Mr
Florian Jung
(Technische Universität München, Physik-Department, Fachgebiet Physik weicher Materie)
21/06/2017, 10:45
Block copolymers self-assemble into nanostructures. Solvent vapor annealing (SVA) is an efficient method to improve the long-range order or to alter the morphology in block copolymer thin films.
In the present work, SVA is carried out on thin films from a polystyrene-b-poly(dimethyl siloxane) (PS-b-PDMS) diblock copolymer. For annealing, vapor mixtures of toluene and n-heptane were used,...
Christian Stieghorst
(TUM / FRM II)
21/06/2017, 11:00
PGAA and INAA are ideally suited for a panoramic analysis of the elemental composition in various materials. A bundle of advantages make these two methods attractive for archaeometry and cultural heritage, for instance low-destructiveness, straightforward sample preparation and good detection limits for many elements. Due to the fact that PGAA and INAA are complementary for several elements, a...
Dr
Alexandros Koutsioumpas
(JCNS)
22/06/2017, 09:15
Neutron reflectometry is one of the most powerful methods for investigating the structure of model lipid membranes. These model systems are more easily prepared and experimentally controlled than natural lipid membranes, which are an important integral part of animal and plant cells. In the present work we combine measurements of supported lipid membranes (SLBs) at the MARIA neutron...
Johannes Munke
(Heinz Maier-Leibnitz Zentrum (MLZ), TU München, Lichtenbergstr. 1, 85748 Garching, Germany)
20/06/2017, 16:40
A great effort has been focused on the development of a new alloy that can operate over $700 \, \mathrm{°C}$ and can be processed by normal industrial wrought techniques, mainly for aircraft engines and gas turbine applications. VDM Alloy 780, a Ni-based superalloy (NiCoTiAlNbCrMoNiFe), is a promising candidate for this high-temperature application that require e.g. good mechanical properties....
Alexander Heldman
(MLZ TU München)
22/06/2017, 09:00
Short talk
The single crystalline elastic constants are essential for technical materials. For most of the engineering-alloys the fabrication of single-crystalline specimen is either difficult or even impossible and therefor the derivation of these constants is complicated.
Different diffraction techniques allow the investigation of poly-crystalline and multi-phase materials due to its outstanding...
Tobias Widmann
(TUM, Physik Department, E 13)
21/06/2017, 11:15
Strong volume shifts of polymer thin films due to small modifications of an external stimulus like temperature are desired for a number of applications such as thermoresponsive nanoswitches or drug delivery in medicine. In this context the polymer which received most attention so far is poly(N-isopropylacrylamide), PNIPAM. The volume shift arises due to the collapse transition of the polymer...
Robert Georgii
20/06/2017, 15:15
Dr
Thomas Faestermann
(TUM)
21/06/2017, 20:00
Plenary talk (only invited speakers)
Stars with a mass larger than about ten times that of our Sun usually end in Supernova-explosions. Most of the material synthesized in earlier burning stages or during the explosion is expelled and travelling through space. If such an explosion happens close to the solar system also radionuclides will be deposited on Earth and other Solar system bodies. At the MLL tandem accelerator in...
Sebastian Grott
(TU München, Physik-Department, Lehrstuhl für Funktionelle Materialien)
20/06/2017, 14:36
Organic solar cells have attracted increased attention due to their advantages in tunable characteristics, low-cost manufacturing processes and flexibility, which opens up a promising alternative for conventional photovoltaics. Recently the most widely investigated bulk heterojunction donor-acceptor system of P3HT:PCBM was doped with iron oxide nanoparticles, resulting in an increase of...
Mr
Manuchar Gvaramia
(JCNS)
20/06/2017, 16:41
phospholipid-based bilayers are widely used as model systems for studying the more complicated biological cell membranes, providing information about their structure and interactions. In particular, we are interested in understanding the effect of drugs on phospholipid-based membranes, i.e. the action mechanism, and the eventual toxicity when administered at high concentrations. This knowledge...
Dr
Ezzeldin Metwalli
(TU München)
22/06/2017, 09:45
Stable and safe lithium-ion batteries with high capacity are a current research area of great importance due to its applications in electric vehicles and flexible portable electric devices. Using the sol-gel method, TiO2/SiO2 nanostructured hybrid electrodes were prepared using polystyrene-block-polyethylene oxide (PS-b-PEO) diblock copolymer as a guiding template. The current study showed the...
Ms
Franziska Löhrer
(TU München, Physik-Department, LS Funktionelle Materialien)
20/06/2017, 11:00
With their easy processability, high flexibility and tunable optical properties, organic photovoltaics offer a wide range of potential applications. Although based on organic materials, photovoltaic devices typically contain metal contacts due to their unrivaled electronic conductivity. These contacts have a major influence on the solar cell performance. Our work focuses on the nanostructure...
Fabien Guelle
(E13)
20/06/2017, 14:40
Poster
Electricity is needed in many situations of our daily life at many different locations around the globe. Solar energy has the major advantage that the conversion process light/energy is simply available during daylight. It does not have to be actively transported or stored and is free of political control. Therefore, a strong interest in solar energy conversion has manifested over the last...
Mr
Wei Chen
(Technische Universität München)
20/06/2017, 14:35
Blends of semiconducting polymers and inorganic semiconductor nanocrystals, like quantum dots (QDs), have started to attract intensive interests because of their inexpensive costs and the abilitiy of being solution processed. Both facts render them very promising candidates for next generation organic photovoltaics. Hybrid bulk heterojunction (BHJ) solar cells integrated with CuInSexS2-x...
Gilles Möhl
(TUM E13)
20/06/2017, 14:38
Poster
Many present problems regarding the safety of liquid electrolytes in lithium-ion batteries may potentially be overcome by the use of solid-state polymer electrolytes. Polystyrene-block-polyethylene oxide PS-b-PEO diblock copolymer (DBC) electrolyte have been recently investigated as a membrane for Li-ion battery. The performance of these DBC electrolytes strongly depends on its morphology,...
Mr
Lucas Kreuzer
(TU München, Physik-Department, Fachgebiet Physik weicher Materie/ Lehrstuhl für Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching)
21/06/2017, 11:00
Responsive polymers, especially in thin film morphology, are of great
interest for a wide variety of applications where a strong change of volume
is desired even for small changes of an external stimulus such
as temperature. In this context the most prominent representative
is poly(N isopropylacrylamide) (PNIPAM). We study a new block
copolymer which comprises a PNIPAM block and a...
Dr
Dietmar Schwahn
(Forschungs-Neutronenquelle Heinz Maier-Leibnitz (FRM II), Technische Universität München (TUM),)
20/06/2017, 12:40
Biofouling, RO Membranes, Small-Angle Scattering, in-operando wastewater desalination
Mr
Johannes Schlipf
(TU München, LS Funktionelle Materialien E13 (Peter Müller-Buschbaum))
20/06/2017, 14:31
Organometal halide perovskites mark a paradigm shift in photovoltaic research, as they combine high power conversion efficiencies with easy processing and cheap, abundant precursor materials making them a promising contender for other photovoltaic technologies. The commercial application of perovskite solar cells, however, is so far impeded by fundamental understanding lacking behind this fast...
Ms
Judith Witte
(TU Berlin)
21/06/2017, 11:45
The physical properties of stimuli-responsive microgels and polymer brushes still attract great interest in basic research and lead to a lively discussion of potential technical applications. Prominent examples are systems, which undergo a temperature induced phase transition as the sample temperature changes.
Microgel particles can be easily organized as ultra-thin films at solid surfaces,...
Dr
Amir Syed Mohd
(Juelich Centre for Neutron Science JCNS)
21/06/2017, 11:30
Different combinations of ferromagnetic (FM) layers and antiferromagnetic (AFM) layers give rise to many exciting effects such as exchange bias [1] and exchange spring [2, 3]. It is well known that these effects are mainly governed by the proximity of FM/FM or FM/AFM or AFM/AFM interfaces. Moreover, different combinations of FM and AFM materials in the form of trilayers allow the co-existence...
Mr
Oliver Filonik
(TU München - Munich School of Engineering)
20/06/2017, 16:32
Organometal halide perovskite based solar cells have emerged as the fastest-advancing photovoltaic technology to date, reaching certified solar cell efficiencies of up to 22.1%. Recently, the focus of research broadened beyond high efficiencies to key values like prolonged device lifetime and stability that are required for industrial implementation. A novel perovskite cell architecture...
Mrs
Regina Kluge
(TUM E13)
20/06/2017, 14:37
Poster
Thermoelectric generators are a promising approach in renewable energies, as they are able to convert waste heat into electricity. Possible applications are large scale applications like recovering the waste heat of a car engine as electricity as well as niche applications like using the heat emitted by human skin to drive a watch.[1]
In practice, a thermoelectric generator traditionally...
Mrs
Victoria Kononikhina
(Helmholtz-Zentrum Geesthacht)
21/06/2017, 11:30
Short talk
γ-TiAl alloys are attractive materials for structural high temperature applications due to their high specific tensile and creep strength. Nevertheless, their wider application is still hampered by the difficulties involved with TiAl processing and by the limited understanding how ductility and damage tolerance of the material during service is influenced by microstructure and phase...
Steffen Schlosser
(TUM E13)
20/06/2017, 14:39
Poster
As the need for sustainable energy sources is steadily increasing, the concept of photovoltaics has attracted both scientific and economic interest. Whereas conventional semiconductor-based solar cells are already well researched and their efficiencies are promising, their energy need for the mere production and their lack of versatility remain a major drawback. Therefore, concepts are needed,...
Mr
Dominik Schullerer
(TU München, Physik-Department E13)
20/06/2017, 14:30
Organic light emitting diodes (OLED) are reaching inner quantum efficiencies close to 100%, but the overall efficiency of conventional devices is limited to about 20% mainly by the photon extraction. One approach to overcome this issue is the implementation of an additional scattering layer into the device. A standard OLED is used to study the impact of such layer. This layer can either be...
Dr
Wentao Jin
(MLZ JCNS)
20/06/2017, 09:45
Plenary talk (only invited speakers)
The discovery of iron-based superconductors in 2008 has attracted worldwide attention in the unconventional high-temperature superconductivity research. Among various classes of Fe-based
superconductors, the ternary “EuFe2As2” system is a unique representative, due to the two magnetic sublattices and the strong coupling between spin-, lattice- and charge degrees of freedom. Superconductivity...
Martin Muehlbauer
21/06/2017, 11:30
Short talk
Lithium-ion batteries are part of our everyday life powering innumerable devices. Especially lately the number of applications related to electromobility and energy storage is increasing. Besides higher energy/power density and rate capability this calls for further improvements the life span of Li-ion cells. There are still some processes inside lithium-ion batteries that are not understood...
Mr
Stephan Proeller
(MSE - Herzig Group)
20/06/2017, 12:00
The nanomorphology can strongly influence the physical properties of organic thin films. For example, polymer:fullerene blends used in organic photovoltaics vary significantly in performance depending on the inner film morphology. To allow large-scale production of these devices, control of the nanostructure during the processing of the active layer is important. This needs an understanding of...
Kirill Nemkovskiy
22/06/2017, 09:00
Short talk
One way for saving energy in daily life is using the magnetocaloric effect (MCE), i.e. the change of magnetic entropy and adiabatic temperature following a change in an applied magnetic field. The ferromagnetic compound MnFe4Si3 is a promising candidate for applications. It has a magnetic phase transition in the range of 300 K and shows a moderate MCE of 2.9 J/kg K at a reasonable magnetic...
Lorenz Bießmann
(TU München, Physik-Department E13)
20/06/2017, 11:40
Towards flexible substrates for organic light emitting diodes and organic photovoltaics it is of significant interest to replace brittle and costly electrodes like ITO or FTO as well. PEDOT:PSS offers with its good conductivity, easy processibility, and inherent flexibility a suitable alternative to its rigid and transparent conducting oxide counterparts.
The hygroscopic behavior of the PSS...
Mr
Nuri Hohn
(TU München, Physik-Department, LS Funktionelle Materialien)
20/06/2017, 14:34
Organic materials have been found to offer various, promising advantages
for photovoltaic (PV) devices like flexibility and the potential
of low-cost/large scale production. Hybrid devices combine these advantages
with the chemical/physical stability of inorganic materials
and, thus, overcome the issue of limited lifetimes of purely organic
cells. Poly(styrene-block-ethylene oxide)...
Mr
Nitin Saxena
(Technische Universität München, Lehrstuhl für Funktionelle Materialien)
22/06/2017, 10:15
Kun Wang
(Technische Universität München, Fakultät für Physik, Lehrstuhl für Funktionelle Materialien)
20/06/2017, 11:20
Hybrid solar cells, a combination of conventional inorganic and organic photovoltaic systems, offer outstanding potential due to their minor investment compared to inorganic solar cells and higher stability compared to organic solar cells. However, so far device efficiencies are significantly lower as compared to the other photovoltaic systems. A possible way to improve the film structure and...
Mr
Kiran Mathew John
(Lehrstuhl für Funktionelle Materialien, Physik-Department, Technische Universität München)
20/06/2017, 14:33
Organometal halide perovskites have been shown to be great candidates for photovoltaics, owing to the strong absorption, and high mobility and diffusion length of photo-generated charge carriers. Subsequently, solar cells employing perovskite thin films have reached efficiencies of more than 20%, making them comparable with commercially available silicon solar cells. The performance of...
Dr
Stefan Wellert
(TU Berlin)
21/06/2017, 09:45
Plenary talk (only invited speakers)
Scanning the dynamic profile across thin polymer coatings opens a new field for a better understanding and the design of novel surface functionalisation. Surface functionalisation via formation of stimuli-responsive surface structures using colloidal structures is an active field of research.
Here, we used ethylene glycol (EG) based thermoresponsive microgel particles as building blocks and...
Li Xiaosong
(TUM FRM)
20/06/2017, 12:00
Short talk
eutron activation analysis is a very sensitive method to determine main, minor and trace elements in materials. The FRM II offers a series of irradiation facilities with different neutron fluxes and properties for the multi-elements analysis. The presentation will introduce some projects to demonstrate the diverse applications of NAA.
Manufacturing of special alloys for the new generation of...
Markus Trunk
(TUM)
20/06/2017, 16:36
Poster
Neutron Depth Profiling (NDP) is a non-destructive, near-surface analytical technique to selectively study the distribution of several light elements with high lateral and depth resolution [1]. Upon capture of a neutron, the investigated elements emit charged particles, which carry the depth information of the parent nuclei and are detected via surface barrier detectors. NDP offers a wide...
Dr
Michael Lerche
(University of California, Davis)
20/06/2017, 11:30
Short talk
ODIN (Optical and Diffraction Imaging with Neutrons) is a beamline project at the European Spallation Source (ESS). It is a collaboration between the ESS, PSI and TUM, with TUM as lead institution.
ODIN will provide a multi-purpose imaging capability with spatial resolutions down to the μm-range. The pulsed nature of the ESS source will give access to wavelength- resolved information....
Vladimir Hutanu
21/06/2017, 10:30
Short talk
Solving complex magnetic structures like direct distinguishing between cycloidal, helical and amplitude modulated spin arrangements; interplay between the crystal and magnetic chirality; short range magnetic/nuclear correlations in frustrated systems; local spin anisotropy (susceptibility tensor approach) at the unit cell level; magnetic domains distribution and their dynamics in complex...
Mr
Matthias Dodenhöft
(E21/NEPOMUC)
22/06/2017, 11:00
The precise knowledge of the surface structure is essential to understand e.g. chemical reactions, optimize catalytic techniques or develop nanoelectronic devices. It has been shown that Total Reflection High-energy Positron Diffraction (TRHEPD) is a powerful tool to determine the positions of adatoms and topmost layers of reconstructed surfaces with unprecedented accuracy. In contrast to the...
Ms
Shambhavi Pratap
(Technische Universität München)
20/06/2017, 14:32
Solar cells based on organometallic lead halide perovskites have established themselves as a promising alternative to commercial thin film solar cells. The crystallographic versatility of the material allows the possibility of extensive chemical tuning, which manifests in the material as a spectra of properties that may be obtained. This entices research on hybrid perovskite structures...
Dr
Sabine Pütter
(Jülich Centre for Neutron Science JCNS, Outstation at MLZ, Forschungszentrum Jülich GmbH)
21/06/2017, 10:30
To solve todays challenges in energy conversion and information technology, fundamental understanding of thin films and nanostructures is required [1,2,3]. Prerequisite, however, is the fabrication of thin films. Molecular Beam Epitaxy (MBE) is a very versatile method to grow high quality and high purity epitaxial films with low intrinsic defect concentrations and atomic-layer control.
At...
Prof.
Andreas Schreyer
(Helmholtz-Zentrum Geesthacht)
20/06/2017, 09:00
Dr
Emmanuel Kentzinger
(Jülich Centre for Neutron Science)
21/06/2017, 11:00
Short talk
In the past, we have simulated off-specular scattering of polarized neutrons from laterally patterned magnetic multilayers, based on the formalism developed by Boris Toperverg [1]. We would like to present how we used this theory so far [2].
[1] E. Kentzinger, U. Rücker, B. Toperverg, Physica B 335, 82 (2003)
[2] E. Kentzinger, U. Rücker, B. Toperverg, F. Ott and T. Brückel, PRB 77,...
Mr
Senlin Xia
(Lehrstuhl für Funktionelle Materialien, Physik Department E 13, Technische Universität München)
22/06/2017, 09:30
Nanostructured polymer films containing magnetic nanoparticles (NPs) are promising materials due to their potential applications in the areas of high-density storage and magnetic sensors. Owing to the advantages, like large-scale production and energy saving, printing techniques were employed to fabricate hybrid films composed of maghemite NPs and PS-b-PMMA diblock copolymer (DBC). External...
Dr
Judith Houston
(JCNS at MLZ)
22/06/2017, 09:00
The performance of organic photovoltaic devices (OPVs) depends critically on simultaneous control of the optoelectronic properties and nanoscale morphology of conjugated polyelectrolytes (CPEs).[1] Recently, self-assembly strategies have emerged as an elegant approach for the design and fabrication of reproducible nanoscale aggregates from CPE building blocks.[2] The challenge, however, is to...
Dr
Maria Maddalena Schiavone
(Jülich Centre for Neutron Science - Outstation at MLZ)
21/06/2017, 10:30
The development of combined techniques for measuring of the samples is generally desirable, because it allows following two or even more physical parameters on the same sample at the same time. In this regard, complementary time-resolved in-situ Fourier-transform infrared spectroscopy (FTIR) applied to small-angle neutron scattering (SANS) is useful for the investigation of structural changes...
Victor Oliveros Colon
(E13)
20/06/2017, 14:41
Poster
Multi-responsive polymers have gained a lot of attention, mainly due to the huge array of applications [1] they can be used for, such as sensors, drug delivery systems or tissue engineering. In this work, core-shell micelles with a pH-responsive shell, whose shell blocks undergo a phase transition from expanded to collapsed as a response to changes on the pH, are investigated. At higher...
Nicolas Walte
22/06/2017, 12:15
Plenary talk (only invited speakers)
Most material of the Earth is situated in its deep interior and therefore subject to pressure and temperature conditions that are conventionally considered extreme. In addition, this material is largely inaccessible to direct observation; hence, knowledge of the interior structure of the Earth stems from a combination of geophysical probing methods such as the travel times of seismic waves and...
Ms
Tetyana Kyrey
(JCNS at MLZ, Forschungszentrum Jülich GmbH, Stranski-Laboratorium, TU Berlin, 10623 Berlin)
21/06/2017, 11:30
Nanostructures and nanoparticles are on the top of technique and biomedical application. A special class of such systems is the polymers adsorbed on a substrate. Confinement at the surface changes their physical and chemical properties with respect to a bulk system that open a new possibility for the usage in long-time biomedical applications also at body temperature. Formation of stimuli...
Dr
Judith Houston
(Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH)
20/06/2017, 16:38
Poster
The small-angle neutron diffractometer KWS-2, operated by the Jülich Centre of Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), is dedicated to the investigation of mesoscopic multi-scale structures and structural changes due to rapid kinetic processes in soft condensed matter and biophysical systems. Following demands from the user community, it was recently considerably...
20/06/2017, 14:30
Plenary talk (only invited speakers)
Neutron Beta Decay is described accurately within the Standard Model of Particle Physics using the first CKM-matrix element, Vud, and the ratio of vector and axial vector couplings, λ, as parameters. Angular correlations, spectra and the neutron lifetime are accessible experimentally, providing an excellent toolkit for investigating the structure of weak interaction and potential deviations...
Sebastian Muehlbauer
22/06/2017, 11:30
Plenary talk (only invited speakers)
The Nobel Prize in Physics 2016 was awarded with one half to David J. Thouless, and the other half to F. Duncan M. Haldane and J. Michael Kosterlitz "for theoretical discoveries of topological phase transitions and topological phases of matter".
In my talk I will explain the theoretical concepts awarded with the Nobel Prize and their experimental realizations with a strong focus on the...
Dr
Henrich Frielinghaus
(JCNS)
20/06/2017, 16:31
The pretreatment of wood in ionic and complementary liquids is studied in and ex situ by small angle neutron scattering studies. We detect different stages of decomposition and connections to morphological stages. The general aim of the pretreatment is the accessibility of the cellulose to enzymatic scission of the chains such that valuable oligomers are obtained for further chemical reactions.
Dr
Volker Körstgens
(TU München, Physik-Department, LS Funktionelle Materialien)
20/06/2017, 12:20
*in situ* studies of particular fabrication steps
