machine learning papers that have been manually clustered into groups that refer to the same publication. Originally, Cora was prepared by Andrew McCallum, and his versions of this data set are available on his Data web page. The data is also hosted here. Note that various versions of the Cora data set have been used by many publications in record linkage and entity resolution over the years.
DOI: 10.5286/isis.e.rb1510535
title: Fast Neutron Irradiation of Eumelanin

description: The implementation of organic interfaces for electrical stimulation of cell-tissue constructs is a central goal in the rapidly expanding fields of bioelectronics and nanomedicine. Among the various Nature-inspired materials that hold promise for the design of bioelectronic interfaces, eumelanins, the black insoluble photoprotective biopolymers of human skin and eyes, occupy a prominent position. Both natural and synthetic eumelanins display peculiar optoelectronic properties, which are exemplified in a water-dependent semiconductor-like behavior, 2,10,11 broad band absorption, permanent paramagnetism. On this base, we plan to address eumelanin thin film properties after neutron irradiation, in order to investigate potential (expected) electro mutability increase.
DOI: 10.5286/isis.e.rb1520011
title: Magnetic vesicles: structure and composition

description: This proposal aims to explore composition behaviour of vesicles formed by aqueous mixtures of magnetically active cationic liquid surfactants (MILSs, Figure 3) with the oppositely charged SDS. SANS will be used to investigate the effects of mixture composition, surfactant and magnetic counterion type on aggregate size and shape as well as bilayer composition (MILS:SDS) and thickness. The original proposal RB1510030 was rejected, with the comments ?It is unclear what the expected result is beyond a simple layer thickness. Perform conductivity measurements to observe counterion release.? The new proposal addresses both of these points (see Figure 2 and Justification).
DOI: 10.5286/isis.e.rb1520063
title: Extreme Synergistic mixing in Biosurfactant ionic surfactant mixtures

description: The biobased economy growing substantially and pressure to reduce reliance on palm and crude oil derived materials, demand that Home and Personal Care industries develops frameworks for deploying sustainably sourced alternative materials. Biosurfactants tend to be very similar to nonionic and mild anionic surfactants but with significantly higher molecular weights. Saponins are naturally occurring glycolipids with between one and 5 sugar groups as headgroups and are of growing interest as natural detergents. We wish to understand the origins of a peculiar competition between a saponin derived from tea and a conventional surfactant where at very low concentrations the tea material significantly reduces the adsorbed amount of SDS (a common ingredient in toothpaste). this is vital in understanding how to formulate these materials in a sustainable bioeconomy.
DOI: 10.5286/isis.e.rb1520077
title: Magnetic order in new double-perovskite Pb2ScOsO6

description: Osmates in the perovskite-like structure are very topical. For example, recent discoveries include Slater transitions, and "ferroelectric-like" structural transitions. These arise because of structural distortions, geometric frustration, magnetism and strong spin-orbit coupling. We have recently synthesised a new cubic (Fm-3m) double perovskite material Pb2ScOsO6 using a high pressure method. Bulk measurements show at two phase transitions which are both accompanied by modifications of the susceptibility, indicating that the material an antiferromagnetic phase transition and a second phase transition that is either structural in origin or couples the spin and lattice degrees of freedom, presumably owing to the spin-orbit coupled Osmium. We propose to determine the magnetic and crystal structures of Pb2ScOsO6  as a function of temperature between 300 and 10K
DOI: 10.5286/isis.e.rb1520277
title: Spin Glass to Canted Antiferromagnetism in Pseudo-dipolar Pyrochlores

description: Magnetic frustration is of topical interest due to the functional applications within the next generation of electronics. Pyrochlores have contributed significantly within this field, however, the defect fluoride pyrochlore system with the general formula AM2F6, where A is an alkali metal, and M is one or more transition metals, has surprisingly been understudied in comparison to normal pyrochlores, such as Tb2TiO7. We propose to use GEM or POLARIS to investigate the diverse magnetic behavior produced by different metals on the same Fd3m lattice as well as the change in magnetic ordering as a function of x.
DOI: 10.5286/isis.e.rb1520307
title: Quasi-elastic neutron scattering study of reconstituted plant wax films and their principal components

description: A number of studies have determined that non-ionic surfactants are capable of altering diffusion rates and transportation of both water and active ingredients thorough the waxy ?barrier? of various crops, manipulating their morphology and structural integrity.By measuring the diffusivity and observing the change in the wax inelastic scattering with temperature, QENS will allow us to further observe changes in the morphology and role of the various wax components at different temperatures and moisture conditions. QENS would therefore allow us to investigate the conditions which affect the behaviour, structure and mobility of the major components which make up a large proportion of cuticular waxes. This will in turn allow us understand how surfactants help promote the transport of water and active ingredients into the plant.
DOI: 10.5286/isis.e.rb1520364
title: Understanding the microstructure of polymer blends used as control release coatings.

description: Solid oral dosage forms consist of polymer layer encapsulated drug-bound particles with a desired drug release profile e.g. pulsatile, controlled, delayed and targeted, depending upon the polymer(s) employed. Therefore, an intimate understanding of the solution phase polymer-polymer interactions during the deposition of the controlled release film formation is critical to ensure consistent performance (e.g. drug release & stability) of the product. The most common film former is ethylcellulose (EC), whereas the permeability enhancer is often hydroxypropyl methylcellulose (HPMC). Solvency has a pronounced effect on the miscibility of the two polymers within the dispersion, and the resultant film properties. Here, we wish to quantify the solution conformations by SANS of two such polymers in single and binary solutions as a function of solvent composition and temperature.
DOI: 10.5286/isis.e.rb1540010
title: NTC2015
DOI: 10.5286/isis.e.rb1600007
title: Commissioning the IMAT-Messina CCD camera: Performance tests and set-up of the data flow pipeline
DOI: 10.5286/isis.e.rb1820318
title: Investigating proximity effect in tunneling geometry across STO insulator in LSMO/STO/YBCO heterostructures on Polycrystalline Substrate

description: Intense research activity is underway to understand the interaction between ferromagnetic (FM) and superconducting (SC) layers in oxide FM/SC multilayers, where FM and SC layers are in contact.  Recently a number of studies have been reported in FM/SC multilayers on the proximity effect. specifically in oxide heterostructures. We have also studied  tunneling effect in Superconductor/Insulator/Ferromagnet oxide system. All these systems studied by us and others  were strongly textured. In the present proposal we want to make samples without texture and  study proximity and tunneling effect. We will use Si substrate with native amorphous oxide layer as substrate and oxide SC and FM layers deposited on it.
DOI: 10.5286/isis.e.rb1820455
title: Spin dynamics and exchange interactions in Na2RuO3: an inelastic neutron scattering study

description: Special attention has been devoted to the honeycomb iridates (Na, Li)2IrO3, in which SOC, intrinsic geometric frustration, and other competing interactions favor a highly anisotropic Kitaev exchange interactions that stabilizes exotic ground states such as quantum spin liquids (QSL). While such novel ground state has not yet been realized, largely due to competing isotropic interactions (Heisenberg) that stabilize magnetic order and/or lattice distortions that relieve geometrical frustration, searches for Kitaev and related QSLs are still ongoing. Here we propose to investigate the unexplored energy scales and relevant magnetic interactions present in the recently grown honeycomb ruthenate Na2RuO3 by means of powder inelastic neutron scattering. Along with our concurrent proposal submitted to WISH, we aim to establish the Hamiltonian describing the magnetic interactions in Na2RuO3.
DOI: 10.5286/isis.e.rb1820497
title: Coating dependance of the phonon density of states in LiFePO4 nanoparticles

description: LiFePO4 (LFP) is a commercially used Li ion battery material for high power applications. Particle shape and surface play an important role in the Li diffusion and thus the electrochemical performance of the material. After the successful experiment addressing the particle shape and size, we now propose to measure the surface phonon density of states of LFP as a function of surface coatings. Therefore, we kindly request five days of beam time at MARI. This will give us further insights on how surface phonon modes play a role in the size-dependent behavior of the lithium ion diffusion in LFP.
DOI: 10.5286/isis.e.rb1820578
title: FeNb11O29 intercalation materials for lithium-ion batteries: measuring the diffusion coefficient of lithium with muon spin relaxation

description: Muon spectroscopy is a great method for obtaining the properties of diffusion when ionic conductivity emerges, and furthermore gives with the advantage of measuring the native materials unperturbed by external measurement conditions.We propose a Muon spin relaxation experiment to study the diffusion coefficient of lithium in the intercalation compounds of FeNb11O29, which is emerging as potential anode materials for its capacitive properties and reversibility. Such result is achievable through the measurement of the muon spin fluctuation rate due to the motion of lithium.Our study aims to the understanding the microscopic picture of ionic conductivity, which is at the same time the keystone of the improvement of the existing material and the possibility of designing more advanced ones.
DOI: 10.5286/isis.e.rb1900056
title: Detector test for ChipIR

description: The range of application of high band-gap solid state detectors is expanding in those environments where the high neutron flux is an issue, such as in the high-flux spallation neutron sources. Single-crystal Diamond (SD) detectors have been characterized in the past  and they are currently installed at the ChipIr beam-line at ISIS as beam monitors. We are exploring the possibility of using SiC detectors as an alternative to SDs. In particular we would like to test the detector stability during neutron irradiation and then measure the Rotax neutron flux.
DOI: 10.5286/isis.e.rb1910014
title: High Pressure Thermoelastic Properties of Thermoelectric PbSe

description: We propose to study the effect of pressure and temperature on the crystal structure and the elasticproperties of lead selenide, an important material for conversion of waste heat into electricalpower. We have successfully analysed and published results on the sibling phases, lead sulfideand lead telluride, and request ISIS beam time to complete this series. We propose to measurethe behaviour of lead selenide at low temperature and high pressure to derive useful thermoelasticproperties for this compound including thermal expansion and isothermal compression. We aim toresolve a long standing scientific problem in this compound as to the crystal structure of itsintermediate phase
DOI: 10.5286/isis.e.rb1910147
title: Density-driven structural transformations in boro-germanate glass

description: The resistance of glass to fracture is crucial for its use as a structural material in fields ranging from engineering to architecture. Here, B2O3 can play a crucial role in improving crack resistance because of the ability of B atoms to transform from 3-fold to 4-fold coordination with increasing load. However, there is little in situ information on these stress induced structural transformations, where pressures in the GPa regime are readily generated on scratching or indentation. We will use in situ high-pressure neutron diffraction to investigate the structural changes in an archetypal boro-germanate glass, a structural analogue for commercially relevant boro-silicate glass, in which structural change occurs at accessible pressures. The results will be used to build models that relate the glass structure and its deformation to the material properties.
DOI: 10.5286/isis.e.rb1520080
title: Neutron Diffraction Studies of Polycrystalline CeCr1-xTixGe3 (x = 0, 0.5, 1.0)

description: Observation of both ferromagnetic ordering and Kondo/heavy fermion behavior in a system is not so common. Recently we have discovered the Kondo effect/heavy fermion behavior in the trivalent Ce compound CeCrGe3 where  itinerant Cr moments order ferromagnetically at Tc=70 K. A small anomaly near 3 K in the heat capacity data is likely due to ordering of localized Ce moments. As there are two magnetic sublattices in the system, investigation of the magnetic structure will be very exciting. Itinerant Cr moments in this system have a strong coupling with localized Ce moments which is quite evident from the results on CeCr1-xTixGe3. In this connection determination of magnetic structure of  CeCr1-xTixGe3 (x=0,0.5, 1.0) will be very interesting. We, propose to carry out neutron diffraction studies on these compounds.
DOI: 10.5286/isis.e.rb1520096
title: High-energy magnetic excitations in FeSe

description: FeSe (Tc = 9 K) being structurally the simplest iron based superconductor shows some exotic properties. For instance, it only undergoes a tetragonal-to-orthorhombic structural transition at Ts = 90 K while no long range magnetic order develops down to the lowest measured temperature leaving the spin fluctuations mediated paring mechanism in doubt. Our recent inelastic neutron scattering experiment have revealed the presence of strong magnetic fluctuations in this system as well. Moreover, we have observed a strong coupling between spin fluctuations and nematicity. Here we propose to use MERLIN to map out the high energy spin excitations to determine the exchange couplings across Ts and we expect a modification of the magnetic exchange couplings below Ts, as suggested theoretically.
DOI: 10.5286/isis.e.rb1520158
title: muSR studies of expanded fullerides across the superconductivity dome

description: FCC Cs3C60 can be driven to a bulk superconducting state without symmetry change by the application of pressure. Its Tc passes through a maximum of 35 K at 6 kbar. We have been recently successful in isolating the isostructural RbxCs3-xC60 family of materials with 0
DOI: 10.5286/isis.e.rb1520233
title: Model anionic/non ionic surfactant adsoption at the interface below room temperature

description: An experiment performed on INTER last year found extreme non ideal mixing between C12E8/SLES3 at the air water interface: this feature became more extreme as the temperature dropped from 25oC to 10oC. The promotion of C12E8 to the interface was much higher than previously expected. We wish to see if this effect is observed in other non ionic/anionic surfactant mixtures by studying C12E8/LAS4. LAS4 is much more surface active when compared to SLES3 because it has a branched alkyl chain, which increase its hydrophobicity. A comparison between the two systems will help characterise what is driving the increased adsorption.
DOI: 10.5286/isis.e.rb1520385
title: SANS study of formation of gels and foams from gelatin with metal salts

description: Recently, we have prepared highly active carbon catalysts for the oxygen reduction reaction in hydrogen fuel cells. These materials are synthesized easily by mixing metal nitrates with gelatin. Heating to ~80 °C results in formation of a foam, which is then converted to carbon if heated to 800 °C under nitrogen gas. The formation of the foam is a fascinating process, particularly since the structure can be changed dramatically with different metals, or with simple changes of pH. Furthermore, combinations of metals, such as iron and magnesium, can be used to create foams with very small 'bubble' size. The gel structure of gelatin in water is well understood. Gelatin molecules form triple helical 'junctions', locking together the individual polymer strands. SANS will allow us to study how metals change the structure of the gelatin, and why this has such a dramatic effect on foaming.