cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5286/isis.e.rb2220637-2
title: Investigating the fate of atmospherically relevant organosulfate monolayers at the air-water interface

description: The proposal will use neutron reflectometry to investigate the oxidation of atmospherically relevant organosulfate films at the air-water interface by gaseous ozone. Organosulfate compounds constitute a large fraction of aerosol organic material and there is a significant lack of understanding regarding their transformation and fate in the atmosphere. Such compounds are surface active and can influence cloud droplet formation thus impacting the climate. The goal is to determine the oxidation kinetics of organosulfate films and to determine if any material remains at the air-water interface. Additionally, the influence of the chemical structure of the starting material (number of double bonds) on the oxidation kinetics will be determined. Overall, the study will inform on the fate of atmospherically relevant organosulfates to oxidation by gaseous ozone.
DOI: 10.3535/ebc-ghd-gjx
title: Scabiosa canescens Waldst. & Kit.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/ret-fdv-xag
title: Scabiosa ochroleuca L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220465-1
title: Investigation of the competitive adsorption of monoclonal antibodies and non-ionic surfactant at the liquid-siliconized solid interface

description: We aim to gain insight into the competitive adsorption behavior of monoclonal antibodies (mAbs) and a non-ionic surfactant (Poloxamer 188) at a liquid-hydrophobic solid interface. This is representative of interfaces that mAbs will encounter during pharmaceutical formulation, transport, and storage. Upon adsorption and desorption at interfaces, mAbs can irreversibly aggregate, reducing drug efficacy and shelf-life. The understanding of mAb stability is still elusive. Here, we plan to utilize neutron reflectometry to understand the adsorption behavior of mAbs with different long-term stabilities, to probe the ability of a Poloxamer 188 to shield a hydrophobic interface from mAbs, and to gain insight into the effect of order of addition of each component. This experiment will have a high industrial impact, and may be able to assist in the optimization of new therapeutic formulations.
DOI: 10.5286/isis.e.rb2310650
title: Tuning the Nano Structures of Micellar Aggregates through a New Group of Surfactants (Aduxols), as Studied by Small Angle Neutron Scattering
DOI: 10.5286/isis.e.rb2310650-1
title: Tuning the Nano Structures of Micellar Aggregates through a New Group of Surfactants (Aduxols), as Studied by Small Angle Neutron Scattering
DOI: 10.3535/238-ha9-vex
title: Scabiosa canescens Waldst. & Kit.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220465
title: Investigation of the competitive adsorption of monoclonal antibodies and non-ionic surfactant at the liquid-siliconized solid interface

description: We aim to gain insight into the competitive adsorption behavior of monoclonal antibodies (mAbs) and a non-ionic surfactant (Poloxamer 188) at a liquid-hydrophobic solid interface. This is representative of interfaces that mAbs will encounter during pharmaceutical formulation, transport, and storage. Upon adsorption and desorption at interfaces, mAbs can irreversibly aggregate, reducing drug efficacy and shelf-life. The understanding of mAb stability is still elusive. Here, we plan to utilize neutron reflectometry to understand the adsorption behavior of mAbs with different long-term stabilities, to probe the ability of a Poloxamer 188 to shield a hydrophobic interface from mAbs, and to gain insight into the effect of order of addition of each component. This experiment will have a high industrial impact, and may be able to assist in the optimization of new therapeutic formulations.
DOI: 10.5286/isis.e.rb2310039
title: Neutron reflectometry study of birch glucuronoxylan at the oil-water interface
DOI: 10.5286/isis.e.rb2310039-1
title: Neutron reflectometry study of birch glucuronoxylan at the oil-water interface
DOI: 10.3535/b0x-3wp-q6h
title: Scabiosa canescens Waldst. & Kit.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/k2c-qyw-q9y
title: Portulaca wightiana Wall.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220347-1
title: Spectrum of new 3-dimensional Quantum Magnet formed from triangular and hexagonal units

description: Quantum magnets formed from spin-1/2 ions, show a range of exotic phenomena such as quantum critical scaling and spinon excitations as found in one-dimensional antiferromagnets, gapped excitations due to spin pairing in dimerized magnets and coherently fluctuating ground states as in frustrated quantum spin liquids. Here we wish to investigate the magnetic properties of a unique cubic quantum magnet Cu3WO6, which consists of a three-dimensional arrangement or hexagons coupled by triangles and which does not develop long-range magnetic order even down to lowest temperatures.
DOI: 10.5286/isis.e.rb2220643
title: Exchange interactions and spin-electric effects in a Cobalt(II)-based antiferromagnetic triangle

description: Magnetic molecules with a doublet S=1/2 ground state are promising candidates as spin-based qubits. The ability of manipulating spin qubits with an electric field (spin-electric effect) promises to achieve faster, more compact and energetically efficient devices for quantum information. We have synthesised and characterized a Co(II)-based molecular antiferromagnetic triangle (Co3P) which shows a significant spin-electric effect. The interplay between exchange, spin-orbit interaction and chirality are at the origin of this phenomena. To disentangle the different contributions a more in-depth characterization of the exchange and magnetic anisotropy of this triangular molecule is required. Here we propose to perform 4D-INS experiments on LET on a single crystals of CoP3 to map out the intra-triangle exchange and anisotropies by a detailed analysis of the Q-dependence of the excitations.
DOI: 10.5286/isis.e.rb2220643-1
title: Exchange interactions and spin-electric effects in a Cobalt(II)-based antiferromagnetic triangle

description: Magnetic molecules with a doublet S=1/2 ground state are promising candidates as spin-based qubits. The ability of manipulating spin qubits with an electric field (spin-electric effect) promises to achieve faster, more compact and energetically efficient devices for quantum information. We have synthesised and characterized a Co(II)-based molecular antiferromagnetic triangle (Co3P) which shows a significant spin-electric effect. The interplay between exchange, spin-orbit interaction and chirality are at the origin of this phenomena. To disentangle the different contributions a more in-depth characterization of the exchange and magnetic anisotropy of this triangular molecule is required. Here we propose to perform 4D-INS experiments on LET on a single crystals of CoP3 to map out the intra-triangle exchange and anisotropies by a detailed analysis of the Q-dependence of the excitations.
DOI: 10.3535/2qp-6jt-sd9
title: Scabiosa canescens Waldst. & Kit.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/jay-6hl-ajn
title: Arnoseris minima (L.) Schweigg. & Körte

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2200010-2
title: Impact of Li and mechanics on polymer dynamics in perfluoropolyether based polymers

description: Lithium metal based batteries are next-generation energy storage devices. A major challenge to industrial application of these batteries is uneven Li deposition on anode which results in dendritic growth and poor coulombic efficiency (CE). We recently reported that perfluoropolyether polymer networks with evenly spaced H-bonding sites of various mechanical strengths are useful as coatings on Li anode surface and batteries prepared with coated polymers with a weaker mechanical strength (i.e. better flowability) exhibit higher CE. We now plan to probe the polymer dynamics using QENS experiment correlate that with the measured viscosity, mechanics and ionic conductivity at room temperature. We believe that this will help us to understand the charge transport mechanism in this new material.
DOI: 10.5286/isis.e.rb2220347
title: Spectrum of new 3-dimensional Quantum Magnet formed from triangular and hexagonal units

description: Quantum magnets formed from spin-1/2 ions, show a range of exotic phenomena such as quantum critical scaling and spinon excitations as found in one-dimensional antiferromagnets, gapped excitations due to spin pairing in dimerized magnets and coherently fluctuating ground states as in frustrated quantum spin liquids. Here we wish to investigate the magnetic properties of a unique cubic quantum magnet Cu3WO6, which consists of a three-dimensional arrangement or hexagons coupled by triangles and which does not develop long-range magnetic order even down to lowest temperatures.
DOI: 10.5286/isis.e.rb2220404
title: Understanding the Integrity of Gram negative Bacterial Membranes in the Extracellular Space in Leaves.

description: The extracellular space in leaves is a battleground for plant-pathogen interactions. Studies on a metal hyperaccumulator plant N. caerulescens and the plant pathogen P. syringae, we observed that zinc conferred protection against infection, although the molecular mechanism for this is not understood. The cation-binding ability of lipopolysaccharides is one of the key determinants of bacterial outer membrane (OM) permeability and Mg2+ plays an important role in OM stability. We hypothesize that hyperaccumlated metals confer protection to plants by binding to the cation binding sites on the outer membrane causing disruption. Using floating models of the Gram negative bacterial outer membrane we aim to model this effect, examining the structure of the model membranes in the presence of Mg2+ and Zn2+ and the competition between these two cations for the membrane binding sites.
DOI: 10.5286/isis.e.rb2220404-2
title: Understanding the Integrity of Gram negative Bacterial Membranes in the Extracellular Space in Leaves.

description: The extracellular space in leaves is a battleground for plant-pathogen interactions. Studies on a metal hyperaccumulator plant N. caerulescens and the plant pathogen P. syringae, we observed that zinc conferred protection against infection, although the molecular mechanism for this is not understood. The cation-binding ability of lipopolysaccharides is one of the key determinants of bacterial outer membrane (OM) permeability and Mg2+ plays an important role in OM stability. We hypothesize that hyperaccumlated metals confer protection to plants by binding to the cation binding sites on the outer membrane causing disruption. Using floating models of the Gram negative bacterial outer membrane we aim to model this effect, examining the structure of the model membranes in the presence of Mg2+ and Zn2+ and the competition between these two cations for the membrane binding sites.
DOI: 10.3535/ae4-mkl-8g5
title: Portulaca wightiana Wall.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220680
title: Search for Kitaev interactions and vortex spin dynamics in a spin-orbit coupled triangular magnet

description: We propose to explore the spin dynamics of a hexagonal magnet with Co2+ ions with spin-orbit entangled J_eff=1/2 magnetic moments where bond-dependent anisotropic (Kitaev) interactions are expected, but so far evidence for such interactions has only been found in honeycomb structures for Ru3+ and Ir4+ ions. We have recently characterized the magnetic phase diagram of hexagonal Na2BaCoP2O8 via neutron diffraction and observed a surprising phase in applied field with q-vector moving along the zone boundary upon varying field, which may be related to the so-called vortex crystal phase expected to be stabilized when sub-leading ferromagnetic Kitaev interactions accompany antiferromagnetic Heisenberg exchange. Here we propose to study the spin dynamics as a function of applied field and search for specific signatures of Kitaev interactions and vortex physics in single crystals.
DOI: 10.5286/isis.e.rb2220680-1
title: Search for Kitaev interactions and vortex spin dynamics in a spin-orbit coupled triangular magnet

description: We propose to explore the spin dynamics of a hexagonal magnet with Co2+ ions with spin-orbit entangled J_eff=1/2 magnetic moments where bond-dependent anisotropic (Kitaev) interactions are expected, but so far evidence for such interactions has only been found in honeycomb structures for Ru3+ and Ir4+ ions. We have recently characterized the magnetic phase diagram of hexagonal Na2BaCoP2O8 via neutron diffraction and observed a surprising phase in applied field with q-vector moving along the zone boundary upon varying field, which may be related to the so-called vortex crystal phase expected to be stabilized when sub-leading ferromagnetic Kitaev interactions accompany antiferromagnetic Heisenberg exchange. Here we propose to study the spin dynamics as a function of applied field and search for specific signatures of Kitaev interactions and vortex physics in single crystals.
DOI: 10.3535/8xe-wt4-0am
title: Portulaca commutata M. G. Gilbert

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/rvf-v4w-rsa
title: Scabiosa canescens Waldst. & Kit.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220094-1
title: Solution Structures in Mixtures of an Oleo-furan Sulfonate with Anionic and Nonionic Surfactants

description: Anionic surfactants such as linear alkylbenzene sulfonate (LAS) and sodium dodecyl sulfate (SDS) are the most used and best characterised commercial surfactants used in detergent products but involve the use of petrochemicals or expensive oil feedstocks in their synthesis, making them an unsustainable option for the future. This has led to a move towards biobased and renewable surfactants, such as the oleo-furan sulfonates, however the physico chemical properties of these surfactants have not yet been studied. We aim to study the structures formed by a C14-tail oleo-furan sulfonate surfactant in binary and ternary mixed surfactant micelles with typical nonionic and anionic surfactants in dilute solutions, in order to link surfactant structures, micelle composition, aggregate morphology and properties such as emulsification, cleaning and foaming abilities.
DOI: 10.5286/isis.e.rb2310475
title: Can the size of dye aggregates within polymer brushes be determined with GISANS?
DOI: 10.5286/isis.e.rb2310475-1
title: Can the size of dye aggregates within polymer brushes be determined with GISANS?
DOI: 10.3535/0s8-6c2-4al
title: Stellaria glochidisperma (Murb.) Freyn

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/glq-gh7-4fp
title: Scabiosa canescens Waldst. & Kit.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220094
title: Solution Structures in Mixtures of an Oleo-furan Sulfonate with Anionic and Nonionic Surfactants

description: Anionic surfactants such as linear alkylbenzene sulfonate (LAS) and sodium dodecyl sulfate (SDS) are the most used and best characterised commercial surfactants used in detergent products but involve the use of petrochemicals or expensive oil feedstocks in their synthesis, making them an unsustainable option for the future. This has led to a move towards biobased and renewable surfactants, such as the oleo-furan sulfonates, however the physico chemical properties of these surfactants have not yet been studied. We aim to study the structures formed by a C14-tail oleo-furan sulfonate surfactant in binary and ternary mixed surfactant micelles with typical nonionic and anionic surfactants in dilute solutions, in order to link surfactant structures, micelle composition, aggregate morphology and properties such as emulsification, cleaning and foaming abilities.
DOI: 10.5286/isis.e.rb2255005
title: Structural studies of hair shampoo formulations: determination of the supramolecular architecture and structure-property relationships of concentrates
DOI: 10.5286/isis.e.rb2255005-1
title: Structural studies of hair shampoo formulations: determination of the supramolecular architecture and structure-property relationships of concentrates
DOI: 10.3535/rw1-j9z-mzp
title: Scabiosa canescens Waldst. & Kit.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/vx0-dz2-mj2
title: Portulaca wightiana Wall.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220344
title: The magnetic structure of FeSe superconductor under pressure

description: Magnetism is in general a key ingredient for high-Tc superconductors because the corresponding spin fluctuations could mediate electronic Cooper pairing. FeSe with a nematic order of 90 K exhibits Neel and stripe spin fluctuations with no magnetic phase transition at ambient pressure. The Tc of FeSe can be dramatically enhanced by hydrostatic pressure, accompanied by the development of a magnetic order above ~ 1.2 GPa. Determining the pressure-induced magnetic structure is thus of particular interest, while neutron diffraction measurements are still lacking due to techinal difficulties. Recent muSR study revealed the static magnetism in Fe(Se,S) at lower pressure of 0.6 GPa, we therefore propose a neutron powder diffraction experiment in the helium pressure cell. Our results will be crucial for elucidating the magnetism and its interplay with nematicity and superconductivity in FeSe.
DOI: 10.5286/isis.e.rb2220344-1
title: The magnetic structure of FeSe superconductor under pressure

description: Magnetism is in general a key ingredient for high-Tc superconductors because the corresponding spin fluctuations could mediate electronic Cooper pairing. FeSe with a nematic order of 90 K exhibits Neel and stripe spin fluctuations with no magnetic phase transition at ambient pressure. The Tc of FeSe can be dramatically enhanced by hydrostatic pressure, accompanied by the development of a magnetic order above ~ 1.2 GPa. Determining the pressure-induced magnetic structure is thus of particular interest, while neutron diffraction measurements are still lacking due to techinal difficulties. Recent muSR study revealed the static magnetism in Fe(Se,S) at lower pressure of 0.6 GPa, we therefore propose a neutron powder diffraction experiment in the helium pressure cell. Our results will be crucial for elucidating the magnetism and its interplay with nematicity and superconductivity in FeSe.
DOI: 10.5286/isis.e.rb2310467
title: A SANS experiment to study nanostructures in contrast matched sunscreen lotions
DOI: 10.5286/isis.e.rb2310467-1
title: A SANS experiment to study nanostructures in contrast matched sunscreen lotions
DOI: 10.3535/hl5-41s-rpz
title: Portulaca wightiana Wall.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220130
title: Agitation-induced growth of uniform anthracene nanotubes

description: We propose a time-resolved SANS experiment to investigate the nanotubes formed by anthracene derivatives in methylcyclohexane. These systems show unique behaviour as without perturbation they slowly form amorphous aggregates, but upon perturbation they follow a far more ordered self-assembly process to yield highly ordered and uniform nanotubes. We aim to observe both self-assembly pathways via SANS to gain some insight into this unusual behaviour and the resulting self-assembly mechanism. SANS2D is essential for this experiment due to the high flux and signal-noise ratio required to study these relatively dilute systems (~0.1 vol%). The large Q-range from the overlapping detectors will allow simultaneous monitoring of morphological changes at low Q and the potential emergence of Bragg peaks at mid-high Q arising from regular spacings within the tubes.
DOI: 10.5286/isis.e.rb2220130-2
title: Agitation-induced growth of uniform anthracene nanotubes

description: We propose a time-resolved SANS experiment to investigate the nanotubes formed by anthracene derivatives in methylcyclohexane. These systems show unique behaviour as without perturbation they slowly form amorphous aggregates, but upon perturbation they follow a far more ordered self-assembly process to yield highly ordered and uniform nanotubes. We aim to observe both self-assembly pathways via SANS to gain some insight into this unusual behaviour and the resulting self-assembly mechanism. SANS2D is essential for this experiment due to the high flux and signal-noise ratio required to study these relatively dilute systems (~0.1 vol%). The large Q-range from the overlapping detectors will allow simultaneous monitoring of morphological changes at low Q and the potential emergence of Bragg peaks at mid-high Q arising from regular spacings within the tubes.
DOI: 10.3535/d8r-ytg-89b
title: Scabiosa canescens Waldst. & Kit.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/qle-kfg-h8h
title: Sparganium × speirocephalum Neuman

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220174-1
title: Long Range Structure and Zwitterion-Ion Interactions in Osmolyte Solutions

description: Cytosol composition not only dictates the osmotic balance of cells with their surroundings, but also determines the the range and nature of inter-protein interactions within the cell. While the role of salt in destabilising proteins is well known, the role that zwitterionic osmolytes play in these interactions is less clear. Here we will study model cytosol solutions of salt-zwitterion mixtures using neutron scattering. Recently we have investigated surface forces present in salt-zwitterion mixtures at an interface, and found periodic structure and long range screening forces that depend on sample composition. This experiment will investigate the occurrence of this structure in the bulk liquid, and its dependence on salt ion species. These results will have significant impact on our understanding of the role of zwitterionic osmolytes in maintaining protein structure and function.
DOI: 10.5286/isis.e.rb2220763
title: Magnetic structure determination of novel monoclinic Kondo lattice YbPt5B2

description: In course of Yb-Pt-B phase diagram studies, novel YbPt5B2 was detected, which crystallises in a monoclinic crystal structure (space group C2/m) with its own YbPt5B2-type. Bulk property measurements reveal two magnetic phase transitions at T_mag1 ~ 8 K and T_mag2 ~ 4 K. For temperatures below T_mag2, increasing magnetic fields cause two successive field induced phase transitions below 3 T. In order to gain insight into the complicated magnetic structure and the respective temperature and field-dependent phase transitions, microscopic insights by neutron studies are indispensable. Magnetic order (magnitude and arrangements of the Yb magnetic moments) is expected to be a result of a complicated overlay of RKKY interaction, Kondo and crystalline electric field effects. We therefore propose neutron diffraction measurements on YbPt5B2 using the WISH diffractometer.