cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5286/isis.e.rb2410449-1
title: Follow the charge: orbital reorganization across the time-reversal symmetry breaking transition in kagome superconductors

description: The newly discovered Kagomè superconductors with formula unit AV3Sb5 (A=K,Rb,Cs alkali metals) offer the chance to study exotic phenomena related to charge density wave (CDW) instabilities and time-reversal symmetry breaking (TRSB) transitions preceding the superconducting phase. 
As of today, a good understanding of the CDW order has been established while the nature of the TRSB transition is yet to be clarified. Moreover, the two phenomena are believed to be closely related, but TRSB revealed by muSR is concomitant or follows the CDW depending on the alkali metal. 
We propose a muon spin spectroscopy experiment to characterize and analyze how electronic charges reorganize across the TRSB transition with the avoided level crossing technique.
DOI: 10.3535/wea-xc2-03q
title: Veronica chamaedrys L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2410449
title: Follow the charge: orbital reorganization across the time-reversal symmetry breaking transition in kagome superconductors

description: The newly discovered Kagomè superconductors with formula unit AV3Sb5 (A=K,Rb,Cs alkali metals) offer the chance to study exotic phenomena related to charge density wave (CDW) instabilities and time-reversal symmetry breaking (TRSB) transitions preceding the superconducting phase. 
As of today, a good understanding of the CDW order has been established while the nature of the TRSB transition is yet to be clarified. Moreover, the two phenomena are believed to be closely related, but TRSB revealed by muSR is concomitant or follows the CDW depending on the alkali metal. 
We propose a muon spin spectroscopy experiment to characterize and analyze how electronic charges reorganize across the TRSB transition with the avoided level crossing technique.
DOI: 10.5286/isis.e.rb2410695
title: Interaction of tunable lipid nanoparticles for drug delivery with model membranes of different fluidity and pH

description: On the basis of the results obtained from the previous proposal (experiment#2220789) we would like to extend the study of the interactions between lipid nanoparticles (cationic and pH sensitive cubosomes) and model membranes with different fluidity and pH. To understand the molecular mechanism underlying the cellular uptake of these ordered lipid nanoparticles is fundamental since provide important hints for fine-tuning drug delivery systems. If on the one hand the membrane fluidity may influence the cellular uptake of nanoparticles on the other the low pH values, such those of the cancer cellular environment, may influence nanoparticles mesophases and hence the particular kind interacticions. Therefore, here we propose to study cationic cubosomes with model membranes in the presence and absence of cholesterol (different fluidity) and pH sensitive cubosomes with the same model membranes but with different pH.
DOI: 10.5286/isis.e.rb2410695-1
title: Interaction of tunable lipid nanoparticles for drug delivery with model membranes of different fluidity and pH

description: On the basis of the results obtained from the previous proposal (experiment#2220789) we would like to extend the study of the interactions between lipid nanoparticles (cationic and pH sensitive cubosomes) and model membranes with different fluidity and pH. To understand the molecular mechanism underlying the cellular uptake of these ordered lipid nanoparticles is fundamental since provide important hints for fine-tuning drug delivery systems. If on the one hand the membrane fluidity may influence the cellular uptake of nanoparticles on the other the low pH values, such those of the cancer cellular environment, may influence nanoparticles mesophases and hence the particular kind interacticions. Therefore, here we propose to study cationic cubosomes with model membranes in the presence and absence of cholesterol (different fluidity) and pH sensitive cubosomes with the same model membranes but with different pH.
DOI: 10.3535/cyw-npc-49b
title: Thymus praecox subsp. polytrichus (A.Kern. ex Borbás) Jalas

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/wa4-pzb-my4
title: Potentilla erecta (L.) Raeusch.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2368035-1
title: QENS study to understand the the dynamics of supercooled water undergoing segmental freezing in nanopores
DOI: 10.5286/isis.e.rb2410130
title: Investigation of Enhanced Ionic Conductivity in La-doped Sr3V2O8

description: Solid oxide ion and proton conductors are important materials with applications in a range of hydrogen-based energy technologies. To make these technologies more economical and durable, it is important to develop new ionic conductors with high conductivities at reduced temperatures (≤ 600 °C). We have recently reported high oxide ion and proton conductivity in palmierite Sr3V2O8. The present study explores the potential of further enhancing its ionic conductivity via targeted chemical doping, specifically by substituting Sr2+ for La3+ to form the solid solution Sr(3-3x)La(2x)V2O8. Preliminary electrical characterization has revealed a two orders of magnitude increase in oxide ion conductivity with La3+ doping. However, an intriguing finding is that proton conductivity is completely suppressed. This suggests the formation of both cation vacancies and interstitial oxygen defects in the doped material. We propose to perform neutron diffraction measurements as function of temperature to verify the presence of oxygen interstitials and understand the doping mechanism brought about by La3+ → Sr2+ substitution and its impact on the significant increase in oxide ion conductivity. This study will be important in providing design rules for the enhancement of the ionic conduction in this new class of conductors.
DOI: 10.5286/isis.e.rb2410130-1
title: Investigation of Enhanced Ionic Conductivity in La-doped Sr3V2O8

description: Solid oxide ion and proton conductors are important materials with applications in a range of hydrogen-based energy technologies. To make these technologies more economical and durable, it is important to develop new ionic conductors with high conductivities at reduced temperatures (≤ 600 °C). We have recently reported high oxide ion and proton conductivity in palmierite Sr3V2O8. The present study explores the potential of further enhancing its ionic conductivity via targeted chemical doping, specifically by substituting Sr2+ for La3+ to form the solid solution Sr(3-3x)La(2x)V2O8. Preliminary electrical characterization has revealed a two orders of magnitude increase in oxide ion conductivity with La3+ doping. However, an intriguing finding is that proton conductivity is completely suppressed. This suggests the formation of both cation vacancies and interstitial oxygen defects in the doped material. We propose to perform neutron diffraction measurements as function of temperature to verify the presence of oxygen interstitials and understand the doping mechanism brought about by La3+ → Sr2+ substitution and its impact on the significant increase in oxide ion conductivity. This study will be important in providing design rules for the enhancement of the ionic conduction in this new class of conductors.
DOI: 10.3535/338-nrb-fy5
title: Poa annua L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/nxt-wa2-ee5
title: Lotus tenuis Waldst. & Kit. ex Willd.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2368035
title: QENS study to understand the the dynamics of supercooled water undergoing segmental freezing in nanopores
DOI: 10.5286/isis.e.rb2410145
title: Solving the magnetic structure of Shastry-Sutherland Model System Tb2Be2GeO7

description: We propose to study the crystal structure of Tb2Be2GeO7 - a rare-earth based Shastry-Sutherland compound - on high-quality single crystal sample. Our previous powder neutron diffraction measurements reveal a magnetically ordered phase transition at low temperatures. We have performed low temperature thermodynamics measurements on single crystal sample of Tb2Be2GeO7 which not only confirm the ordered state at zero field, but indicate the possibility of emergence of super-structure spin states as a function of magnetic field. However our recent single crystal neutron data showed presence of a very week forbidden (1,0,0) peak which is not observed in X-ray SC and neutron powder measurement. Here we propose to study the structure more systematically to confirm the crystal structure.
DOI: 10.5286/isis.e.rb2410145-1
title: Solving the magnetic structure of Shastry-Sutherland Model System Tb2Be2GeO7

description: We propose to study the crystal structure of Tb2Be2GeO7 - a rare-earth based Shastry-Sutherland compound - on high-quality single crystal sample. Our previous powder neutron diffraction measurements reveal a magnetically ordered phase transition at low temperatures. We have performed low temperature thermodynamics measurements on single crystal sample of Tb2Be2GeO7 which not only confirm the ordered state at zero field, but indicate the possibility of emergence of super-structure spin states as a function of magnetic field. However our recent single crystal neutron data showed presence of a very week forbidden (1,0,0) peak which is not observed in X-ray SC and neutron powder measurement. Here we propose to study the structure more systematically to confirm the crystal structure.
DOI: 10.3535/g8w-j19-27r
title: Beta vulgaris L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/x9q-76c-any
title: Viola L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2310144-1
title: Origin of Glassy Thermal Conductivity in Cs3Bi2I6Cl3 Single Crystal: An Inelastic Neutron Scattering Study

description: Crystalline materials which exhibit unusual glass-like temperature variations of lattice thermal conductivity (κL) are essential in terms of their application in thermoelectrics. But it was a great challenge to observe glass-like thermal conductivity in a single crystal without the presence of impurity and disorder. Finding the origin behind the glassy thermal conductivity in a single crystal would not only be fascinating from the viewpoint of chemical bonding and lattice dynamics but would have great technological importance. Recently we have demonstrated an ultralow (~0.20 W/m·K at room temperature) and glass-like temperature dependence (2–400 K) of κL in a single crystal of layered halide perovskite, Cs3Bi2I6Cl3. We now propose to investigate this unusual phonon properties observed in Cs3Bi2I6Cl3 in more detail, to validate our first-principles calculations and to study the phonon mode-specific damping as a function of temperature in Cs3Bi2I6Cl3 using inelastic neutron scattering.
DOI: 10.5286/isis.e.rb2410262
title: Exploring the two-dome superconductivity of 2D Kagome CsV3Sb5-xSnx superconductor and its relation with charge density wave and time reversal symmetry breaking phases

description: We propose a muon spin spectroscopy investigation of the two-dome superconducting behaviour of the newly discovered CsV3Sb5 two-dimensional Kagome compound as a function of the doping driven by the Sn/Sb heterovalent partial substitution. Transverse field measurements will be used to investigate the superconducting gap nature and to measure the London penetration depth evolution with doping. Zero field measurements will be performed to study the possible presence of time-reversal symmetry breaking in both the superconducting and the normal state induced by the doping. This study is expected to give significant experimental outcomes to understand the exotic and rich quantum behaviour arising from the 2D Kagome lattice.
DOI: 10.5286/isis.e.rb2410262-1
title: Exploring the two-dome superconductivity of 2D Kagome CsV3Sb5-xSnx superconductor and its relation with charge density wave and time reversal symmetry breaking phases

description: We propose a muon spin spectroscopy investigation of the two-dome superconducting behaviour of the newly discovered CsV3Sb5 two-dimensional Kagome compound as a function of the doping driven by the Sn/Sb heterovalent partial substitution. Transverse field measurements will be used to investigate the superconducting gap nature and to measure the London penetration depth evolution with doping. Zero field measurements will be performed to study the possible presence of time-reversal symmetry breaking in both the superconducting and the normal state induced by the doping. This study is expected to give significant experimental outcomes to understand the exotic and rich quantum behaviour arising from the 2D Kagome lattice.
DOI: 10.3535/eda-1xb-qb1
title: Festuca rubra L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2410084-2
title: Neutron Diffraction Studies of Metal-Organic Frameworks for Ammonia Adsorption

description: Porous metal-organic frameworks (MOFs) are gaining increasing attention due to their recently commercialised application in gas adsorption. There is a strong interest in ammonia adsorption owing to the high volumetric and gravimetric hydrogen energy density of ammonia. We seek to develop MOF materials with exceptional ammonia capacity and request 4 days on WISH to study the preferred binding sites and orientation of adsorbed ND3 molecules in the MOFs. This proposed study will investigate the precise locations of ND3 and CO2 molecules within two robust MOFs, namely Al-BTA-1 and Al-BTA-2. These MOFs exhibit exceptionally high capacity for ammonia at extremely low concentration with repeatable cycles, representing the best-performing materials to date. The high resolution, low background and large d-spacing capabilities of WISH will enable structural insight to study the precise locations and preferred orientation of ND3 molecules. The proposed study aims to reveal the change in host-guest interaction with respect to different surface coverage.
DOI: 10.5286/isis.e.rb2467003
title: Coupling particle ordering and spherulite growth in mixed molecular weight poly(ethylene oxide) solid state electrolytes

description: The transition to a carbon neutral society is dependent on the growing use of renewable electrical energy, made possible by electrochemical energy storage devices, such as batteries. Currently most of these needs are met by Lithium-ion batteries (LIBs), however, decades of optimization have resulted in plateauing LIB performances with restrictions on charge rate, energy density and power. Solid state electrolytes (SSE) with high ion conductivity solve the issue of flammability and can mitigate dendrite growth, permitting greater energy density devices with less restricted operating conditions. Organic solid electrolytes based on polymers such as poly(ethylene oxide) (PEO) have a high donor number for Li ions and are spaced at a favourable distance to promote ion hopping, achieve suitable electrode contact and benefit from simple processability. We have recently revealed significant conductivity optimisation of PEO based SSE by mixing select molecular weight (MW) PEO with desired ratio, evidenced by spherulite morphology. Investigation of these structures across the nano- to macro- scale is required to inform preparation parameters for PEO based SSE.
DOI: 10.5286/isis.e.rb2467003-1
title: Coupling particle ordering and spherulite growth in mixed molecular weight poly(ethylene oxide) solid state electrolytes

description: The transition to a carbon neutral society is dependent on the growing use of renewable electrical energy, made possible by electrochemical energy storage devices, such as batteries. Currently most of these needs are met by Lithium-ion batteries (LIBs), however, decades of optimization have resulted in plateauing LIB performances with restrictions on charge rate, energy density and power. Solid state electrolytes (SSE) with high ion conductivity solve the issue of flammability and can mitigate dendrite growth, permitting greater energy density devices with less restricted operating conditions. Organic solid electrolytes based on polymers such as poly(ethylene oxide) (PEO) have a high donor number for Li ions and are spaced at a favourable distance to promote ion hopping, achieve suitable electrode contact and benefit from simple processability. We have recently revealed significant conductivity optimisation of PEO based SSE by mixing select molecular weight (MW) PEO with desired ratio, evidenced by spherulite morphology. Investigation of these structures across the nano- to macro- scale is required to inform preparation parameters for PEO based SSE.
DOI: 10.3535/993-6sd-lwa
title: Carex arenaria L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/xym-x6n-c8c
title: Carex pulicaris L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220008
title: Structure and properties of phenol-ammonia compounds

description: In previous work carried out on HRPD (RB1920009) I made a preliminary characterisation of four new compounds in the binary system phenol-ammonia, including one that exists in two distinct modifications. The structure of one of these, phenol mono-ammoniate, was determined from the powder data. The remaining phases were indexed and space-groups assigned, but the structures could not be determined. With improved knowledge of the phases that exist in this system, and with a new CCR centre stick that allows us to reduce the effects of preferred orientation, my aim is to collect new data from the phenol ammoniates in order to complete the task of structure solution. DFT work on the solved mono-ammoniate structure already reveals a propensity for proton transfer at low pressures, and it is hoped that the more ammonia-rich compounds will exhibit this characteristic perhaps at ambient pressure.
DOI: 10.5286/isis.e.rb2220008-1
title: Structure and properties of phenol-ammonia compounds

description: In previous work carried out on HRPD (RB1920009) I made a preliminary characterisation of four new compounds in the binary system phenol-ammonia, including one that exists in two distinct modifications. The structure of one of these, phenol mono-ammoniate, was determined from the powder data. The remaining phases were indexed and space-groups assigned, but the structures could not be determined. With improved knowledge of the phases that exist in this system, and with a new CCR centre stick that allows us to reduce the effects of preferred orientation, my aim is to collect new data from the phenol ammoniates in order to complete the task of structure solution. DFT work on the solved mono-ammoniate structure already reveals a propensity for proton transfer at low pressures, and it is hoped that the more ammonia-rich compounds will exhibit this characteristic perhaps at ambient pressure.
DOI: 10.5286/isis.e.rb2410084
title: Neutron Diffraction Studies of Metal-Organic Frameworks for Ammonia Adsorption

description: Porous metal-organic frameworks (MOFs) are gaining increasing attention due to their recently commercialised application in gas adsorption. There is a strong interest in ammonia adsorption owing to the high volumetric and gravimetric hydrogen energy density of ammonia. We seek to develop MOF materials with exceptional ammonia capacity and request 4 days on WISH to study the preferred binding sites and orientation of adsorbed ND3 molecules in the MOFs. This proposed study will investigate the precise locations of ND3 and CO2 molecules within two robust MOFs, namely Al-BTA-1 and Al-BTA-2. These MOFs exhibit exceptionally high capacity for ammonia at extremely low concentration with repeatable cycles, representing the best-performing materials to date. The high resolution, low background and large d-spacing capabilities of WISH will enable structural insight to study the precise locations and preferred orientation of ND3 molecules. The proposed study aims to reveal the change in host-guest interaction with respect to different surface coverage.
DOI: 10.3535/y0j-h7z-1y7
title: Rubus saxatilis L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/z35-x3s-d7k
title: Viola canina L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2310001-1
title: Residual stress mapping in high yttria thermally sprayed zirconium oxide coatings

description: Need for high thermal efficiency in aero and land-based turbine engines push the envelope for low conductivity and high strength thermal barrier coatings (TBC’s). Prominent approach towards achieving this is through high yttria content in zirconia to stabilize zirconia . High yttria content degrades the thermal shock resistance of the TBC system. The project therefore aims to explore the residual stress profile of 8YSZ (as sprayed) and 20YSZ (in as sprayed and thermal shock conditions). Mapping residual stresses will provide qualitative information on the thermal shock life of the TBC system thereby eliminating the need of expensive and time-consuming thermal shock studies on all the possible chemistries. Due to the heavy lattice distortion unleashed by the high atomic number rare earth elements, it is expected that neutron diffraction would be able to predict the residual stress and quantify the thermal shock. Neutron diffraction residual strain analysis is expected to expedite the selection of the best composition that would suit both the requirements of thermal shock resistance as well as low thermal conductivity. Reduced tensile residual stress are known to be beneficial to the fatigue life of coatings leading to enhanced thermal cycling behavior – which demonstrates wider impact of this investigation.
DOI: 10.5286/isis.e.rb2410229
title: Exploring neutron Orbital Angular Momentum (OAM) as a future probe of topological materials

description: It has been known for some time that light can carry orbital angular momentum (OAM) in addition to the more familiar spin angular momentum that is manifested in the polarization of the light wave. Optical OAM expands the arsenal of tools available to explore matter though light-matter interactions. More recently, experiments have demonstrated x-ray OAM and there are indications that beams of quantum particles with non-zero mass (such as neutrons) may also exhibit this phenomenon. We plan to measure neutron scattering from forked diffraction gratings, made using electron-beam lithography by our collaborators at the Center for Nanophase Materials Science at Oak Ridge Lab. Gratings of this type have been shown to produce "vortex light" (i.e. waves with specific values of OAM) when exposed to electromagnetic radiation. Our experiment will be a first step in exploring whether neutron OAM can be added to the neutron scattering toolbox to probe materials and, in particular, to characterize topological structures such as skyrmions that have been proposed for next generation electronic components.