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Technische Universität Dresden

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  • ItemOpen Access
    Data sets "Low-temperature thermal conductivity of the substrate material YAlO3 and its unconventional sister compound YbAlO3"
    (Technische Universität Dresden, 2025-09-30) Mokhtari, Parisa; Stockert, Ulrike; Nikitin, Stanislav; Vasylechko, Leonid; Brando, Manuel; Hassinger, Elena
    This archive contains the data of the article "Low-temperature thermal conductivity of the substrate material YAlO3 and its unconventional sister compound YbAlO3" by P. Mokhtari et al., published in Physical Review Materials (2025). The data published as text files. The file names specify the figure number and data set. Each text file contains data of a single experimental or calculated curve and consists of two columns separated by tabs. Data that stem from other publications are not included. Data sets that are plotted in more than one figure are provided as a separate file for each figure. Additional information can be obtained upon reasonable request from the following authors: Ulrike Stockert (ulrike.stockert@tu-dresden.de), Elena Hassinger (elena.hassinger@tu-dresden.de).
  • ItemOpen Access
    Data STM NBD
    (Technische Universität Dresden, 2024-07-15) Moresco, Francesca
    Supplementary raw STM data to the publication "Direct imaging of a norbornadiene (NBD) derivative adsorbed on the Au(111) surface"
  • ItemOpen Access
    Data STM rotor and car
    (Technische Universität Dresden, 2024-09-11) Moresco, Francesca
    Supplementary raw STM data to the publication "A Nanocar and Rotor in One Molecule" https://doi.org/10.48550/arXiv.2305.06791
  • ItemOpen Access
    Exciton diffusion in two-dimensional chiral perovskites
    (Technische Universität Dresden, 2024-11-07) Terres, Sophia; Scalon, Lucas; Brunner, Julius; Horneber, Dominik; Düreth, Johannes; Huang, Shiyu; Taniguchi, Takashi; Watanabe, Kenji; Nogueira, Ana Flávia; Höfling, Sven; Klembt, Sebastian; Vaynzof, Yana; Chernikov, Alexey
    This contains the data underpinning our recent paper on chiral 2D perovskites, uploaded on ArXiv (https://doi.org/10.48550/arXiv.2408.05946) in 2024. The abstract of the article is reproduced below: Two-dimensional (2D) organic-inorganic hybrid perovskites emerged as a versatile platform for light-emitting and photovoltaic applications due to their unique structural design and chemical flexibility. Their properties depend heavily on both the choice of the inorganic lead halide framework and the surrounding organic layers. Recently, the introduction of chiral cations into 2D perovskites has attracted major interest due to their potential for introducing chirality and tuning the chiro-optical response. Importantly, the optical properties in these materials are dominated by tightly bound excitons that also serve as primary carriers for the energy transport. The mobility of photoinjected excitons is thus important from the perspectives of fundamental material properties and optoelectronic applications, yet remains an open question. Here, we demonstrate exciton propagation in a 2D chiral perovskite methylbenzylammonium lead iodide (MBA2PbI4) using transient photoluminescence microscopy and reveal density-dependent transport over more than 100 nanometers at room temperature with diffusion coefficients as high as 2 cm2/s. We observe two distinct regimes of initially rapid diffusive propagation and subsequent localization. Moreover, perovskites with enantiomer pure cations are found to exhibit faster exciton diffusion compared to the race-mic mixture, correlated with the impact of the material composition on disorder. Altogether, the observations of efficient exciton diffusion at room temperature highlight the potential of 2D chiral perovskites to merge chiro-optical properties with strong light-matter interaction and efficient energy transport.
  • ItemOpen Access
    Measuring active fluctuations of the cortex in mitosis by embedding an AFM cantilever pyrimidal tip
    (Technische Universität Dresden, 2025-11-04) Narinder, Narinder; Elisabeth, Fischer-Friedrich
    Living cells exhibit non-equilibrium dynamics emergent from the intricate interplay between molecular motor activity and its viscoelastic cytoskeletal matrix. The deviation from thermal equilibrium can be quantified through frequency-dependent effective temperature or time-reversal symmetry breaking quantified e.g. through the Kullback-Leibler divergence. Here, we investigate the fluctuations of an AFM tip embedded within the active cortex of mitotic human cells with and without perturbations that reduce cortex activity through inhibition of material turnover or motor proteins. While inhibition of motor activity significantly reduces both effective temperature and time irreversibility, inhibited material turnover leaves the effective temperature largely unchanged but lowers the time irreversibility and entropy production rate. Our experimental findings in combination with a minimal model highlight that time irreversibility, effective temperature and entropy production rate can follow opposite trends in active living systems, challenging in particular the validity of effective temperature as a proxy for the distance from thermal equilibrium. Furthermore, we propose that the strength of thermal noise and the occurrence of time-asymmetric deflection spikes in the dynamics of regulated observables are inherently coupled in living systems, revealing a previously unrecognized link between entropy production and time irreversibility.
  • ItemOpen Access
    Mesenchymal-epithelial transition reduces proliferation but increases immune evasion in tumor spheroids
    (Technische Universität Dresden, 2025-05-23) Dimari, Gina; Hu, Yueyuan; Frenzel, Annika; Fuchs, Anke; Wurm, Alexander A.; Fischer-Friedrich, Elisabeth
    The data corresponds to experiments performed with MET-inducible models of MDA-MB-231 and ES-2 mesenchymal cell lines. These were modified to contain an inducible plasmid that codes for miR-200c and miR-141 that upon overexpression trigger the expression of epithelial features. In the first place, the collection contains transcriptomic and proteomic data suchs as RNA seq data, q-PCR data, western-blot data, and immunofluorescence of EMT markers, that were all used to characterize our models. Moving forwards, with these two models we performed proliferation assays in adherent and 3D cultures of different nature. In adherent cultures, we looked at the effect of MET on proliferation focusing on the regulation exhorted by mechanical signals such as cell-cell junctions, spread area and their influence on contact inhibition of proliferation. Most of the data acquired from these experiments were obtained by image analysis of immunofluorescent microscopy. To measure proliferation changes in 3D cultures, we cultured cells in PEG-heparin hydrogels at both degradable and non-degradable forms. This gave rise to tumor spheroids were we quantified different parameters to assess proliferation levels. Moreover, we used pharmacologycal inhibitors to study the effect of focal adhesion and actomyosin cytoskeletal signaling in the proliferation of these tumor spheroids, culture in control and MET-inducing conditions. The data from these experiments was as well obtained from image analysis from fluorescent microscopy. Furthermore, we performed co-cultures of tumor spheroids with peripheral blood mononuclear cells and quantified the changes in apoptosis in the tumor cells, both by image analysis from immunofluorescent microscopy and flow cytometry.
  • ItemOpen Access
    Monitoring data to explore particle size distribution and elemental composition in a stormwater outlet from a German urban catchment
    (Technische Universität Dresden, 2025-12-19) Benisch, Jakob; Rojas-Gómez , Karen L.; Helm, Björn; Borchardt, Dietrich; Krebs, Peter
    This repository presents a dataset comprising online monitoring turbidity and discharge data measured with a high temporal resolution at the stormwater outlet of a small urban catchment in Dresden, Germany. Additionally, for selected rainfall-runoff events, the following data were produced: total suspended solids concentrations and their particle size distribution (<63 µm: fine particles; >63 µm: coarse fraction), their elemental composition and organic content. The online monitoring data covers January 2018 - August 2022, whereas the sampled data were collected during September 2018 - 2021. These data are optimal for exploring flush dynamics, transport patterns of particles and particle-bound pollutants, and for developing and validating particle transport formulations in urban drainage models. This will allow a better identification of stormwater treatment and management strategies to effectively address different pollutant flushes, to support regulatory decision-making, and to minimise the impact of stormwater discharges on the receiving water bodies.
  • ItemOpen Access
    Original research data of “Systematic variation of the acceptor electrophilicity in donor-acceptor-donor emitters exhibiting efficient room temperature phosphorescence suited for digital luminescence"
    (Technische Universität Dresden, 2025-07-16) Tsiko, Uliana; Fidelius, Jannis; Kaiser, Sebastian; Thomas, Heidi; Bui Thi, Yana; Weigand, Jan J.; Grazulevicius, Juozas V.; Schellhammer, Karl Sebastian; Reineke, Sebastian
    Original research data to the following paper: Purely organic materials showing efficient and persistent emission via room temperature phosphorescence (RTP) allow the design of minimalistic yet powerful technological solutions for sensing, bioimaging, information storage, and safety applications using the photonic design principle of digital luminescence. Although several promising materials exist, a deep understanding of the underlying structure-property relationship and, thus, development of rational design strategies are widely missing. Some of the best purely organic emitters follow the donor-acceptor-donor design motif. In this study, the influence of the acceptor unit on the photophysical properties is systematically analyzed by synthesizing and characterizing variations of the RTP emitter 4,4′-dithianthrene-1-yl-benzophenone (BP-2TA). The most promising candidates are also tested in programmable luminescent tags as a potential application field for information storage. While no significant influence by the electrophilicity index of the acceptor moiety on the RTP emission is observed, the results support the design of molecules with pronounced hybridization as obtained for the newly synthesized emitter demonstrating superior RTP efficiency combined with improved stability.
  • ItemOpen Access
    PGT Prompt Gamma Timing PETsys data for publication at IKTP (PGT)
    (Technische Universität Dresden, 2024-05-14) Novgorodova, Olga; Straessner, Arno; Hentges, Rainer; Glatte, Andreas; Lutz, Benjamin; Roemer, Katja; Teichmann, Thobias; Koegler, Toni
    Proton therapy requires range verification in order to exploit its full potential. One of the most promising approaches is to monitor prompt gamma-rays produced by nuclear interactions of the therapeutic particles in the patient tissues. In our paper, we test PETsys electronics with a detector with a wide energy range from 100 keV to 15 MeV. We tested what time resolution we could achieve as a high time resolution is required to achieve millimetric precision in the proton range. PETsys should survive high count rates and the fraction of pile-up events should be low or separatable. We are investigating a full acceptance approach with increased granularity in order to reduce the size of the scintillators and consequently the count rate per channel. Ideally, we want to stack the scintillators in matrices that require suitable multi-channel photo-multipliers and a fitting acquisition system. Here, we present two geometries of CeBr3 crystals 5 × 5 × 20 mm3 and 10 × 10 × 30 mm3, together with modern silicon photo-multipliers (SiPM) adapted to work with the PETsys TOFPET2 ASIC. The TOFPET2 ASIC was developed for Time-of-Flight Positron Emission Tomography (TOF-PET) applications. Here are our data measured for the publication for time resolution and coincidence time resolution, energy resolution with AmBe source, and dead time studies.
  • ItemOpen Access
    RillGrowEvaluationTime-LapseSfM
    (Technische Universität Dresden, 2024-08-29) Eltner, Anette
    This project contains data for the evaluation and calibration of model outputs of several thousand runs of the soil erosion model RillGrow. For more information about the data see the read.me.
  • ItemOpen Access
    Spin-liquid-like ground states in the double hydroxyperovskites CuSn(OD)6 and MnSn(OD)6 evidenced by μSR spectroscopy
    (Technische Universität Dresden, 2026-02-27) Naskar, Moumita; Kulbakov, Anton A.; Parui, Kaushick K.; Krieger, Jonas A.; Hicken, Thomas J.; Luetkens, Hubertus; Häußler, Ellen; Doert, Thomas; Peets, Darren. C.; Klauss, Hans-Henning; Inosov, Dmytro S.; Sarkar, Rajib
    Double hydroxide perovskites with magnetic transition-metal ions were recently identified as a unique class of materials that combine magnetic frustration with correlated proton disorder—a prerequisite for quantum-disordered fluctuating magnetic ground states resembling spin liquids. Here we present the results of muon spin relaxation (μSR) measurements carried out on fully deuterated samples of the double hydroxyperovskites CuSn(OH)6 (S = 1/2) and MnSn(OH)6 (S = 5/2) over the temperature range 0.053–50 K. The absence of any long-range magnetic order is confirmed down to 0.053 K. We observe no oscillations of the muon asymmetry down to the lowest temperature. The muon relaxation rates show a continuous increase with decreasing temperature, indicating persistent spin fluctuations in both compounds. Spin correlations are consistent with homogeneous spin dynamics. These observations reinforce the assertion that both compounds have a quantum-dynamic magnetic ground state that is consistent with a spin-liquid-like phase stabilized by proton disorder.
  • ItemOpen Access
    Supplementary Material to "Geometry Dependent Localization of Surface Plasmons on Random Gold Nanoparticle Assemblies"
    (Technische Universität Dresden, 2025-01-13) Kalady, Mohammed Fayis; Lubk, Axel
    Assemblies of plasmonic nanoparticles (NPs) support hybridized modes of localized surface plasmons (LSPs), which delocalize in geometrically well-ordered arrangements. Here, the hybridization behavior of LSPs in geometrically completely disordered arrangements of Au NPs fabricated by an e-beam synthesis method is studied. Employing electron energy loss spectroscopy in a scanning transmission electron microscope in combination with numerical simulations, the disorder-driven spatial and spectral localization of the coupled LSP modes that depend on the NP thickness is revealed. Below 0.4nm sample thickness (flat NPs), localization increases towards higher hybridized LSP mode energies. In comparison, above 10nm thickness, a decrease of localization (an increase of delocalization) with higher mode energies is observed. In the intermediate thickness regime, a transition of the energy dependence of the localization between the two limiting cases, exhibiting a transition mode energy with minimal localization, is observed. This behavior is mainly driven by the energy and thickness dependence of the polarizability of the individual NPs.
  • ItemOpen Access
    Supplementary STM data on the unidirectional rotation of DMNI-P molecules on Au(111)
    (Technische Universität Dresden, 2024-09-24) Moresco, Francesca
    Supplementary raw data to the publication “Thermal with Electronic Excitation for the Unidirectional Rotation of a Molecule on a Surface” https://arxiv.org/abs/2409.05485v1 https://doi.org/10.48550/arXiv.2409.05485
  • ItemOpen Access
    Supplementary STM data on Thianthrene-based Molecules on AU(111)
    (Technische Universität Dresden, 2024-09-24) Moresco, Francesca
    Supplementary raw STM data to the publication "Tuning the Planarity of an Aromatic Thianthrene-Based Molecule on Au(111)" https://arxiv.org/abs/2409.05489v1
  • ItemOpen Access
    The WoKaS-Iso Database: Workflow for a Global Compilation of Oxygen-18 and Deuterium Records in Karst Springs and Cave Drip Water for Enhanced Understanding of Karst Systems
    (Technische Universität Dresden, 2025-12-19) Zang, Yining
    For analysing karst hydrogeological systems, observations of karst springs and cave drips are considered indispensable. In addition to hydrometric observations, knowing the oxygen and hydrogen stable isotope ratios has improved the understanding of vadose zone and aquifer dynamics, likewise supporting system characterisation and modelling. However, limited accessibility and high costs of the analysis of stable isotopes in karst aquifers have hindered progress in karst research and impeded the accurate understanding of karst processes especially when it comes to comparative or large-scale studies. In this study, we present our workflow to compile the WoKaS-Iso database, the first extensive collection of time series data for Oxygen-18 and Deuterium isotopes in karst springs and cave drip water from diverse sources, encompassing publications, theses, reports, online archives, and collaborative initiatives worldwide. The database incorporates data sourced from 236 springs and 74 caves, comprising in total 1002 time series (381 time series for the springs and 621 time series for the cave drip water). These datasets provide coverage across significant karst regions globally, spanning China, the USA, Europe, the Middle East, and Australia. Within datasets, 79% for springs and 68% for cave drip water exhibit resolutions finer than monthly intervals. In addition, by integrating isotopic records with ancillary environmental variables including spring discharge, cave drip rate, precipitation, and rainwater isotopes, the database offers a more comprehensive perspective on hydrological behaviours in karst aquifers, hence advancing hydrogeological characterisation and modelling. The WoKaS-Iso database not only deepens the understanding of the complex systems but also promotes sustainable water resource management as well as the potential to foster collaborative research.
  • ItemOpen Access
    Ultrafast switching of trions in 2D materials by terahertz photons
    (Technische Universität Dresden, 2024-11-14) Venanzi, Tommaso; Cuccu, Marzia; Perea Causin, Raul; Sun, Xiaoxiao; Brem, Samuel; Erkensten, Daniel; Taniguchi, Takashi; Watanabe, Kenji; Malic, Ermin; Helm, Manfred; Winnerl, Stephan; Chernikov, Alexey
    External control of optical excitations is key for manipulating light–matter coupling and is highly desirable for photonic technologies. Excitons in monolayer semiconductors emerged as a unique nanoscale platform in this context, offering strong light–matter coupling, spin–valley locking and exceptional tunability. Crucially, they allow electrical switching of their optical response due to efficient interactions of excitonic emitters with free charge carriers, forming new quasiparticles known as trions and Fermi polarons. However, there are major limitations to how fast the light emission of these states can be tuned, restricting the majority of applications to an essentially static regime. Here we demonstrate switching of excitonic light emitters in monolayer semiconductors on ultrafast picosecond time scales by applying short pulses in the terahertz spectral range following optical injection. The process is based on a rapid conversion of trions to excitons by absorption of terahertz photons inducing photodetachment. Monitoring time-resolved emission dynamics in optical-pump/terahertz-push experiments, we achieve the required resonance conditions as well as demonstrate tunability of the process with delay time and terahertz pulse power. Our results introduce a versatile experimental tool for fundamental research of light-emitting excitations of composite Bose–Fermi mixtures and open up pathways towards technological developments of new types of nanophotonic device based on atomically thin materials.