cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5286/isis.e.rb1920307
title: Solvation structure of propane/propene in [C4mim][NTf2] ionic liquid - II

description: There are great energy costs associated with the separation of the light olefins (ethylene and propylene) from mixed hydrocarbon gas feeds. These olefins (obtained from natural gas, biosources, or produced from recycling of waste hydrocarbons) are chemical starting materials for high-demand materials such as PET, PPE, PVC, lubricants and medications. Ionic liquids have been suggested as low energy intensive absorbent materials that could selectively capture and release these gases from mixtures without the need to use the expensive and energy intensive cryogenic distillation. This study aims to provide important contributions towards the understanding of hydrocarbon gas absorption and separations in ionic liquids at a molecular level. In turn this will allow desidesign of absorbents with improved performance leading to the evaluation of their use in an industrial setting.
DOI: 10.5286/isis.e.rb1920307-1
title: Solvation structure of propane/propene in [C4mim][NTf2] ionic liquid - II

description: There are great energy costs associated with the separation of the light olefins (ethylene and propylene) from mixed hydrocarbon gas feeds. These olefins (obtained from natural gas, biosources, or produced from recycling of waste hydrocarbons) are chemical starting materials for high-demand materials such as PET, PPE, PVC, lubricants and medications. Ionic liquids have been suggested as low energy intensive absorbent materials that could selectively capture and release these gases from mixtures without the need to use the expensive and energy intensive cryogenic distillation. This study aims to provide important contributions towards the understanding of hydrocarbon gas absorption and separations in ionic liquids at a molecular level. In turn this will allow desidesign of absorbents with improved performance leading to the evaluation of their use in an industrial setting.
DOI: 10.5286/isis.e.rb1920307-2
title: Solvation structure of propane/propene in [C4mim][NTf2] ionic liquid - II

description: There are great energy costs associated with the separation of the light olefins (ethylene and propylene) from mixed hydrocarbon gas feeds. These olefins (obtained from natural gas, biosources, or produced from recycling of waste hydrocarbons) are chemical starting materials for high-demand materials such as PET, PPE, PVC, lubricants and medications. Ionic liquids have been suggested as low energy intensive absorbent materials that could selectively capture and release these gases from mixtures without the need to use the expensive and energy intensive cryogenic distillation. This study aims to provide important contributions towards the understanding of hydrocarbon gas absorption and separations in ionic liquids at a molecular level. In turn this will allow desidesign of absorbents with improved performance leading to the evaluation of their use in an industrial setting.
DOI: 10.5286/isis.e.rb1920307-3
title: Solvation structure of propane/propene in [C4mim][NTf2] ionic liquid - II

description: There are great energy costs associated with the separation of the light olefins (ethylene and propylene) from mixed hydrocarbon gas feeds. These olefins (obtained from natural gas, biosources, or produced from recycling of waste hydrocarbons) are chemical starting materials for high-demand materials such as PET, PPE, PVC, lubricants and medications. Ionic liquids have been suggested as low energy intensive absorbent materials that could selectively capture and release these gases from mixtures without the need to use the expensive and energy intensive cryogenic distillation. This study aims to provide important contributions towards the understanding of hydrocarbon gas absorption and separations in ionic liquids at a molecular level. In turn this will allow desidesign of absorbents with improved performance leading to the evaluation of their use in an industrial setting.
DOI: 10.5286/isis.e.rb1920687
title: Measuring the spin-wave spectrum of the room temperature metal-organic spintronic material V[TCNE]2

description: Organic-based materials have found applications in a wide variety of devices, including light emitting diodes, photovoltaics, and field effect transistors. These take advantage of the low cost, chemical tunability, and mechanical flexibility of this class of materials. Vanadium tetracyanoethylene (V[TCNE]x~2) exhibits ferimagnetic order well above room temperature (TN &gt; 600K), and an ultra-narrow ferromagnetic resonance (FMR) linewidth , making it a competetive alternative to best-in-class inorganic materials. Despite its popularity, little is known about the microscopic nature of the magnetism in this material. Here, we propose to measure magnetic excitations on a solvothermally produced powder sample of V[TCNE] x~2, in order to obtain as much information as possible about the excitation in this material as is presently achievable with neutrons given sample limitations.
DOI: 10.5286/isis.e.rb1920687-1
title: Measuring the spin-wave spectrum of the room temperature metal-organic spintronic material V[TCNE]2

description: Organic-based materials have found applications in a wide variety of devices, including light emitting diodes, photovoltaics, and field effect transistors. These take advantage of the low cost, chemical tunability, and mechanical flexibility of this class of materials. Vanadium tetracyanoethylene (V[TCNE]x~2) exhibits ferimagnetic order well above room temperature (TN &gt; 600K), and an ultra-narrow ferromagnetic resonance (FMR) linewidth , making it a competetive alternative to best-in-class inorganic materials. Despite its popularity, little is known about the microscopic nature of the magnetism in this material. Here, we propose to measure magnetic excitations on a solvothermally produced powder sample of V[TCNE] x~2, in order to obtain as much information as possible about the excitation in this material as is presently achievable with neutrons given sample limitations.
DOI: 10.5286/isis.e.rb2000101
title: CHIPIR Commercial: neutron test on Mosfet from STMicroelectronics

description: the neutron test of MOSFET in Silicon and Silicon Carbide will be tested for automotive application.the test will be the product devices up to 1000V and we need your interlock system with our Keithely power supply.
DOI: 10.5286/isis.e.rb2000101-1
title: CHIPIR Commercial: neutron test on Mosfet from STMicroelectronics

description: the neutron test of MOSFET in Silicon and Silicon Carbide will be tested for automotive application.the test will be the product devices up to 1000V and we need your interlock system with our Keithely power supply.
DOI: 10.25810/rxtv-eb29.19
title: German Newspaper Coverage of Climate Change or Global Warming, 2004-2019 - October 2019

description: The Media and Climate Change Observatory Data monitors 74 sources (across newspapers, radio and TV) in 38 countries in seven different regions around the world. Data is assembled by accessing archives through the Lexis Nexis, Proquest and Factiva databases via the University of Colorado libraries. More information may be found at: http://sciencepolicy.colorado.edu/icecaps/research/media_coverage/index.html. These data include Excel (.xlsx), CSV (.csv), and plain-text README files (.txt).
DOI: 10.5286/isis.e.rb1920010
title: Low-temperature structures of Prussian blue analogues for electrochemical applications

description: We propose a low-temperature diffraction study at POLARIS of Prussian blue analogues (PBAs) of general formula NaxMM'(CN)6, where 1 &lt; x 2. These systems currently attract intense research interest due to their potential applications as electrodes in sodium ion batteries. In order to fully understand the electrochemical processes, accurate structural models are vital. At present, the most favourable position of Na in the framework is debated and we believe that this diffraction study will be an important contribution to this discussion. Moreover, high Na content yields distortions of the metal-cyanide framework---analogous to octahedral tilting in perovskites. We aim to investigate the thermal response of the tilting, which currently is an underexplored area, in contrast to the work on tilting in perovskites. Our study is thus relevant to both applied and fundamental chemistry.
DOI: 10.5286/isis.e.rb1920010-1
title: Low-temperature structures of Prussian blue analogues for electrochemical applications

description: We propose a low-temperature diffraction study at POLARIS of Prussian blue analogues (PBAs) of general formula NaxMM'(CN)6, where 1 &lt; x 2. These systems currently attract intense research interest due to their potential applications as electrodes in sodium ion batteries. In order to fully understand the electrochemical processes, accurate structural models are vital. At present, the most favourable position of Na in the framework is debated and we believe that this diffraction study will be an important contribution to this discussion. Moreover, high Na content yields distortions of the metal-cyanide framework---analogous to octahedral tilting in perovskites. We aim to investigate the thermal response of the tilting, which currently is an underexplored area, in contrast to the work on tilting in perovskites. Our study is thus relevant to both applied and fundamental chemistry.
DOI: 10.5286/isis.e.rb1920185-3
title: Quantum critical dynamics in the presence of disorder

description: Quantum phase transitions are abrupt qualitative changes of a system's groundstate occurring only at exactly zero temperature. Such critical points - although never reachable  in their vicinity strongly impact many physical properties, even at comparably high temperatures. In fact, properties of many exotic materials are now linked to quantum phase transitions and these are studied intensely. Magnetic insulators make excellent model systems for such studies, as it is often possible to induce quantum phase transitions by applying a strong magnetic field or hydrostatic pressure. In the proposed experiment we study a compound that is quantum critical even at ambient fields and pressure as the quantum phase transition occurs as a function of chemical composition.
DOI: 10.5286/isis.e.rb1920233
title: Role of interstitial oxygen ordering on the spin excitation of Pr2-xSrxNiO4+d

description: Dynamics of charge and spin stripe in 214-type nickelets (La2-xSrxNiO4+d) have been investigated intensively in last two decades as similar electronic ordering was found in iso-structural high-Tc superconducting cuprates. What is still missing the limelight, is the highly oxygen doped compound. For the first time we evidence that different spin stripe modulations are directly scaled with the respective complex oxygen ordered supercell in the oxygen dope sample. We aim to verify the role of interstitial oxygen ordering on the spin microstructure and hence on the corresponding spin excitation in different oxygen dope samples.
DOI: 10.5286/isis.e.rb1920233-1
title: Role of interstitial oxygen ordering on the spin excitation of Pr2-xSrxNiO4+d

description: Dynamics of charge and spin stripe in 214-type nickelets (La2-xSrxNiO4+d) have been investigated intensively in last two decades as similar electronic ordering was found in iso-structural high-Tc superconducting cuprates. What is still missing the limelight, is the highly oxygen doped compound. For the first time we evidence that different spin stripe modulations are directly scaled with the respective complex oxygen ordered supercell in the oxygen dope sample. We aim to verify the role of interstitial oxygen ordering on the spin microstructure and hence on the corresponding spin excitation in different oxygen dope samples.
DOI: 10.5286/isis.e.rb1920233-2
title: Role of interstitial oxygen ordering on the spin excitation of Pr2-xSrxNiO4+d

description: Dynamics of charge and spin stripe in 214-type nickelets (La2-xSrxNiO4+d) have been investigated intensively in last two decades as similar electronic ordering was found in iso-structural high-Tc superconducting cuprates. What is still missing the limelight, is the highly oxygen doped compound. For the first time we evidence that different spin stripe modulations are directly scaled with the respective complex oxygen ordered supercell in the oxygen dope sample. We aim to verify the role of interstitial oxygen ordering on the spin microstructure and hence on the corresponding spin excitation in different oxygen dope samples.
DOI: 10.5286/isis.e.rb1920628
title: Investigation of the magnetic structure of the charge transfer compound CuTCNQ

description: Organic materials are playing an increasingly important role in electronic devices. An area of device technology where organics may make an impact is as memresistors, possibly in resistive random access memories . One material with potential is the charge transfer compound CuTCNQ (TCNQ = 7,7,8,8, -Tetracyanoquinodimethane), which exhibits electrical switching between low and high resistance states. One structural form of this material also exhibits magnetic order at low temperatures, the magnetism being associated with free radical electrons on the TCNQ molecules. The main goal of the proposed work is to use neutron scattering to identify the type of magnetic order that exists in the material. Neutron diffraction patterns will be recorded in the magnetically ordered phase and at a high temperature to look for intensity changes indicating the structure of the free radical magnetism.
DOI: 10.5286/isis.e.rb1920628-1
title: Investigation of the magnetic structure of the charge transfer compound CuTCNQ

description: Organic materials are playing an increasingly important role in electronic devices. An area of device technology where organics may make an impact is as memresistors, possibly in resistive random access memories . One material with potential is the charge transfer compound CuTCNQ (TCNQ = 7,7,8,8, -Tetracyanoquinodimethane), which exhibits electrical switching between low and high resistance states. One structural form of this material also exhibits magnetic order at low temperatures, the magnetism being associated with free radical electrons on the TCNQ molecules. The main goal of the proposed work is to use neutron scattering to identify the type of magnetic order that exists in the material. Neutron diffraction patterns will be recorded in the magnetically ordered phase and at a high temperature to look for intensity changes indicating the structure of the free radical magnetism.
DOI: 10.5286/isis.e.rb1920654-1
title: Solvation structures of cyclic compounds: the crown ethers

description: Crown ethers are cyclic molecules formed by joining ether groups into a ring. These compounds have many interesting solution properties, including their ability to bind strongly to certain cations. We request 4 days of beamtime on NIMROD to study the structure of concentrated and dilute solutions of 15-crown-5 (15 atoms in the ring, and 5 ether groups) in two different solvents: Methanol and Dimethyl Ether (DME). This proposal will enable us to determine the microscopic solvation of crown ethers in the presence and absence of hydrogen bonding, both with and without complexed ions. These experiments will exploit the unique ability of neutron scattering to elucidate of liquid structure, and will use isotopic labelling of the solvent molecules to highlight very subtle structural features. This approach will enable us to answer many fundamental questions regarding crown ether solvation.
DOI: 10.5286/isis.e.rb1920654-2
title: Solvation structures of cyclic compounds: the crown ethers

description: Crown ethers are cyclic molecules formed by joining ether groups into a ring. These compounds have many interesting solution properties, including their ability to bind strongly to certain cations. We request 4 days of beamtime on NIMROD to study the structure of concentrated and dilute solutions of 15-crown-5 (15 atoms in the ring, and 5 ether groups) in two different solvents: Methanol and Dimethyl Ether (DME). This proposal will enable us to determine the microscopic solvation of crown ethers in the presence and absence of hydrogen bonding, both with and without complexed ions. These experiments will exploit the unique ability of neutron scattering to elucidate of liquid structure, and will use isotopic labelling of the solvent molecules to highlight very subtle structural features. This approach will enable us to answer many fundamental questions regarding crown ether solvation.
DOI: 10.5286/isis.e.rb1920276
title: Microstrain evolution of multilayered Ti/X (X=Zr, Nb) composites under the effect of heterophase interfaces

description: The mechanical properties of multilayered metallic composites are determined by strain/stress partitioning between the constituent metals. However, the effect of strain on the deformation behaviour and the selection of deformation mechanisms in individual phases within the composites composed of at least one hcp constituent are still unclear, especially when the single layer thickness is only a few microns or even smaller. In this work, micromechanical behaviour and strain/stress distribution and evolution in multilayered Ti/X (X=Zr, Nb) composites will be measured by using the in-situ neutron diffraction technique. The evolution of microstrains that underlie the load sharing among the differently oriented grains and between the constituent metals will be traced under the applied stress. Then, the mechanism of strengthening and toughening in such a composite structure can be explored.
DOI: 10.5286/isis.e.rb1920276-1
title: Microstrain evolution of multilayered Ti/X (X=Zr, Nb) composites under the effect of heterophase interfaces

description: The mechanical properties of multilayered metallic composites are determined by strain/stress partitioning between the constituent metals. However, the effect of strain on the deformation behaviour and the selection of deformation mechanisms in individual phases within the composites composed of at least one hcp constituent are still unclear, especially when the single layer thickness is only a few microns or even smaller. In this work, micromechanical behaviour and strain/stress distribution and evolution in multilayered Ti/X (X=Zr, Nb) composites will be measured by using the in-situ neutron diffraction technique. The evolution of microstrains that underlie the load sharing among the differently oriented grains and between the constituent metals will be traced under the applied stress. Then, the mechanism of strengthening and toughening in such a composite structure can be explored.
DOI: 10.5286/isis.e.rb1920472
title: Quantum spin-liquid state in a triangular lattice of S = 1/2 spin trimers in KBa3Ca4Cu3V7O28

description: Geometrical frustration conspiring with quantum fluctuations in low-dimensional antiferromagnets has been demonstrated over the past years to lead to novel quantum states in condensed matter. Quantum spin liquids (QSL) on two-dimensional lattices are particularly intriguing, as they are extremely elusive and therefore poorly understood. Triangular lattice antiferromagnets are candidates for a QSL ground state if perturbations to the nearest-neighbour isotropic interactions are present. Here we focus on a novel triangular lattice of Cu2+ trimers in KBa3Ca4Cu3V7O28, which might host a QSL ground state, as all bulk measurement performed down to 50 mK so far failed to detect magnetic ordering. Therefore, we propose a muSR study in a sub-kelvin temperature range to unambiguously confirm the spin-liquid conjecture in KBa3Ca4Cu3V7O28 and to characterize its low-lying magnetic excitations.
DOI: 10.5286/isis.e.rb1920472-1
title: Quantum spin-liquid state in a triangular lattice of S = 1/2 spin trimers in KBa3Ca4Cu3V7O28

description: Geometrical frustration conspiring with quantum fluctuations in low-dimensional antiferromagnets has been demonstrated over the past years to lead to novel quantum states in condensed matter. Quantum spin liquids (QSL) on two-dimensional lattices are particularly intriguing, as they are extremely elusive and therefore poorly understood. Triangular lattice antiferromagnets are candidates for a QSL ground state if perturbations to the nearest-neighbour isotropic interactions are present. Here we focus on a novel triangular lattice of Cu2+ trimers in KBa3Ca4Cu3V7O28, which might host a QSL ground state, as all bulk measurement performed down to 50 mK so far failed to detect magnetic ordering. Therefore, we propose a muSR study in a sub-kelvin temperature range to unambiguously confirm the spin-liquid conjecture in KBa3Ca4Cu3V7O28 and to characterize its low-lying magnetic excitations.
DOI: 10.5286/isis.e.rb1920561
title: Interstitial oxygen and protons in zircon-type PrVO4-based mixed ionic-electronic conductors

description: Zircon-type PrVO4 was shown recently to be a mixed ionic-electronic conductor. Electronic transport was attributed to electron-hopping between Pr3+/Pr4+ cations, with Pr4+ cations in the lattice presumably compensated by formation of interstitial oxygen ions. Although oxygen-ionic transport in LnVO4 is often assumed to occur via interstitial oxygen diffusion, there is no firm experimental evidence of this. Another phenomenon characteristic for LnVO4 is protonic transport in wet atmospheres. Again, the mechanism of proton incorporation into zircon-type structure was not studied so far. In the proposed experiment, we would like to collect ND patterns for Pr1-xCaxVO4 (x = 0-0.05), hydrated and anhydrous, to determine the localization of structural defects (oxygen ions/vacancies and protons) and provide an insight on mechanisms of oxygen-ionic and protonic transport in these materials.
DOI: 10.5286/isis.e.rb1920561-1
title: Interstitial oxygen and protons in zircon-type PrVO4-based mixed ionic-electronic conductors

description: Zircon-type PrVO4 was shown recently to be a mixed ionic-electronic conductor. Electronic transport was attributed to electron-hopping between Pr3+/Pr4+ cations, with Pr4+ cations in the lattice presumably compensated by formation of interstitial oxygen ions. Although oxygen-ionic transport in LnVO4 is often assumed to occur via interstitial oxygen diffusion, there is no firm experimental evidence of this. Another phenomenon characteristic for LnVO4 is protonic transport in wet atmospheres. Again, the mechanism of proton incorporation into zircon-type structure was not studied so far. In the proposed experiment, we would like to collect ND patterns for Pr1-xCaxVO4 (x = 0-0.05), hydrated and anhydrous, to determine the localization of structural defects (oxygen ions/vacancies and protons) and provide an insight on mechanisms of oxygen-ionic and protonic transport in these materials.
DOI: 10.5286/isis.e.rb1810316-1
title: Tuning the Luttinger liquid state in copper pyrazine-based spin chain systems

description: The ability to manipulate quantum states of matter is a goal of condensed matter science. Recent progress in molecular magnetism has shown the potential for gaining control over the structural building blocks of materials in order to engineer quantum magnetic properties. Our muon measurements have proven particularly important in demonstrating how such structural variation influences magnetic exchange pathways. Recently we showed how the systematic tuning of the interlayer separation in a two-dimensional molecular system affects its magnetic properties. Using this insight, we now seek to systematically vary the low-dimensional superexchange pathways in a class of tuneable one-dimensional materials in attempt to gain control over the spin Luttinger liquid state. We propose here to determine the ordering temperatures and probe the 1D dynamics of two novel spin chain materials.