@article{61110,
abstract = {{By analyzing the physics of multi-photon absorption in superconducting nanowire single-photon detectors (SNSPDs), we identify physical components of jitter. From this, we formulate a quantitative physical model of the multi-photon detector response that combines the local detection mechanism and local fluctuations (hotspot formation and intrinsic jitter) with the thermoelectric dynamics of resistive domains. Our model provides an excellent description of the arrival-time histogram of a commercial SNSPD across several orders of magnitude, both in arrival-time probability and across mean photon number. This is achieved with just three fitting parameters: the scaling of the mean arrival time of voltage response pulses, as well as the Gaussian and exponential jitter components. Our findings have important implications for photon-number-resolving detector design, as well as applications requiring low jitter, such as light detection and ranging (LIDAR).}},
author = {{Sidorova, Mariia and Schapeler, Timon and Semenov, Alexej D. and Schlue, Fabian and Stefszky, Michael and Brecht, Benjamin and Silberhorn, Christine and Bartley, Tim}},
issn = {{2378-0967}},
journal = {{APL Photonics}},
keywords = {{Jitter, PNR, SNSPD}},
number = {{8}},
publisher = {{AIP Publishing}},
title = {{{Jitter in photon-number-resolved detection by superconducting nanowires}}},
doi = {{10.1063/5.0273752}},
volume = {{10}},
year = {{2025}},
}
@article{64884,
abstract = {{To address the challenges associated with poor drug solubility and uncontrolled drug release in conventional dosage forms, a combination of polymer design and advanced drug delivery approaches has been employed. The development of pH-responsive nanoparticles for controlled and selective drug release represents a notable advance in adaptive nanomedicine. This study explores the design of a pH-responsive polymer, poly(1,4-phenyleneacetone dimethylene ketal) (PPADK). Additionally, the incorporation of light-responsive ortho-nitrobenzyl groups (o-NB-PPADK) enhanced the degradation upon exposure to light. Based on the polymer, nanoparticles were prepared using the solvent displacement method. The fluorescence dye Lumogen® Red was incorporated as a model substance. The nanoparticles were characterized by dynamic light scattering to determine their hydrodynamic diameter and size distribution, and the surface charge was analyzed. Atomic force microscopy was used to visualize the surface morphology. The nanoparticles remained stable under physiological pH conditions while exhibiting accelerated degradation and substance release in acidic environment, a property potentially exploitable for tumor targeting. Further enhanced degradation and correspondingly increased release was achieved by incorporating light-responsive elements in the polymer structure.
The cytotoxicity of these newly designed nanoparticles was evaluated in cell culture using a breast cancer cell line. These results support the potential of o-NB-PPADK nanoparticles as a possible candidate for selective and effective cancer therapy, combining stimuli-responsive degradation mechanisms for improved therapeutic outcomes.}},
author = {{Kramer, Maurice and van der Linde, Matthias and Hönscheid, Lisa and Horky, Corinna and Völlmecke, Katharina and Mulac, Dennis and Herrmann, Fabian and Kuckling, Dirk and Langer, Klaus}},
issn = {{0378-5173}},
journal = {{International Journal of Pharmaceutics}},
keywords = {{Nanoparticles, Drug delivery, Controlled release, Stimuli-responsiveTumor targeting}},
publisher = {{Elsevier BV}},
title = {{{Enlightening release strategies: Accelerated nanoparticle degradation and substance release utilizing light- and pH-responsive polymers}}},
doi = {{10.1016/j.ijpharm.2025.126127}},
volume = {{684}},
year = {{2025}},
}
@article{64885,
abstract = {{The tribological behavior of thermo‐responsive poly(N‐isopropylacrylamide) (PNIPAAm)‐based microgels is investigated for use as water‐dispersible lubricant additives. Two types of microgels are synthesized using a surfactant‐free emulsion polymerization method: MG0, consisting of pure PNIPAAm with a volume phase transition temperature (VPTT) of ≈33 °C, and MG16, consisting of PNIPAAm copolymerized with hydrophobic tert‐butyl acrylamide, exhibiting a lower VPTT of around 23 °C. Swelling and lubrication performance are evaluated at 20 and 40 °C. Both microgels significantly reduce friction and wear compared to water alone. At 20 °C, MG0 remains fully swollen and provides effective wear protection through hydrated microgel lubrication. MG16, being near its VPTT, exhibits partial collapse and slightly higher wear. At 40 °C, MG16 demonstrates improved wear resistance, attributed to enhanced film compaction in the collapsed state. Raman spectroscopy and scanning electron microscopy–energy‐dispersive X‐ray spectroscopy confirm that carbon‐rich tribofilms are formed via tribochemical reactions. MG0 produces more graphitic films, while MG16 generates amorphous carbon structures. These findings highlight the tunability of microgel composition for designing adaptive, water‐based lubricants for temperature‐sensitive applications.}},
author = {{Syed, Junaid and Dyck, Florian and Herberg, Artjom and Kuckling, Dirk and Gosvami, Nitya Nand}},
issn = {{1438-1656}},
journal = {{Advanced Engineering Materials}},
number = {{1}},
publisher = {{Wiley}},
title = {{{Microgel Additives for Aqueous Lubrication: Tailoring Friction and Wear via Composition and Thermal Responsiveness}}},
doi = {{10.1002/adem.202501673}},
volume = {{28}},
year = {{2025}},
}
@article{60566,
author = {{Bocchini, Adriana and Rüsing, Michael and Bollmers, Laura and Lengeling, Sebastian and Mues, Philipp and Padberg, Laura and Gerstmann, Uwe and Silberhorn, Christine and Eigner, Christof and Schmidt, Wolf Gero}},
issn = {{2475-9953}},
journal = {{Physical Review Materials}},
number = {{7}},
publisher = {{American Physical Society (APS)}},
title = {{{Mg dopants in lithium niobate: Defect models and impact on domain inversion}}},
doi = {{10.1103/5wz1-bjyr}},
volume = {{9}},
year = {{2025}},
}
@article{63733,
abstract = {{We study a possibility of measuring the time-resolved second-order autocorrelation function of one of two beams generated in type-II parametric down-conversion by means of temporal magnification of this beam, bringing its correlation time from the picosecond to the nanosecond scale, which can be resolved by modern photodetectors. We show that such a measurement enables one to infer directly the degree of global coherence of that beam, which is linked by a simple relation to the number of modes characterizing the entanglement between the two generated beams. We illustrate the proposed method by an example of photon pairs generated in a periodically poled potassium titanyl phosphate (KTP) crystal with a symmetric group velocity matching for various durations of the pump pulse, resulting in different numbers of modes. Our theoretical model also shows that the magnified double-heralded autocorrelation function of one beam exhibits a local maximum around zero delay time, corresponding to photon bunching at a short time scale.}},
author = {{Horoshko, Dmitri B. and Srivastava, Shivang and Sośnicki, Filip Maksymilian and Mikołajczyk, Michał and Karpiński, Michał and Brecht, Benjamin and Kolobov, Mikhail I.}},
issn = {{2469-9926}},
journal = {{Physical Review A}},
number = {{2}},
publisher = {{American Physical Society (APS)}},
title = {{{Time-resolved second-order autocorrelation function of parametric down-conversion}}},
doi = {{10.1103/7ckm-tm3r}},
volume = {{112}},
year = {{2025}},
}
@inproceedings{65259,
author = {{Böer, Nils Tobias and Güldenpenning, Iris and Weigelt, Matthias}},
booktitle = {{67th Conference of Experimental Psychologists}},
editor = {{Lê-Hoa Võ, Melissa and Fiebach, Christian and Shing, Yee Lee and Sammler, Daniela and Windmann, Sabine and Kaiser, Jochen}},
keywords = {{deception, action preparation, perception, movement planning, sport psychology}},
location = {{Frankfurt am Main}},
pages = {{132}},
title = {{{Differences of producing head fakes with and without a social partner}}},
year = {{2025}},
}
@article{58606,
author = {{Mathew, Albert and Aschwanden, Rebecca and Tripathi, Aditya and Jangid, Piyush and Sain, Basudeb and Zentgraf, Thomas and Kruk, Sergey}},
issn = {{1530-6984}},
journal = {{Nano Letters}},
keywords = {{metasurfaces, nanophotonics, nonreciprocity, optical isolators, silicon photonics}},
publisher = {{American Chemical Society (ACS)}},
title = {{{Nonreciprocal Metasurfaces with Epsilon-Near-Zero Materials}}},
doi = {{10.1021/acs.nanolett.4c06188}},
year = {{2025}},
}
@misc{63855,
abstract = {{Elektronenenergieverlustspektroskopie (engl. EELS) ist eine fortgeschrittene Analysemethode der Transmissionselektronenmikroskopie, die auf atomarer Ebene Einblicke in Materialcharakteristika wie bspw. Eigenschaften des Elektronensystems oder der Materialzusammensetzung erlaubt. Die Genauigkeit jeder EELS-Analyse ist jedoch fundamental durch Rauschen und Unschärfe begrenzt. Diese Thesis beschreibt solche Rauschphänomene im Detail. Vor allem bei strahlempfindlichen Materialien, die kurze Bestrahlzeiten erfordern, aber auch bei Elektron-Materie-Wechselwirkungen mit geringer Auftrittshäufigkeit, ist eine solche Beschreibung notwendig, da das Rauschen solche Messungen dominiert. Zusätzlich spielen Korrelationen des Rauschens eine Rolle, die durch Faltung des verrauschten Signals mit der Punktspreizfunktion des Detektors entstehen und die sowohl theoretisch als auch experimentell beschrieben werden. Methoden zur Messung der wichtigsten Rauschparameter bei typischen Detektorsystemen werden vorgestellt und erlauben es, das Rauschmodel auf jeden beliebigen EELS-Detektor anzupassen. Eine neue Entfaltungsmethode wird vorgeschlagen, die EELS-Messungen schärft und entrauscht. Die Wirksamkeit dieser Methode wird an Simulations- und Experimentaldaten dargelegt. Hierbei wird gezeigt, dass die neue Methode signifikant bessere Ergebnisse liefert, als bisherige und somit eine Analyse von Messdaten auf einem Level ermöglicht, das die Möglichkeiten der Elektronenmikroskopie deutlich erweitert.}},
author = {{Zietlow, Christian}},
publisher = {{Universitätsbibliothek Paderborn}},
title = {{{A novel Lagrangian-based method for the deconvolution of electron energy-loss spectra}}},
doi = {{10.17619/UNIPB/1-2438}},
year = {{2025}},
}
@article{65611,
abstract = {{
Spins confined in optically active quantum dot molecules (QDMs) can be used for the deterministic generation of photonic graph states with tailored entanglement structures. Their usefulness for the generation of such nonclassical states of light is determined by orbital and spin decoherence mechanisms, particularly phonon-mediated processes dominant at energy scales up to a few millielectronvolts. Here, we directly measure the spectral function of orbital phonon relaxation between the energy states of the neutral exciton in a QDM and benchmark our findings against microscopic
k
·
p
theory. Our results reveal pronounced resonances and antiresonances in the phonon-relaxation rates, ranging from tens of
µ
s
−
1
up to tens of
ns
−
1
. Comparison with a kinetic model reveals the voltage (energy) dependent phonon coupling strength and fully explains the interplay between phonon-assisted relaxation and radiative recombination. The resonances and antiresonances enable further tunability of the exciton lifetime which can be leveraged to increase the lifetime of energetically unfavorable charge configurations needed for realizing efficient spin-photon interfaces and multidimensional cluster states.
}},
author = {{Lienhart, Michelle and Gawarecki, Krzysztof and Stöcker, Markus and Bopp, Frederik and Cullip, Charlotte and Akhlaq, Nadeem and Thalacker, Christopher and Schall, Johannes and Rodt, Sven and Ludwig, Arne and Reuter, Dirk and Reitzenstein, Stephan and Müller, Kai and Machnikowski, Paweł and Finley, Jonathan J.}},
issn = {{2469-9950}},
journal = {{Physical Review B}},
number = {{23}},
publisher = {{American Physical Society (APS)}},
title = {{{Resonant and antiresonant exciton-phonon coupling in quantum dot molecules}}},
doi = {{10.1103/xc25-1tph}},
volume = {{112}},
year = {{2025}},
}
@article{63513,
author = {{Grimminger-Seidensticker, Elke and Treder, Alexandra and Niederhaus, Constanze}},
journal = {{Zeitschrift für Sportpädagogische Forschung}},
number = {{2}},
pages = {{189--212}},
publisher = {{Nomos}},
title = {{{Sprachbezogene Kompetenzerwartungen im Sportunterricht – Eine systematische Lehrplananalyse}}},
doi = {{https://doi.org/10.5771/2196-5218-2025-2-189}},
volume = {{13}},
year = {{2025}},
}
@article{65669,
abstract = {{Local droplet etching and subsequent refilling enables the fabrication of highly symmetric quantum dots with low fine structure splitting, suitable for generating polarization entangled photons. While well established in GaAs/AlxGa1−xAs, this approach does not yield emission in the telecom bands required for low loss fiber-based quantum communication. To achieve emission at 1.55 μm, local droplet etching must be adapted to alternative material platforms such as InP. Here, we systematically investigate how the etching material deposition rate and etching time influence nanohole morphology in In0.52Al0.48As layers lattice-matched to InP. In the first experiment, InAl was deposited at fluxes of 0.2–4.0 Å s−1 at Tetch = 350 °C and 460 °C. Lower fluxes produced nanoholes with lower density and larger ring diameters, indicating fewer and larger initial droplets, consistent with scaling theory. The average nanohole diameter decreased monotonically with increasing flux, whereas the average depth showed no clear dependence on flux. In the second experiment, etching times of 30–600 s were tested for InAl, In, and Al droplets. Average nanohole diameters remained constant for Al across all etching times, but decreased for In and InAl with increasing etching time, suggesting sidewall redeposition during etching. For all droplet types, depths peaked at intermediate times and decreased for prolonged etching, consistent with material diffusion into the nanohole after droplet consumption.}},
author = {{Deutsch, Dennis and Reuter, Dirk}},
issn = {{2073-4352}},
journal = {{Crystals}},
number = {{11}},
publisher = {{MDPI AG}},
title = {{{Influence of the Etching Material Deposition Rate and Annealing Time on Nanohole Morphology Etched into InP/In0.52Al0.48As Layers via Local Droplet Epitaxy}}},
doi = {{10.3390/cryst15110913}},
volume = {{15}},
year = {{2025}},
}
@inproceedings{60133,
author = {{Böer, Nils Tobias and Güldenpenning, Iris and Weigelt, Matthias}},
booktitle = {{Abstracts of the 57th Annual Conference of the German Association of Sport Psychology}},
editor = {{Kullik, Lisa and Birnkraut, Tim and Kellmann, Michael}},
location = {{Bochum}},
pages = {{105}},
title = {{{Differences of producing head fakes with and without a social partner}}},
year = {{2025}},
}
@techreport{61135,
author = {{Fechner, Sabine and Schlegel-Matthies, Kirsten and Kiepe, Karina}},
publisher = {{AG Bildung für nachhaltige Entwicklung PLAZ}},
title = {{{Positionspapier: Bildung für nachhaltige Entwicklung (BNE) in der Lehrkräftebildung an der UPB}}},
year = {{2025}},
}
@inbook{45827,
author = {{Cao, Chuntian and Steinrück, Hans-Georg}},
booktitle = {{Reference Module in Chemistry, Molecular Sciences and Chemical Engineering}},
isbn = {{9780124095472}},
pages = {{391--416}},
publisher = {{Elsevier}},
title = {{{Molecular-scale synchrotron X-ray investigations of solid-liquid interfaces in lithium-ion batteries}}},
doi = {{10.1016/b978-0-323-85669-0.00105-7}},
year = {{2024}},
}
@article{50740,
author = {{Weber, Katharina S. and Schlesinger, Sabrina and Lang, Alexander and Straßburger, Klaus and Maalmi, Haifa and Zhu, Anna and Zaharia, Oana-Patricia and Strom, Alexander and Bönhof, Gidon J. and Goletzke, Janina and Trenkamp, Sandra and Wagner, Robert and Buyken, Anette and Lieb, Wolfgang and Roden, Michael and Herder, Christian and Roden, M. and Al-Hasani, H. and Belgardt, B. and Lammert, E. and Bönhof, G. and Geerling, G. and Herder, C. and Icks, A. and Jandeleit-Dahm, K. and Kotzka, J. and Kuß, O. and Rathmann, W. and Schlesinger, S. and Schrauwen-Hinderling, V. and Szendroedi, J. and Trenkamp, S. and Wagner, R.}},
issn = {{0939-4753}},
journal = {{Nutrition, Metabolism and Cardiovascular Diseases}},
keywords = {{Cardiology and Cardiovascular Medicine, Nutrition and Dietetics, Endocrinology, Diabetes and Metabolism, Medicine (miscellaneous)}},
publisher = {{Elsevier BV}},
title = {{{Association of dietary patterns with diabetes-related comorbidities varies among diabetes endotypes}}},
doi = {{10.1016/j.numecd.2023.12.026}},
year = {{2024}},
}
@article{50798,
abstract = {{Abstract
Background
An infection with SARS-CoV-2 can lead to a variety of symptoms and complications, which can impair athletic activity.
Objective
We aimed to assess the clinical symptom patterns, diagnostic findings, and the extent of impairment in sport practice in a large cohort of athletes infected with SARS-CoV-2, both initially after infection and at follow-up. Additionally, we investigated whether baseline factors that may contribute to reduced exercise tolerance at follow-up can be identified.
Methods
In this prospective, observational, multicenter study, we recruited German COVID elite-athletes (cEAs, n = 444) and COVID non-elite athletes (cNEAs, n = 481) who tested positive for SARS-CoV-2 by PCR (polymerase chain reaction test). Athletes from the federal squad with no evidence of SARS-CoV-2 infection served as healthy controls (EAcon, n = 501). Questionnaires were used to assess load and duration of infectious symptoms, other complaints, exercise tolerance, and duration of training interruption at baseline and at follow-up 6 months after baseline. Diagnostic tests conducted at baseline included resting and exercise electrocardiogram (ECG), echocardiography, spirometry, and blood analyses.
Results
Most acute and infection-related symptoms and other complaints were more prevalent in cNEA than in cEAs. Compared to cEAs, EAcon had a low symptom load. In cNEAs, female athletes had a higher prevalence of complaints such as palpitations, dizziness, chest pain, myalgia, sleeping disturbances, mood swings, and concentration problems compared to male athletes (p < 0.05). Until follow-up, leading symptoms were drop in performance, concentration problems, and dyspnea on exertion. Female athletes had significantly higher prevalence for symptoms until follow-up compared to male. Pathological findings in ECG, echocardiography, and spirometry, attributed to SARS-CoV-2 infection, were rare in infected athletes. Most athletes reported a training interruption between 2 and 4 weeks (cNEAs: 52.9%, cEAs: 52.4%), while more cNEAs (27.1%) compared to cEAs (5.1%) had a training interruption lasting more than 4 weeks (p < 0.001). At follow-up, 13.8% of cNEAs and 9.9% of cEAs (p = 0.24) reported their current exercise tolerance to be under 70% compared to pre-infection state. A persistent loss of exercise tolerance at follow-up was associated with persistent complaints at baseline, female sex, a longer break in training, and age > 38 years. Periodical dichotomization of the data set showed a higher prevalence of infectious symptoms such as cough, sore throat, and coryza in the second phase of the pandemic, while a number of neuropsychiatric symptoms as well as dyspnea on exertion were less frequent in this period.
Conclusions
Compared to recreational athletes, elite athletes seem to be at lower risk of being or remaining symptomatic after SARS-CoV-2 infection. It remains to be determined whether persistent complaints after SARS-CoV-2 infection without evidence of accompanying organ damage may have a negative impact on further health and career in athletes. Identifying risk factors for an extended recovery period such as female sex and ongoing neuropsychological symptoms could help to identify athletes, who may require a more cautious approach to rebuilding their training regimen.
Trial Registration Number
DRKS00023717; 06.15.2021—retrospectively registered.
}},
author = {{Widmann, Manuel and Gaidai, Roman and Schubert, Isabel and Grummt, Maximilian and Bensen, Lieselotte and Kerling, Arno and Quermann, Anne and Zacher, Jonas and Vollrath, Shirin and Bizjak, Daniel Alexander and Beckendorf, Claudia and Egger, Florian and Hasler, Erik and Mellwig, Klaus-Peter and Fütterer, Cornelia and Wimbauer, Fritz and Vogel, Azin and Schoenfeld, Julia and Wüstenfeld, Jan C. and Kastner, Tom and Barsch, Friedrich and Friedmann-Bette, Birgit and Bloch, Wilhelm and Meyer, Tim and Mayer, Frank and Wolfarth, Bernd and Roecker, Kai and Reinsberger, Claus and Haller, Bernhard and Niess, Andreas M. and Birnbaum, Mike Peter and Burgstahler, Christof and Cassel, Michael and Deibert, Peter and Esefeld, Katrin and Erz, Gunnar and Greiss, Franziska and Halle, Martin and Hesse, Judith and Keller, Karsten and Kopp, Christine and Matits, Lynn and Predel, Hans Georg and Rüdrich, Peter and Schneider, Gerald and Stapmanns, Philipp and Steinacker, Jürgen Michael and Szekessy, Sarah and Venhorst, Andreas and Zapf, Stephanie and Zickwolf, Christian}},
issn = {{0112-1642}},
journal = {{Sports Medicine}},
keywords = {{Physical Therapy, Sports Therapy and Rehabilitation, Orthopedics and Sports Medicine}},
publisher = {{Springer Science and Business Media LLC}},
title = {{{COVID-19 in Female and Male Athletes: Symptoms, Clinical Findings, Outcome, and Prolonged Exercise Intolerance—A Prospective, Observational, Multicenter Cohort Study (CoSmo-S)}}},
doi = {{10.1007/s40279-023-01976-0}},
year = {{2024}},
}
@article{50829,
author = {{Heinisch, Nils and Köcher, Nikolas and Bauch, David and Schumacher, Stefan}},
issn = {{2643-1564}},
journal = {{Physical Review Research}},
number = {{1}},
publisher = {{American Physical Society (APS)}},
title = {{{Swing-up dynamics in quantum emitter cavity systems: Near ideal single photons and entangled photon pairs}}},
doi = {{10.1103/PhysRevResearch.6.L012017}},
volume = {{6}},
year = {{2024}},
}
@article{51105,
author = {{Wingenbach, Jan and Schumacher, Stefan and Ma, Xuekai}},
journal = {{Physical Review Research, in press}},
title = {{{Manipulating spectral topology and exceptional points by nonlinearity in non-Hermitian polariton systems}}},
year = {{2024}},
}
@article{51121,
abstract = {{DNA origami nanostructures are a powerful tool in biomedicine and can be used to combat drug‐resistant bacterial infections. However, the effect of unmodified DNA origami nanostructures on bacteria is yet to be elucidated. With the aim to obtain a better understanding of this phenomenon, the effect of three DNA origami shapes, i.e., DNA origami triangles, six‐helix bundles (6HBs), and 24‐helix bundles (24HBs), on the growth of Gram‐negative Escherichia coli and Gram‐positive Bacillus subtilis is investigated. These results reveal that while triangles and 24HBs can be used as a source of nutrients by E. coli and thereby promote population growth, their effect is much smaller than that of genomic single‐ and double‐stranded DNA. However, no effect on E. coli population growth is observed for the 6HBs. On the other hand, B. subtilis does not show any significant changes in population growth when cultured with the different DNA origami shapes or genomic DNA. The detailed effect of DNA origami nanostructures on bacterial growth thus depends on the competence signals and uptake mechanism of each bacterial species, as well as the DNA origami shape. This should be considered in the development of antimicrobial DNA origami nanostructures.}},
author = {{Garcia-Diosa, Jaime Andres and Grundmeier, Guido and Keller, Adrian}},
issn = {{1439-4227}},
journal = {{ChemBioChem}},
keywords = {{Organic Chemistry, Molecular Biology, Molecular Medicine, Biochemistry}},
publisher = {{Wiley}},
title = {{{Effect of DNA Origami Nanostructures on Bacterial Growth}}},
doi = {{10.1002/cbic.202400091}},
year = {{2024}},
}
@article{51104,
author = {{Liang, Qian and Ma, Xuekai and Gu, Chunling and Ren, Jiahuan and An, Cunbin and Fu, Hongbing and Schumacher, Stefan and Liao, Qing}},
journal = {{Journal of the American Chemical Society (JACS)}},
title = {{{Photochemical Reaction Enabling the Engineering of Photonic Spin−Orbit Coupling in Organic-Crystal Optical Microcavities}}},
doi = {{10.1021/jacs.3c11373}},
year = {{2024}},
}