# MLZ User Meeting 2021

Dec 7 – 8, 2021 Online only
Europe/Berlin timezone

## Contribution List

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Mr Gerhard van Wolfwinkel (Quirem Medical B.V.)
12/7/21, 9:55 AM
Nuclear, Particle, and Astrophysics
Talk

Quirem Medical BV, a Terumo company, is the manufacturer and supplier of holmium-166 (Ho-166) microspheres. These radioactive microspheres are used for Selective Internal Radiation Therapy (SIRT) which is one of the treatment options for liver tumors. Via placement of a micro-catheter in the liver artery of the patient, the microspheres are injected into the blood stream. These microspheres...

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Adam Deller (IPP)
12/7/21, 4:40 PM
Positrons
Talk

Buffer-gas traps (BGT) can efficiently accumulate positrons from a continuous source into a dense, low-energy nonneutral plasma. Inelastic collisions between positrons and nitrogen molecules promote capture of the former in the electric potential minimum created by a series of cylindrical electrodes in a uniform magnetic field. Usually, the positron source is a neon-moderated radioisotope of...

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Tobias Neuwirth
12/7/21, 1:40 PM
Neutron Methods
Talk

Additive manufacturing using the fused deposition modeling (FDM) allows to easily and inexpensively manufacture complex geometries using 3D printers. Typical base materials are thermoplastics such as polylactic acid (PLA) or acrylonitrile butadiene styrene (ABS). Recently, the availability of 3D printers has increased significantly, enabling the widespread use of additive manufacturing by...

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Andreas Stadler (FZ Jülich)
12/7/21, 1:40 PM
Soft Matter
Talk

The myelin sheath is an essential part of the nervous system, which enables rapid signal conduction. Damage of this complex membrane system results in demyelinating diseases such as multiple sclerosis (MS). The process in which myelin is generated in vivo is called myelination. In our study, we investigated the adhesion process of large unilamellar vesicles with a supported membrane bilayer...

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Neslihan Aslan (HZG, GEMS at MLZ)
12/7/21, 9:30 AM
Material Science
Talk

To cover the energy supply with renewable energies is a challenge of local and temporal distribution of renewable sources that requires energy storage technologies. Complex hydrides, which contain ions such as BH4- and NH2-, have a high hydrogen capacity and therefore are candidates for solid state hydrogen storage materials. Many studies reported the improvement of hydrogen reaction in...

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Mario Teixeira Parente
12/7/21, 4:40 PM
Neutron Methods
Talk

With the advancement of artificial intelligence and machine learning methods, autonomous approaches are recognized to have great potential for performing more efficient TAS experiments. In our view, it is crucial for such approaches to provide thorough evidence about respective performance improvements in order to increase acceptance within the community. Therefore, we propose a benchmarking...

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Arnab Majumdar (Helmholtz Zentrum hereon)
12/7/21, 4:15 PM
Neutron Methods
Talk

Optimization of computation time has always been a challenge in the world of computation. In this work, we address the computation of X-Ray and neutron scattering data from molecular dynamics simulations. There are multiple software solutions available for this; we have chosen sassena for our work. Sassena inherits distributed memory parallelization (MPI) from its previous version. This work...

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Qun Wan (Nanjing Agricultural University)
12/7/21, 9:30 AM
Structure Research
Talk

Acid-base catalysis, which involves one or more proton transfer reactions, is a chemical mechanism commonly employed by many enzymes. The molecular basis for catalysis is often derived from structures determined at the optimal pH for enzyme activity. However, direct observation of protons from experimental structures is quite difficult; thus, a complete mechanistic description for most enzymes...

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Yury Khaydukov (Max-Planck Institute for Solid State Research)
12/7/21, 1:15 PM
Quantum Phenomena
Talk

The magnetic state of exchanged biased CoO(20nm)/Co($d_F$) bilayers ($d_F$=5-20nm) was studied by means of polarized neutron reflectometry. By introducing a Nb(20nm) spacer layer between the CoO/Co bilayer and the Al$_2$O$_3$ substrate, we designed a resonator structure with significantly enhanced intensity of the spin-flip (SF) scattering at the position of the optical resonances. For the...

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Bastian Märkisch (Physik-Department, TUM)
12/7/21, 4:40 PM
Nuclear, Particle, and Astrophysics
Talk
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Tommy Nylander (Lund University)
12/8/21, 4:45 PM
Plenary talk
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Christina Geiger (Technical University of Munich, Chair of Functional Materials)
12/7/21, 4:40 PM
Soft Matter
Talk

After exposure to mixed water/cosolvent vapor, hydrated thin films of stimuli-responsive block copolymers with PNIPAM or PNIPMAM blocks exhibit a co-nonsolvency behavior. In a rapid film contraction, in either system, both water and cosolvent are expelled. Film swelling and contraction kinetics from saturated vapor are investigated in time-of-flight neutron reflectometry (ToF-NR) with...

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Andreas Bauer (Technische Universität München)
12/7/21, 4:40 PM
Structure Research
Talk

The availability of large high-quality single crystals is an important rerequisite for many studies in solid-state research. The optical floating-zone technique is an elegant method to grow such crystals, offering potential to prepare samples that may be hardly accessible with other techniques. As elaborated in this presentation, examples include single crystals with intentional compositional...

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Daniel Hausmann (Friedrich-Alexander-Universität Erlangen-Nürnberg)
12/7/21, 1:40 PM
Material Science
Talk

The polycrystalline Co-base superalloy CoWAlloy1 provides a high potential for high temperature applications as wrought alloy due to a high $\gamma$' precipitate fraction and $\gamma$/$\gamma$' lattice misfit which lead to excellent creep properties. However, cracking occurs during hot rolling. Therefore, this study investigated the origins of crack formation during processing.
Compression...

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Heiko Trepka
12/7/21, 9:55 AM
Quantum Phenomena
Talk

Materials realizing the scaling behavior of the XY model in two dimensions (2D) are sparse. Here we report on comprehensive neutron triple-axis measurements conducted at the FRM2, BER2, and ILL to investigate the critical static and dynamical magnetic fluctuations in the layered ruthenates Ca$_{2}$RuO$_{4}$ (CRO214) and Ca$_{3}$Ru$_2$O$_{7}$ (CRO327). Specifically, we probe the...

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Wiebke Lohstroh (MLZ - Technische Universität München)
12/8/21, 3:45 PM
Plenary
Plenary talk

The photon and neutron science community encompasses users from a broad range of scientific disciplines. With the advent of high speed detectors and increasingly complex instrumentation, the user community faces a common need for high-level, rapid data analysis and the challenge of implementing research data management for increasingly large and complex datasets. The aim of DAPHNE4NFDI is to...

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Vassily Vadimovitch Burwitz
12/7/21, 9:30 AM
Positrons
Talk

Predicting helium retention in tungsten is of relevance for future nuclear fusion reactors as it influences tritium uptake and transport, the latter effects being a critical question to achieve tritium self-sufficiency.
While the macroscopic effects of helium agglomeration in tungsten are known it is still an open topic of discussion what the underlying processes on a microscopic scale are....

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Mr Dominik M. Schwaiger (Technische Universität München, Fakultät für Physik, Lehrstuhl für Funktionelle Materialien, James-Franck-Str.1, 85748 Garching, Germany 2 Heinz Maier-Leibnitz-Zentrum (MLZ), Technische Universität München, Lichtenbergstr. 1, 85748 Garching, Germany)
12/7/21, 9:30 AM
Soft Matter
Talk

In organic photovoltaics, donor - acceptor bulk heterojunctions are often used as active layer due to their superior performance compared to e.g. planar structured devices. In this optically active polymer layer, photons are absorbed, excitons are created, subsequently dissipated at a material interface and hence free charges are provided. A promising low-bandgap electron donor material is the...

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Wolfgang Zeier (Justus-Liebig-University Giessen)
12/7/21, 1:15 PM
Structure Research
Talk

The advent of solid-state batteries has spawned a recent increase in interest in lithium conducting solid electrolytes, especially in the lithium thiophosphates. However, many open questions remain when trying to optimize electrolytes and understand solid state battery chemistries.
In this presentation, we will show how an understanding of the structure-transport properties of the lithium...

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Thomas Keller (MPI for Solid State Research, Stuttgart)
12/7/21, 9:30 AM
Neutron Methods
Talk

We propose a method for kinetic neutron reflectometry with a time resolution of a few µs. The method is based on periodic excitation of the sample and phase locked modulation of the beam intensity by one radio frequency spin flipper, and requires a position sensitive neutron detector with time resolution also in the order of 1 µs. The output are time resolved reflectivity curves locked to the...

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Daniyar Berikov
12/7/21, 1:15 PM
Nuclear, Particle, and Astrophysics
Talk

T-odd effects in fission of heavy nuclei have been extensively studied during more than a decade in order to study the dynamics of the process. A collaboration of Russian and European institutes discovered the effects in the ternary fission in a series of experiments performed at the ILL reactor (Grenoble) [1-3] and the effects were carefully measured for a number of fissioning nuclei. The...

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Oleg Rivin (Nuclear Research Center - Negev (ISRAEL))
12/7/21, 2:05 PM
Quantum Phenomena
Talk

Neutron diffraction is used to establish room temperature magnetic ordering within a laminar, MAX phase material, for the first time. This finding is the first "building block" within our search for 2D magnetic materials. A coexistence between FM and antiferromagnetic (AFM) ordering is found at 1.5 K, in agreement with previous DFT calculations.

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Johanna K. Jochum
12/7/21, 5:05 PM
Neutron Methods
Talk

The MIEZE technique relies on a fast sinusoidal neutron intensity modulation up to the MHz range, generated by the rotation of the neutron spin in radio-frequency spin flippers, and subsequent conversion to an intensity modulation by a spin analyzer.
This intensity modulation is washed out due to the neutron velocity dispersion.
By carefully choosing the rotation frequencies as well as the...

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Johannes Mitteneder
12/7/21, 2:05 PM
Positrons
Talk

Positron annihilation lifetime spectroscopy (PALS) is a powerful tool for defect detection and characterization in material science. To investigate inhomogeneous defect distributions, e.g. close to fatigue cracks or dispersive alloy, with PALS a monochromatic pulsed positron beam of variable energy with a diameter in the range of 1 µm and a pulse width of 150 ps FWHM is needed. To this aim the...

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Charlotte Fritsch
12/7/21, 1:40 PM
Structure Research
Talk

We investigated why commercial Li7La3Zr2O12 (LLZO) with Nb- and Ta substitution shows very low mobility on a local scale, as observed with temperature-dependent NMR techniques, compared to Al and W substituted samples, although impedance spectroscopy on sintered pellets suggests something else: conductivity values do not show a strong dependence on the type of substituting cation. We observed...

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Yaroslav Filinchuk (Université catholique de Louvain)
12/7/21, 9:05 AM
Structure Research
Talk

In this presentation I will show examples of using in situ powder diffraction to simultaneously access the structure and adsorption properties of a small pore crystalline solid. (Quasi)-equilibrium isotherms and isobars can be built directly from sequential Rietveld refinements, both on adsorption and desorption, thus addressing the hysteresis and kinetics of gas adsorption/desorption....

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Klaus Habicht (Helmholtz-zentrum Berlin für Materialien und Energie)
12/7/21, 4:15 PM
Quantum Phenomena
Talk

The model perovskite SrTiO$_{3}$ is well-known for its strongly anharmonic phonon properties underlying the intriguing physics of soft phonon modes. A plethora of unusual thermal transport properties derive from the interplay of ferroelectricity, phonon softening, quantum fluctuations and topological properties, including Poiseuille flow of phonons and the elusive coupling of phonons in...

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Darren Peets (Technische Universität Dresden)
12/7/21, 4:15 PM
Structure Research
Talk

Since the discovery of charge disproportionation in the FeO$_2$ square-lattice compound Sr$_3$Fe$_2$O$_7$ by Mössbauer spectroscopy more than fifty years ago, the spatial ordering pattern of the disproportionated charges has remained “hidden” to conventional diffraction probes, despite numerous x-ray and neutron scattering studies. We have used neutron Larmor diffraction and Fe $K$-edge...

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Walter Richtering (RWTH Aachen)
12/8/21, 9:30 AM
Plenary
Plenary talk

Microgels are macromolecular networks swollen by the solvent they are dissolved in. They are unique systems that are distinctly different from common colloids, such as, e.g., rigid nanoparticles, flexible macromolecules, micelles or vesicles. When swollen, they are soft and have a fuzzy surface with dangling chains and the presence of cross-links provides structural integrity - in contrast to...

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Lucian Mathes
12/7/21, 9:55 AM
Positrons
Talk

We developed a new analysis tool for positron depth profiles generated by variable energy Doppler-broadening spectroscopy. It allows users to extract positron diffusion lengths by fits to the S parameter measured as a function of implantation energy. The code written in Python is easily accessible and adaptable. In this talk we present the theoretical background of the algorithm implemented,...

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Dmytro Inosov (TU Dresden)
12/7/21, 9:05 AM
Quantum Phenomena
Invited talk

The quantum spin systems Cu2MBO5 (M = Al, Ga) with the ludwigite crystal structure consist of a structurally ordered Cu2+ sublattice in the form of three-leg ladders, interpenetrated by a structurally disordered sublattice with a statistically random site occupation by magnetic Cu2+ and nonmagnetic Ga3+ or Al3+...

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Earl Babcock
12/7/21, 1:40 PM
Nuclear, Particle, and Astrophysics
Talk

The pseudomagnetic precession of neutrons in polarized nuclei is caused by the incoherent neutron scattering cross section and leads to a real spin rotation of polarized neutrons. This precession however does not come from “magnetic fields” but directly from scattering at the nucleus. The pseudomagnetic precession of 3He is itself of high for few-body nuclear effective field theories to test...

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Ms Liubov Azarova (Saint Petersburg State University, 199034 Saint Petersburg, Russia)
12/7/21, 5:05 PM
Quantum Phenomena
Talk

Amorphous magnetic materials are of considerable interest, both from a fundamental and applied point of view. The low coercive field in an amorphous magnet is an important property for its application as a core material in electrical transformers. The structural and magnetic properties of amorphous magnetic systems can be quite complex. The presence of structural as well as magnetic disorder...

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Dr Kun-kun Deng (Taiyuan University of Technology)
12/7/21, 2:05 PM
Material Science
Talk

Magnesium alloys have the advantages of low density, high specific strength and specific stiffness, so they have been widely used in many fields, such as aerospace, aerospace, automobile and electronic products, etc [1,2]. However, the application of magnesium alloys is limited because of the low modulus, low strength and poor plasticity at room temperature. In recent years, it has been found...

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Martin Müller (Helmholtz-Zentrum Geesthacht) , Peter Müller-Buschbaum (TU München, Physik-Department, LS Funktionelle Materialien)
12/8/21, 9:00 AM
Plenary talk
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Frank Weber (Karlsruhe Institute of Technology)
12/7/21, 4:40 PM
Quantum Phenomena
Talk

Nematicity is ubiquitous in electronic phases of high-$T_c$ superconductors, particularly in the Fe-based systems. We used inelastic neutron and x-ray scattering to extract the temperature-dependent nematic correlation length $\xi$ from the anomalous softening of acoustic phonon modes in Ba(Fe$_{1-x}$Co$_x$)$_2$As$_2$ and FeSe. In all cases, we find that $\xi$ is well described by a power law...

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Dr Jose Manuel Gomez Guzman (Technische Universität München Heinz Maier-Leibnitz Zentrum (MLZ))
12/7/21, 9:55 AM
Neutron Methods
Talk

In the last two years we improved our understanding of sputtering process parameters leading to (Ni,Ti) supermirror coatings with reduced mechanical stress and higher reflectivity. This knowledge has been applied to the case of non-depolarizing m=2 (Cu,Ti) supermirrors, which have been successfully prepared with the standard DC magnetron sputtering facility of the FRM II neutron optics group....

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Sebastian Gruber (TUM)
12/7/21, 1:15 PM
Neutron Methods
Invited talk

The preservation of food is one of the most important tasks in food processing. A typical application is lyophilisation or freeze drying and refers to the sublimation of ice to vapour below the triple point. Lyophilisation is employed for dehydrating biopharmaceuticals and high-value foods in frozen state as the structural and nutritional attributes are not affected by the process in contrast...

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Dr Adrian Losko (Heinz Maier-Leibnitz Zentrum)
12/7/21, 2:05 PM
Neutron Methods
Talk

Recently developed event-driven detectors are capable of registering spots of light induced by neutron interactions in scintillator materials. Reconstructing the Center-of-Mass of the individual interactions, it is possible to significantly enhance spatial and temporal resolution of recorded radiographs. Utilizing this principle, we present a detector capable of Time-of-Flight imaging with an...

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Gideok Kim (Center for integrated nanostructure physics)
12/7/21, 1:40 PM
Quantum Phenomena
Talk

Transition metal oxides display versatile magnetic phenomena that are mediated by various exchange mechanisms thanks to the localized d-electrons Perovskite manganese oxides (manganates) are archetypal examples of such magnetic transition metal oxides. In manganates, the super-exchange and double-exchange interactions play a major role in determining the magnetic phase. The relative strength...

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Dr Ekaterina Iashina (Petersburg Nuclear Physics Institute NRC KI)
12/7/21, 1:15 PM
Soft Matter
Talk

The small-angle neutron scattering (SANS) on the rat lymphocyte nuclei demonstrates the bi-fractal nature of the chromatin structural organization. The measurements were carried out at the KWS-3 instrument in the momentum transfer range $[ 10^{-3} - 9 \cdot 10^{-2}]$ nm$^{-1}$ and at the KWS-2 instrument in the momentum transfer range $[9 \cdot 10^{-2} - 2]$ nm$^{-1}$ at MLZ, Garching,...

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Prof. Tommy Nylander (Lund University)
12/7/21, 4:15 PM
Soft Matter
Talk

We report a new, simplified approach for analysis of grazing incidence scattering
measurements used to investigate supported lipid bilayers on hexagonal arrays of
nanowires. The method exploits measurements of different physical structures or different scattering contrasts in studies of a fixed array of nanowires. The ratio of the intensity at peaks can be calculated for models simply as a...

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Prof. Rajeev Ranjan (Indian Institute of Science Bangalore. India)
12/7/21, 2:05 PM
Structure Research
Talk

The structural complexities in the Na0.5Bi0.5TiO3 (NBT)-based Pb-free piezoelectrics pose significant challenge regarding understanding of the structure-property correlation. While the critical compositions exhibiting maximum weak-signal piezoelectric response is generally associated to an inter-ferroelectric instability, a combined neutron diffraction and piezoelectric study on three...

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Dr Jens Gibmeier (Karlsruher Institut für Technologie, IAM-WK)
12/7/21, 4:15 PM
Material Science
Talk

Process-induced residual stresses (RS), which are induced as a result of plastic deformation, can lead to plastic anisotropy effects caused by intergranular strains. The strict application of diffraction elastic constants (DEC) to calculate phase-specific RS, as tabulated for many material phases in literature, can lead to arguably erroneous RS calculations. These plastic anisotropy effects...

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Dr Frank Kuemmel (Heinz Maier-Leibnitz Zentrum (MLZ), TU München)
12/7/21, 4:40 PM
Material Science
Talk

The goal of the BMBF funded project HiMat is the optimization of an innovative testing machine to perform deformation experiments at high temperatures at various instruments at the research neutron source Heinz Maier-Leibnitz. With diffraction, small-angle scattering and radiography (tomography) it is possible to investigate forming phases, their volume fractions as well as size and shape,...

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Niels Geerits (TU Wien, Atominstitut)
12/7/21, 2:05 PM
Nuclear, Particle, and Astrophysics
Talk

During the 1970s parity non-conserving spin rotations where first observed in the neutron nucleus weak interaction [1]. In these experiments transversally polarized neutrons were passed through certain nuclear targets, upon which the neutron spin was rotated around the flight direction. Due to the conservation of total angular momentum this spin rotation has to be compensated in some manner....

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Dr Alexander Evans (Bundesanstalt für Materialforschung und –prüfung (BAM))
12/7/21, 1:15 PM
Material Science
Talk

Metal Additive manufacturing (AM) technologies such as Laser Powder Bed Fusion (LPBF) enable the fabrication of complex structures, giving rise to potential improvements in component and manufacturing efficiency. However, the processes are typically characterized by the generation of high magnitude residual stresses which can have detrimental consequences for subsequent applications....

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Martin Singer (IPP)
12/7/21, 5:05 PM
Positrons
Talk

To form an electron-positron plasma in the 10L volume of a levitated dipole, large numbers of low-energy positrons are needed. The APEX (A Positron Electron eXperiment) collaboration plans to use a combination of multiple Penning-Malmberg traps for the accumulation of such large numbers, which will be installed at the NEPOMUC facility.
In this contribution we introduce the high-field...

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Christine Papadakis (Technische Universität München, Physik-Department, Fachgebiet Physik weicher Materie)
12/7/21, 5:05 PM
Soft Matter
Talk

Upon heating through the cloud point, poly(N-isopropylacrylamide) (PNIPAM) in aqueous solution forms long-lived dispersions of mesoglobules. At atmospheric pressure, these mesoglobules are small and strongly dehydrated, and their further growth and coalescence are hindered by the viscoelastic effect. On the contrary, at high pressures, large, water-rich aggregates are formed by PNIPAM [1]....

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Matthew Stoneking (Lawrence University)
12/7/21, 4:15 PM
Positrons
Talk

A Positron-Electron eXperiment (APEX) aims to produce a magnetically confined, low temperature positron-electron plasma in order to test predictions that such a system with equal mass but oppositely charged species, in contrast to nearly all laboratory and astrophysical plasma, is remarkably stable and exhibits other unique plasma characteristics. The magnetic trap consists of a levitated...

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Laura Guasco
12/7/21, 9:05 AM
Neutron Methods
Talk

The study of hydrogen diffusion and storage in different materials is crucial in the challenge of an actual implementation of sustainable energy sources, but also to explore the possible modification of electronic, magnetic and optical properties of the host materials. Due to high sensitivity of neutrons to hydrogen atoms, neutron scattering techniques have been successfully used for many...

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Christian Felder
12/8/21, 4:05 PM
Plenary
Plenary talk

The COVID-19 crisis has created new challenges worldwide. On the plus side, it has been a catalyst for digitalization, also at the MLZ. Besides providing remote access to our instrument control- and data analysis systems, online training has become increasingly important. In January 2021, the first lab course with students were carried out online, using so-called Digital Twins. A Digital Twin...

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David Knežević
12/7/21, 9:30 AM
Nuclear, Particle, and Astrophysics
Talk

The quality of a number of areas that use nuclear data, such as astrophysical reactions, production of medical isotopes and rare isotope beams, and reactor technology is dependent on the accurate values for gamma ray transitions, level scheme, nuclear level density and radiative strength function. One of the most suitable techniques for the determination of these parameters is the two-step...

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Dr Rajesh Dutta (Institut für Kristallographie, RWTH Aachen University)
12/7/21, 5:05 PM
Structure Research
Talk

Multiferroic Ba$_{2}$CoGe$_{2}$O$_{7}$ belongs to the square lattice Heisenberg antiferromagnets (SLHAF), which exhibit rich quantum phase diagrams of exchange interactions, Dzyaloshinskii-Moriya interactions with the external magnetic or electric fields, but the correlation between single-ion anisotropy and the magnetic field has remain hitherto unexplored through experimental findings in...

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Prof. Thomas Hellweg (Universität Bielefeld, PCIII)
12/7/21, 2:05 PM
Soft Matter
Talk

This study investigates the role of charged lipids in the plasma membrane with respect to the interaction of the antiviral saponin glycyrrhizin with such membranes. Glycyrrhizin is a natural triterpenic-based surfactant found in licorice. Vesicles made of 1,2-dioleoyl-sn-glycero-3-phospho-rac-(1’-glycerol) (DOPG)/glycyrrhizin are characterized by small-angle scattering with neutrons and X-rays...

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Bastian Märkisch (Physik-Department, TUM)
12/7/21, 4:15 PM
Nuclear, Particle, and Astrophysics
Talk

For the PERC Collaboration.

The Proton Electron Radiation Channel (PERC) instrument aims to measure several observables in neutron decay with unprecedented precision. It will serve to determine parameters within the Standard Model of particle physics and to search for novel scalar and tensor interaction beyond it. Together with precision measurements of the neutron lifetime, results will be...

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Dr Lucas Kreuzer (1MLZ (FRM II, TUM), 2Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR))
12/7/21, 9:55 AM
Material Science
Talk

CuTi-based glass forming alloys feature a large undercooled liquid region and a high glass-forming ability, which makes them interesting materials particularly for biomedical and lightweight applications. However, for the development of alloy compositions with optimized glass-forming abilities, the relevant mechanisms on the atomic scale are still to be explored. For a fundamental...

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Viktor Petrenko (BCMaterials. Basque center for materials, applications & nanostructures)
12/7/21, 9:55 AM
Soft Matter
Talk

It is well known, the properties of magnetic fluids can be controlled by external magnetic field. However, inhomogeneous distribution of magnetic particles in non-polar ferrofluids was observed recently under external electric fields and formation of large aggregates was concluded in such systems. It was shown that aggregation process depends on the magnitude of the DC electric field, and in...

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Prof. Akira Uedono (University of Tsukuba)
12/7/21, 9:05 AM
Positrons
Talk

Gallium nitride (GaN) and related alloys [(AlGaIn)N] are promising materials for next generation power electronics. For GaN, for example, because of its wide bandgap, high saturation electron velocity, sufficient thermal conductivity, and high breakdown voltage, it yields a higher figure of merit compared with that of other semiconductors for power devices such as Si and SiC. The presence of...

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Daniel Sørensen (MLZ)
12/7/21, 9:55 AM
Structure Research
Talk

A custom-made, multilayered Li-ion battery pouch cell was investigated using operando neutron powder diffraction (NPD) and spatially resolved powder X-ray diffraction (SR-PXRD) with the aim of comparing the information obtained from the two complementary techniques. The work focused on the anode and cathode lithiation as obtained from the LiC6/LiC12 weight ratio and the NMC111 c/a-ratio,...

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Erwin Jericha
12/7/21, 9:05 AM
Nuclear, Particle, and Astrophysics
Talk

We report on experimental tests of the neutron magnetic spin resonator MONOPOL with very cold neutrons. When placed between two supermirror neutron polarizers and operated in a pulsed traveling-wave mode, it allows to decouple time- and wavelength-resolution and can therefore be used simultaneously as electronically tunable monochromator and fast beam chopper. As a first ‘real’ scientific...

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Ricardo Helm (Universität der Bundeswehr München)
12/7/21, 1:40 PM
Positrons
Talk

The Pulsed Low-Energy Positron System PLEPS [1] is a user facility for defect depth-profiling by means of positron lifetime measurements with a monochromatic pulsed positron beam of variable energy ranging from 0.5-21 keV at the intense positron source NEPOMUC at the MLZ in Garching [2].
To further extend the scope of defect characterization of PLEPS various possibilities of in-situ...

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Sergio Soria (FRM II)
12/7/21, 5:05 PM
Material Science
Talk

Zr based alloys are widely used in nuclear power plants as nuclear fuel cladding. These materials have an excellent combination of mechanical resistance, corrosion resistance and very low neutron absorption. However, they are susceptible to H degradation, following incorporation of H by a slow oxidation process at operating temperatures (~300°C). For long operational service, Zr based...

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Franz Xaver Haslbeck (Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften)
12/7/21, 9:30 AM
Quantum Phenomena
Talk

Novel electronic phases such as nematic electronic textures or unconventional superconductivity (SC) are frequently observed near zero-temperature magnetic instabilities that arise as a function of a non-thermal control parameter such as pressure. Although it is widely believed that the abundant magnetic fluctuations associated with these quantum phase transitions (QPT) are at the origin of...

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Lisa Fruhner (JCNS-1, Forschungszentrum Jülich GmbH)
12/8/21, 4:25 PM
Plenary
Plenary talk

Neutron scattering experiments involving soft matter materials often require specific contrast to observe different parts of the materials. In order to increase the availability of deuterium labelled materials, we are currently establishing deuteration support to MLZ users. Our main synthetic focus at the JCNS-1 is in the area of polymers and ethoxylation (e.g. surfactants). We have recently...

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Francesco Guatieri (Università degli Studi di Trento)
12/7/21, 1:15 PM
Positrons
Talk

Low-energy positron beams can only be handled inside of high vacuum chambers. As ordinary electronic construction relies on a suite of materials which is not compatible with ultra-high vacuum it is necessary for conventional electronics to be installed on the outside of experimental chambers and beamlines. In this talk we'll showcase our most recent endeavors in overcoming this limitation by...

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Daniele Cangialosi
12/7/21, 9:05 AM
Soft Matter
Invited talk

The vibrational density of state (VDOS) of the most stable crystal of a given species follows the prediction of the Debye model. In contrast, glasses generally exhibit excess in the VDOS visible as a bump in the meV range and widely known as the boson peak. Its magnitude depends on the thermodynamic state of the glass. Specifically, the magnitude of the boson peak scales with the entropy and...

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Prof. Joao Cabral (Imperial College London)
12/8/21, 1:15 PM
Plenary
Plenary talk

Highly crosslinked polyamide (PA) membranes are extensively used in water purification and desalination by reverse osmosis (RO). The talk will present an overview of our recent work on the structure and dynamics of PA membranes, with a combination of neutron and X-ray reflectivity, and neutron spectroscopy. The membranes were synthesised by established interfacial polymerisation routes of...

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Bastian Märkisch (Physik-Department, TUM)
12/7/21, 9:00 AM
Nuclear, Particle, and Astrophysics
Talk
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Ralph Gilles
12/7/21, 9:00 AM
Material Science
Talk
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Peter Link
12/7/21, 9:00 AM
Neutron Methods
Talk
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Robert Georgii
12/7/21, 9:00 AM
Quantum Phenomena
Talk
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Henrich Frielinghaus (JCNS)
12/7/21, 9:00 AM
Soft Matter
Talk
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Anatoliy Senyshyn
12/7/21, 9:00 AM
Structure Research
Talk
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Christoph Hugenschmidt
12/7/21, 9:00 AM
Positrons
Talk
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Dr Neelima Paul (Technical University of Munich, Heinz Maier-Leibnitz Zentrum (MLZ))
12/7/21, 9:05 AM
Material Science
Talk

Lithium metal batteries are next generation energy storage devices that rely on the stable electrodeposition of lithium metal during the charging process. In this work, we investigate the effect of polymer dynamics on lithium metal deposition. For this, we design electrolyte (solvent) blocking perfluoro polyether polymer networks with evenly spaced H-bonding sites of various strengths,...

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Xiaohu Li (FRM2, Physik, TU München)
12/7/21, 10:30 AM
Material Science
Poster

Austempered ductile iron (ADI) is an attractive material with excellent mechanical properties, like high strength, good ductility, wear resistance and fatigue strength. Its mechanical properties are largely determined by the ausferritic microstructure which contains retained high carbon enriched austenite. The retained austenite will become unstable under plastic deformation and will transform...

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Xiaohu Li (Forschungs-Neutronenquelle FRM II)
12/8/21, 10:30 AM
Material Science
Poster

A modified quenching and deformation dilatometer (TA instruments DIL 805A/
D/T) is now in operation at the Heinz Maier-Leibnitz Zentrum (MLZ, Germany)
neutron center. It is customized for running neutron scattering measurements
during the temperature/deformation treatment of the sample, in particular
neutron diffraction (phase, texture, and lattice strain) and neutron small...

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Shanshan yin
12/7/21, 10:30 AM
Material Science
Poster

Mesoporous Fe2O3 thin films with large area homogeneity demonstrate tremendous application potential in photovoltaic industry, lithium ion batteries, gas or magnetic sensors. In the present work, the synthesis of morphology‐controlled Fe2O3 thin films is realized with the polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) diblock copolymer assisted sol-gel chemistry. The effect of the solvent...

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Dr Yajuan Li (Technical University of Munich)
12/7/21, 10:30 AM
Material Science
Poster

Molybdenum Nitride (MoNx) films are investigated as hole-selective layer of crystal Si solar cells due to having a proper work function (5.62 eV) and high conductivity (2000 S/cm). The hole-selectivity so far is limited by the poor surface passivation, which is highly correlated to the interface structure between Si and MoNx. The open circuit voltage and fill factor of devices with thicker...

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Mr Jungui Zhou (Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, P. R. China; LS Funktionelle Materialien, Physik-Department, TU München, 85748 Garching, Germany)
12/7/21, 10:30 AM
Material Science
Poster

Metal halide perovskite light-emitting diodes (PeLEDs) are regarded as alternative candidates for next-generation display technologies due to their high efficiency, superior color purity and tunable bandgap. However, PeLEDs based on isotropic perovskite emitting layers with randomly oriented emissive transition dipole moments (TDMs) remain to be inefficient to get upper limit efficiencies of...

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Xinyu Jiang (Technische Universität München Fakultät für Physik)
12/7/21, 10:30 AM
Material Science
Poster

Non-fullerene organic solar cells have undergone significant improvements via both, synthesis of novel organic synthesis materials and application of easy fabrication methods. However, device degradtion is still a major problem. For example, the peeling-off of the top electrode fabricated by thermal evaporation leads to an intrinsic device degradation, which is one ofamong the main reasons for...

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Nikolay Antropov
12/7/21, 10:30 AM
Quantum Phenomena
Poster

In the present work authors studied magnetic and structural properties of Fe/Pd/Gd superlattices. The particular system [Fe(35 Å)/Pd(t)/Gd(50 Å)/Pd(t)]x12 was chosen with different layer thicknesses of Pd spacer.
By means of x-ray low-angle diffraction (reflectometry, XRR) and scanning transmission electron microscopy (STEM) with the energy dispersive x-ray (EDX) microanalysis the structural...

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Liz Margarita Montanez Huaman
12/7/21, 10:30 AM
Quantum Phenomena
Poster

Multilayers composed of heavy metals and ferromagnets with strong perpendicular anisotropy are potential candidates for magnetic memory applications [1,2]. Magnetic skyrmions in particular may enable ultra-dense storage devices due to their extremely low spin currents [2]. Pt/Co-based multilayers generally exhibit worm domains, which can nucleate into domains of skyrmions through...

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Ms Elena Yakunina (Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences)
12/7/21, 10:30 AM
Quantum Phenomena
Poster

Layered Fe/MgO/Cr/MgO/Fe nanostructures are an artificial ferromagnetic material in which the exchange interaction of magnetic moments of Fe layers through intermediate dielectric and metal layers can lead to magnetic configurations that are not realized in the well-studied Fe/MgO/Fe and Fe/Cr/Fe systems. The correlation between the structural and magnetic properties of layered Fe(10...

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Daria Skanchenko (NRC «Kurchatov Institute» - PNPI)
12/7/21, 10:30 AM
Quantum Phenomena
Poster

The creation of extreme conditions on the sample by means of high external pressure together with changes in the magnetic field and temperature allows to obtain the comprehensive amount of experimental data for a detailed description of the internal properties of materials.
We investigated the Mn$_{1-x}$Fe$_{x}$Ge compounds, which crystallize into a noncentrosymmetric cubic structure of the...

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Mr Baolin Wu (RWTH Aachen University; Forschungszentrum Jülich (IEK-9))
12/7/21, 10:30 AM
Neutron Methods
Poster

The solid electrolyte interphase (SEI) is a solid protective barrier that forms at the surface of lithium-ion batteries (LIB) operating outside the stability range of the electrolyte. In particular, that happens at the anode where Li metal reduces the liquid electrolyte forming a solid mixture of inorganic and organic components during the lithiation reaction [1]. A good barrier layer...

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Igor Graf von Westarp
12/7/21, 10:30 AM
Soft Matter
Poster

The myelin basic protein (MBP) is a key player when it comes to the formation of tight membrane wrapping around vertebrate’s nerve cells. In physiological conditions, MBP is acting as a glue that stacks multiple myelin layers to build up an insulating sheath which covers axons. To accomplish this task, MBP undergoes a so-called Liquid-Liquid Phase Separation (LLPS) - a property which has...

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Nian Li
12/7/21, 10:30 AM
Material Science
Poster

With an aim of obtaining high-efficient titania photoanodes, we introduce germanium nanocrystals (GeNCs) into a diblock-copolymer polystyrene-block-polyethylene oxide (PS-b-PEO) template-assisted sol-gel synthesis. The surface and inner morphologies of the TiO2/GeNC films with different GeNC content after thermal annealing are investigated via scanning electron microscopy and grazing incidence...

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Friederike Gräbitz-Bräuer
12/7/21, 10:30 AM
Soft Matter
Poster

The saponin aescin can be extracted from the horse chestnut tree and is known for its anti-inflammatory and anti-oedematous properties. Using small, unilamellar lipid vesicle (SUV) as model membrane, we study the mixing properties of aescin with the phospholipid 1,2-dioleoyl-sn-glycero-3-phospho-(1’-rac-glycerol) (DOPG) by using small-angle neutron scattering (SANS), small- and wide-angle...

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Constantin Harder (DESY & TUM)
12/7/21, 10:30 AM
Soft Matter
Poster

Layer formation and annealing of nanoparticles especially colloidal inks applied to porous materials is very relevant for functional coatings and printing. The goal is to distinguish and quantify the differences in structure formation during annealing of deposited colloidal inks on a porous and a solid material. Therefore, we compare two different substrates: As porous template we use a layer...

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Fabian Alexander Christian Apfelbeck (1 Technische Universität München, Fakultät für Physik, Lehrstuhl für Funktionelle Materialien, James-Franck-Str.1, 85748 Garching, Germany)
12/7/21, 10:30 AM
Soft Matter
Poster

Lithium-Ion Batteries turned out as an indispensable energy supplier in modern society which however suffers from safety concerns due to the flammability of the liquid electrolyte. Solid polymer electrolytes (SPEs) can bypass this obstacle and therefore represent a serious alternative to conventional electrolytes. Especially single-ion conducting polymers (SICPs), which have the anion...

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Leon Chryssos
12/7/21, 10:30 AM
Positrons
Poster

The Coincidence Doppler-Broadening (CDB) spectrometer at NEPOMUC has recently been upgraded with six additional HPGe Detectors, bringing the total number of detectors to ten. To take full advantage of the even more capable instrument a novel data evaluation software package (STACS) was created.

The software can handle and visualize the data generated by Coincidence Doppler-Broadening...

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Dr Stefan Strangmüller (Forschungsneutronenquelle Heinz Maier-Leibnitz (FRM II))
12/7/21, 10:30 AM
Structure Research
Poster

High-performance energy storage solutions are a basic prerequisite for efficient portable devices and the electrification of the transport sector, and by this reaching the CO$_{2}$ emission targets. The market and progress demand for advances in electrochemical energy storage and a promising approach towards advanced batteries is the so-called all solid state battery concept, where the liquid...

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Dominik Petz
12/7/21, 10:30 AM
Structure Research
Poster

Electrochemical cycling of lithium-ion batteries is supplemented by the active transport of lithium ions and electrons, which are exchanged between the cathode and anode material. Besides material properties, such exchange is facilitated by cell parameters like electrode dimensions and geometry, current density, temperature, pressure, reaction rate etc. Such parameters are neither uniformly...

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Sebastian Biesenkamp (II. Physikalisches Institut, Universität zu Köln)
12/7/21, 10:30 AM
Structure Research
Poster

Due to their application potential for new types of memory devices, the research on multiferroic materials has attracted strong interest during the last decades. A prominent mechanism that drives multiferroic behavior is given by the inverse Dzyaloshinskii-Moriya interaction, which yields the shift of a non-magnetic ligand ion due to a non-collinear magnetic structure. It was shown on a...

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Guangjiu Pan (Lehrstuhl für Funktionelle Materialien, Physik-Department, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany)
12/7/21, 10:30 AM
Material Science
Poster

A low-temperature routine to realize inorganic amorphous electron-transport layers (ETLs) is of great importance for the commercialization of perovskite solar cells. The fabrication of ETLs at low temperature is energy saving and compatible with flexible substrates. In this work, titanium thin films are synthesized at low temperature (below 100 ℃) with a polymer template sol-gel method based...

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Mr Julian E. Heger (TUM Physik E13)
12/8/21, 10:30 AM
Soft Matter
Poster

Interfaces based on metal oxides play a major role in functional materials for energy applications. For example, TiO2 can serve as a photocatalyst in the production of hydrogen or as an anode material in emerging solar cell and battery technologies. In most applications, a designed structure is highly de-sired to fulfill performance conditions on different length scales. Moreover, devices...

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Volker Körstgens (TU München)
12/8/21, 10:30 AM
Soft Matter
Poster

For the mechanical characterization of the adhesive bond of pressure-sensitive adhesives one has to take into account the geometry of the adherents and the kind of stress applied. We present a technique, which is especially adapted for the measurement of tack for assemblies of fibers coated with pressure-sensitive adhesives using customized cylindrical composite stamps [1]. Key element of the...

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Lukas Grossmann
12/7/21, 10:30 AM
Material Science
Poster

The new project CAESAR funded by the Bundesministerium für Wirtschaft und Energie (BMWi) is a cooperation of the Technical University Munich (TUM) including the FRM II and several industrial partners under the leadership of the company Wacker. The aim of this project is the development of Li ion batteries (LIB) with increased specific energy (Wh/kg) and energy density (Wh/l) accompanied by a...

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Anastasiia Kuznetsova (WPN Hereon Garching branch)
12/7/21, 10:30 AM
Structure Research
Poster

There are various methods for diffraction pattern calculation of powders, differing in Q-averaging procedures. Three of these were studied in detail: (1) The structure factor formula sums up all the hkl planes for a Q-vectors despite their respective orientations. Only peak intensities are calculated and the peak shape is arbitrary. (2) A Monte Carlo (MC) method of averaging used i.a. by the...

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Tobias Hölderle
12/7/21, 10:30 AM
Structure Research
Poster

Nowadays, 2H graphites are the most common anode materials in LIBs. Despite its overall popularity, the performance of LIBs is still limited by the capability of graphite electrodes to store lithium ions in its structure. Graphite builds up a layered hexagonal structure. During charging and discharging lithium ions are reversibly incorporated in the hexagonal structure resulting in the...

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Cecilia Solis
12/7/21, 10:30 AM
Material Science
Poster

In order to improve the microstructure and mechanical properties of newly developed Ni-base superalloy VDM® Alloy 780 it is necessary to understand the $\gamma$’ hardening phase precipitation process. Here the precipitation process was studied in-situ by time-of-flight (TOF) neutron diffraction (ND) and small-angle neutron scattering (SANS) experiments at high temperature, which allowed us to...

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Manuel Lebert (Technical University Munich)
12/8/21, 10:30 AM
Nuclear, Particle, and Astrophysics
Poster

The PERC facility is currently under construction at the MEPHISTO beamline of the FRM II. It will serve as an intense and clean source of electrons and protons from neutron beta decay for precision studies. It aims to improve the measurements of the properties of weak interaction by one order of magnitude and to search for new physics via new effective couplings.
PERC's central component is...

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Suzhe Liang (Physical Department, TUM)
12/8/21, 10:30 AM
Material Science
Poster

Au/TiO2 nanohybrid materials have attracted significant attention due to the outstanding optical, photocatalytic and photovoltaic performance. We use customized polymer templating to achieve TiO2 nanostructures with different morphologies. Au/TiO2 hybrid thin films are fabricated by sputter deposition. An in-depth understanding of the Au morphology on the TiO2 templates is achieved with in...

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Kostiantyn Sakhatskyi (ETH Zurich, Empa)
12/8/21, 10:30 AM
Material Science
Poster

Fast neutrons offer high penetration capabilities for both light and dense materials due to their comparatively low interaction cross-sections, making them ideal for the imaging of large-scale objects such as as-built plane turbines, for which X-rays or thermal neutrons do not provide sufficient penetration. However, inefficient fast neutron detection limits the widespread application of this...

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Mr Thien An Pham (TU München, Heinz Maier-Leibnitz Zentrum (MLZ))
12/8/21, 10:30 AM
Material Science
Poster

Metal alloys as anode material for lithium ion batteries such as LiAl offer a high theoretical capacity in relation to their low cost. Compared to the conventional graphite anode, aluminium has an almost three times higher specific capacity with 993 mAh/g. During lithiation, aluminium first forms a solid solution with lithium called the alpha-LiAl phase until the solubility limit is reached....

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Ivana Pivarníková
12/8/21, 10:30 AM
Material Science
Poster

The sodium superionic conductor (NASICON) materials have been a widely studied class of solid electrolytes for Na-ion based all-solid-state batteries due to their high conductivity and facile synthesis conditions. The aim of this work is to elucidate the reason for extremely high conductivity exhibited by some compositions, specifically by $\text{Na}{1+x} \text{Zr}{2} \text{Si}_{x}... VC Room link Only available for registered users! Massimo Fritton 12/8/21, 10:30 AM Material Science Poster The new VDM® Alloy 780 is a Ni-based superalloy developed for higher service temperatures than the widely used alloy 718, consisting of γ matrix, γ´ hardening phase, and δ & η high-temperature phases. Depending on the respective heat treatment of VDM® Alloy 780, various microstructures with different phase proportions can be obtained, which determine the mechanical properties of the alloy over... VC Room link Only available for registered users! Huaying Zhong 12/8/21, 10:30 AM Material Science Poster Colloidal quantum dots (CQDs) have generated great interest in various optoelectronic devices because of their size-tunable bandgap, low-temperature solution processability. Lead sulfide (PbS) CQDs, with a strong absorption coefficient and large Bohr radius, enable solar cells to harvest infrared photons of the solar spectrum beyond the absorption edge of crystalline silicon and perovskites.... VC Room link Only available for registered users! Vitalii Kuznetsov (Institut Laue Langevin) 12/7/21, 10:30 AM Material Science Poster With an increase in renewable energy production, the problem of energy storage becomes more and more significant. One of the most promising ideas is storage in form of hydrogen gas, which involves the production of hydrogen by electrolysis and later its reconversion into electricity in fuel cells. It is of great importance for these processes to be carried out most efficiently with the most... VC Room link Only available for registered users! Mr Kun Sun 12/8/21, 10:30 AM Material Science Poster Perovskite solar cells (PSCs) are one of the most promising photovoltaic technologies and reached a certified 25.2% efficiency owing to their tuneable bandgap, high carrier mobility, long diffusion length and so on. The long-term operational stability of PSCs, however, has been not investigated. Herein, we probe the structure change with grazing-incidence small-angle scattering techniques... VC Room link Only available for registered users! Suo Tu (Institute of Functional Materials) 12/8/21, 10:30 AM Material Science Poster The combination of dimethyl sulfoxide (DMSO)-solvent doping and physical-chemical DMSO/salt de-doping in a sequence has been used to improve the thermoelectric (TE) properties of poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) films. A high power factor of ca.105.2 µW m-1 K-2 has been achieved for the PEDOT:PSS film after post-treatment with 10 % sodium sulfite (Na2SO3)... VC Room link Only available for registered users! yuqin zou 12/7/21, 10:30 AM Material Science Poster Yuqin Zoua, Shuai Yuanb, Ali Buyrukc, Johanna Eichhornd, Shanshan Yina, Manual A. Scheela, Tianxiao Xiaoa, Shambhavi Pratapa, Suzhe Lianga, Wei Chena, Christian L. Weindla, Cheng Mub, Ian Sharpd, Tayebeh Americ,&, Matthias Schwartzkopfe, Stephan V. Rothe, f, Peter Müller-Buschbaum*a, g aLehrstuhl für Funktionelle Materialien, Physik-Department, Technische Universität München,... VC Room link Only available for registered users! Yusuf Bulut 12/8/21, 10:30 AM Material Science Poster Gold deposition via high power impuls magnetron sputtering (HiPIMS) allows to coat thin metal layers on heat sensitive materials allowing increased adhesion compared to an evaporated gold layer. In addition, this particular technique allows deposition at a lower deposited thermal energy. However, the low temperature nucleation and growth processes of HiPIMS are not sufficiently known.... VC Room link Only available for registered users! Christoph Lindenmeir 12/8/21, 10:30 AM Material Science Poster In the past few years, perovskite solar cells (PSCs) received a lot of awareness in research due to their low manufacturing cost, high efficiency, and high specific power. For industry, PSCs are very interesting because of their easy solution-based fabrication process and comparable efficiencies with the established c-Si-based solar cells.[1] Thus, the fabrication can be upscaled... VC Room link Only available for registered users! Ting Tian 12/8/21, 10:30 AM Material Science Poster ZnO has received much attention over the past years because it has a wide range of properties, including high transparency, piezoelectricity, wide-bandgap semiconductivity, high electron mobility and low crystallization temperature. To improve the photovoltaic performance of ZnO-based hybrid solar cell devices, an interconnected mesoporous inorganic nanostructure is favorable, which can... VC Room link Only available for registered users! Tianfu Guan 12/8/21, 10:30 AM Material Science Poster Hybrid plasmonic nanostructures have raised great interest for being used in a variety of optoelectronic devices, due to the surface plasmon resonance (SPR). Charge carriers trapped in colloidal quantum dots (QDs) at localized surface defects is a key issue in photodetectors. Self-assembled hybrid metal/quantum dots can couple plasmonics and quantum properties to photodetectors and modify... VC Room link Only available for registered users! TIANXIAO XIAO (Physik-Department, Lehrstuhl für Funktionelle Materialien, Technische Universität München) 12/8/21, 10:30 AM Material Science Poster Developing clean energy lies the heart of sustainable development of human society. Triboelectric nanogenerator (TENG) originating from Maxwell’s displacement current is a new type of energy harvester for harnessing ambient mechanical energy based on the coupling of triboelectrification and electrostatic induction effect. Compared with other counterparts, owing to the light-weight, low-cost,... VC Room link Only available for registered users! Zhuijun Xu (Technische Universität München) 12/8/21, 10:30 AM Material Science Poster Rechargeable lithium metal batteries have been recognized one of the most promising energy storage devices due to their superior energy density. However, serious safety concern and poor cyclability are featured originating from uncontrolled lithium dendrite growth and unstable solid electrolyte interface (SEI) layer. One strategy to suppress dendrite growth is surface modification with... VC Room link Only available for registered users! Nicola Jobst (ZSW) 12/8/21, 10:30 AM Material Science Poster Nickel manganese spinel LiNi0.5Mn1.5O4 is considered one of the most promising cathode materials for lithium-ion batteries. On the one hand, this is because of its high energy density due to its high voltage plateau at 4.7 V, and the high rate capability due to its three dimensional diffusion network in the cubic crystal system. On the other hand, this material is interesting because... VC Room link Only available for registered users! Ms Yuxin Liang (Technische Universität München, Fakultät für Physik, Lehrstuhl für Funktionelle Materialien, James-Franck-Str.1, 85748 Garching, Germany) 12/7/21, 10:30 AM Material Science Poster The interest in all-solid-state lithium batteries mainly originates from its high safety and energy density compared with conventional Li-ion batteries. Solid polymer electrolytes (SPEs) as an essential component with high durability, long shelf life, high energy density, great flexibility for cell design and low weight are considered as the most promising material for next generation... VC Room link Only available for registered users! Sabine Pütter (Jülich Centre for Neutron Science JCNS, Outstation at MLZ, Forschungszentrum Jülich GmbH) 12/8/21, 10:30 AM Quantum Phenomena Poster Thin film samples for neutron investigation can be fabricated with a Molecular Beam Epitaxy (MBE) setup on site. The MBE setup is part of the additional facilities which can be booked in combination with a neutron instrument proposal at MLZ. Discuss your ideas with the thin film lab staff and then write a proposal. There are two options for access: In remote access the thin film staff... VC Room link Only available for registered users! Marina Makarova 12/8/21, 10:30 AM Quantum Phenomena Poster Last years, interest in the Dy/Co system has increased, since it became possible to switch the magnetization of the system without applied magnetic field by means of a femtosecond laser pulses. Important requirements for achieving switchable magnetic films are antiferromagnetic coupling between spins of rare-earth and transition metals and perpendicular magnetic anisotropy (PMA). Therefore, it... VC Room link Only available for registered users! Earl Babcock 12/8/21, 10:30 AM Neutron Methods Poster supper mirror(SM) arrays to greatly reduce stray magnetic fields by using self compensation. This yoke is a minor modification to the typical existing magnetic yokes used for polarized SM arrays, often consisting of rows of very strong permanent magnets, such as NbFeB, arranged on either side between a cavity made of a pair of thick (> 1 cm) soft iron plates. Such configurations can produce... VC Room link Only available for registered users! Veronika Reich (German Engineering Materials Science Center (GEMS) at Heinz Maier-Leibnitz Zentrum (MLZ), Helmholtz-Zentrum Hereon) 12/8/21, 10:30 AM Neutron Methods Poster Molecular dynamics simulations are an important tool in evaluating scattering data. They have a high potential, which is even further increasing with the ever increasing computation power and isn't yet fully exploited. For some systems, reliable simulations are already available that are compatible with measured data. For other systems, however, the agreement between simulation and experiment... VC Room link Only available for registered users! Eros Mossini (Politecnico di Milano) 12/8/21, 10:30 AM Neutron Methods Poster The implementation of decommissioning tasks requires accurate radiological characterization to be accomplished. Often, computational codes are used to complement experimental radiological characterization campaigns. These activation codes need accurate knowledge of elemental composition of non-irradiated materials. Besides determination of most nuclides by the well-established Inductively... VC Room link Only available for registered users! Stephan Roth (DESY / KTH) 12/8/21, 10:30 AM Soft Matter Poster Cellulose nanofibrils (CNF), extracted from wood, are sustainable materials par excellence and used to fabricate high-strength materials. A promising route for fabricating porous CNF films on large scale is spray deposition using water-based technologies; the resulting porous CNF templates are excellent candidates to infiltrate conductive polymers and plasmon-active nanoparticles for... VC Room link Only available for registered users! Christian L. Weindl (TU München, Physik-Department, LS Funktionelle Materialien) 12/7/21, 10:30 AM Soft Matter Poster Latest research has revealed promising results for silicon (Si) and germanium (Ge) as anode materials for lithium-ion batteries (LIBs). Owing to their high energy capacity these two group 14 semiconductors are considered as auspicious alternatives to graphite anodes in LIBs. In this study, we set the goal of synthesizing a porous silicon-germanium structure over a well-known wet chemical... VC Room link Only available for registered users! Peixi Wang (Workgroup Polymer Interfaces, TUM Department of Physics, Technical University of Munich) 12/8/21, 10:30 AM Soft Matter Poster Co-nonsolvency occurs if a mixture of two good solvents causes the collapse or demixing of polymers into a polymer-rich phase in a certain range of compositions of these two solvents. The nonionic thermo-responsive polymer, poly(isopropylmethacrylamide) (PNIPMAM), which features a lower critical solution temperature (LCST) in aqueous solution, has been widely used to investigate its collapse... VC Room link Only available for registered users! Julija Reitenbach 12/8/21, 10:30 AM Soft Matter Poster Thermoresponsive polymer thin films have gained a lot of attention in the past decades due to their attractiveness for a wide range of applications. A variety of polymer showing LCST- or UCST-type behavior are known, and their transition temperatures can be influenced by various factors such as molar mass, end groups, copolymerization, or by the addition of salts. For polymers in aqueous... VC Room link Only available for registered users! Lukas Spanier 12/8/21, 10:30 AM Soft Matter Poster Lately, organic solar cells (OSCs) have gained increasing attention due to their rapidly increas- ing efficiencies as well as the relatively easy scalability in their manufacture. However, their production relies heavily on the use of halogenated solvents, as organic solar cells made with environmentally friendly solvents often suffer from reduced performance, which is associated with the... VC Room link Only available for registered users! Lennart Reb (TUM E13) 12/7/21, 10:30 AM Material Science Poster Large-scale facilities have gained importance for extended characterization methods in the field of material sciences. In particular, structure analysis by highly brilliant X-ray beams is an ideal technique to investigate drying, crystallization, or degradation processes in-situ. These processes require a high time resolution to capture the reaction dynamics, while developments in detector... VC Room link Only available for registered users! Alfons Schulte (University of Central Florida) 12/8/21, 10:30 AM Soft Matter Poster Cooperative dehydration is a major driving force for the demixing transition in poly(N-isopropylacrylamide) (PNIPAM), causing the polymer chains to collapse at the cloud point, followed by aggregation in aqueous solution. The motion of the hydration water is slowed down compared to bulk water and it is crucial in the solvation behavior in the presence of a co-solvent such as methanol. QENS... VC Room link Only available for registered users! Apostolos Vagias (FRM2 / TUM) 12/8/21, 10:30 AM Soft Matter Poster Nanoscale assemblies in water of novel thermoresponsive and double hydrophilic poly(N-isopropylacrylamide)-block-poly(oligo ethylene glycol methyl ether acrylate) (PNIPAM-b-POEGA) copolymers have been investigated by synergy of Fourier transform infrared (FTIR) spectroscopy and small angle neutron scattering (SANS) experiments. By focusing on the influence of temperature as external stimulus... VC Room link Only available for registered users! Ana Brás Würschig (Institute of Physical Chemistry, University of Cologne) 12/8/21, 10:30 AM Soft Matter Poster In this work, we present a combined analysis of small angle neutron scattering (SANS), linear rheology and neutron spin eco (NSE) spectroscopy experiments on the supramolecular association and chain structure of supramolecular polymer blends. These consist of well-defined hydrogenated (H) polymers with a polyethylene oxide (PEO) backbone carrying the directed homocomplementary hydrogen-bonding... VC Room link Only available for registered users! Vladislava Fokina 12/8/21, 10:30 AM Soft Matter Poster Functional nanocomposites are an important class of smart and adaptive materials. They offer a broad application range from sensors through stretchable electronics to energy conversion and human health. Especially, responsive materials which are able to perform self-assembly in different environments (e.g. magnetic field) are in the center of interest. Further developments in this area would... VC Room link Only available for registered users! Dr Stefan Seidlmayer (Technische Universität München, Heinz Maier-Leibnitz Zentrum (MLZ)) 12/8/21, 10:30 AM Structure Research Poster Graphite and materials made of graphite have historically been of huge technological importance due to their manifold interesting properties. High performance lithium-ion batteries (LIBs) typically use graphite-based anode materials. The energy storage is achieved through the reversible reaction of the graphite with lithium ions in an electrochemical intercalation reaction. When the material... VC Room link Only available for registered users! Lukas Link 12/8/21, 10:30 AM Structure Research Poster We are investigating the crystal structure and properties of inverse perovskite nitrides with elpasolite-type superstructures. This superstructure is due to a full or partial ordering of nitrogen atoms and defects on the perovskite$B\$ site. Since nitrogen scatters neutrons much more strongly than X-rays, neutron diffraction measurements of seven compounds with this superstructure were...

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William M Snow (University of Indiana)
12/7/21, 10:30 AM
Nuclear, Particle, and Astrophysics
Poster

We propose to measure a parity-odd asymmetry A in the forward scattering amplitude for neutrons on the p-wave resonance in 139La at 0.73 eV from the correlation k•I, where k is the neutron momentum and I is the spin of the nucleus. One motivation is to take another step towards a future time reversal (T) violation experiment in polarized neutron transmission through polarized 139La [1]. The...

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Renjun Guo (Physics E13, Technical University in Munich)
12/7/21, 10:30 AM
Material Science
Poster

Perovskite solar cells have been the subject of several studies aimed at increasing their operational stability, but few have looked at the underlying degradation mechanisms. The influence of the environment on the performance of devices during operation has been neglected in previous studies [4]. Using synchrotron radiation-based operando grazing-incidence X-ray scattering techniques, we...

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Amina Alic (TUM)
12/7/21, 10:30 AM
Material Science
Poster

The goal of this project was to include a portable Raman spectrometer into the time-of-flight spectrometer TOFTOF. This setup would allow us to measure neutron and Raman spectra of the sample at the same time, under the same conditions and we would be able to vary the temperature of the sample. As the sample evolves with the change of temperature, so does the Raman spectrum and it is important...

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Mr Andrea Vitaloni (Lehrstuhl für Funktionelle Materialien, Physik-Department, Technische Universität München, James-Franck-Straße 1, 85748 Garching, Germany)
12/8/21, 10:30 AM
Material Science
Poster

Perovskite solar cells (PSCs) have attracted increasing attention in research and industry due to their high efficiency, low material cost and simple solution-based fabrication process, which allow the manufacture of thin, flexible photovoltaic modules.
In laboratory devices, the efficiency already exceeds 25% and is comparable with c-Si.[1] However, one of the most important steps towards...