cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5286/isis.e.rb2320126
title: Magnetic Excitations of a quantum spin liquid candidate based on a triangulated kagome lattice

description: The two-dimensional (2D) Triangulated Kagome Lattice (TKL) is related to the conventional kagome lattice but with additional ‘triangles within the triangles’. There are several theoretical investigations of this lattice including one which suggests that the triangulated kagome lattice with antiferromagnetic interactions could be the most frustrated lattice yet discovered. The metal organic framework compound, Cu9Cl2(cpa)6·42D2O, is the only known physical realization of this lattice where the magnetic Cu2+ ions have quantum spin=1/2. No long-range magnetic order was observed down to T=0.05K despite a large antiferromagnetic Curie-Weiss temperature of ~250K suggesting strong frustration. In this proposal we request to investigate the magnetic excitations spectrum of this compound.
DOI: 10.5286/isis.e.rb2320126-1
title: Magnetic Excitations of a quantum spin liquid candidate based on a triangulated kagome lattice

description: The two-dimensional (2D) Triangulated Kagome Lattice (TKL) is related to the conventional kagome lattice but with additional ‘triangles within the triangles’. There are several theoretical investigations of this lattice including one which suggests that the triangulated kagome lattice with antiferromagnetic interactions could be the most frustrated lattice yet discovered. The metal organic framework compound, Cu9Cl2(cpa)6·42D2O, is the only known physical realization of this lattice where the magnetic Cu2+ ions have quantum spin=1/2. No long-range magnetic order was observed down to T=0.05K despite a large antiferromagnetic Curie-Weiss temperature of ~250K suggesting strong frustration. In this proposal we request to investigate the magnetic excitations spectrum of this compound.
DOI: 10.5286/isis.e.rb2390077-3
title: Crystal structure of Cd-Zn-Te-Se
DOI: 10.3535/14g-nwf-5rr
title: Poa ankaratrensis A.Camus & H.Perrier

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/dmd-7hx-9vb
title: Thespesia thespesioides (R. Br. ex Benth.) Fryxell

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2320150
title: Disentangling the core/shell nanoparticle magnetization and unraveling the pinning processes at the interface

description: Core/shell magnetic nanoparticle systems (NPs) exhibiting different magnetic orders and the structural mismatch between core and shell will be studied by employing half-polarized small-angle neutron scattering (SANSPOL). The main objective is to unravel the nature of the core/shell interface and magnetic morphology of these complex systems through analysis of the pure nuclear scattering and nuclear magnetic interference term, respectively, and to investigate in detail the magnetic response of these systems with complex architecture for different structural mismatch and different magnetic order between phases. The results of our approach will ultimately uncover the entanglement between the macroscopic response (exchange-bias) and the core/shell structure (magnetic order and structural mismatch). Revealing the correlation of the magnetic order and structure with the exchange-bias coupling is highly important for explaining relaxation effects, technologically relevant for, e.g., magnetic hyperthermia and the magnetic microstructure.
DOI: 10.5286/isis.e.rb2320150-1
title: Disentangling the core/shell nanoparticle magnetization and unraveling the pinning processes at the interface

description: Core/shell magnetic nanoparticle systems (NPs) exhibiting different magnetic orders and the structural mismatch between core and shell will be studied by employing half-polarized small-angle neutron scattering (SANSPOL). The main objective is to unravel the nature of the core/shell interface and magnetic morphology of these complex systems through analysis of the pure nuclear scattering and nuclear magnetic interference term, respectively, and to investigate in detail the magnetic response of these systems with complex architecture for different structural mismatch and different magnetic order between phases. The results of our approach will ultimately uncover the entanglement between the macroscopic response (exchange-bias) and the core/shell structure (magnetic order and structural mismatch). Revealing the correlation of the magnetic order and structure with the exchange-bias coupling is highly important for explaining relaxation effects, technologically relevant for, e.g., magnetic hyperthermia and the magnetic microstructure.
DOI: 10.5286/isis.e.rb2320277-1
title: The Zero-field Magnetic Structures of DyV6Sn6

description: REV6Sn6 (RE = Gd-Tm) are a family of magnetic materials which provide a new opportunity to study the combination of geometrically frustrated magnetism (of the rare earth lattice) with the exotic physics associated with non-magnetic V kagome layers. Our studies focus on DyV6Sn6 in which our preliminary characterisation shows evidence for two magnetic phases below the ordering temperature in zero-field, of which the magnetic structures are unknown. Additionally, it is currently ambiguous as to whether the magnetic interactions are principally antiferromagnetic or ferromagnetic in this material. Neutron diffraction provides the most comprehensive method to establish the magnetic structures and the nature of the magnetic interactions, which are considered essential for the development of a complete understanding of the physics of this important new class of materials.
DOI: 10.3535/3w3-rbm-6cw
title: Hydrangea serratifolia (Hook. & Arn.) F. Phil.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2320243
title: Phase behaviour of THF-water mixtures in nanoscale confinement

description: Understanding the properties of fluids confined to nanometer scale pores is essential to predict and control a wide range of natural and industrial processes. In this proposal we would like to study the phase behaviour of mixtures of tetrahydrofuran (C4H8O, THF) and water in mesoporous silicas with pores of the order 3 - 10nm diameter. At the compositions we would like to study (1:3.3 and 1:17 THF:water) the liquids are miscible at ambient temperature, but sit under a critical point for closed-loop phase separation. By measuring the contrast matching points of liquids to the silica using two different methods (A - individual components matched, B overall mixture only matched) we will be able to confirm and quantify the nature of surface phase separation. We will study two mesoporous silicas: MCM-41 (~3 nm pores) and SBA-15 (~10nm pores). Our hypothesis based on our previous experiment on NIMROD (RB2210033) is that we will see demixing - we are excited to confirm and quantify this effect. We note also that THF-water is a clathrate forming system, and parallel studies are unearthing fascinating confinement effects at lower temperatures.
DOI: 10.5286/isis.e.rb2320243-1
title: Phase behaviour of THF-water mixtures in nanoscale confinement

description: Understanding the properties of fluids confined to nanometer scale pores is essential to predict and control a wide range of natural and industrial processes. In this proposal we would like to study the phase behaviour of mixtures of tetrahydrofuran (C4H8O, THF) and water in mesoporous silicas with pores of the order 3 - 10nm diameter. At the compositions we would like to study (1:3.3 and 1:17 THF:water) the liquids are miscible at ambient temperature, but sit under a critical point for closed-loop phase separation. By measuring the contrast matching points of liquids to the silica using two different methods (A - individual components matched, B overall mixture only matched) we will be able to confirm and quantify the nature of surface phase separation. We will study two mesoporous silicas: MCM-41 (~3 nm pores) and SBA-15 (~10nm pores). Our hypothesis based on our previous experiment on NIMROD (RB2210033) is that we will see demixing - we are excited to confirm and quantify this effect. We note also that THF-water is a clathrate forming system, and parallel studies are unearthing fascinating confinement effects at lower temperatures.
DOI: 10.5286/isis.e.rb2320277
title: The Zero-field Magnetic Structures of DyV6Sn6

description: REV6Sn6 (RE = Gd-Tm) are a family of magnetic materials which provide a new opportunity to study the combination of geometrically frustrated magnetism (of the rare earth lattice) with the exotic physics associated with non-magnetic V kagome layers. Our studies focus on DyV6Sn6 in which our preliminary characterisation shows evidence for two magnetic phases below the ordering temperature in zero-field, of which the magnetic structures are unknown. Additionally, it is currently ambiguous as to whether the magnetic interactions are principally antiferromagnetic or ferromagnetic in this material. Neutron diffraction provides the most comprehensive method to establish the magnetic structures and the nature of the magnetic interactions, which are considered essential for the development of a complete understanding of the physics of this important new class of materials.
DOI: 10.3535/7n0-894-769
title: Poa schimperiana Hochst. ex A.Rich.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/8t8-qa7-sbf
title: Gevuina avellana Molina

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2310651
title: Spin dynamics in modified honeycomb α-Li2IrO3

description: The concept of a ‘quantum spin liquid’ (QSL) refers to a system in which strong quantum fluctuations (supported by magnetic frustration) prevent long-range magnetic order from being established, even at absolute zero temperature. This lack of a magnetic ordering signature makes experimental identification of a quantum spin liquid a great challenge. A QSL system exhibits a wealth of exotic phenomena, such as long-range entanglement and fractional spin excitations, which are of fundamental interest but also hold great potential for quantum communications and quantum computation technology. Alkali metal iridates - A2IrO3 (A = Na, Li), has been identified as a candidate QSL material within the framework of the Kitaev model. However, the magnetism in this material class is sensitive to structural distortions and defects. With our recent progress on crystal synthesis, we managed to systematically suppress the magnetic ordering in α-polymorph of Li2IrO3 towards zero temperature. Here, we will focus on the μSR investigation of these modified α-Li2IrO3 samples to convincingly establish their magnetic ground state. Moreover, the role of sample chemistry and disorder on the magnetism of α-Li2IrO3 would be of great importance to the general understanding of potential QSL materials.
DOI: 10.5286/isis.e.rb2310651-1
title: Spin dynamics in modified honeycomb α-Li2IrO3

description: The concept of a ‘quantum spin liquid’ (QSL) refers to a system in which strong quantum fluctuations (supported by magnetic frustration) prevent long-range magnetic order from being established, even at absolute zero temperature. This lack of a magnetic ordering signature makes experimental identification of a quantum spin liquid a great challenge. A QSL system exhibits a wealth of exotic phenomena, such as long-range entanglement and fractional spin excitations, which are of fundamental interest but also hold great potential for quantum communications and quantum computation technology. Alkali metal iridates - A2IrO3 (A = Na, Li), has been identified as a candidate QSL material within the framework of the Kitaev model. However, the magnetism in this material class is sensitive to structural distortions and defects. With our recent progress on crystal synthesis, we managed to systematically suppress the magnetic ordering in α-polymorph of Li2IrO3 towards zero temperature. Here, we will focus on the μSR investigation of these modified α-Li2IrO3 samples to convincingly establish their magnetic ground state. Moreover, the role of sample chemistry and disorder on the magnetism of α-Li2IrO3 would be of great importance to the general understanding of potential QSL materials.
DOI: 10.5286/isis.e.rb2320167-1
title: Influence of solvent quality and dielectric permittivity on the solution properties of poly(ionic liquids)

description: This proposal outlines a study on the influence of solvent quality and dielectric permittivity on the solution properties of poly(ionic liquids). Earlier experiments have shown that in high dielectric constant solvents, poly(ionic liquids) behave similarly to classical polyelectrolytes, and in solvents of low dielectric constant, they behave like neutral polymers. The proposed study aims 1) to establish the scaling of the correlation length and zero-angle scattering intensity with polymer concentration for solutions in THF, were neutral polymer-like behaviour has been observed, and 2) to investigate the combined influence of solvent quality and dielectric permittivity by using two solvents of similar dielectric constant but different solvent quality. The experiments will involve measuring the correlation length and mass per unit length of the chains from SANS measurements combined with viscosity and electrical conductivity measurements. The investigation will yield structural and thermodynamic information on poly(ionic liquids) and resolve the influence of counterion solvation on the dissociation of counterions from the backbone and the resulting changes in chain conformation.
DOI: 10.21233/n3x797
title: Baker Lake Site 3 pollen surface sample dataset

description: Raw data for the Baker Lake Site 3 pollen surface sample dataset submitted to the Neotoma Paleoecology Database. Data is available through the landing page in JSON format. The landing page referenced by the DOI also contains links to publications and a map-based viewer for the dataset. The Neotoma Paleoecology Database maintains a homepage at https://www.neotomadb.org.
DOI: 10.3535/5xq-91l-x7z
title: Poa perrieri A.Camus

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/z6q-p77-qmv
title: Veronica peregrina L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2320167
title: Influence of solvent quality and dielectric permittivity on the solution properties of poly(ionic liquids)

description: This proposal outlines a study on the influence of solvent quality and dielectric permittivity on the solution properties of poly(ionic liquids). Earlier experiments have shown that in high dielectric constant solvents, poly(ionic liquids) behave similarly to classical polyelectrolytes, and in solvents of low dielectric constant, they behave like neutral polymers. The proposed study aims 1) to establish the scaling of the correlation length and zero-angle scattering intensity with polymer concentration for solutions in THF, were neutral polymer-like behaviour has been observed, and 2) to investigate the combined influence of solvent quality and dielectric permittivity by using two solvents of similar dielectric constant but different solvent quality. The experiments will involve measuring the correlation length and mass per unit length of the chains from SANS measurements combined with viscosity and electrical conductivity measurements. The investigation will yield structural and thermodynamic information on poly(ionic liquids) and resolve the influence of counterion solvation on the dissociation of counterions from the backbone and the resulting changes in chain conformation.
DOI: 10.5286/isis.e.rb2320337
title: Magnetic structure of a Pd-doped Honeycomb Kondo Lattice Ce(Pt1-xPdx)6Al3

description: Recently the Honeycomb lattice has attracted considerable attraction due to the bond dependent exchange interactions according to the Kitaev model, resulting in a quantum spin-liquid ground state previously identified in -RuCl3. We have synthesised a new Ce-based Honeycomb lattice compound CePt6Al3, which exhibits heavy-fermion behaviour and no clear sign of long-range magnetic ordering down to 0.05 K. At low temperatures the resistivity exhibits T2 behaviour without showing any anomaly down to 0.05 K. The heat capacity (C/T) exhibits a broad maximum of 0.5 J/K2 mol at around 0.55 K. The ground state appears to be a heavy-fermion state where the Kondo effect and frustration cooperatively prevent the Ce magnetic moments in the honeycomb lattice from long-range ordering. Interestingly, the heat capacity of Ce(Pt1-xPdx)6Al3 with x = 0.1-0.3 exhibits a λ-type peak between 2 and 3 K indicating a long-range magnetic ordering, which is confirmed by our muon spin rotation measurements. We therefore propose to investigate the magnetic structure of Ce(Pt1-xPdx)6Al3 with x=0.1 and 0.3 using the high flux WISH diffractometer.
DOI: 10.5286/isis.e.rb2320337-1
title: Magnetic structure of a Pd-doped Honeycomb Kondo Lattice Ce(Pt1-xPdx)6Al3

description: Recently the Honeycomb lattice has attracted considerable attraction due to the bond dependent exchange interactions according to the Kitaev model, resulting in a quantum spin-liquid ground state previously identified in -RuCl3. We have synthesised a new Ce-based Honeycomb lattice compound CePt6Al3, which exhibits heavy-fermion behaviour and no clear sign of long-range magnetic ordering down to 0.05 K. At low temperatures the resistivity exhibits T2 behaviour without showing any anomaly down to 0.05 K. The heat capacity (C/T) exhibits a broad maximum of 0.5 J/K2 mol at around 0.55 K. The ground state appears to be a heavy-fermion state where the Kondo effect and frustration cooperatively prevent the Ce magnetic moments in the honeycomb lattice from long-range ordering. Interestingly, the heat capacity of Ce(Pt1-xPdx)6Al3 with x = 0.1-0.3 exhibits a λ-type peak between 2 and 3 K indicating a long-range magnetic ordering, which is confirmed by our muon spin rotation measurements. We therefore propose to investigate the magnetic structure of Ce(Pt1-xPdx)6Al3 with x=0.1 and 0.3 using the high flux WISH diffractometer.
DOI: 10.3535/dw8-7r7-yat
title: Dactylorhiza maculata subsp. fuchsii (Druce) Hyl.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220246-1
title: Temperature evolution of the magnetic structure of the topological kagome magnet TbMn6Sn6
DOI: 10.5286/isis.e.rb2255015
title: How do biocides interact with bacterial membranes to disinfect?
DOI: 10.5286/isis.e.rb2255015-1
title: How do biocides interact with bacterial membranes to disinfect?
DOI: 10.3535/v1e-60x-fvg
title: Dactylorhiza maculata subsp. fuchsii (Druce) Hyl.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/w6j-wwz-feg
title: Nymphaea alba L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220246
title: Temperature evolution of the magnetic structure of the topological kagome magnet TbMn6Sn6
DOI: 10.5286/isis.e.rb2310255
title: In situ observation of the pressure-induced amorphization of siliceous faujasite.

description: Zeolites are formed from rigid tetrahedral aluminosilicate units corner-linked to form rings which are in turn fully corner-linked to form larger units, resulting in open structures with large pores and often cavities. When subjected to pressure, zeolites can undergo pressure-induced amorphization and the resulting amorphous form has a structure and physical properties that are different from amorphous forms (often glasses) produced more conventional routes. It is the aim of this experiment to evaluate the changes in zeolite structure (i.e., the progressive loss of long-range order) up and to the point of amorphization at pressures of 2.2 GPa. This in situ experiment will use a completely siliceous zeolite, which lacks aluminium and charge balancing cations and is also water-free. High pressure neutron diffraction data will be collected in two geometries, transverse detector banks will be used to collect data to high values of scattering vector, which will be used to monitor the progressive collapse of the zeolite while low Q data will be collected using longitudal banks to determine the topology and porosity retention in the high-pressure amorphous form.
DOI: 10.5286/isis.e.rb2310255-3
title: In situ observation of the pressure-induced amorphization of siliceous faujasite.

description: Zeolites are formed from rigid tetrahedral aluminosilicate units corner-linked to form rings which are in turn fully corner-linked to form larger units, resulting in open structures with large pores and often cavities. When subjected to pressure, zeolites can undergo pressure-induced amorphization and the resulting amorphous form has a structure and physical properties that are different from amorphous forms (often glasses) produced more conventional routes. It is the aim of this experiment to evaluate the changes in zeolite structure (i.e., the progressive loss of long-range order) up and to the point of amorphization at pressures of 2.2 GPa. This in situ experiment will use a completely siliceous zeolite, which lacks aluminium and charge balancing cations and is also water-free. High pressure neutron diffraction data will be collected in two geometries, transverse detector banks will be used to collect data to high values of scattering vector, which will be used to monitor the progressive collapse of the zeolite while low Q data will be collected using longitudal banks to determine the topology and porosity retention in the high-pressure amorphous form.
DOI: 10.3535/f9g-vqt-sgy
title: Pilea Lindl.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/hkj-xcr-8z2
title: Lomatia ferruginea (Cav.) R. Br.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220187-1
title: Exploring the formation of ethoxy species in microporous solid-acid catalysts
DOI: 10.5286/isis.e.rb2310407
title: Interfacial Structures of Dye-Sensitized Solar Cell Working Electrodes

description: The transparent and low-cost nature of dye-sensitised solar cells (DSCs) affords them niche prospects for electricity-generating windows in buildings for energy-sustainable future cities. Despite their vast industrial potential, innovation is being held up by a lack of suitable dyes. Better dyes can only be realised if we can better understand how the dye...TiO2 interface of a working electrode in a DSC functions at the molecular level. To this end, we propose to exploit neutron contrast matching through selective deuteration to study the interfacial structure (dye adsorption modes, interdye separation and dye/TiO2 tilt angles) of self-assembled dyes on TiO2 surfaces to uncover the structural origin of the photovoltaic enhancement of the associated device. We will study five dye...TiO2 working electrodes, where the dye is one of five commercially-used Ru-basedorganometallic complexes.