10th MaMaSELF Status Meeting 2018

Session

Student session

23 May 2018, 08:45

Abtei Frauenwörth im Chiemsee

Conveners

Student session: Early morning session (I)

• Wolfgang SCHMAHL (LMU)

Student session: late morning session (II)

• Jurg Schefer (PSI)

Student session: Early afternoon session (III)

• Peter Müller-Buschbaum (FRMII/TUM)

Student session: Late afternoon session (IV)

• Jacek Kubicki (AMU)

Student session: Early morning session (V)

• Winfried Petry (FRMII/TUM)

Student session: late morning session (VI)

• Pieter Glatzel (ESRF)

Student session: Early afternoon session (VII)

• Werner Paulus (UM)

Student session: Late afternoon session (VIII)

• Sohyun Park (LMU)

Student session: Early morning session (IX)

• Wolfgang Schmahl (LMU)

25. Abstract Brian QUERE

Student contribution

Student contribution

Nonlinear recombination processes in perovskite materials for solar cells

9. Abstract:creation and quantum optical characterization of colour centres in artificial diamond

Student contribution

Student contribution

In quantum technologies perspective, the long term-goal is a quantum web where quantum computers, simulators and sensors are interconnected via quantum network distributing information and quantum resources. For what concerns quantum cryptography in quantum communication, a withstanding issue is represented by the need of efficient single photon sources characterized by high stability, long...

6. Analysis and Reconstruction of X-ray and Neutron diffraction computed tomography data

Student contribution

Student contribution

The X-ray diffraction computed tomography (XRD-CT) – an experimental tool combining the powder diffraction in transmission mode with computed tomography, that can deliver spatially resolved structural information from the interior of the chemically non-homogeneous objects. Originally demonstrated as a laboratory technique, this method has been at most using high-energy synchrotron X-ray...

16. Antibacterial nanofiber with smart release of drug

Student contribution

Student contribution

Nanofiber brings larger surface to fibre, indicating more contact area. When drug is blended in the nanofiber, nanofiber has the possibility to release the loaded drug on demand. Therefore, the properties of the nanofiber, the carrier, are of great significance. Polymers with Tg around 25 °C are chosen as the carrier, so that drug can be released at body temperature during sporting. Since body...

29. Characterization & Assessment of Residual Stress Fields in Laser Welded Ti6Al4V Components for Satellite Application

Student contribution

Student contribution

See Attached

17. Corrosion inhibition of water-steam cycles in power plants by film forming amines

Student contribution

Student contribution

Good treatment program for steam cycle boiler feed water is crucial to the smooth operation of steam generators. Faulty treatment can cause damage to the plant, with attendant high costs. Conventional treatment programs have three components: oxygen scavengers, alkalising amines, and phosphate. In a treatment program based on film-forming amines (FFAs), the functions of both oxygen scavenger...

20. Electronic Characterization of Functional Oxides using advanced photoemission spectroscopy techniques

Student contribution

Student contribution

The properties of the La2/3Sr1/3MnO3/SrTiO3 (LSMO) interface have been subject of interest since the discovery of the possibility of use this composite as a magnetic tunnel junction (MTJ) due to its half-metallic character in its ferromagnetic phase, which leads to high tunnel Magnetoresistance (TMR) effect. By other side, interesting studies on polar metals in thin films of perovskite...

21. Exploring oxygen ion conductor ceramics: synthesis, structure and ion conductivity

Student contribution

Student contribution

Potential ionic oxygen conductors with unit formula Sr2TiO4 and Fe-, V-, Nb- and Mo-doped Sr2TiO4 were synthesized through solid state reaction technique. The effect of doping at Ti-site of Sr2TiO4 with Fe3+, Nb4+, V5+ and Mo5+ on oxygen ionic and mixed ionic-electronic conductivity have been investigated. The crystalline structures of these specimens were studied with X-ray diffraction (XRD)...

13. Gold nanoparticles embedded into porous matrices: structural and electronic properties

Student contribution

Student contribution

Noble metal nanoparticles (NPs) play an important role in modern catalysis. Embedded into metal organic frameworks MOFs, they are part of the new branch of hybrid materials having been studied with the scope of applications in the fields of heterogeneous catalysis and hydrogen storage. The scope here is to achieve a highly loaded porous material with cavity-size matching NPs and well defined...

26. Immobilisation of Gold nanoparticles by selected antiHCC antibodies - preliminary studies

Student contribution

Student contribution

The noble metal nanoparticles have been intensively studied for a long time. The photonic properties of gold or silver particles are appealing for materials applications. For example gold nanoparticles offer a wide spectrum of applications in biomedicine. When it is used for biomedicine, there is a crucial issue which is their cytotoxicity. It depends on various factors, including morphology....

15. Investigation of high-temperature multiferroic perovskites

Student contribution

Student contribution

The increasing miniaturazation of electronic components is constantly pushing the material scientists and ingeneers to seek for new materials which could accomplish more than one task at a time. Multiferroics, and their versatility, are of great interest for the new generation of data storage devices. The O-defficient double perovskite YBaCuFeO5 hosting magnetoelectric properties is a serious...

22. Investigation of Li de/insertion in Multi cation substituted Mn-Spinels

Student contribution

Student contribution

The rapid development in the automobile and energy sectors has led to the demand of improved lithium ion batteries. Since the electrochemical performance of a battery is limited by its cathode, therefore, cathode materials with high rate capability, specific capacity and long cycling life are required. Ni-doped Mn spinel (LNMO) materials are promising candidates due to their high...

23. Ionosilica nanofibrous membranes for anion exchange

Student contribution

Student contribution

Abstract on the « ionosilica nanofibrous membranes for anion exchange/decontamination of water » presentation

This presentation will present the advancement on the synthesis and the properties of these ionosilica membranes.

It will first be focused on the synthesis of the ionic liquid precursors and their physico-chemical interest that will be later used in solutions for...

2. Lead free piezoelectric thin films and powders

Student contribution

Student contribution

Piezoelectric materials are nowadays intensively used in numerous fields of modern society (sensors, energy harvesters from vibrations, etc.). The research work focuses on tetragonal tungsten bronze (TTB) phases that have received little attention until now compared to perovskite phases, although TTB structures have diverse properties (e.g. nonlinear optic, pyroelectric, and piezoelectric) as...

3. Magnetic Nanoparticles in Polymer Matrix

Student contribution

Student contribution

Nanostructured films composed of a polymer matrix and functional magnetic nanoparticles are promising materials due to their interesting physical properties in the areas of information storage and magnetic sensors. Hybrid films of the diblock copolymer polystyrene-block-poly (ethylene oxide) (PS-b-PEO) and surface-functionalized magnetic nanoparticles (Fe$_3$O$_4$ with hydrophobic coating)...

10. Modulated synthesis of MOF MIL-88A: a preliminary study for its biomedical application

Student contribution

Student contribution

Metal organic frameworks (MOFs) are porous materials possessing a modular structure of inorganic secondary building units (metal ions or clusters) connected by organic linkers. MOFs have a wide range of applications, thanks to their large surface area, easily tunable composition and pore size variability: catalysis, gas separation, optically active materials, biomedicine [1]. One of the...

19. Molecular brushes investigated by scattering methods

Student contribution

Student contribution

Molecular brushes consist of a polymeric backbone with densely grafted side chains. In case a molecular brush contains both hydrophobic and hydrophilic segments, it takes on an elongated shape, which makes it a potential drug carrier in the human body . Poly(2-oxazoline)-based molecular brushes are especially well-suited to this purpose due to their high biocompatibility .
In the present...

18. Na+ diffusion in Na-ion battery materials investigated by neutron diffraction

Student contribution

Student contribution

Batteries are playing prominent role in energy storage technology, both for portable devices and large-scale stationary storage. Presently, most battery technologies are based on diffusion of light Li-ions between the host materials at the anode and the cathode. Given the scarcity and the increasing price of lithium, cheaper and more abundant sodium, that has close chemistry but bigger in...

7. Nanoscale Exsolution and Interface Structures in High-Temperature Shape Memory Alloys

Student contribution

Student contribution

Ti-Ta alloys possess an attractive high temperature shape memory properties with potential to be utilized for aerospace and MEMS applications. However, their applications are limited by the formation of complex omega phase during thermo-mechanical cycling, which hampers the martensitic transformation and shape memory effect.To overcome this problem, exsolution of omega phase through rapid...

4. Printed fullerene-free thin films for photovoltaic applications

Student contribution

Student contribution

In the past decades, organic photovoltaics (OPVs) have attracted considerable attention owing to their remarkable characteristics, such as light weight, flexibility, easy processability, potential low-cost fabrication and high throughput. Fabrication techniques include spin-coating, doctor-blading, spray casting and roll-to-roll printing. Among these, the scalability of printing processes...

5. Quantitative Phase Analysis of Industrial Vanadyl Phosphate Catalyst

Student contribution

Student contribution

Vanadyl phosphate catalyst has been used industrially for the last few decades for selective oxidation of n-butane to maleic anhydride. However, owing to containing different phases within the catalyst system, the exact nature of the relation between the phases and catalytic properties are still under dispute. The main crystalline phase is supposed to be V4+ of (VO)2 P2 O7 (VPP) together with...

24. Simultaneous measurement of relaxation times and proton density fat fraction in bone marrow using Magnetic Resonance Spectroscopy

Student contribution

Student contribution

Clinical application of magnetic resonance (MR) technique has been developed for several tens of years since late 1970. Currently, MR plays an important and irreplaceable role in disease diagnose and trace of therapy response. Compare to MR imaging, MR spectroscopy gives additional information of quantification of different resonance signals due to chemical shift. This contrast of chemical...

11. Spray cast organic solar cells

Student contribution

Student contribution

Besides having a research focus on preparation methods, deposition techniques play an important role in producing solar cells as well. In particular, next generation solar cells are typically based on a wet chemical approach and therefore enable completely new pathways of device manufacturing. Compared to laboratory-based routines such as spin coating, large-scale coating processes such as...

8. Structural and electronic correlations in $\text{PSNO}_{\text{x}}$

Student contribution

Student contribution

Structural and electronic ordering in co-doped nickelates compounds, such as $\text{Pr}_{\text{2-x}}\text{Sr}_{\text{x}}\text{Ni}\text{O}_{\text{4+$\delta$}}$, leads to a complex phase diagram and interesting physical properties. Interstitial oxygen ordering has been shown to be the fundamental for the high oxygen ion mobility, making of this material a model for SOFCs electrodes. On top of...

30. structural transormations of photoswitchable complexes captured by quantitative XANES

Student contribution

Student contribution

structural transormations of photoswitchable complexes captured by quantitative XANES
by LIU Xuanran
1. Introduction to XANES
2. Finite difference method
a) Finite Difference Method (FDM) and Green formalism
b) multi-electronic extension using the “Time-Dependent DFT”
c) Convolution with the FDMNES
3. Result of calcutaions for ground states of Febpy, Fedcpp and Fe-terpy: by using the...

12. Synthesis, structure, valence state and physical properties in Fe-containing perovskite matrix for energy materials

Student contribution

Student contribution

Due to the demands on energy, the search and improvement of energy materials have become one of the most popular topics around the world. Among them, the development of oxygen ion conductor is receiving increasing attention due to its importance in solid oxide fuel cells (SOFCs), batteries, electrodes, sensors, and catalysis. SOFCs, for example, has several advantages over other types of fuel...

28. Ultrafast photo-switching in dielectric materials with spin cross over

Student contribution

Student contribution

It has been admitted that classical phase transition in materials can be driven by external parameters such as changes in temperature and pressure. More recently light has been used to drive phase transitions faster (because of the use of short light pulses) and especially differently since femtosecond pulses could couple to electronic degrees of freedom before the system can move.

The main...

27. XAS and EXAFS of dioxygen binding to binuclear copper complexes.

Student contribution

Student contribution

Tyrosinase is an essential enzyme in many organisms, including humans. Its ability to oxidize molecules by utilizing molecular oxygen is commonly applied in nature for the synthesis of melanin, a pigment which has many protective properties. Being highly efficient and selective, the reaction could also have interesting industrial applications. However, the exact geometric structure of the...