@article{42953, author = {{Cara, Eleonora and Hönicke, Philipp and Kayser, Yves and Lindner, Jörg K. N. and Castellino, Micaela and Murataj, Irdi and Porro, Samuele and Angelini, Angelo and De Leo, Natascia and Pirri, Candido Fabrizio and Beckhoff, Burkhard and Boarino, Luca and Ferrarese Lupi, Federico}}, issn = {{2637-6105}}, journal = {{ACS Applied Polymer Materials}}, keywords = {{Organic Chemistry, Polymers and Plastics, Process Chemistry and Technology}}, number = {{3}}, pages = {{2079--2087}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Developing Quantitative Nondestructive Characterization of Nanomaterials: A Case Study on Sequential Infiltration Synthesis of Block Copolymers}}}, doi = {{10.1021/acsapm.2c02094}}, volume = {{5}}, year = {{2023}}, } @inproceedings{43189, abstract = {{The nonlinear optical response of quantum well excitons is investigated experimentally using polarization resolved four wave mixing, optical-pump optical-probe, and optical-pump Terahertz-probe spectroscopy. The four-wave mixing data reveal clear signatures of coherent biexcitons which concur with straight-forward polarization selection rules at the Γ point. The type-I samples show the well-established time-domain beating signatures in the transients as well as the corresponding spectral signatures clearly. The latter are also present in type-II samples; however, the smaller exciton and biexciton binding energies in these structures infer longer beating times which, in turn, are accompanied by faster dephasing of the type-II exciton coherences. Furthermore, the THz absorption following spectrally narrow, picosecond excitation at energies in the vicinity of the 1s exciton resonance are discussed. Here, the optical signatures yield the well-established redshifts and blueshifts for the appropriate polarization geometries in type-I quantum well samples also termed “AC Stark Effect”. The THz probe reveals intriguing spectral features which can be ascribed to coherent negative absorption following an excitation into a virtual state for an excitation below the 1s exciton resonance. Furthermore, the scattering and ionization of excitons is discussed for several excitation geometries yielding control rules for elastic and inelastic quasiparticle collisions.}}, author = {{Meier, Torsten and Stein, M. and Schäfer, F. and Anders, D. and Littmann, J. H. and Fey, M. and Trautmann, Alexander and Ngo, C. and Steiner, J. T. and Reichelt, Matthias and Fuchs, C. and Volz, K. and Chatterjee, S.}}, booktitle = {{Ultrafast Phenomena and Nanophotonics XXVII}}, publisher = {{SPIE }}, title = {{{Experimental studies of the excitonic nonlinear response of GaAs-based type-I and type-II quantum well structures interacting with optical and terahertz fields}}}, doi = {{10.1117/12.2650291}}, volume = {{12419}}, year = {{2023}}, } @inproceedings{43191, abstract = {{Anomalous currents refer to electronic currents that flow perpendicularly to the direction of the accelerating electric field. Such anomalous currents can be generated when Terahertz fields are applied after an optical interband excitation of GaAs quantum wells. The underlying processes are investigated by numerical solutions of the semiconductor Bloch equations in the length gauge. Excitonic effects are included by treating the manybody Coulomb interaction in time-dependent Hartree-Fock approximation and additionally also carrier-phonon scattering processes are considered. The band structure and matrix elements are obtained from a 14-band k · p model within the envelope function approximation. The random phase factors of the matrix elements that appear due to the separate numerical diagonalization at each k-point are treated by applying a smooth gauge transformation. We present the macroscopic Berry curvature and anomalous current transients with and without excitonic effects. It is demonstrated that the resonant optical excitation of excitonic resonances can significantly enhance the Berry curvature and the anomalous currents.}}, author = {{Meier, Torsten and Ngo, C. and Priyadarshi, S. and Duc, H. T. and Bieler, M.}}, booktitle = {{Ultrafast Phenomena and Nanophotonics XXVII}}, publisher = {{SPIE}}, title = {{{Terahertz-induced anomalous currents following the optical excitation of excitons in semiconductor quantum wells}}}, doi = {{10.1117/12.2646022}}, volume = {{12419}}, year = {{2023}}, } @inproceedings{43190, abstract = {{The nonlinear optical response of quantum well excitons excited by optical fields is analyzed by numerical solutions of the semiconductor Bloch equations. Differential absorption spectra are computed for resonant pumping at the exciton resonance and the dependence of the absorption changes on the polarization directions of the pump and probe pulses is investigated. Coherent biexcitonic many-body correlations are included in our approach up to third-order in the optical fields. Results are presented for spatially-direct type-I and spatiallyindirect type-II quantum well systems. Due to the spatial inhomogeneity, in type-II structures a finite coupling between excitons of opposite spins exists already on the Hartree-Fock level and contributes to the absorption changes for the case of opposite circularly polarized pump and probe pulses.}}, author = {{Meier, Torsten and Trautmann, Alexander and Stein, M. and Schäfer, F. and Anders, D. and Ngo, C. and Steiner, J. T. and Reichelt, Matthias and Chatterjee, S.}}, booktitle = {{Ultrafast Phenomena and Nanophotonics XXVII}}, publisher = {{SPIE}}, title = {{{Analysis of the nonlinear optical response of excitons in type-I and type-II quantum wells including many-body correlations}}}, doi = {{10.1117/12.2650169}}, volume = {{12419}}, year = {{2023}}, } @article{43139, author = {{Meier, Torsten and Schäfer, F. and Stein, M. and Lorenz, J. and Dobener, F. and Ngo, C. and Steiner, J. T. and Fuchs, C. and Stolz, W. and Volz, K. and Hader, J. and Moloney, J.V. and Koch, S.W. and Chatterjee, S.}}, journal = {{Applied Physics Letters}}, number = {{8}}, title = {{{Gain recovery dynamics in active type-II semiconductor heterostructures}}}, doi = {{10.1063/5.0128777}}, volume = {{122}}, year = {{2023}}, } @unpublished{43132, author = {{Meier, Torsten and Grisard, S. and Trifonov, A.V. and Rose, Hendrik and Reichhardt, R. and Reichelt, Matthias and Schneider, C. and Kamp, M. and Höfling, S. and Bayer, M. and Akimov, I.A}}, booktitle = {{arxiv:2302.02480}}, title = {{{Temporal sorting of optical multi-wave-mixing processes in semiconductor quantum dots}}}, year = {{2023}}, } @article{44050, author = {{Sperling, Jan and Agudelo, Elizabeth}}, issn = {{2469-9926}}, journal = {{Physical Review A}}, number = {{4}}, publisher = {{American Physical Society (APS)}}, title = {{{Entanglement of particles versus entanglement of fields: Independent quantum resources}}}, doi = {{10.1103/physreva.107.042420}}, volume = {{107}}, year = {{2023}}, } @article{40477, author = {{Sperling, Jan and Gianani, Ilaria and Barbieri, Marco and Agudelo, Elizabeth}}, issn = {{2469-9926}}, journal = {{Physical Review A}}, number = {{1}}, publisher = {{American Physical Society (APS)}}, title = {{{Detector entanglement: Quasidistributions for Bell-state measurements}}}, doi = {{10.1103/physreva.107.012426}}, volume = {{107}}, year = {{2023}}, } @article{42973, author = {{Lüders, Carolin and Pukrop, Matthias and Barkhausen, Franziska and Rozas, Elena and Schneider, Christian and Höfling, Sven and Sperling, Jan and Schumacher, Stefan and Aßmann, Marc}}, issn = {{0031-9007}}, journal = {{Physical Review Letters}}, keywords = {{General Physics and Astronomy}}, number = {{11}}, publisher = {{American Physical Society (APS)}}, title = {{{Tracking Quantum Coherence in Polariton Condensates with Time-Resolved Tomography}}}, doi = {{10.1103/physrevlett.130.113601}}, volume = {{130}}, year = {{2023}}, } @book{44083, author = {{Bauer, Anna Brigitte}}, isbn = {{978-3-8325-5625-9}}, publisher = {{Logos Verlag Berlin GmbH}}, title = {{{Experimentelle Kompetenz Physikstudierender. Entwicklung und erste Erprobung eines performanzorientierten Kompetenzstrukturmodells unter Nutzung qualitativer Methoden}}}, doi = {{10.30819/5625}}, volume = {{352}}, year = {{2023}}, } @article{43457, abstract = {{The production of hydrogen and the utilization of biomass for sustainable concepts of energy conversion and storage require gas sensors that discriminate between hydrogen (H2) and carbon monoxide (CO). Mesoporous copper–ceria (Cu–CeO2) materials with large specific surface areas and uniform porosity are prepared by nanocasting, and their textural properties are characterized by N2 physisorption, powder XRD, scanning electron microscopy, transmission electron microscopy, and energy-dispersive X-ray spectroscopy. The oxidation states of copper (Cu+, Cu2+) and cerium (Ce3+, Ce4+) are investigated by XPS. The materials are used as resistive gas sensors for H2 and CO. The sensors show a stronger response to CO than to H2 and low cross-sensitivity to humidity. Copper turns out to be a necessary component; copper-free ceria materials prepared by the same method show only poor sensing performance. By measuring both gases (CO and H2) simultaneously, it is shown that this behavior can be utilized for selective sensing of CO in the presence of H2.}}, author = {{Baier, Dominik and Priamushko, Tatiana and Weinberger, Christian and Kleitz, Freddy and Tiemann, Michael}}, issn = {{2379-3694}}, journal = {{ACS Sensors}}, keywords = {{Fluid Flow and Transfer Processes, Process Chemistry and Technology, Instrumentation, Bioengineering}}, number = {{4}}, pages = {{1616 -- 1623}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Selective Discrimination between CO and H2 with Copper–Ceria-Resistive Gas Sensors}}}, doi = {{10.1021/acssensors.2c02739}}, volume = {{8}}, year = {{2023}}, } @article{40981, abstract = {{Room temperature sodium-sulfur (RT Na-S) batteries are considered potential candidates for stationary power storage applications due to their low cost, broad active material availability and low toxicity. Challenges, such as high volume expansion of the S-cathode upon discharge, low electronic conductivity of S as active material and herewith limited rate capability as well as the shuttling of polysulfides (PSs) as intermediates often impede the cycle stability and practical application of Na-S batteries. Sulfurized poly(acrylonitrile) (SPAN) inherently inhibits the shuttling of PSs and shows compatibility with carbonate-based electrolytes, however, its exact redox mechanism remained unclear to date. Herein, we implement a commercially available and simple electrolyte into the Na-SPAN cell chemistry and demonstrate its high rate and cycle stability. Through the application of in situ techniques utilizing electronic impedance spectroscopy (EIS) and X-ray absorption spectroscopy (XAS) at different depths of charge and discharge, an insight into SPAN’s redox chemistry is obtained.}}, author = {{Kappler, Julian and Tonbul, Güldeniz and Schoch, Roland and Murugan, Saravanakumar and Nowakowski, Michał and Lange, Pia Lena and Klostermann, Sina Vanessa and Bauer, Matthias and Schleid, Thomas and Kästner, Johannes and Buchmeiser, Michael Rudolf}}, issn = {{0013-4651}}, journal = {{Journal of The Electrochemical Society}}, keywords = {{Materials Chemistry, Electrochemistry, Surfaces, Coatings and Films, Condensed Matter Physics, Renewable Energy, Sustainability and the Environment, Electronic, Optical and Magnetic Materials}}, number = {{1}}, publisher = {{The Electrochemical Society}}, title = {{{Understanding the Redox Mechanism of Sulfurized Poly(acrylonitrile) as Highly Rate and Cycle Stable Cathode Material for Sodium-Sulfur Batteries}}}, doi = {{10.1149/1945-7111/acb2fa}}, volume = {{170}}, year = {{2023}}, } @inproceedings{44380, author = {{Tonbul, Güldeniz and Kappler, Julian and Murugan, Saravanakumar and Schoch, Roland and Nowakowski, Michal and Lange, Pia and Bauer, Matthias and Buchmeiser, Michael R.}}, location = {{Aachen}}, title = {{{Characterization of Na-S Battery System Using X-ray Absorption Spectroscopy}}}, year = {{2023}}, } @article{44477, author = {{Küster, Christine and Klünder, Nina and Wagenknecht, Inga}}, issn = {{2626-0913}}, journal = {{Hauswirtschaft und Wissenschaft}}, pages = {{1--12}}, publisher = {{Deutsche Gesellschaft für Hauswirtschaft e.V.}}, title = {{{Haushaltswissenschaft – Eine Diskussionsgrundlage}}}, doi = {{ 10.23782/HUW_09_2023}}, volume = {{71}}, year = {{2023}}, } @article{42517, author = {{Tapio, Kosti and Kielar, Charlotte and Parikka, Johannes M. and Keller, Adrian and Järvinen, Heini and Fahmy, Karim and Toppari, J. Jussi}}, issn = {{0897-4756}}, journal = {{Chemistry of Materials}}, keywords = {{Materials Chemistry, General Chemical Engineering, General Chemistry}}, pages = {{1961–1971}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Large-Scale Formation of DNA Origami Lattices on Silicon}}}, doi = {{10.1021/acs.chemmater.2c03190}}, volume = {{35}}, year = {{2023}}, } @article{42518, author = {{Pothineni, Bhanu Kiran and Keller, Adrian}}, issn = {{2699-9307}}, journal = {{Advanced NanoBiomed Research}}, keywords = {{General Medicine}}, publisher = {{Wiley}}, title = {{{Nanoparticle‐Based Formulations of Glycopeptide Antibiotics: A Means for Overcoming Vancomycin Resistance in Bacterial Pathogens?}}}, doi = {{10.1002/anbr.202200134}}, volume = {{3}}, year = {{2023}}, } @article{44503, author = {{Hanke, Marcel and Tomm, Emilia and Grundmeier, Guido and Keller, Adrian}}, issn = {{1439-4227}}, journal = {{ChemBioChem}}, keywords = {{Organic Chemistry, Molecular Biology, Molecular Medicine, Biochemistry}}, publisher = {{Wiley}}, title = {{{Effect of Ionic Strength on the Thermal Stability of DNA Origami Nanostructures}}}, doi = {{10.1002/cbic.202300338}}, year = {{2023}}, } @article{44504, author = {{Linko, Veikko and Keller, Adrian}}, issn = {{1613-6810}}, journal = {{Small}}, keywords = {{Biomaterials, Biotechnology, General Materials Science, General Chemistry}}, publisher = {{Wiley}}, title = {{{Stability of DNA Origami Nanostructures in Physiological Media: The Role of Molecular Interactions}}}, doi = {{10.1002/smll.202301935}}, year = {{2023}}, } @article{44523, author = {{Paradies, Jan}}, issn = {{0001-4842}}, journal = {{Accounts of Chemical Research}}, keywords = {{General Medicine, General Chemistry}}, number = {{7}}, pages = {{821--834}}, publisher = {{American Chemical Society (ACS)}}, title = {{{Structure–Reactivity Relationships in Borane-Based FLP-Catalyzed Hydrogenations, Dehydrogenations, and Cycloisomerizations}}}, doi = {{10.1021/acs.accounts.2c00832}}, volume = {{56}}, year = {{2023}}, } @book{44524, editor = {{Meier-Gräwe, Uta and Praetorius, Ina and Tecklenburg, Feline}}, isbn = {{9783847425922}}, pages = {{307}}, publisher = {{Verlag Barbara Budrich}}, title = {{{Wirtschaft neu ausrichten. Care-Initiativen in Deutschland, Österreich und der Schweiz.}}}, year = {{2023}}, }