cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5286/isis.e.rb2210323-1
title: Laue Diffraction of Single-crystalline Graphite Intercalation Compounds

description: We propose to use neutron scattering to study the crystal structures of a group of intercalated layered materials, i.e. graphite intercalation compounds (GIC). Via a task-specific synthesis approach, these GIC crystals show high single crystallinity and interesting quantum phenomena (i.e. monolayer-behaving bulk materials with superlattice modulation). Of particular note is that the intercalants are made of light elements, making neutron scattering the most suitable tool for studying their spatial ordering, whereas X-ray diffraction techniques are not as capable of fully resolving the lattice formed by the light elements. The neutron scattering results are critical to understanding the observed quantum phenomena by computational methods. We expect that the results from the this study could provide new insights on synthesizing and understanding monolayer-behaving bulk materials.
DOI: 10.3535/hav-fbe-zxm
title: Centaurea scabiosa subsp. scabiosa

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/hlj-q67-xbq
title: Erigeron annuus (L.) Pers.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2210099
title: Can understanding the relationship between sunscreen lotions\2019 microstructure and the SPF help prevent malignant melanoma?

description: Sunscreen emulsions such lotions or creams are arguably the most popular products used to protect the skin against harmful UV radiation. Several studies have been conducted to untangle their internal microstructure. However, our understanding of the direct effect of UV filters and other materials such as preservatives on the internal architecture and the feel of these lotions is unfortunately lacking. In this experiment, we would like to use contrast variation SANS to take a better look at this internal architecture in the presence of a range UVA/UVB filters and preservatives. A major outcome of this ongoing work is to act as an informative tool for formulators, where sun protection products would be formulated based on a scientific approach rather than semi-empirical approaches.
DOI: 10.5286/isis.e.rb2210099-1
title: Can understanding the relationship between sunscreen lotions\2019 microstructure and the SPF help prevent malignant melanoma?

description: Sunscreen emulsions such lotions or creams are arguably the most popular products used to protect the skin against harmful UV radiation. Several studies have been conducted to untangle their internal microstructure. However, our understanding of the direct effect of UV filters and other materials such as preservatives on the internal architecture and the feel of these lotions is unfortunately lacking. In this experiment, we would like to use contrast variation SANS to take a better look at this internal architecture in the presence of a range UVA/UVB filters and preservatives. A major outcome of this ongoing work is to act as an informative tool for formulators, where sun protection products would be formulated based on a scientific approach rather than semi-empirical approaches.
DOI: 10.5286/isis.e.rb2210311-1
title: Neutron diffraction study on the unusual step-like phase transition in Tb-Y alloy with long-period helix antiferromagnetic structure

description: Recently, we found a step-like magnetization curve for Tb-0.3Y below 5 K. The sample show helix antiferromagnetic at ground state, but jumps at critical magnetic field of 1.5T, 2.1T, 2.8T, 3.0T, and 4.0T with gradually decreased intervals in the virgin M-H curve, and finally transforms to ferromagnetic state with stronger field. Such as step-like phase transition has rarely been reported, which may represent a new type of physical mechanism of phase transition. In this proposal, we aim to carry magnetic field-resolved neutron diffraction experiment at WISH to uncover the mystery.
DOI: 10.3535/4hp-fqt-x6r
title: Geum rivale L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/d3t-ad4-nky
title: Dianthus superbus subsp. superbus

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2210205-1
title: Phonon dispersion in the superionic Ag8SnSe6 sample with ultralow lattice thermal conductivity

description: Materials with superionic behavior are a group of novel thermoelectric candidates with excellent thermoelectric performance due to their ultralow lattice thermal conductivity. In the past five years, the study of the underlying mechanism for the ultralow lattice thermal conductivity has been a hot topic in the thermoelectric community. However, there still exist large controversies about the explanation, which is caused mainly by the lack of a large single crystal for phonon studies. Here, we have got a large Ag8SnSe6 single crystal with superionic behavior. We plan to use the LET cold neutron spectrometer to map the phonon dispersions as a function of temperature. From this experiment, we expect to find the anomalies in the phonon dispersions as well as the phonon lifetimes, hence giving a thorough understanding of the ultralow lattice thermal conductivity in superionic materials.
DOI: 10.5286/isis.e.rb2210311
title: Neutron diffraction study on the unusual step-like phase transition in Tb-Y alloy with long-period helix antiferromagnetic structure

description: Recently, we found a step-like magnetization curve for Tb-0.3Y below 5 K. The sample show helix antiferromagnetic at ground state, but jumps at critical magnetic field of 1.5T, 2.1T, 2.8T, 3.0T, and 4.0T with gradually decreased intervals in the virgin M-H curve, and finally transforms to ferromagnetic state with stronger field. Such as step-like phase transition has rarely been reported, which may represent a new type of physical mechanism of phase transition. In this proposal, we aim to carry magnetic field-resolved neutron diffraction experiment at WISH to uncover the mystery.
DOI: 10.3535/wje-ee2-7gb
title: Koeleria pyramidata subsp. pyramidata

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2210205
title: Phonon dispersion in the superionic Ag8SnSe6 sample with ultralow lattice thermal conductivity

description: Materials with superionic behavior are a group of novel thermoelectric candidates with excellent thermoelectric performance due to their ultralow lattice thermal conductivity. In the past five years, the study of the underlying mechanism for the ultralow lattice thermal conductivity has been a hot topic in the thermoelectric community. However, there still exist large controversies about the explanation, which is caused mainly by the lack of a large single crystal for phonon studies. Here, we have got a large Ag8SnSe6 single crystal with superionic behavior. We plan to use the LET cold neutron spectrometer to map the phonon dispersions as a function of temperature. From this experiment, we expect to find the anomalies in the phonon dispersions as well as the phonon lifetimes, hence giving a thorough understanding of the ultralow lattice thermal conductivity in superionic materials.
DOI: 10.5286/isis.e.rb2210253
title: Existence of magnetic order in superconducting Nickelates?

description: Recently, superconductivity has been surprisingly reported at 15 K in Sr-doped NdNiO2 suggesting the existence of a new family of high-temperature superconductors. The structure of this nickel oxide consists in a stacking of NiO2 layers separated by rare-earth spacer layer, stabilizing the unusual Ni1+ oxidation state, corresponding to 3d9 electronic configuration, similarly to the cuprates. Our recent measurements bring evidence for a magnetic order in two samples, a pure and 5% Sr-doped (Nd,Sr)NiO2 that could be at the origin of magnetic fluctuations playing a key role in the emergence of superconductivity. We propose to precisely study the newly discovered antiferromagnetic phase in the (Nd1-xSrx)NiO2 x=0,0.05,0.1,0.15, the amplitude of the corresponding magnetic moment and its evolution as a function of temperature. We thus ask for 3 days on the WISH high resolution diffractometer.
DOI: 10.5286/isis.e.rb2210253-1
title: Existence of magnetic order in superconducting Nickelates?

description: Recently, superconductivity has been surprisingly reported at 15 K in Sr-doped NdNiO2 suggesting the existence of a new family of high-temperature superconductors. The structure of this nickel oxide consists in a stacking of NiO2 layers separated by rare-earth spacer layer, stabilizing the unusual Ni1+ oxidation state, corresponding to 3d9 electronic configuration, similarly to the cuprates. Our recent measurements bring evidence for a magnetic order in two samples, a pure and 5% Sr-doped (Nd,Sr)NiO2 that could be at the origin of magnetic fluctuations playing a key role in the emergence of superconductivity. We propose to precisely study the newly discovered antiferromagnetic phase in the (Nd1-xSrx)NiO2 x=0,0.05,0.1,0.15, the amplitude of the corresponding magnetic moment and its evolution as a function of temperature. We thus ask for 3 days on the WISH high resolution diffractometer.
DOI: 10.21233/n31502
title: Yathkyed Lake Site 3 pollen surface sample dataset

description: Raw data for the Yathkyed 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/e5e-c3y-5yh
title: Crepis foetida subsp. foetida

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/knv-76v-ck4
title: Carex appropinquata Schumach.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb1910031-2
title: Pressure-induced novel quantum states in a triangular lattice antiferromagnet.

description: Quantum antiferromagnets on a triangular lattice are the most important prototype materials to investigate the phenomena of geometrical frustration, quantum fluctuations and magnetic order in solids. Apart from highly unusual magnetic properties, these systems possess a very rich phase diagram ranging from a simple unfrustrated square lattice to a quantum spin liquid, yet to be confirmed experimentally. On the other hand, almost nothing is known on the pressure-driven evolution of their magnetic properties. Recently, using the high-field TDO techniques, a number of novel field-induced transitions were revealed in the high-pressure phase of the triangular lattice antiferromagnet Cs2CuCl4. The exact nature of the observed field-induced phase transitions are to be clarified by means of magneto-structural studies, which is the main goal of the proposed research.
DOI: 10.5286/isis.e.rb2269000
title: Understanding the structure of novel RNA-Lipid nanoparticles using SANS

description: The recent Covid-19 pandemic has shown both the efficacy and need to develop effective vaccines and drug delivery. One technology which has been very effective at this uses lipid nanoparticles. These are small particles in which the lipid layer allows us to target the immune system. The nanoparticles are used to deliver a dose of mRNA. The exact dose held depends upon the encapsulation properties of the nanoparticle. We propose using SANS to look at the properties of a novel lipid nanoparticle system to determine how this system is able to encpsulate a high degree of mRNA and also remain very stable over a long period of time, contrary to other systems which require freezing.
DOI: 10.5286/isis.e.rb2269000-1
title: Understanding the structure of novel RNA-Lipid nanoparticles using SANS

description: The recent Covid-19 pandemic has shown both the efficacy and need to develop effective vaccines and drug delivery. One technology which has been very effective at this uses lipid nanoparticles. These are small particles in which the lipid layer allows us to target the immune system. The nanoparticles are used to deliver a dose of mRNA. The exact dose held depends upon the encapsulation properties of the nanoparticle. We propose using SANS to look at the properties of a novel lipid nanoparticle system to determine how this system is able to encpsulate a high degree of mRNA and also remain very stable over a long period of time, contrary to other systems which require freezing.
DOI: 10.3535/h5z-qk7-phm
title: Gypsophila perfoliata L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/hal-jg2-t8x
title: Asteraceae Dumort.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2210245-1
title: Magnetic excitations in a quantum spin ladder (C5H9NH3)2CuBr4

description: In order to harvest the potential of quantum technologies, a strong understanding of many-body quantum physics is needed. In this respect, Quantum Simulators are the models that allow us to learn that - they can be solved, measured and modified. Among them, quantum spin ladders bridge the gap between one and two dimensions and have complex excitation spectra, which depend on the relative strengths of the leg and rung exchange interactions. While the realization of strong-rung ladders is fairly common, only one strong-leg ladder has been studied in detail so far. Here, we propose to use neutron spectroscopy to unveil the magnetic excitations in a new quantum spin ladder (C5H9NH3)2CuBr4 and determine whether it is a strong-leg system as bulk measurements suggest. This would position it as a quantum simulator for further control studies, for example using uniaxial pressure.
DOI: 10.5286/isis.e.rb2210377
title: Antiwear film formation at solid-dodecane interfaces

description: Wear of sliding surfaces leads to the failure of mechanical components, financial loss and ultimately, energy inefficiency. Antiwear additives can be included in lubricants, which adsorb at contacting surfaces and undergo chemical transformation to form protective coatings. However, the film formation of antiwear coatings is ill-defined, especially on non-ferrous surfaces such as aluminium alloys. In this experiment, the temperature-induced transformation of zinc dialkyldithiophosphate (ZDDP) will be investigated as a function of time at the interfaces formed between dodecane and iron oxide, silicon oxide and aluminium oxide.
DOI: 10.5286/isis.e.rb2210377-1
title: Antiwear film formation at solid-dodecane interfaces

description: Wear of sliding surfaces leads to the failure of mechanical components, financial loss and ultimately, energy inefficiency. Antiwear additives can be included in lubricants, which adsorb at contacting surfaces and undergo chemical transformation to form protective coatings. However, the film formation of antiwear coatings is ill-defined, especially on non-ferrous surfaces such as aluminium alloys. In this experiment, the temperature-induced transformation of zinc dialkyldithiophosphate (ZDDP) will be investigated as a function of time at the interfaces formed between dodecane and iron oxide, silicon oxide and aluminium oxide.
DOI: 10.3535/74s-6wc-zjx
title: Leontodon crispus Vill.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/m72-yvw-bwa
title: Xanthium orientale var. albinum (Widder) Adema & M. T. Jansen

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2010544
title: DNA hybridisation-mediated vesicle fusion - kinetics and fate of fusion

description: Fusing vesicles in a controlled manner has major advantages in diagnostic and drug delivery applications, however achieving controlled fusion is not trivial. Commonly used physically mediated fusion techniques such as co-extrusion and freeze-thawing lead to heterogeneous fusion products, where the mixing ratio of different vesicle species is not easily controlled. We have designed a DNA hybridisation-based assay for directed fusion of vesicles upon mixing, and applied it in a recently published diagnostic assay to detect microRNA. In a previous experiment at ZOOM, we studied DNA-functionalised vesicle formulations before and after fusion. Here we will expand this dataset to i) include longer time points to identify when DNA-mediated lipid mixing plateaus, and ii) characterise fusion products with respect to lipid formulation, mixing ratios and DNA density on the vesicle surfaces.
DOI: 10.5286/isis.e.rb2010544-1
title: DNA hybridisation-mediated vesicle fusion - kinetics and fate of fusion

description: Fusing vesicles in a controlled manner has major advantages in diagnostic and drug delivery applications, however achieving controlled fusion is not trivial. Commonly used physically mediated fusion techniques such as co-extrusion and freeze-thawing lead to heterogeneous fusion products, where the mixing ratio of different vesicle species is not easily controlled. We have designed a DNA hybridisation-based assay for directed fusion of vesicles upon mixing, and applied it in a recently published diagnostic assay to detect microRNA. In a previous experiment at ZOOM, we studied DNA-functionalised vesicle formulations before and after fusion. Here we will expand this dataset to i) include longer time points to identify when DNA-mediated lipid mixing plateaus, and ii) characterise fusion products with respect to lipid formulation, mixing ratios and DNA density on the vesicle surfaces.
DOI: 10.5286/isis.e.rb2210245
title: Magnetic excitations in a quantum spin ladder (C5H9NH3)2CuBr4

description: In order to harvest the potential of quantum technologies, a strong understanding of many-body quantum physics is needed. In this respect, Quantum Simulators are the models that allow us to learn that - they can be solved, measured and modified. Among them, quantum spin ladders bridge the gap between one and two dimensions and have complex excitation spectra, which depend on the relative strengths of the leg and rung exchange interactions. While the realization of strong-rung ladders is fairly common, only one strong-leg ladder has been studied in detail so far. Here, we propose to use neutron spectroscopy to unveil the magnetic excitations in a new quantum spin ladder (C5H9NH3)2CuBr4 and determine whether it is a strong-leg system as bulk measurements suggest. This would position it as a quantum simulator for further control studies, for example using uniaxial pressure.
DOI: 10.3535/7f5-dmw-v96
title: Crepis pulchra L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2210085-1
title: Performance test of the DREAM bi-spectral switch

description: DREAM is a diffractometer instrument that will be built at the European Spallation Source (ESS). DREAM will view both the cold and thermal moderators of ESS, thus a bi-spectral extraction system will be used to run experiments with a large wavelength band. The system has to enable reflections of neutrons from the cold moderator while being optimized for transmitting neutrons from the thermal moderator. The device consists of nominal 153 Si wafers with a thickness of 0.13 mm with a NiTi super mirror coating (m-value 3). The wafers are inclined by 0.57° to the instrument (thermal) beam axis. The angular tolerance is ±0.05°. The performance of the Si-wafer stack has been validated by simulations. The bi-spectral switch installation will be done in Q2 2022 inside the ESS bunker, thus testing the device with the thermal neutrons before the installation is time-critical.
DOI: 10.5286/isis.e.rb2210299
title: Unravelling the solution structures and stability of medically- and industrially-important anti-COVID nanobodies

description: The use of therapeutic antibodies as drugs made by pharmaceutical companies is increasing rapidly (&gt;$75 billion market). Understanding the solution structures and stability of such human antibodies is essential for improving their manufacturing and developing their applications. The hinge disulphides that link the antibody light and heavy chains have a major influence on antibody reactivity. We have recently completed studies of human IgG1, IgG2, IgG3 and IgG4 antibodies, using SAXS, SANS, and analytical ultracentrifugation, plus atomistic modelling. Nanobodies differ from human IgG by only possessing two heavy chains and no light chains, thus offering enhanced epitope binding properties. This continuation project will identify the solution conformation of anti-COVID nanobodies and related molecules by such a combination of methods and their atomistic modelling.
DOI: 10.5286/isis.e.rb2210299-1
title: Unravelling the solution structures and stability of medically- and industrially-important anti-COVID nanobodies

description: The use of therapeutic antibodies as drugs made by pharmaceutical companies is increasing rapidly (&gt;$75 billion market). Understanding the solution structures and stability of such human antibodies is essential for improving their manufacturing and developing their applications. The hinge disulphides that link the antibody light and heavy chains have a major influence on antibody reactivity. We have recently completed studies of human IgG1, IgG2, IgG3 and IgG4 antibodies, using SAXS, SANS, and analytical ultracentrifugation, plus atomistic modelling. Nanobodies differ from human IgG by only possessing two heavy chains and no light chains, thus offering enhanced epitope binding properties. This continuation project will identify the solution conformation of anti-COVID nanobodies and related molecules by such a combination of methods and their atomistic modelling.
DOI: 10.3535/gqd-xnx-l8d
title: Crataegus laevigata (Poir.) DC.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/vcv-cjy-wvb
title: Campanula thyrsoides subsp. thyrsoides

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2210085
title: Performance test of the DREAM bi-spectral switch

description: DREAM is a diffractometer instrument that will be built at the European Spallation Source (ESS). DREAM will view both the cold and thermal moderators of ESS, thus a bi-spectral extraction system will be used to run experiments with a large wavelength band. The system has to enable reflections of neutrons from the cold moderator while being optimized for transmitting neutrons from the thermal moderator. The device consists of nominal 153 Si wafers with a thickness of 0.13 mm with a NiTi super mirror coating (m-value 3). The wafers are inclined by 0.57° to the instrument (thermal) beam axis. The angular tolerance is ±0.05°. The performance of the Si-wafer stack has been validated by simulations. The bi-spectral switch installation will be done in Q2 2022 inside the ESS bunker, thus testing the device with the thermal neutrons before the installation is time-critical.