@article{41049, author = {{Hoffmann, Alexander and Stanek, Julia and Dicke, Benjamin and Peters, Laurens and Grimm‐Lebsanft, Benjamin and Wetzel, Alina and Jesser, Anton and Bauer, Matthias and Gnida, Manuel and Meyer‐Klaucke, Wolfram and Rübhausen, Michael and Herres‐Pawlis, Sonja}}, issn = {{1434-1948}}, journal = {{European Journal of Inorganic Chemistry}}, keywords = {{Inorganic Chemistry}}, number = {{29}}, pages = {{4731--4743}}, publisher = {{Wiley}}, title = {{{Implications of Guanidine Substitution on Copper Complexes as Entatic‐State Models}}}, doi = {{10.1002/ejic.201600655}}, volume = {{2016}}, year = {{2016}}, } @article{41047, author = {{Kalinko, Aleksandr and Bauer, Matthias and Timoshenko, Janis and Kuzmin, Alexei}}, issn = {{0031-8949}}, journal = {{Physica Scripta}}, keywords = {{Condensed Matter Physics, Mathematical Physics, Atomic and Molecular Physics, and Optics}}, number = {{11}}, publisher = {{IOP Publishing}}, title = {{{Molecular dynamics and reverse Monte Carlo modeling of scheelite-type AWO4(A = Ca, Sr, Ba) WL3-edge EXAFS spectra}}}, doi = {{10.1088/0031-8949/91/11/114001}}, volume = {{91}}, year = {{2016}}, } @article{41838, abstract = {{Significance The hierarchical assembly pathway of the cytoskeletal protein vimentin may be responsible for the astonishing mechanical properties of the emerging filaments, such as high flexibility and extensibility, and thus play a key role in cellular mechanics. A two-step assembly mechanism, involving a lateral and a subsequent elongational step, has been established; however, the elongational step could not be followed in solution. Here, we show direct in situ observation and modeling of the elongation reaction of the filaments on the relevant length and time scales, using time-resolved, multiangle static and dynamic light scattering. We thus achieve sufficient spatio-temporal resolution without the need of labeling, staining, or adsorption to substrates.}}, author = {{Lopez, Carlos G. and Saldanha, Oliva and Huber, Klaus and Köster, Sarah}}, issn = {{0027-8424}}, journal = {{Proceedings of the National Academy of Sciences}}, keywords = {{Multidisciplinary}}, number = {{40}}, pages = {{11152--11157}}, publisher = {{Proceedings of the National Academy of Sciences}}, title = {{{Lateral association and elongation of vimentin intermediate filament proteins: A time-resolved light-scattering study}}}, doi = {{10.1073/pnas.1606372113}}, volume = {{113}}, year = {{2016}}, } @article{41839, author = {{Saha, Sanjib and Springer, Sergej and Schweinefuß, Maria E. and Pontoni, Diego and Wiebcke, Michael and Huber, Klaus}}, issn = {{1528-7483}}, journal = {{Crystal Growth & Design}}, keywords = {{Condensed Matter Physics, General Materials Science, General Chemistry}}, number = {{4}}, pages = {{2002--2010}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Insight into Fast Nucleation and Growth of Zeolitic Imidazolate Framework-71 by In Situ Time-Resolved Light and X-ray Scattering Experiments}}}, doi = {{10.1021/acs.cgd.5b01594}}, volume = {{16}}, year = {{2016}}, } @article{41837, author = {{Ezhova, Anna and Huber, Klaus}}, issn = {{0024-9297}}, journal = {{Macromolecules}}, keywords = {{Materials Chemistry, Inorganic Chemistry, Polymers and Plastics, Organic Chemistry}}, number = {{19}}, pages = {{7460--7468}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Contraction and Coagulation of Spherical Polyelectrolyte Brushes in the Presence of Ag+, Mg2+, and Ca2+ Cations}}}, doi = {{10.1021/acs.macromol.6b01286}}, volume = {{49}}, year = {{2016}}, } @article{41840, author = {{Goerigk, Guenter and Lages, Sebastian and Huber, Klaus}}, issn = {{2073-4360}}, journal = {{Polymers}}, keywords = {{Polymers and Plastics, General Chemistry}}, number = {{3}}, publisher = {{MDPI AG}}, title = {{{Systematic Limitations in Concentration Analysis via Anomalous Small-Angle X-ray Scattering in the Small Structure Limit}}}, doi = {{10.3390/polym8030085}}, volume = {{8}}, year = {{2016}}, } @article{31741, author = {{Douw, L and Leveroni, CL and Tanaka, N and Emerton, BC and Cole, AJ and Reinsberger, Claus and Stufflebeam, SM}}, issn = {{1932-6203}}, journal = {{PLoS One}}, number = {{2}}, pages = {{e0148664}}, title = {{{Loss of Resting-State Posterior Cingulate Flexibility Is Associated with Memory Disturbance in Left Temporal Lobe Epilepsy.}}}, volume = {{11}}, year = {{2016}}, } @inbook{36381, author = {{Barthel, Thorsten and van den Bongard, Franziska and Ströhlein, Julia Kristin and Reinsberger, Claus}}, booktitle = {{Körperliche Aktivität und Gesundheit}}, isbn = {{9783662503348}}, publisher = {{Springer Berlin Heidelberg}}, title = {{{Bewegung und neurologische Erkrankungen}}}, doi = {{10.1007/978-3-662-50335-5_24}}, year = {{2016}}, } @article{25919, abstract = {{The sorption properties of mixed-linker CAU-10 type metal organic frameworks (MOFs), [Al(OH)(1,3-BDC-X)n(1,3-BDC-SO3H)m] with 1,3-BDC = 1,3-benzenedicarboxyliate, X = H, NO2 or OH, 0.76 ≤ n ≤ 0.89 and 0.11 ≤ m ≤ 0.24, can be varied by surface modification through variation of the respective linker molecules. It is thus possible to design surface-modified CAU-10 type MOFs with variable affinity and accessibility of the pores for water vapour. When used as a dielectric in a capacitor, the MOF material will change its permittivity depending on the amount of physisorbed water; this is the working principle of capacitive humidity sensors. Three different mixed-linker compounds with CAU-10 structure are compared regarding their water sorption and impedance characteristics. A setup was developed allowing the characterization of the MOF samples under exposure to different relative humidity values in air by impedance spectroscopy. Interpretation of the results by means of standard models shows that the MOFs are qualified for functional layers of capacitive humidity sensors. Since the prepared MOFs are more temperature-stable than many commonly used polymers they offer the potential to build a new generation of high-temperature (up to 350 °C) humidity sensors.}}, author = {{Weiss, Alexander and Reimer, Nele and Stock, Norbert and Tiemann, Michael and Wagner, Thorsten}}, issn = {{1387-1811}}, journal = {{Microporous and Mesoporous Materials}}, pages = {{39--43}}, title = {{{Screening of mixed-linker CAU-10 MOF materials for humidity sensing by impedance spectroscopy}}}, doi = {{10.1016/j.micromeso.2015.08.020}}, year = {{2016}}, } @article{13917, abstract = {{We present the synthesis of indium oxide (In2O3) inverse opal films with photonic stop bands in the visible range by a structure replication method. Artificial opal films made of poly(methyl methacrylate) (PMMA) spheres are utilized as template. The opal films are deposited via sedimentation facilitated by ultrasonication, and then impregnated by indium nitrate solution, which is thermally converted to In2O3 after drying. The quality of the resulting inverse opal film depends on many parameters; in this study the water content of the indium nitrate/PMMA composite after drying is investigated. Comparison of the reflectance spectra recorded by vis-spectroscopy with simulated data shows a good agreement between the peak position and calculated stop band positions for the inverse opals. This synthesis is less complex and highly efficient compared to most other techniques and is suitable for use in many applications.}}, author = {{Amrehn, Sabrina and Berghoff, Daniel and Nikitin, Andreas and Reichelt, Matthias and Wu, Xia and Meier, Torsten and Wagner, Thorsten}}, issn = {{1569-4410}}, journal = {{Photonics and Nanostructures - Fundamentals and Applications}}, pages = {{55--63}}, title = {{{Indium oxide inverse opal films synthesized by structure replication method}}}, doi = {{10.1016/j.photonics.2016.02.005}}, volume = {{19}}, year = {{2016}}, } @article{13915, abstract = {{The dynamics of a pair of harmonic oscillators represented by three-dimensional fields coupled with a repulsive cubic nonlinearity is investigated through direct simulations of the respective field equations and with the help of the finite-mode Galerkin approximation (GA), which represents the two interacting fields by a superposition of 3+3 harmonic-oscillator p-wave eigenfunctions with orbital and magnetic quantum numbers l=1 and m=1, 0, −1. The system can be implemented in binary Bose-Einstein condensates, demonstrating the potential of the atomic condensates to emulate various complex modes predicted by classical field theories. First, the GA very accurately predicts a broadly degenerate set of the system's ground states in the p-wave manifold, in the form of complexes built of a dipole coaxial with another dipole or vortex, as well as complexes built of mutually orthogonal dipoles. Next, pairs of noncoaxial vortices and/or dipoles, including pairs of mutually perpendicular vortices, develop remarkably stable dynamical regimes, which feature periodic exchange of the angular momentum and periodic switching between dipoles and vortices. For a moderately strong nonlinearity, simulations of the coupled-field equations agree very well with results produced by the GA, demonstrating that the dynamics is accurately spanned by the set of six modes limited to l=1.}}, author = {{Driben, R. and Konotop, V. V. and Malomed, B. A. and Meier, Torsten}}, issn = {{2470-0045}}, journal = {{Physical Review E}}, number = {{1}}, title = {{{Dynamics of dipoles and vortices in nonlinearly coupled three-dimensional field oscillators}}}, doi = {{10.1103/physreve.94.012207}}, volume = {{94}}, year = {{2016}}, } @inproceedings{13918, author = {{Podzimski, Reinold and Duc, Huynh Thanh and Priyadarshi, Shekhar and Schmidt, Christian and Bieler, Mark and Meier, Torsten}}, booktitle = {{Ultrafast Phenomena and Nanophotonics XX}}, editor = {{Betz, Markus and Elezzabi, Abdulhakem Y.}}, publisher = {{SPIE}}, title = {{{Photocurrents in semiconductors and semiconductor quantum wells analyzed by k.p-based Bloch equations}}}, doi = {{10.1117/12.2208572}}, volume = {{9746}}, year = {{2016}}, } @article{25917, abstract = {{Ordered, bimodal mesoporous CMK-5 carbon is prepared by using mesoporous SBA-15 silica as a structural mold. The carbon material is chemically modified by oxidative treatment with acidic persulfate solution. This leads to the creation of oxygen-containing functionalities at the pore walls of the carbon (up to 13 wt% oxygen), as confirmed by IR spectroscopy. The oxidative treatment is carried out before removal of the silica mold which ensures that only one of the two distinct modes of mesopores (namely, the intra-tubular pores) is affected; the other mode (inter-tubular pores) is protected from oxidation by the presence of the silica mold. This is proven by water vapor physisorption analysis. The oxidatively treated (intra-tubular) pores are significantly more polar and, hence, better wettable than the untreated (inter-tubular) pores.}}, author = {{Weinberger, Christian and Cao, X. and Tiemann, Michael}}, issn = {{2050-7488}}, journal = {{Journal of Materials Chemistry A}}, pages = {{18426--18431}}, title = {{{Selective surface modification in bimodal mesoporous CMK-5 carbon}}}, doi = {{10.1039/c6ta07772b}}, year = {{2016}}, } @article{25918, abstract = {{Characterization and application of (meso)porous materials often require information about the density of the respective samples. For example, the BET surface area is, by definition, normalized to the sample mass; hence, any comparison between samples of different composition needs to take into account their respective densities. Literature data on the densities of porous materials are scarce. Frequently, only bulk-phase densities are available which sometimes differ from those of porous samples, especially for amorphous systems, such as silica or carbon. The apparent density, i.e. the density of the sample excluding the gas-accessible pore volume, is typically determined by helium gas pycnometry utilizing specialized pycnometers. We demonstrate how to obtain the same data from standard N2 physisorption measurements as part of the regular measurement routine. We evaluate the method by reference measurements utilizing a non-porous reference sample (glass rod) to confirm the validity of the method. Then we present results on apparent density measurements of several mesoporous silica materials (MCM-41, MCM-48, SBA-15, KIT-6), mesoporous carbon (CMK-3, -5, -8, -9), and a variety of mesoporous metal oxides obtained by nanocasting.}}, author = {{Weinberger, Christian and Vetter, Simon and Tiemann, Michael and Wagner, Thorsten}}, issn = {{1387-1811}}, journal = {{Microporous and Mesoporous Materials}}, pages = {{53--57}}, title = {{{Assessment of the density of (meso)porous materials from standard volumetric physisorption data}}}, doi = {{10.1016/j.micromeso.2015.10.027}}, year = {{2016}}, } @article{22942, abstract = {{A microscopic approach that is based on the multisubband semiconductor Bloch equations formulated in the basis of a 14-band k⋅p model is employed to compute the temporal dynamics of photocurrents in GaAs quantum wells following excitation with femtosecond laser pulses. This approach provides a transparent description of the interband, intersubband, and intraband excitations, fully includes all resonant as well as off-resonant excitations, and treats the light-matter interaction nonperturbatively. For linearly polarized excitations, the photocurrents contain contributions from shift and rectification currents. We numerically compute and analyze these currents generated by excitation with femtosecond laser pulses for [110]- and [111]-oriented GaAs quantum wells. It is shown that the often employed perturbative χ(2) approach breaks down for peak fields larger than about 10 kV/cm, and that nonperturbative effects lead to a reduction of the peak values of the shift and rectification currents and to temporal oscillations that originate from Rabi flopping. In particular, we find a complex oscillatory photon energy dependence of the magnitudes of the shift and rectification currents. Our simulations demonstrate that this dependence is the result of mixing between the heavy- and light-hole valence bands. This is a surprising finding since the band mixing has an even larger influence on the strength of the photocurrents than the absorption coefficient. For [110]-oriented GaAs quantum wells, the calculated photon energy dependence is compared to experimental results, and good agreement is obtained. This validates our theoretical approach.}}, author = {{Duc, Huynh Thanh and Podzimski, Reinold and Priyadarshi, Shekhar and Bieler, Mark and Meier, Torsten}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{8}}, publisher = {{American Physical Society}}, title = {{{Ultrafast shift and rectification photocurrents in GaAs quantum wells: Excitation intensity dependence and the importance of band mixing}}}, doi = {{10.1103/physrevb.94.085305}}, volume = {{94}}, year = {{2016}}, } @article{13916, abstract = {{Nonlinearity is the driving force for numerous important effects in nature typically showing transitions between different regimes, regular, chaotic or catastrophic behavior. Localized nonlinear modes have been the focus of intense research in areas such as fluid and gas dynamics, photonics, atomic and solid state physics etc. Due to the richness of the behavior of nonlinear systems and due to the severe numerical demands of accurate three-dimensional (3D) numerical simulations presently only little knowledge is available on the dynamics of complex nonlinear modes in 3D. Here, we investigate the dynamics of 3D non-coaxial matter wave vortices that are trapped in a parabolic potential and interact via a repulsive nonlinearity. Our numerical simulations demonstrate the existence of an unexpected and fascinating nonlinear regime that starts immediately when the nonlinearity is switched-on and is characterized by a smooth dynamics representing torque-free precession with nutations. The reported motion is proven to be robust regarding various effects such as the number of particles, dissipation and trap deformations and thus should be observable in suitably designed experiments. Since our theoretical approach, i.e., coupled nonlinear Schrödinger equations, is quite generic, we expect that the obtained novel dynamical behavior should also exist in other nonlinear systems.}}, author = {{Driben, R. and Konotop, V. V. and Meier, Torsten}}, issn = {{2045-2322}}, journal = {{Scientific Reports}}, title = {{{Precession and nutation dynamics of nonlinearly coupled non-coaxial three-dimensional matter wave vortices}}}, doi = {{10.1038/srep22758}}, volume = {{6}}, year = {{2016}}, } @article{13920, abstract = {{We investigate the transient optical response in high-quality Cd0.88Zn0.12Te crystals in the regime of slow light propagation on the lower exciton-polariton branch. Femtosecond photoexcitation leads to very substantial transmission changes in a ∼10-meV broad spectral range within the transparency window of the unexcited semiconductor. These nonlinear optical signatures decay on picosecond time scales governed by carrier thermalization and recombination. The temporal and spectral dependence indicate the dynamical optical response as arising from excitation-induced dephasing and perturbed free induction decay. Model simulations for the optical response taking into account the actual exciton-polariton dispersion and excitation-induced dephasing of a nonlinearly driven two-level system support this interpretation.}}, author = {{Lohrenz, J. and Melzer, S. and Ruppert, C. and Akimov, I. A. and Mariette, H. and Reichelt, Matthias and Trautmann, Alexander and Meier, Torsten and Betz, M.}}, issn = {{2469-9950}}, journal = {{Physical Review B}}, number = {{7}}, title = {{{Ultrafast dynamical response of the lower exciton-polariton branch in CdZnTe}}}, doi = {{10.1103/physrevb.93.075201}}, volume = {{93}}, year = {{2016}}, } @inbook{45496, author = {{Vogelsang, Christoph and Borowski, Andreas and Fischer, Hans E. and Kulgemeyer, Christoph and Reinhold, Peter and Riese, Josef and Schecker, Horst}}, booktitle = {{Modeling and Measuring Competencies in Higher Education – Validation and Methodological Innovations (KoKoHs) – Overview of the Research Projects (KoKoHs Working Papers, 11)}}, editor = {{Pant, Hans Anand and Zlatkin-Troitschanskaia , Olga and Lautenbach, Corinna and Toepper, Miriam and Molerov, Dimitar}}, pages = {{35--38}}, title = {{{ProfiLe-P+ – Professional Competence in Academic Physics Teacher Education}}}, year = {{2016}}, } @inproceedings{45548, author = {{Riese, Josef and Gramzow, Yvonne and Reinhold, Peter}}, booktitle = {{Authentizität und Lernen - das Fach in der Fachdidaktik. Gesellschaft für Didaktik der Chemie und Physik. Jahrestagung in Berlin 2015}}, editor = {{Maurer, Christian}}, pages = {{187--189}}, title = {{{Analysen zum fachdidaktischen Wissen von angehenden Physiklehrkräften}}}, year = {{2016}}, } @inbook{45499, author = {{Vogelsang, Christoph and Borowski, Andreas and Fischer, Hans E. and Kulgemeyer, Christoph and Reinhold, Peter and Riese, Josef and Schecker, Horst}}, booktitle = {{Kompetenzmodelle und Instrumente der Kompetenzerfassung im Hochschulsektor – Validierungen und methodische Innovationen (KoKoHs): Übersicht der Forschungsprojekte (KoKoHs Working Papers, 10)}}, editor = {{Zlatkin-Troitschanskaia, Olga and Pant, Hans Anand and Lautenbach, Corinna and Toepper, Miriam}}, pages = {{39--43}}, title = {{{ProfiLe- P+ – Professionskompetenz im Lehramtsstudium Physik}}}, year = {{2016}}, }