cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5286/isis.e.rb2070013-1
title: Spin Dynamics Study in a Distorted Triangular Lattice System lambda-(STF)2GaCl4

description: Research on quantum spin liquid (QSL) state in frustrated magnetism is a critical issue in the field of condensed matter physics and some candidates for QSL have been found in organic conductors. It is still open question what plays essential for the QSL and nearby superconducting state, the frustration or disorder. To settle this discussion, we focused on the new candidate of QSL, λ-(STF)2GaCl4, whose lattice geometry is deviated from the regular triangular lattice. In the previous beamtime, we used Heliox and observed the homogeneous staggered moment growth at low temperature, however, we cannot observe its temperature dependence towards absolute zero. By clarifying the spin dynamics of this material through this proposed experiments using the dilution refrigerator, it will lead to an understanding of QSL and the elucidation of the origin of nearby superconducting phases.
DOI: 10.5286/isis.e.rb2420406
title: Magnetic structure in the S = 1/2 frustrated pyrochlore slab antiferromagnet Averievite Cu5(VO4)2O2CsCl

description: The search for quantum spin liquids (QSLs) remains a cornerstone of condensed matter physics. The S = 1/2 kagome Heisenberg magnet (KHM) is considered the most promising model system for the realisation of 2D QSLs. We have synthesised high quality powders of a new S=1/2 KHM averievite and its Zn-doped variants ZnxCu5–x(VO4)2O2CsCl, where x = 0, 1 and 2. We have performed extensive magnetometry, neutron diffraction (exp no. RB1920248) and inelastic neutron scattering (exp no. 4-05-746) measurements on our range of Zn-averievite samples between 0 &lt; x &lt; 2. Our results demonstrate the evolution of magnetic order to disorder with increased Zn doping, towards a potential QSL state in the ideal kagome geometry of x = 2. However, there are three major limitations with the data we have thus far collected due to the fact that the samples are powders: (i) the magnetic structure of x=0 cannot be uniquely refined; (ii) the spin waves of x=0 cannot be modelled using linear spin wave theory to extract exchange parameters; (iii) the powder-averaged Q-dependence of the diffuse excitations for x=2 do not allow confirmation of a QSL state. We will use this experiment to uniquely resolve the magnetic structure for x=0 using single crystal diffraction on WISH. The results will in turn aid the modelling of the spin waves in future inelastic scattering experiments and, ultimately, deepen our understanding of the potential QSL state when x=2.
DOI: 10.3535/s50-ng7-8x3
title: Hydrocotyle L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/zf6-tnt-mm0
title: Viola L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220504-2
title: Structural characterisation of Ca2+-containing complexes of humic acid (HA) and cationic polyelectrolyte

description: Humic acid (HA) exists ubiquitously in aquatic environments and does affect the water quality of drinking water. For its removal complexation with polycations is an essential step. In our experiment we will investigate PDADMAC and Quaternized Chitosan as polycations to characterise the structure of complexes formed with HA. We will focus on the effect of Ca2+, which enhances aggregation of HA complexes. Shape and size of the formed aggregates, especially their compactness and local structure will be determined by SANS as a function of mixing ratio, type of polycation, and Ca2+ concentration. This will lead to a detailed understanding of how the structure of HA complexes is affected by Ca2+ and polycation, respectively. This is fundamentally important for an improved understanding of this step in water treatment and allow for systematic improvements of HA removal in water industry.
DOI: 10.5286/isis.e.rb2420142
title: Assessment of the Beam Shaping Assembly for BNCT medical applications by neutron tomography

description: Boron Neutron Capture Therapy (BNCT) is a non-invasive binary radiotherapy combining the low-energy neutron irradiation and a boron-enriched drug able to accumulate preferentially in cancer cells. At present, the design of a clinical BNCT facility based on a 5 MeV, 30 mA radio frequency quadrupole proton accelerator is underway in Italy, in the frame of a PNC-PNRR project (ANTHEM) and requires an accurate determination of the materials to be used in the Beam Shaping Assembly (BSA). In this proposal, the proponents aim to characterise promising BSA solid samples obtained by sintering of AlF3 powder, Alliflu (AlF3+LiF) powder, and MgF2 powder. In particular, we aim to study these samples non-destructively assessing the presence of eventual porosity within the bulk of the sintered solid sample, its effective transparency to neutrons by 2D transmission image of the sample, and the uniformity of the lithium distribution. Results from this experiment will directly contribute to the development of the design of a clinical BNCT facility underway in Italy, in the frame of a PNC-PNRR project (ANTHEM). The new information on the uniformity of the samples will be in fact very useful to update the simulations of the BSA. These, in turn, will allow for a better tailoring of the materials and the geometrical configuration to optimise the neutron beam for the patients.
DOI: 10.5286/isis.e.rb2420142-1
title: Assessment of the Beam Shaping Assembly for BNCT medical applications by neutron tomography

description: Boron Neutron Capture Therapy (BNCT) is a non-invasive binary radiotherapy combining the low-energy neutron irradiation and a boron-enriched drug able to accumulate preferentially in cancer cells. At present, the design of a clinical BNCT facility based on a 5 MeV, 30 mA radio frequency quadrupole proton accelerator is underway in Italy, in the frame of a PNC-PNRR project (ANTHEM) and requires an accurate determination of the materials to be used in the Beam Shaping Assembly (BSA). In this proposal, the proponents aim to characterise promising BSA solid samples obtained by sintering of AlF3 powder, Alliflu (AlF3+LiF) powder, and MgF2 powder. In particular, we aim to study these samples non-destructively assessing the presence of eventual porosity within the bulk of the sintered solid sample, its effective transparency to neutrons by 2D transmission image of the sample, and the uniformity of the lithium distribution. Results from this experiment will directly contribute to the development of the design of a clinical BNCT facility underway in Italy, in the frame of a PNC-PNRR project (ANTHEM). The new information on the uniformity of the samples will be in fact very useful to update the simulations of the BSA. These, in turn, will allow for a better tailoring of the materials and the geometrical configuration to optimise the neutron beam for the patients.
DOI: 10.3535/956-xn2-6m8
title: Ifloga Cass.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/tm4-spc-y7e
title: Aegilops kotschyi Boiss.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb1970129
title: The Dimensionality of the Electron Transfer in Single-Stranded DNA

description: The study on the elctron motion in single-strand DNA (ssDNA) model molecule is proposed by applying the muon-labelling method. From our previous mSR studies, we are suggesting that the one-dimensional electron motion is fomred in ssDNA. This one-dimensional electron conductivity is supported form our STM measurements to be happen via the side-by-side connection between ssDNA molecules. We carried out the molecular-dynamics simulation (MDS) and revealed that the pai-pai stacking interaction between mlecules form the one-dimensional electron motion. Beceause the pai-pai stacking can vary with the temperature, we suggset in this proposal to measure the electron conductivity in ssDNA molecules by changing the temperature. Compring all information obtained from mSR, STM and MDS, we aim to clarify the electron motion behavior in DNA.
DOI: 10.5286/isis.e.rb1970129-1
title: The Dimensionality of the Electron Transfer in Single-Stranded DNA

description: The study on the elctron motion in single-strand DNA (ssDNA) model molecule is proposed by applying the muon-labelling method. From our previous mSR studies, we are suggesting that the one-dimensional electron motion is fomred in ssDNA. This one-dimensional electron conductivity is supported form our STM measurements to be happen via the side-by-side connection between ssDNA molecules. We carried out the molecular-dynamics simulation (MDS) and revealed that the pai-pai stacking interaction between mlecules form the one-dimensional electron motion. Beceause the pai-pai stacking can vary with the temperature, we suggset in this proposal to measure the electron conductivity in ssDNA molecules by changing the temperature. Compring all information obtained from mSR, STM and MDS, we aim to clarify the electron motion behavior in DNA.
DOI: 10.5286/isis.e.rb2490114-1
title: STUDY THE IMPACT OF SURFACE CHARGE ON ADSORBED PROTEIN DYNAMICS
DOI: 10.3535/shg-6dk-bxw
title: Discaria × serratifolia (Miers) Benth. & Hook. fil. ex Mast.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/tlv-m7y-33l
title: Mitraria coccinea Cav.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220463
title: Crystal structures and thermal expansion of the high pressure phases of ammonium bicarbonate, (ND4)DCO3
DOI: 10.5286/isis.e.rb2220463-1
title: Crystal structures and thermal expansion of the high pressure phases of ammonium bicarbonate, (ND4)DCO3
DOI: 10.5286/isis.e.rb2490296-1
title: Inhibiting Fe migration in Mn/Fe based P2-type layered oxide material by Ca pillaring and F doping
DOI: 10.3535/n9k-7a0-a0a
title: Myosotis sicula Guss.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2310062
title: Segmental Dynamics in Stiff-g-Flexible Bottlebrush Polymers

description: Linear side chains densely grafted onto a linear backbone, known as bottlebrushes, have attracted the focus of researchers due to their different behaviors compared to linear polymers. Not only the morphology differs significantly, also the dynamics changes. In our previous QENS experiment on PDMS-g-PDMS bottlebrushes, we found, that the segmental dynamics of the side chains slows down while increasing their lengths. Recent simulation work presents the same result for flexible-g-flexible systems, like PDMS-g-PDMS. However, changing the stiffness of the backbone reverses the behavior of the segmental relaxation times, i.e., an acceleration occurs while increasing the side chain length, as suggested by the simulation work. 
Intrigued by this result, we propose to study the side chain length dependent segmental relaxation of a stiff-g-flexible system in the melt state. For that purpose, we synthesized bottlebrush polymers with the stiff polynorbornene (PNB) backbone and flexible polypropylene oxide (PPO) side chains, PNB-g-PPO. This combination enables the grafting-through method ensuring a grafting density of 100%. 
Using different side chain lengths, at the same backbone length, allows to track the reversed dynamical behavior of the segmental relaxation by comparing the relaxation times in the available Q-range. Furthermore, the spatial resolution obtained via the Q-dependence allows to judge the heterogeneity of the sample and the influence arising from the stiff backbone.
DOI: 10.5286/isis.e.rb2310062-1
title: Segmental Dynamics in Stiff-g-Flexible Bottlebrush Polymers

description: Linear side chains densely grafted onto a linear backbone, known as bottlebrushes, have attracted the focus of researchers due to their different behaviors compared to linear polymers. Not only the morphology differs significantly, also the dynamics changes. In our previous QENS experiment on PDMS-g-PDMS bottlebrushes, we found, that the segmental dynamics of the side chains slows down while increasing their lengths. Recent simulation work presents the same result for flexible-g-flexible systems, like PDMS-g-PDMS. However, changing the stiffness of the backbone reverses the behavior of the segmental relaxation times, i.e., an acceleration occurs while increasing the side chain length, as suggested by the simulation work. 
Intrigued by this result, we propose to study the side chain length dependent segmental relaxation of a stiff-g-flexible system in the melt state. For that purpose, we synthesized bottlebrush polymers with the stiff polynorbornene (PNB) backbone and flexible polypropylene oxide (PPO) side chains, PNB-g-PPO. This combination enables the grafting-through method ensuring a grafting density of 100%. 
Using different side chain lengths, at the same backbone length, allows to track the reversed dynamical behavior of the segmental relaxation by comparing the relaxation times in the available Q-range. Furthermore, the spatial resolution obtained via the Q-dependence allows to judge the heterogeneity of the sample and the influence arising from the stiff backbone.
DOI: 10.3535/h1h-mbv-thj
title: Hordeum L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/s3q-pl4-nwk
title: Aristotelia chilensis (Molina) Stuntz

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2400053
title: Identification of long-range order of electrons in novel electride Ca5P3(e- )

description: Electrides are novel class of materials characterized by the stoichiometric presence of trapped electrons within a cationic framework, where such electrons behave similarly to anions. Much like the localized d- or f- electrons in conventional systems, electrides exhibit a variety of exotic properties owing where the degrees of freedom of the electride electron coupled with the underlying geometry and size of the cationic cavities come into play. However, detection and characterisation of electride electrons is challenging which has hindered their targeted design. We discovered a new candidate electride material Ca5P3(e-) comprising non-magnetic ions which undergoes long-range magnetic order around TN ~ 30K. As both Ca2+ and P3- ions are non-magnetic it is highly likely the observed magnetic behavior arises solely from the electride electrons. Ca5P3(e-) may be therefore the first known inorganic electride exhibiting such a magnetic transition originating solely from electride electrons. We aim to determine the magnetic structure of Ca5P3(e-) with neutron diffraction using WISH neutron diffractometer. Magnetic Bragg reflections would provide direct evidence of the presence of electride electrons, which would uncover crucial insights into the magnetic properties driven by electride electrons, thereby advancing our understanding of these exotic materials.
DOI: 10.5286/isis.e.rb2400053-1
title: Identification of long-range order of electrons in novel electride Ca5P3(e- )

description: Electrides are novel class of materials characterized by the stoichiometric presence of trapped electrons within a cationic framework, where such electrons behave similarly to anions. Much like the localized d- or f- electrons in conventional systems, electrides exhibit a variety of exotic properties owing where the degrees of freedom of the electride electron coupled with the underlying geometry and size of the cationic cavities come into play. However, detection and characterisation of electride electrons is challenging which has hindered their targeted design. We discovered a new candidate electride material Ca5P3(e-) comprising non-magnetic ions which undergoes long-range magnetic order around TN ~ 30K. As both Ca2+ and P3- ions are non-magnetic it is highly likely the observed magnetic behavior arises solely from the electride electrons. Ca5P3(e-) may be therefore the first known inorganic electride exhibiting such a magnetic transition originating solely from electride electrons. We aim to determine the magnetic structure of Ca5P3(e-) with neutron diffraction using WISH neutron diffractometer. Magnetic Bragg reflections would provide direct evidence of the presence of electride electrons, which would uncover crucial insights into the magnetic properties driven by electride electrons, thereby advancing our understanding of these exotic materials.
DOI: 10.5286/isis.e.rb2420313
title: Investigation of tuneable fabrication parameters in Gel Polymer Electrolytes for solid state batteries

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) due to their adequate energy density that makes them portable and convenient for applications from consumer electronics to electric vehicles. Gel polymer electrolytes (GPEs) have the stability benefit of a solid framework, whilst benefiting from the lower degree of crystallinity and superior interface compatibility for low resistance and high energy density LMBs. The ion conduction mechanism within such complex systems is dependent on the structure ¿ property relationships. Finally, trapping effect of liquid electrolyte in GPEs is a key point for their use in ASSB and that is why investigations on polymer structure is needed.
DOI: 10.5286/isis.e.rb2420313-1
title: Investigation of tuneable fabrication parameters in Gel Polymer Electrolytes for solid state batteries

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) due to their adequate energy density that makes them portable and convenient for applications from consumer electronics to electric vehicles. Gel polymer electrolytes (GPEs) have the stability benefit of a solid framework, whilst benefiting from the lower degree of crystallinity and superior interface compatibility for low resistance and high energy density LMBs. The ion conduction mechanism within such complex systems is dependent on the structure ¿ property relationships. Finally, trapping effect of liquid electrolyte in GPEs is a key point for their use in ASSB and that is why investigations on polymer structure is needed.
DOI: 10.3535/8hm-33y-r0k
title: Poaceae

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/xg2-afd-kms
title: Maytenus magellanica (Lam.) Hook. fil.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2270008
title: mSR study of antiferromagnetic fluctuations in the undoped (Ce-free) superconductor T'-La2-zEuzCuO4

description: This purpose is to investigate the electronic state of the undoped (Ce-free) superconductor Ln2CuO4 (Ln: lanthanide elements) with the Nd2CuO4-type (so-called T'-type) structure. In electron-doped (Ce-doped) high-Tc superconductors of T'-Ln2-xCexCuO4, it has been believed for a long time since the discovery that superconductivity appears at x ≳ 0.14 and an antiferromagnetic (AF) long-range order is developed at x ≲ 0.14. Therefore, the undoped mother compounds T’-Ln2CuO4 have been recognized to be Mott insulators. However, the observation of superconductivity in undoped T’-Ln2CuO4 has raised questions as to the electronic and magnetic states. The change of the AF correlation in T'-La2-zEuzCuO4 is expected to give the significant information of the electronic state.
DOI: 10.5286/isis.e.rb2270008-1
title: mSR study of antiferromagnetic fluctuations in the undoped (Ce-free) superconductor T'-La2-zEuzCuO4

description: This purpose is to investigate the electronic state of the undoped (Ce-free) superconductor Ln2CuO4 (Ln: lanthanide elements) with the Nd2CuO4-type (so-called T'-type) structure. In electron-doped (Ce-doped) high-Tc superconductors of T'-Ln2-xCexCuO4, it has been believed for a long time since the discovery that superconductivity appears at x ≳ 0.14 and an antiferromagnetic (AF) long-range order is developed at x ≲ 0.14. Therefore, the undoped mother compounds T’-Ln2CuO4 have been recognized to be Mott insulators. However, the observation of superconductivity in undoped T’-Ln2CuO4 has raised questions as to the electronic and magnetic states. The change of the AF correlation in T'-La2-zEuzCuO4 is expected to give the significant information of the electronic state.
DOI: 10.5286/isis.e.rb2420163-1
title: Investigating S-S bond formation during S2- oxidation in Li-rich sulfide battery materials using Inelastic Neutron Scattering

description: Layered lithium transition metal oxides continue to be the dominant cathode materials for rechargeable Li-ion batteries. However, these materials suffer from practical issues such as voltage hysteresis and capacity fade over cycling due to the formation of O2 molecules both evolved at the surface and trapped within the bulk. Replacing the oxide ions (O2-) with sulfide ions (S2-) to make Li-rich sulfides offers a promising route to mitigate these undesired anionic redox behaviours and opens up a whole new chemical space to discover high energy density cathodes. However, the fundamental mechanism of S-redox remains poorly understood. The nature of the oxidized sulfur species formed as S2- is oxidised during S-redox needs to be properly understood if we are to fully exploit the potential of anionic redox in next generation high energy density batteries. One of the main hypothesis in the field proposed that (S–S)n- dimers (where 0 &lt; n &lt; 4) are the sulfur oxidized species formed when these materials are charged to 3V, but the precise nature of the S-S bonding is not known. We propose to measure the vibrational properties of the S-S bond directly using Inelastic Neutron Scattering (INS) to conclusively determine the bond order in two battery cathodes, namely Li1.2Ti0.8S2 and Li2FeS2.
DOI: 10.34816/ifao.archives.232883
title: SAQQARA_nb_1994_03362

description: Référence : nb_1994_03362<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/hac-mr5-4es
title: Herniaria hirsuta L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.