X. Zhang
(TU München, Physik-Department, Physik weicher Materie)
16/06/2015, 16:40
Poster
Polymer drug carriers based on HPMA copolymers have been studied extensively over the past few years [1,2], to understand the behavior and shape of the copolymers in dilute solutions. However, there is a lack of knowledge on the behavior of these drug carriers in real human blood environment.
We use HPMA copolymers labeled with fluorescent dyes, which are dissolved in a solution of human...
Natalya Vishnevetskaya
(Fachgebiet Physik weicher Materie/Lehrstuhl für Funktionelle Materialien, Physik-Department, Technische Universität München)
16/06/2015, 12:06
Diblock copolymers consisting of a thermo-responsive poly(N-isopropylmethacrylamide) (PNIPMAM block) and a zwitterionic poly(sulfobetaine) (PSB block) feature both a lower and an upper critical solution temperature (LCST and UCST) in aqueous solution. P(SB-b-NIPMAM) expected to form in water the following phases: (i) micelles with PNIPMAM shell and PSB core or vice versa at low and high...
Mr
Edoardo Barabino
(TU München, Physik-Department, LS Funktionelle Materialien.)
16/06/2015, 16:40
Poster
Organic photovoltaic devices are a promising source of green energy. In such cells the generated excitons are separated by the electric field built up by the difference in work functions at the interfaces between the polymer (PTB7-Th) and the fullerene (PC71BM). Thus, a crucial parameter for solar cell performance is the morphology of the polymer-rich (or fullerene-rich) domains.
The ratio...
Ms
Franziska Löhrer
(Lehrstuhl für Funktionelle Materialien, Department für Physik E13, TU München)
16/06/2015, 16:40
Poster
Organic photovoltaics are gaining impact as a feasible alternative to conventional solar cells. Using polymers as active material has several potential advantages, for instance reduced production costs and an increased device flexibility. However, efficiencies of polymer solar cells stay far below those of inorganic photovoltaics. In order to enhance the solar cell performance, recent research...
Mr
Micael Gouveia
(Centro de Química-Física Molecular and Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico – University of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon, Portugal; Physik-Department, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany)
16/06/2015, 16:40
Poster
Orthogonally switchable block copolymers show rich phase behavior in aqueous solution. In dependence on temperature and pH, e.g. unimers, core-shell micelles, reverse core-shell micelles or large aggregates may be formed. We investigate a block copolymer with a polybasic pH sensitive block of (diisopropylamino)ethyl methacrylate and a thermoresponsive block composed by a random copolymer of...
38.
Crystallinity and phase separation in nanocomposite copolymer electrolytes for Lithium batteries
Dr
Konstantinos Raftopoulos
(Technische Universität München, Physics Department, Soft Matter Physics Group.)
16/06/2015, 16:40
Poster
Long scale transition to green energy and wide penetration of electric cars, demand for batteries with high power density, and good mechanical stability. The electrolyte is of crucial importance for both. Poly(ethylene oxide) (PEO), although very reliable, has two drawbacks: 1) poor mechanical stability 2) crystallinity, acting as barrier to the ion mobility. Mechanical stability may be...
Mr
Richard Stockhausen
(Technische Universitaet Muenchen-Lehrstuhl E13)
16/06/2015, 16:40
Poster
In comparison to conventional silicon solar cells, organic photovoltaics (OPVs) offer several advantages, like ease of production and a high versatility. Nevertheless, their lifetime needs to be prolonged, so that a profitable large-scale production becomes feasible. Therefore a detailed understanding of the degradation mechanisms is necessary. In our investigations, the degradation of OPVs is...
Karl Zeitelhack
15/06/2015, 15:25
Dr
Alexandros Koutsioumpas
(JCNS)
17/06/2015, 11:46
Dr
Antti Soininen
(Forschungszentrum Jülich GmbH JCNS - MLZ)
17/06/2015, 11:40
Bart-Jan Niebuur
(TUM Physik-Department E13)
16/06/2015, 16:40
Poster
A promising way to achieve site-specific delivery of anticancer agents is to use the enhanced permeation and retention (EPR) effect of N-(2-hydroxypropyl) methacrylamide (HPMA) nanoparticles containing the drug doxorubicin (Dox) [1]. The present research in this field focuses on exploration of the particle structure and tuning of their properties. A low critical micelle concentration (CMC) and...
34.
Efficiency increase of P3HT:PCBM organic solar cells doped with iron oxide(II,III) nanoparticles
Mr
Daniel Moseguí González
(TU München)
16/06/2015, 16:40
Poster
Organic solar cells of P3HTPCBM have received the highest attention due to easy commercial availability. In the present work P3HT:PCBM bulk heterojunction solar cells are doped with different concentrations of surface coated Fe3O4 nanoparticles. At low nanoparticle concentrations (below 1 wt%) an increase in the power conversion efficiency (PCE) of up to 11% is found. This improvement in the...
Mr
Moritz Futscher
(Technische Universität München)
16/06/2015, 16:40
Poster
Designing hybrid inorganic-organic semiconductor devices requires control over the energy-level alignment at the hybrid interface to achieve desired functionality such as efficient charge-carrier transfer. In this study, the energy-level alignment of the interface between Zn-terminated ZnO (0001) and the hole transport material N,N’-bis(1-naphthyl)-N,N’-diphenyl-1,1’-biphenyl-4,4’-diamine...
Mr
Bo Su
(TU München, Physik-Department, LS Funktionelle Materialien)
16/06/2015, 16:40
Poster
Due to high surface to volume ratio and their bicontinuous morphology, foam-like nanostructures are becoming more interesting in photovoltaics. Controlling the pore size is crucial for photovoltaic applications, such as in case of dye-sensitized solar cells (DSSCs) and solid state DSSCs. In this study, spray coating is used, which is deposition method allowing for scaling-up to large scale...
B Märkisch
15/06/2015, 14:40
Dr
Harald Breitkreuz
(FRM II)
17/06/2015, 11:00
FRM II’s nuclear license contains an obligation to exchange its nuclear fuel to a lower enrichment once such a fuel is available. This task contains essentially two major pillars, the participation in the world-wide efforts to develop the fuel and to perform the necessary core calculations for this specific reactor. In the last 10 years, a scenario for the core conversion has been developed...
Mr
Simon Schaper
(TU München, Physik-Department, Lehrstruhl für Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching)
16/06/2015, 16:40
Poster
In the light of an increasing demand on power sources for portable electronic devices, the nano-scaled lithium based membranes paves the way for new opportunities regarding design, application and integration of rechargeable batteries. In this work, the morphology of lithium ion-polymer hybrid material based on high-molecular-weight polystyrene-block-polyethylene oxide PS-b-PEO diblock...
Mr
Nitin Saxena
(Technische Universität München, Lehrstuhl für Funktionelle Materialien)
16/06/2015, 16:40
Poster
Thermoelectrics present a promising alternative to conventional solar cell technology energy generation. A temperature gradient applied along the thermoelectric material induces an electrical voltage, which is transformed into electrical power.
Although thermoelectrics have already reached high conversion efficiencies, limited and expensive raw materials and cost- and energy-intensive...
Mr
Senlin Xia
(Technische Universität München,Physik Department E 13, Lehrstuhl für Funktionelle Materialien)
16/06/2015, 16:40
Poster
Thin metal coatings on polymers are widely used in electronic devices, such as organic photovoltaic devices and organic field effect transistors. The morphology of the metal electrode on the polymer film plays a crucial role in the performance of such devices. An aluminum contact on polystyrene-b-poly(3-hexylthiophene) (PS-b-P3HT) is prepared with DC sputter deposition. Growth and morphology...
Dr
Wolfgang Kreuzpaintner
(Technische Universität München, Physik-Dep. E21)
18/06/2015, 09:44
While the structural characterisation of thin films during growth by various in-situ techniques is common practice, the in-situ measurement of the magnetic properties of films using (polarized) neutron reflectometry is a challenging task. Within a collaboration of TUM, Uni Augsburg and MPI Stuttgart, we operate a mobile sputtering facility for the growth and in-situ monitoring of magnetic...
Dr
Ezzeldin Metwalli
(TU München)
16/06/2015, 09:00
Soft materials are characterized by both, complexity and flexibility, where structure is often defined in terms of time scales. In particular, the spontaneous association (self-assembly) process of their molecules into a 3-D geometry can be expanded to the control of more complex nanometer-scale functional systems. Areas of interest encompass phase separation and self-assembly of block...
Mr
Johannes Schlipf
(TU München, LS Funktionelle Materialien E13 (Peter Müller-Buschbaum))
16/06/2015, 16:40
Poster
Perovskite solar cells offer the opportunity of easy and potentially cheap processing techniques very comparable to other next generation solar cell such as organic and dye-sensitized solar cells. In addition, the optimization of preparation routines has led to power conversion efficiencies (PCE) of over 15 % for solution processed devices. Device performance, however, is strongly linked to...
Mr
Erxi Feng
(Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH Outstation at MLZ)
16/06/2015, 11:40
Pyrochlore iridates and hafnates A2B2O7 (A= rare earth ion, B=Ir, Hf), in which both the A site and the B site consists of corner-shared tetrahedral, are of particular interest due to the presence of both strong spin-orbital coupling and geometrical frustration. Recently, we have successfully synthesized high quality powder samples of Nd2Ir2O7 and Nd2Hf2O7 which high quality powder samples...
Mr
Chih-Chun Huang
(E13,Physics Department, TUM)
16/06/2015, 16:40
Poster
Hybrid solar cells of inorganic and organic materials mark an important class of next generation solar cells, since they combine the advantages of inorganic materials, such as high stability, with the advantages of organic materials, such as tailoring of band gaps and potential low cost production.
We introduce laser-ablated nanoparticles into hybrid solar cells. The production of...
Ms
yuan yao
(TU München)
16/06/2015, 16:40
Poster
Maghemite nanoparticles (NPs) embedded inside a polymer tem plate mark a novel class of hybrid materials which have attracted high interest due to the potential for many applications such as sensors and magnetic storage mediums. The control of the alignment of the maghemite NPs within the polymer NPs is essential for making well-aligned highly-oriented metal oxide-polymer nanocomposites. The...
P Staron
18/06/2015, 11:45
16/06/2015, 09:45
General topics
17/06/2015, 09:45
General topics
Mr
Kai Müller
(Technische Universität München)
16/06/2015, 16:40
Poster
Within recent years, metalized polymer films have attracted increasing interest due to their possible applications in organic electronic devices. In these devices, a thin metal layer is used as an electric contact in conjunction with an active layer comprising a semiconducting polymer. Since, the electronic properties of such contacts are influenced by the interface between the metal and the...
Dr
Antti Soininen
(Forschungszentrum Jülich GmbH JCNS - MLZ)
18/06/2015, 10:06
We have developed a simulation package 'MSca' to provide an analysis
tool for multiple scattering effects in backscattering spectrometers
such as SPHERES. Multiple scattering has non-trivial wavevector and
energy transfer dependency and is thus difficult to tackle by analytical
methods only. Also, due to the geometry of backscattering instruments,
there are additional multiple scattering...
Ms
Antonella Campanella
(JCNS@FRMII)
18/06/2015, 09:22
We study nanocomposites consisting of a polymer matrix which consists of hydrophobically modified ethoxylated urethane polymers (HEUR) with embedded coated magnetite nanoparticles. Two different kinds of coatings are compared namely the hydrophobic coating, composed of oleic acid and oleylamine, and the hydrophilic coating composed of a cationic surfactant, C18TAB, as an additional layer to...
Dr
Ida Berts
(Jülich Forschungszentrum)
18/06/2015, 09:44
In pharmaceutical sciences, determining the partition coefficient P of a drug is a must, as this quantifies the drug solubility and distribution in the body. P is defined as the ratio of a drug concentration in a mixture of two immiscible phases, usually octanol and water. It implies that the two phases are structurally unaffected by the drug. SAXS reveals that octanol, as well as octanol in...
Mr
Christoph Schaffer
(TUM - Physics Dept. - Functional Materials)
16/06/2015, 16:40
Poster
The use of solvent additives provides a route to strongly improve the performance of polymer:fullerene based organic solar cells (OSC). In case of PCPDTBT:PC71BM, the use of 1,8-octanedthiol (ODT) has been reported to boost the power conversion efficiency from 2.8% to 5.5%. However, the physical mechanism of this improvement, as well as the impact on degradation behavior, when ODT is used is...
Christoph Hugenschmidt
(TUM)
16/06/2015, 11:00
In solid state physics and surface science the positron is applied as a highly mobile nano-probe for the detection of vacancy-like defects and their chemical surrounding in a non-destructive way. Positron lifetime measurements with pulsed beams allow the identification of different types of vacancies. Benefitting from the elemental sensitivity and selectivity of the positron, buried metallic...
Dr
Anatoly V. Berezkin
(Technische Universität München, Physik-Department, Fachgebiet Physik weicher Materie)
16/06/2015, 11:22
Solvent vapor annealing (SVA) is an efficient technique to refine and control the structure of ordered block copolymer films, promising as functional templates for nanolithography and membrane preparation. SVA was simulated in the case of intermediate A/B block segregation and fast solvent evaporation. Under these conditions, the domain orientation is controlled by the solvent selectivity. If...
Lorenz Bießmann
(TU München, Physik-Department E13)
16/06/2015, 16:40
Poster
White organic light-emitting diodes (WOLEDs) hold high potential for room lighting, display technology and beyond. By using specific phosphors the internal quantum efficiency of OLEDs reaches values close to 1 but the overall efficiency is still reduced by insufficient photon extraction. A common way to overcome this lack of efficiency is the insertion of scattering centers to the device....
Mr
Lin Song
(TU München, Physik-Department E13, Lehrstuhl für Funktionelle Materialien)
16/06/2015, 16:40
Poster
Spray coating has received immense attention for the film deposition because it is simple, low cost, and usable for large-scale production. In the present work, this technique is employed to fabricate titania films for solid-state dye-sensitized solar cells (ssDSSCs) which use solid-state hole-transporting materials (HTM) for dye regeneration and hole transport. ssDSSCs, consisting of organic...
Margarita Dyakonova
(TU München)
16/06/2015, 11:44
The mechanical properties of hydrogels formed by block copolymers with charged blocks are very sensitive to pH value. Using small-angle neutron scattering, we have investigated the structures of a triblock polyampholyte having negatively and positively charged blocks in dependence on the pH value and salt content. pH variation alters the charge densities of the ionizable blocks and thus the...
Dr
Sultan Demirdis
(Forschungszentrum Julich GmbH, Julich Center for Neutron Science , JCNS at MLZ)
16/06/2015, 11:20
Small-angle neutron scattering reveals the presence of an ordered vortex solid phase in high quality optimally doped single crystalline (Ba1-xKx)Fe2As2. Vortex solid Bragg peaks are not described by the Bragg glass prediction. Simultaneously, the vortex solid structure factor shows a sharp drop as function of magnetic field, that is correlated with the second peak feature in isothermal...
Mr
Ali Özkü
(Lehrstuhl für Funktionelle Materialien, Department für Physik E13, TU München)
16/06/2015, 16:40
Poster
Organic photovoltaics using thin polymer films to convert light to electric energy are gaining interest as a promising alternative to conventional solar cells. Potential advantages include low-cost production processes, material availability and device flexibility, but power conversion efficiencies are still comparatively low. Several methods have been described to enhance the cell...
Mr
Erxi Feng
(Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH Outstation at MLZ)
18/06/2015, 09:12
Mr
Lukas Oesinghaus
(TUM)
16/06/2015, 16:40
Poster
In recent years lead halide perovskites, especially those based on methylammonium lead iodide (MAPbI3), have attracted increasing attention as a new solar cell material due to a rapid increase in the power conversion efficiency (PCE) from 3.9% in 2009 to 20.1% in 2015 for solar cells fabricated with MAPbI3 as the active layer. Despite the quick increase in PCE the relationship between...
Prof.
Thomas Brückel
(Forschungszentrum Jülich GmbH)
17/06/2015, 20:00
Material Science
Plenary talk (only invited speakers)
Research with neutrons in Europe is undergoing severe changes. While several medium flux research reactors have been decommissioned, construction of the world’s most powerful pulsed spallation source has started in Lund. At JCNS we are considering several alternative routes where the entire chain from particle source through particle accelerator, target, moderator, reflector, shielding, beam...
Prof.
Thomas Brückel
(Forschungszentrum Jülich GmbH)
15/06/2015, 14:30
General topics
P Kadletz
Structure
Plenary talk (only invited speakers)
Ni-Ti shape memory alloys (SMAs) are used for medical and engineering applications with increasing commercial success. Despite their technological importance, the elastic behaviour of the monoclinic B19’ martensite phase remains elusive, because martensite single crystals are not available for mechanical testing. DFT calculations have provided elastic constants for 0 K involving a monoclinic...
