cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5286/isis.e.rb2410613-1
title: Investigation of the structural and magnetic clustering near the PV-BM topotactic phase transition in LSMO films by PNR

description: Controlled oxygen release/uptake in complex oxides can induce changes of the crystal structure and simultaneously of the magnetic and electrical properties. In La1-xSrxMnO3 (LSMO) the gradual oxygen desorption triggers a phase transition from the initial ferromagnetic (FM) perovskite (PV) structure to an oxygen vacancy layered antiferromagnetic (AFM) brownmillerite (BM) structure, i.e. La1-xSrxMnO2.5. Our previous work suggests a potential structural and magnetic clustering process during this phase transition. We propose to measure half-polarized PNR at POLREF to gain additional information on the potential clustering phenomena compared with GISANS. This study aims for a systematic and comprehensive understanding of the oxygen vacancy induced topotactic phase transition on two length scales (i.e., microscopic and mesoscopic), revealing the relationship between the presence of oxygen vacancies and the resulting structural and magnetic evolution. Such an understanding is important for the design of novel ionotronic devices.
DOI: 10.5286/isis.e.rb2410629
title: Unusual self-assembly of bicephalous surfactants: Nanomorphology and nanostructure from SANS

description: A novel class of surfactants have been synthesized – which we term bicephalous surfactants, with two quaternary ammonium headgroups linked by a C2 linker and 1 or 2 Cn-acyl tails connected to one of the headgroups. These bicephalous surfactants exhibit remarkable thermoresponsive and rheological behavior. For instance, the single-tailed C18-DQA undergoes reversible thermally-induced gelation-fluidization at ~ the body temperature. It is particularly unusual and perplexing that gelation would occur upon heating, in contrast to other small-molecule gels. Both trial SANS and cryo-TEM results indicated formation elongated aggregates. The zero-shear viscosity of the 800 mM C18-DQA solution would increase from 0.02 Pa s to 100,000 Pa s, by 7-8 orders of magnitude upon gelation. These striking observations from low molecular weight molecules are completely new and could open up significant potential applications. Here, we propose a first SANS study of the nanostructure and nanomorphology of self-assembled bicephalous surfactants, systematically varying the molecular architecture (sing tail and double tail of different lengths) and temperature.
DOI: 10.5286/isis.e.rb2490146-1
title: Crystal structure of the novel superprotonic conductor HfH5(PO4)3
DOI: 10.3535/468-a1m-ns5
title: Hypecoum imberbe Sm.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/8r7-ctb-a9k
title: Brassicaceae Burnett

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2410138
title: Lipid-based nanostructured drug carriers designed for Docetaxel delivery: Characterization using Inelastic Neutron Scattering

description: Cancer is one of the leading causes of mortality worldwide, accounting for one in six deaths. This disease affects individuals of all ages and ethnic backgrounds, presenting a significant challenge to global public health. The main antineoplastic agents, such as docetaxel (DTX) used in the treatment of lung and breast cancer, have limitations such as low water solubility, tissue toxicity and rapid degradation. Such challenges can be overcome with the use of nanocarriers, as in the case of nanostructured lipid carriers (NLC) [1,2]. This compound is a promising contribution by nanotechnology in pharmaceutical sciences increasing the bioavailability [2,3]. We developed a nanostructured hybrid system composed of NLC incorporating docetaxel (DTX, 0.5%) adsorbed on a biopolymeric matrix of xanthan-chitosan gum (3:1%). Our objective in this proposal is to study the structural organization of lipid-based drug delivery systems: NLC composed of Myristyl Myristate (SL) and Miglyol 812 (LL) in two different concentrations containing DTX and the surfactant Pluronic F58, in addition to Copaiba Oil.
DOI: 10.5286/isis.e.rb2410138-1
title: Lipid-based nanostructured drug carriers designed for Docetaxel delivery: Characterization using Inelastic Neutron Scattering

description: Cancer is one of the leading causes of mortality worldwide, accounting for one in six deaths. This disease affects individuals of all ages and ethnic backgrounds, presenting a significant challenge to global public health. The main antineoplastic agents, such as docetaxel (DTX) used in the treatment of lung and breast cancer, have limitations such as low water solubility, tissue toxicity and rapid degradation. Such challenges can be overcome with the use of nanocarriers, as in the case of nanostructured lipid carriers (NLC) [1,2]. This compound is a promising contribution by nanotechnology in pharmaceutical sciences increasing the bioavailability [2,3]. We developed a nanostructured hybrid system composed of NLC incorporating docetaxel (DTX, 0.5%) adsorbed on a biopolymeric matrix of xanthan-chitosan gum (3:1%). Our objective in this proposal is to study the structural organization of lipid-based drug delivery systems: NLC composed of Myristyl Myristate (SL) and Miglyol 812 (LL) in two different concentrations containing DTX and the surfactant Pluronic F58, in addition to Copaiba Oil.
DOI: 10.5286/isis.e.rb2410613
title: Investigation of the structural and magnetic clustering near the PV-BM topotactic phase transition in LSMO films by PNR

description: Controlled oxygen release/uptake in complex oxides can induce changes of the crystal structure and simultaneously of the magnetic and electrical properties. In La1-xSrxMnO3 (LSMO) the gradual oxygen desorption triggers a phase transition from the initial ferromagnetic (FM) perovskite (PV) structure to an oxygen vacancy layered antiferromagnetic (AFM) brownmillerite (BM) structure, i.e. La1-xSrxMnO2.5. Our previous work suggests a potential structural and magnetic clustering process during this phase transition. We propose to measure half-polarized PNR at POLREF to gain additional information on the potential clustering phenomena compared with GISANS. This study aims for a systematic and comprehensive understanding of the oxygen vacancy induced topotactic phase transition on two length scales (i.e., microscopic and mesoscopic), revealing the relationship between the presence of oxygen vacancies and the resulting structural and magnetic evolution. Such an understanding is important for the design of novel ionotronic devices.
DOI: 10.3535/gt6-ak2-fvs
title: Ceratocephala falcata (L.) Pers.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2368003-1
title: Microscopic dynamics of brain lipids in a model membrane: Influence of phenylalanine
DOI: 10.5286/isis.e.rb2420419
title: Investigation of dynastic Mughal Blade from The Royal Collection through non-invasive methods

description: The sword under investigation is of extraordinary importance to the history of Moghul arms and armour. It is inscribed on both sides of the blade with Persian verses and the title of the emperor for whom it was made, Jahangir (r. 1605-1627). Further inscriptions demonstrate that the sword was inherited by his son and successor Shah Jahan (r. 1628-1658) and by his successor ‘Alamgir (r. 1658-1707). Mughal swords with known provenance are extremely rare and this would be one of the earliest royal Mughal blades to be analysed. It has also been suggested this blade may be one documented in contemporary accounts as being made for the emperor from meteoric iron. A number of Mughal blades, including another owned by Shah Jahan himself were analysed with neutron methods. In addition, about 72 Indian blades from the Wallace Collection have been analysed at ISIS using the INES instrument since 2015, as well as a number from the princely Arsenal of Hyderabad.
The analysis aims to identify the composition of the blade, particularly in terms of the carbon content and its distribution along the blade, and nickel content, if present, to determine whether meteoric iron was used in the manufacturing. Testing will also ascertain what metalworking processes the blade has been through (forging and heat treatments). This would be the earliest Mughal sword to be investigated, and would provide an invaluable benchmark for the field.
DOI: 10.5286/isis.e.rb2420419-1
title: Investigation of dynastic Mughal Blade from The Royal Collection through non-invasive methods

description: The sword under investigation is of extraordinary importance to the history of Moghul arms and armour. It is inscribed on both sides of the blade with Persian verses and the title of the emperor for whom it was made, Jahangir (r. 1605-1627). Further inscriptions demonstrate that the sword was inherited by his son and successor Shah Jahan (r. 1628-1658) and by his successor ‘Alamgir (r. 1658-1707). Mughal swords with known provenance are extremely rare and this would be one of the earliest royal Mughal blades to be analysed. It has also been suggested this blade may be one documented in contemporary accounts as being made for the emperor from meteoric iron. A number of Mughal blades, including another owned by Shah Jahan himself were analysed with neutron methods. In addition, about 72 Indian blades from the Wallace Collection have been analysed at ISIS using the INES instrument since 2015, as well as a number from the princely Arsenal of Hyderabad.
The analysis aims to identify the composition of the blade, particularly in terms of the carbon content and its distribution along the blade, and nickel content, if present, to determine whether meteoric iron was used in the manufacturing. Testing will also ascertain what metalworking processes the blade has been through (forging and heat treatments). This would be the earliest Mughal sword to be investigated, and would provide an invaluable benchmark for the field.
DOI: 10.3535/ed4-00t-chk
title: Plantae

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/jcm-ctb-196
title: Brassicaceae Burnett

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2055012-4
title: ICRD00070
DOI: 10.5286/isis.e.rb2368003
title: Microscopic dynamics of brain lipids in a model membrane: Influence of phenylalanine
DOI: 10.5286/isis.e.rb2410532-2
title: Anharmonicity as a reaction indicator: thermal vibrations in the graphitic carbon nitride precursor melamine

description: In our proposed study, we investigate melamine (C3N6H6) as a precursor for the graphitic carbon nitride (g-CN) materials with interesting properties for e.g. catalysis. A previous electron density study of melamine by synchrotron single crystal X-ray diffraction (SCXRD) at 25 K, lead to a proposed mechanism for the condensation reaction of melamine through melam to g-CN by evaporation of ammonia. The condensation hypothesis is based on structural asymmetry, one amine group in melamine is significantly more pyramidal (like ammonia) than the two other, and thus strongly relies on accurate hydrogen atom positions. Single crystal neutron diffraction experiments could uniquely offer information on especially unambiguous hydrogen positions, anisotropic atomic displacement parameters and possibly anharmonic vibrations, which could validate the conclusions from the SCXRD study. We, furthermore, intend to investigate anharmonic motion as a reaction indicator for the condensation process. This requires accurate determination of structure and anharmonic vibrational parameters of nitrogen and hydrogen at several temperatures, which only neutron diffraction can provide. We apply for 7 days of beamtime at the SXD instrument, allowing us to conduct neutron diffraction experiments at 25, 100, 300 and 400 K.
DOI: 10.3535/e6r-1e6-fzv
title: Scandix iberica M. Bieb.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/tnl-6aj-r42
title: Odontites aucheri Boiss.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2467015
title: Determination of crystal electric fields in SSL Yb2Be2GeO7

description: We propose to measure the crystal electric field levels in the Shastry-Sutherland lattice material Yb2Be2GeO7 on MERLIN. The crystal electric fields are essential for determining the magnetic groundstate, which we currently believe to be a spin liquid.
DOI: 10.5286/isis.e.rb2467015-1
title: Determination of crystal electric fields in SSL Yb2Be2GeO7

description: We propose to measure the crystal electric field levels in the Shastry-Sutherland lattice material Yb2Be2GeO7 on MERLIN. The crystal electric fields are essential for determining the magnetic groundstate, which we currently believe to be a spin liquid.
DOI: 10.3535/6q8-690-3wv
title: Crepis hierosolymitana Boiss.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/lla-crb-zm6
title: Pallenis spinosa (L.) Cass.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2410396-1
title: Development of interfacial models to understand preservation through neutron reflection

description: The aim of this project is to understand how such surface-active preservative actives work and how additional surface-active molecules could help boost their biocidal efficacy. This project is part of our ongoing collaboration to apply neutron and X-ray techniques to improve our understanding of antimicrobial efficacy and dynamic killing, however it will be the first to explore preservative actives. Neutron reflection is about the only technique that can help unravel structural information at the molecular and membrane levels about how preservatives interact with microbial membranes, with and without booster molecules. Model lipid membrane systems will be developed to aid the determination of the structure and composition of the interfacial films when the boosters, bioactive and their representative mixtures interact with the lipid models mimicking different microbial membranes. This work should require 3 days of beam time.
DOI: 10.5286/isis.e.rb2410556
title: SANSPOL on the M(E) effect in BSMFO as function of magnetic and electric field

description: Among the single-phase candidates for multiferroicity, the hexaferrite family is of particular interest due to the giant magnetoelectric (ME) coupling, which was recently reported in single crystalline Ba2-xSrxMg2Fe12O22 (BSMFO) with x = 1.6. However, its microscopic origin is still in debate. As a follow-up to our previous experiment at ZOOM (2210358), we propose to shed light on the ME effect in BSMFO using SANSPOL under applied magnetic and electric fields, and to extend our knowledge by measuring the full magnetoelectric hysteresis loop.
DOI: 10.5286/isis.e.rb2410556-1
title: SANSPOL on the M(E) effect in BSMFO as function of magnetic and electric field

description: Among the single-phase candidates for multiferroicity, the hexaferrite family is of particular interest due to the giant magnetoelectric (ME) coupling, which was recently reported in single crystalline Ba2-xSrxMg2Fe12O22 (BSMFO) with x = 1.6. However, its microscopic origin is still in debate. As a follow-up to our previous experiment at ZOOM (2210358), we propose to shed light on the ME effect in BSMFO using SANSPOL under applied magnetic and electric fields, and to extend our knowledge by measuring the full magnetoelectric hysteresis loop.
DOI: 10.3535/40h-0ec-pbm
title: Cirsium Mill.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/6jn-5c9-wna
title: Eryngium falcatum F. Delaroche

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2410396
title: Development of interfacial models to understand preservation through neutron reflection

description: The aim of this project is to understand how such surface-active preservative actives work and how additional surface-active molecules could help boost their biocidal efficacy. This project is part of our ongoing collaboration to apply neutron and X-ray techniques to improve our understanding of antimicrobial efficacy and dynamic killing, however it will be the first to explore preservative actives. Neutron reflection is about the only technique that can help unravel structural information at the molecular and membrane levels about how preservatives interact with microbial membranes, with and without booster molecules. Model lipid membrane systems will be developed to aid the determination of the structure and composition of the interfacial films when the boosters, bioactive and their representative mixtures interact with the lipid models mimicking different microbial membranes. This work should require 3 days of beam time.
DOI: 10.5286/isis.e.rb2410415-2
title: Enhanced nitrogen-based magneto-ionic manipulation of Exchange Bias in Co/CoMnN heterostructures

description: In the framework of nanomagnetism and spintronics, electric field control of exchange-biased heterostructures emerges as a low energy consumption approach, implemented through several methodologies such as multiferroics, carrier doping, and magneto-ionics. Specifically, nitrogen-based magneto-ionics stands out due to its fast ionic motion and CMOS compatibility. Indeed, recent research in a Ta/CoFe(FM)/MnN(AFM)/Ta system showcases the potential of nitrogen-based magneto-ionics in the field of exchange-biased heterostructures, enhancing the exchange bias field by 5% at 300 K and 19% at 10 K. In the present work, the MnN(AFM) layer is gradually doped with increasing amounts of Co. We anticipate a decrease in the Mn-N bonding energy due to the addition, therefore increasing the amount of nitrogen that diffuses throughout the structure, in a manner complementary to what occurs in CoN structures when doped with small amounts of Mn. A series of Ta/Co(FM)/CoxMn1-xN(AFM)/Ta samples with Co at% (x) ranging from 0 to 24% reveals significant exchange bias up to 10% Co. Understanding how nitrogen relocates after field cooling (FC) the samples and treating them with an electric field (VC) would enlighten the mechanisms behind the trend observed by magnetometry: as Co at.% (x) content increases, so does the exchange bias relative change between the FC state and after the VC. By using PNR, we want to track the nitrogen depth-dependent distribution in our heterostructures.
DOI: 10.5286/isis.e.rb2455005-3
title: Characterization of nanoscale structures of different mRNA-LNP formulations and its correlation with long-term stability
DOI: 10.34816/ifao.archives.232779
title: SAQQARA_nb_1994_03273

description: Référence : nb_1994_03273<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/a2j-4pq-36k
title: Ruta graveolens L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2310169-1
title: High energy spin fluctuations in low-tellurium-doped FeSe single crystals

description: Recently, we have grown low-tellurium-doped FeSe single crystals successfully by the chemical vapor transport method. Our previous inelastic neutron scattering measurements have revealed strong spin fluctuations at the stripe and Néel wave vectors in FeSe, both of which are strongly coupled with nematicity. The nematic transition temperature in FeSe decreases with increasing tellurium concentration, and a nematic critical point is further proposed by transport measurements. Tc exhibits a highly unusual non-monotonic behaviour, reaching a local minimum of about 6 K at the critical tellurium concentration ~ 0.3. To understand these exotic phenomena, studying Fe(Te,Se) from FeSe side, i.e., with low tellurium dopant level is important. In this experiment, we propose to map out the spin fluctuation spectrum and its interplay with nematicity and superconductivity in FeTe0.3Se0.7. MSLICE will be used to analyse the data. The success of the proposed experiment, combined with the previous results, will lead to a comprehensive understanding of the magnetic ground state and its relationship with nematicity and superconductivity in Fe(Te, Se) system and offer important indications on the roles of the stripe and the Néel spin fluctuations in iron chalcogenides.
DOI: 10.5286/isis.e.rb2320265
title: Neutron Imaging of distribution of hydrogen in electrochemically charged high entropy alloys

description: Abstract
Hydrogen is heralded as the key fuel for a ‘net zero’ future. The production, containment, and transportation of hydrogen is crucial for achieving the potential it offers. The ramifications of hydrogen interacting with metals and causing degradation have been a subject of intense research since the late 19th century. Among these topics, Hydrogen Embrittlement (HE) stands out as a widely studied and discussed phenomenon. HE is marked by the deterioration of mechanical properties, specifically the strength and ductility of the material, ultimately culminating in the brittle failure of structural components. In situations where hydrogen is present and can cause damage to materials a notable contender that has gained significant attention in withstanding HE is high entropy alloys (HEA). To fully understand the mechanism of hydrogen embrittlement in HEA and to improve the materials resistance towards HE, it is required to have a deeper understanding of the ingress of hydrogen into the metals, the transport of hydrogen, the interaction of hydrogen with defects in the crystal lattice. A thermal dependent hydrogen diffusion study proposed here uses a neutron radiographic technique to visualize diffusible hydrogen in electrochemically charged Al(0.1)HEA, and quantify the concentration and diffusivity of hydrogen in these alloys.
DOI: 10.5286/isis.e.rb2320265-1
title: Neutron Imaging of distribution of hydrogen in electrochemically charged high entropy alloys

description: Abstract
Hydrogen is heralded as the key fuel for a ‘net zero’ future. The production, containment, and transportation of hydrogen is crucial for achieving the potential it offers. The ramifications of hydrogen interacting with metals and causing degradation have been a subject of intense research since the late 19th century. Among these topics, Hydrogen Embrittlement (HE) stands out as a widely studied and discussed phenomenon. HE is marked by the deterioration of mechanical properties, specifically the strength and ductility of the material, ultimately culminating in the brittle failure of structural components. In situations where hydrogen is present and can cause damage to materials a notable contender that has gained significant attention in withstanding HE is high entropy alloys (HEA). To fully understand the mechanism of hydrogen embrittlement in HEA and to improve the materials resistance towards HE, it is required to have a deeper understanding of the ingress of hydrogen into the metals, the transport of hydrogen, the interaction of hydrogen with defects in the crystal lattice. A thermal dependent hydrogen diffusion study proposed here uses a neutron radiographic technique to visualize diffusible hydrogen in electrochemically charged Al(0.1)HEA, and quantify the concentration and diffusivity of hydrogen in these alloys.
DOI: 10.34816/ifao.archives.232780
title: SAQQARA_nb_1994_03286

description: Référence : nb_1994_03286<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/kgq-05l-6mr
title: Gagea fibrosa (Desf.) Schult. & Schult.f.

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