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Raman scattering excitation in monolayers of semiconducting transition metal dichalcogenides
No full textRaman scattering excitation (RSE) is an experimental technique in which the spectrum is made up by sweeping the excitation energy when the detection energy is fixed. We study the low-temperature (T = 5 K) RSE spectra measured on four high quality monolayers (ML) of semiconducting transition metal dichalcogenides (S-TMDs), i.e. MoS2, MoSe2, WS2, and WSe2, encapsulated in hexagonal BN. The outgoing resonant conditions of Raman scattering reveal an extraordinary intensity enhancement of the phonon modes, which results in extremely rich RSE spectra. The obtained spectra are composed not only of Raman-active peaks, i.e. in-plane E and out-of-plane A, but the appearance of 1st, 2nd, and higher-order phonon modes is recognized. The intensity profiles of the A modes in the investigated MLs resemble the emissions due to neutral excitons measured in the corresponding PL spectra for the outgoing type of resonant Raman scattering conditions. Furthermore, for the WSe2 ML, the A mode was observed when the incoming light was in resonance with the neutral exciton line. The strength of the exciton-phonon coupling (EPC) in S-TMD MLs strongly depends on the type of their ground excitonic state, i.e. bright or dark, resulting in different shapes of the RSE spectra. Our results demonstrate that RSE spectroscopy is a powerful technique for studying EPC in S-TMD MLs.This dataset contains spectra shown in publication npj 2D Materials and Applications 8, 2 (2024) in Fig. 2 and in Supplementary Figure 1b.Fig. 2 contains spectra of Raman scattering excitation for exfoliated monolayers of semiconducting transition metal dichalcogenides: MoS2, MoSe2, WS2, WSe2andSupplementary Figure 1b contains spectra of Photoluminescence and Photoluminescence excitation for MBE grown MoSe2.</p
Obrazowanie oparte o gazowe powielacze elektronowe w warunkach intensywnego promieniowania z plazmy tokamakowej - część 2.
No full textPrzedmiotem niniejszej pracy jest przedstawienie koncepcji trójwymiarowego systemu tomografii rentgenowskiej opartego na kwadratowej macierzy detektorów GEM oraz uzyskanych wstępnych wyników przeprowadzonych symulacji. Opracowana diagnostyka obejmuje 33 462 piksele detekcyjne, skorelowane z liniami widzenia. Analiza została przeprowadzona na podstawie symulacji numerycznych z wykorzystaniem kodów komputerowych GEM_MP.exe oraz Tomography.exe (oba opracowane w IPPLM), umożliwiających uwzględnienie promieniowania rentgenowskiego typu free-free, free-bound oraz bound-bound docierającego do każdego z pikseli diagnostyki GEM (kod GEM_MP.exe) oraz testowanie algorytmów rekonstrukcji tomograficznej emisyjności plazmy (kod Tomography.exe).Podczas obliczeń uwzględniono rzeczywiste profile gęstości elektronowej i temperatury elektronowej, a także rzeczywistą geometrię układu pomiarowego. Dodatkowo zbadano wpływ czynników, takich jak zastosowane filtry w detektorze oraz efektywność użytego medium aktywnego, na jakość rekonstrukcji tomograficznej. W podsumowaniu dokonano oceny zaproponowanej metody rekonstrukcji tomograficznej.</p
Microscopy techniques in the optimization of Nitinol implants: surface modification for improved biocompatibility and durability in the treatment of atrial septal defect
No full textThis dataset contains the results of surface characterization of Nitinol alloy samples and Nitinol samples modified with an SiO₂ coating deposited using the Atomic Layer Deposition (ALD) method. The work is dedicated to the development of surface engineering solutions for cardiovascular implants, particularly occluder systems for atrial septal defect (ASD) closure. The aim of the study was to correlate surface morphology, and potential delamination regions to assess the stability and biocompatibility of coated Nitinol substrates.Sample Preparation:Base material: NiTi (Nitinol, shape memory alloy)Surface modification: ALD coating of SiO₂Reference samples: Bare NiTi (without coating)Experimental Techniques:Scanning Electron Microscopy (SEM)High-resolution imaging of surface morphology. Reveals fine structures, coating homogeneity, and potential cracks in SiO₂ layers.Scanning Acoustic Microscopy (SAM)Stress maps visualized in grayscale and color modes. Detection of high-stress regions indicating coating delamination.Data Structure and Content:The dataset is organized into folders corresponding to the applied analysis techniques and sample types:Contains microscopic images of Nitinol and Nitinol+ALD surfaces.Data catalog SEM:High-resolution SEM micrographs of surfaces:NiTi surface - bare NiTi;NiTi+ALD - NiTi coated with SiO₂ (ALD).File format: TIFF/PNG.Data catalog SAM:Acoustic microscopy images:grey view - grayscale stress maps;color view - color-enhanced delamination mode maps.File format: JPG.</p
Hybrid acousto-optical swing-up state control in a quantum dot
No full textComputed data for the article "Hybrid acousto-optical swing-up state control in a quantum dot" to be published in npj Quantum Information. The dataset consists of tabular text files. Each file contains data for a curve (x, y columns) or color map (x, y, value columns) presented in a manuscript figure panel with both the curve/map number and panel defined by the file name. All numbers are given in units as in the corresponding manuscript figures. Detailed information is given in the README.md file.</p
Development of electron detectors for the BRAND experiment
No full textThe advanced version of BRAND-II experiment will utilize a long plastic scintillator bar (100 × 10 × 1) cm3 for the measurement of energy deposited by the electrons originating from neutron decay (direct and Mott-scattered electrons). The commercially available EJ200 scintillator is particularly suitable for this application due to its significant light attenuation length of 380 cm.Two Hamamatsu PMTs (R1828-01) are coupled to the scintillator at both ends via light guide. To enhance light collection, the light guide adapter and three faces of the scintillator are wrapped with a 98% reflective film (3M ESR), while the front face is wrapped with aluminized Mylar. The scintillator was scanned with a 241Am source (59 keV gamma, dia 2 mm) and 207Bi source (two conversion electron line groups around 480 and 1000 keV, dia 0.5 mm). These sources were directly placed on the scintillator front face.Figures show the measured response using 241Am (59 keV gamma) and 207Bi (1 MeV conversion electron), demonstrating an almost uniform distribution with a maximum deviation of approximately 2% along the scintillator.The percentage deviation in the geometrical mean (GM) with respect to the average value is shown as well.</p
Research on early fault detection of current sensors operating in a closed-loop control structure using transfer learning
No full textThis research is focussed on transfer learning used to develop universal algorithms to detect various faults of current sensors in the AC drive system. It presents the possibility of using the idea of deep convolutional network transfer learning in fault diagnosis of current sensors of induction motors operating in a closed control structure. The versatility of the approach includes the possibility, as demonstrated in the article, of expanding the range of current sensor faults to be analyzed. In the study, a drive system simulation model was used as a source of diagnostic information. Particularly notable is the very high level of precision of the developed system (more than 98.3%) at the same time as the possibility of extending the types and levels of considered faults. Furthermore, the response time to an emerging fault was less than 0.0125 seconds.</p
Dataset for 'Order-disorder transition in multidirectional crowds'
No full textExperimental data from K.A. Bacik, G. Sobota, B.S. Bacik, and T. Rogers, "Order-disorder transition in multidirectional crowds", PNAS, 2025 (Bacik et al. 2025).Two experimental sessions with human participants (83 and 70 subjects, respectively) were conducted to validate a mathematical model of multidirectional crowd dynamics. The research protocol was approved by the Bioethics Committee for Scientific Research at the Academy of Physical Education in Katowice (no. 1/2022/6/23).The participants gathered in a gymnasium arranged into an experimental arena, and they were asked to cross according to personalized itineraries. The motion of the participants was recorded with an overhead camera, and a Apriltag-based algorithm was used to extract their position in time. The details of the experimental protocol can be found in (Bacik et al., 2025) and the accompanying supplementary materials.The files in the repository contain post-processed data that can be used to extract pedestrian trajectories, as well as 5 representative videos.</p
Elemental analyses with ICPOES, CHNS and FTIR
No full textAnalytical data collected during the Miniatura 7 project in 2023-2025. The data obtained from the ICPOES, FTIR and CHNS analysers concern both the substrates used for cultivation and cultivation as well as the fruiting bodies of the studied fungal species.Data contains a ReadMe.txt file.</p
Structural, compositional, and bioactive assessment of Ti3C2Tx MXene-modified alginate, chitosan, elastin, keratin, and collagen hydrogels
No full textThis database contains raw data from a comprehensive study investigating the potential of Ti3C2Tx MXene in enhancing the bioactive properties of organic-based hydrogels composed of alginate, chitosan, elastin, keratin, and collagen. The dataset includes detailed characterization of the parental MAX and synthesized MXene, covering morphology, structure, elemental and phase composition, optical properties, and chemical composition. Additionally, data on the incorporation of MXene into hydrogel matrices and its impact on structural modifications are provided. The bioactive studies in this dataset focus on biocompatibility, ROS scavenging activity, and the biostatic and biocidal effects against E. coli and S. aureus, highlighting the role of MXene in modulating these properties.1. Characterization of Ti3C2Tx MXene.zip: It includes extensive characterization data for Ti3C2Tx MXene, a two-dimensional transition metal carbide known for its unique electrical, mechanical, and chemical properties. Various analytical techniques have been used to examine the material in both dispersion and powder forms, comparing with parental MAX phase. Dynamic light scattering (DLS) provides insights into the particle size distribution of MXene nanosheets in solution. Energy dispersive spectroscopy (EDS) confirms the elemental composition, highlighting the presence of titanium, carbon, and surface termination groups. Fourier transform infrared spectroscopy (FTIR) identifies functional groups and surface chemistry modifications. Zeta potential measurements assess the colloidal stability and surface charge of Ti3C2Tx MXene in aqueous dispersions. Raman spectroscopy investigates the vibrational modes and layered structure. Scanning electron microscopy (SEM) provides high-resolution images of MXene morphology and nanosheet arrangement. Dynamic particle analysis (DPA) examines the motion and size distribution of dispersed MXene nanosheets. UV-Visible spectroscopy (UV-Vis) measures the optical absorption properties, helping evaluate dispersion quality and stability. X-ray diffraction (XRD) confirms the crystallographic structure and phase purity of Ti3C2Tx MXene. Tyndall effect analysis demonstrates the light-scattering behavior of the colloidal dispersion, further validating its stability. This dataset is useful for researchers studying nanomaterials, MXenes, colloidal chemistry, and material science applications, offering a comprehensive set of experimental data for further investigation.2. SEM images of hydrogels.zip: This dataset includes scanning electron microscope (SEM) images of both pristine hydrogel matrices and hydrogels modified with Ti3C2Tx MXene. The SEM images offer detailed high-resolution visual insights into the surface morphology, structural features, and any changes introduced to the hydrogels by the MXene modification. Researchers can use this data to analyze the impact of Ti3C2Tx MXene on the hydrogel’s microstructure and evaluate its potential applications in areas such as material science, biomedical engineering, and nanocomposite development.3. Studies_on_porosity_of_hydrogels_modified_with Ti3C2Tx_MXene.zip: This archive contains detailed porosity analysis data for hydrogels modified with Ti3C2Tx MXene, derived from Scanning Electron Microscopy (SEM) imaging. SEM images were subjected to quantitative image analysis using ImageJ software (NIH, Bethesda, MD, USA) to assess microstructural parameters. Key evaluated metrics include average pore size, pore diameter, sphericity factor, maximum and minimum Feret diameters, and Feret diameter ratio. These porosity assessments provide critical insight into how Ti₃C₂Tₓ MXene incorporation influences hydrogel morphology, potentially affecting their performance in applications such as drug delivery, tissue engineering, and advanced biomaterials development.4. Characterization of hydrogels modified with Ti3C2Tx MXene.zip: This archive contains comprehensive characterization data for hydrogel matrices modified with Ti3C2Tx MXene, including results from Fourier Transform Infrared Spectroscopy (FTIR), X-ray Fluorescence Spectroscopy (XRF), and microscopic analyses. FTIR spectroscopy identifies changes in functional groups and chemical bonding interactions between MXene and the organic hydrogel components. XRF spectroscopy: Provides elemental composition data, confirming the distribution and integration of Ti3C2Tx MXene within the hydrogel structure. Microscopic Observations (optical and SEM) reveals morphological alterations, including variations in porosity, surface roughness, and MXene dispersion throughout the hydrogel network. These analyses offer valuable insights into how MXene modification influences the structural, chemical, and bioactive properties of hydrogels, paving the way for their potential applications in biomedical and material science fields.5. Rheological_studies_on_hydrogels_modified_with_Ti3C2Tx_MXene.zip: This archive contains rheological characterization data for hydrogel matrices modified with Ti3C2Tx MXene, obtained through oscillatory rheological measurements. Experiments were performed using rheometer with parallel plate geometry. Key viscoelastic parameters recorded include storage modulus (G') and loss modulus (G''), providing insights into the elastic and viscous behavior of the hydrogels. Complex viscosity (η*) was also calculated to further evaluate the material's flow characteristics. These rheological profiles help elucidate the influence of Ti3C2Tx MXene incorporation on the mechanical stability and dynamic response of hydrogel systems, contributing to their optimization for biomedical and soft material applications.6. Evaluation of bioactivity with OD610.zip: This dataset contains the results of antibacterial property studies conducted on hydrogel matrices modified with Ti3C2Tx MXene. The bioactivity of the hydrogels was evaluated using optical density (OD) measurements at 610 nm. These results provide insights into the antibacterial effectiveness of the modified hydrogels, useful for research in fields such as biomedical applications, material science, and the development of antimicrobial nanocomposites.7. Evaluation of bioactivity with CFU.zip: This dataset contains the results of antibacterial property studies carried out on hydrogel matrices modified with Ti3C2Tx MXene. The antibacterial properties were evaluated through agar plate culture, with the results presented as colony-forming units (CFU). These data provide valuable information on the antimicrobial effectiveness of the modified hydrogels, which can be used in research related to biomedical applications, antimicrobial material development, and nanocomposite technologies.8. Evaluation of bioactivity with ROS.zip: This dataset presents results from studies evaluating the reactive oxygen species (ROS) scavenging properties of hydrogel matrices modified with Ti3C2Tx MXene. The bioactivity was assessed using fluorescent probes, and the results are presented as fluorescence intensity, which corresponds to the scavenging activity of the materials in terms of ROS reduction. ROS scavenging is an important property, especially in biomedical applications, as excessive ROS levels are linked to oxidative stress and various diseases. The data demonstrate the potential of Ti3C2Tx MXene-modified hydrogels to neutralize harmful ROS, making them valuable for applications like wound healing, tissue engineering, and the development of antioxidant materials.</p
Mechanistic insight into the kinetic fragmentation of norpinonic acid in the gas phase: an experimental and density functional theory (DFT) study
No full textNorpinonic acid, a major product of β-pinene oxidation in the atmosphere, was studied to reveal its gas-phase fragmentation. Using tandem mass spectrometry (ER-CID) and quantum chemical calculations, two main pathways were found: decarboxylation (m/z 125) and loss of C4H6O (m/z 99). Further fragments (m/z 69, 57, 55) and proton transfer studies confirmed the ion structures, thereby enhancing the understanding of its role in secondary organic aerosol formation. The repository contains the original quantum chemical computational files from Gaussian.Please consult the Readme.txt file for additional information. </p
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