物理最新文献

{"title":"Unravelling the mysteries of the fifteenth century ‘Saint Vincent Panels’ by combined in situ and micro-Raman spectroscopy","authors":"Eva Vermeersch,&nbsp;Anastasia Rousaki,&nbsp;Sylvia Lycke,&nbsp;Sara Valadas,&nbsp;Virgínia Glória Nascimento,&nbsp;Rita Oliveira,&nbsp;José Mendes,&nbsp;Susana Campos,&nbsp;Joaquim Caetano,&nbsp;António Candeias,&nbsp;Peter Vandenabeele","doi":"10.1140/epjp/s13360-025-06104-7","DOIUrl":"10.1140/epjp/s13360-025-06104-7","url":null,"abstract":"<div><p>‘The Saint Vincent panels’ are produced by the painter Nuno Gonçalves, and it is a fifteenth century polyptych consisting of six panels. The uniqueness of the work, together with the documentation scarcity about Nuno Gonçalves, highlights the importance of the research of characterizing the colour palette. Raman spectroscopy, both in situ and laboratory instrumentation, was used for this. The mobile Raman spectroscopy campaign is part of the multidisciplinary research project ‘Study, Conservation and Restoration of Saint Vincent Panels’. A mobile EZRaman-I dual Raman analyser (785 and 532 nm) was used during the opening hours of the museum to investigate the panels and their pigments. The polyptych was heavily varnished and as such, the 785 nm laser was preferred for the characterization. It proved to be efficient in characterizing most of the pigments: vermilion, lead tin yellow type I, lazurite, carbon black, gypsum, lead white and calcite were identified. Intervention areas were characterized by the presence of titanium dioxide. Only for a few colours (blue, pink/purple and green), identification with the 785 nm laser was ambiguous and additional characterization with the 532 nm laser was hampered by the strong fluorescing varnish. As a result, micro-samples of these regions were collected for further analysis with benchtop micro-Raman instrumentation. Next to the confirmation of the in situ results, azurite and copper resinate were identified. As such, the combination of both approaches was successful in unravelling the colour palette of the Saint Vincent panels.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of aluminium and tungsten impurities on reduced graphene oxide/zinc oxide nanocomposites humidity sensing performance","authors":"A. Shamsul Rahimi A. Subki,&nbsp;Faiz Arith,&nbsp;Dayana Kamaruzaman,&nbsp;Norfarariyanti Parimon,&nbsp;Musa Mohamed Zahidi,&nbsp;Suriani Abu Bakar,&nbsp;Mohd Khairul Ahmad,&nbsp;Muhammad Danang Birowosuto,&nbsp;Nagamalai Vasimalai,&nbsp;Mohamad Hafiz Mamat","doi":"10.1007/s00339-025-08349-6","DOIUrl":"10.1007/s00339-025-08349-6","url":null,"abstract":"<div><p>In this work, impurities-induced ZnO nanostructured powders were prepared via a benign, ultrasonicated low-temperature solution immersion method. The humidity sensor was constructed utilizing the nanocomposite consisting of the synthesized impurities-induced ZnO nanostructured powders with reduced graphene oxide by a facile brush printing procedure. This work intended to evaluate the effect of impurities on the formation of nanocomposite heterostructures for optimal humidity sensing properties and investigate their correlation with morphological, chemical, optical, and electrical characteristics. The characterization for morphological, chemical, and optical changes induced by Al and W impurities in the nanocomposites was conducted through XRD, HRTEM, EDS, Raman spectroscopy, XPS and DRS. The fabricated humidity sensors have been evaluated at room temperature to assess their sensor resistance ratio, sensitivity, sensing response, and other related humidity sensing performance at relative humidity levels ranging from 40 to 90%. The humidity sensor utilizing rGO/W:ZnO nanocomposite exhibited better resistance changes compared to rGO/ZnO. Corresponding to the nanocomposite formation between W:ZnO and rGO, the sensor resistance ratio and sensitivity improved significantly to 249.61 ± 0.97 and 12.67 ± 0.06 MΩ/%RH, respectively with the sensor establishing a maximum sensing response of 99.61 ± 0.02. Furthermore, the rGO/W:ZnO heterostructure-based humidity sensor demonstrated improved and lowest hysteresis error, long-term stability over 30 days, and reliable repeatability compared to other tested samples within the tested relative humidity range. The utilization of W:ZnO with rGO as sensing material provides a novel direction for designing a cost-effective and highly sensitive humidity monitoring sensor.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143530019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Facile fabrication of NbTe2 doped with Ag via hydrothermal route for approaching the high performance toward supercapacitor applications","authors":"Kashan Ali Gillani,&nbsp;Ahmed M. Fallatah,&nbsp;Mohamed M. Ibrahim,&nbsp;Abdulraheem S. A. Almalki,&nbsp;Hafiz Muhammad Tahir Farid,&nbsp;Muhammad Aslam,&nbsp;Zeinhom M. El-Bahy","doi":"10.1140/epjp/s13360-025-06058-w","DOIUrl":"10.1140/epjp/s13360-025-06058-w","url":null,"abstract":"<div><p>Energy crisis and greenhouse effects are reaching alarming levels, the development of active materials that are both environment friendly and economically viable is essential for energy storing technologies. Currently, supercapacitors (SC_s) are a best type of energy storage devices that attained significant attention from scientists. The fabrication of composites using transition metal with chalcogenides possessed high specific capacitance, structural integrity, maximum energy efficiency, low cost, higher power density and energy density. The hydrothermal route was utilized to developed niobium telluride (NbTe₂) and silver-doped niobium telluride (Ag-NbTe₂). The Ag-NbTe₂ nanoflakes were examined through scanning electron microscopy (SEM) to identify structural morphology of NbTe₂ nanoparticles incorporated inside transition metal (Ag) which demonstrated the nanoflakes morphology. The increased surface area of Ag-NbTe₂ was confirmed through the BET as computed value of pristine NbTe₂ was 21 cm² g⁻¹ and with silver doped (Ag-NbTe₂) was 51 cm² g⁻¹. The examination on energy storing devices by using 3 M KOH electrolyte to conduct electrochemical impedance spectroscopy (EIS), galvanic charge–discharge and cyclic voltammetry experiments. Moreover, the fabricated material Ag-NbTe₂ nanoflakes displayed exceptional charge–discharge cycling characteristics, with specific capacitance (<i>C</i>_s) 1774 F g⁻¹ at current density (<i>j</i>_d) 1 A g⁻¹. By analyzing the EIS graph successfully identified the solution resistance (<i>R</i>_s) as 2.34 Ω with charge transfer resistance (<i>R</i>_ct) as 0.77 Ω. Further, results of our research provide a cost-efficient, highly effective and easily expandable approach for producing nanocomposites by hydrothermal techniques. This fabricated material exhibited enhanced electrochemical performance, making them highly suitable for utilization in supercapacitors (SC_s) and other energy storage devices.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"X-ray compositional microanalysis and X-ray diffraction of Haltern 70 amphorae sherds","authors":"Daniel Pinheiro,&nbsp;Mauro Guerra,&nbsp;António J. M. Silva,&nbsp;Christian Stieghorst,&nbsp;Benilde F. O. Costa","doi":"10.1007/s00339-025-08313-4","DOIUrl":"10.1007/s00339-025-08313-4","url":null,"abstract":"<div><p>About 100 sherds from Haltern 70 amphorae recovered from Castro do Vieito (NW Portugal) and from kiln sites located at Guadalquivir valley, Rio Tinto valley, bay of Cadix and Algarve coast, were analyzed by X-ray fluorescence spectroscopy (XRF) and X-ray diffraction (XRD). The study aimed mainly to verify the provenance of Castro do Vieito (CV) Haltern 70 amphorae. Principal components analysis (PCA) and cluster analysis (CA) were performed. A CV sherd with a potter’s stamp “LH…” was studied among other CV sherds and it was found that they have the same origin, and probably a unique provenance. The most considered area of Haltern 70 type, Guadalquivir valley, is not likely to be the origin of CV Haltern 70 amphorae. Moreover, it is quite possible that these amphorae were produced in a region with Nb rich soils.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00339-025-08313-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Calibration of size-dependent vibrations of aluminum and silver nanobeams by means of hybrid atomistic-continuum simulations using molecular dynamics in conjunction with Bees algorithm","authors":"Abbas Moradi,&nbsp;Hamid M. Sedighi,&nbsp;Mohammad Shishesaz,&nbsp;Afshin Ghanbarzadeh,&nbsp;Hamed Ameri","doi":"10.1140/epjp/s13360-025-06116-3","DOIUrl":"10.1140/epjp/s13360-025-06116-3","url":null,"abstract":"<div><p>With the assistance of molecular dynamics simulations and non-local theories of continuum mechanics, we have captured the size-dependent effects of nanostructures. Continuum models are commonly utilized to study structures' mechanical properties at macro-scales. However, these models are incapable of being employed to determine the mechanical characterization of nanomaterials. In contrast, atomistic simulations, such as molecular dynamics models, are widely accepted for studying the behavior of materials in nano-scaled systems. However, these atomic simulation techniques suffer from high computational costs. In this study, we propose that hybrid atomistic-continuum models are suitable for studying these systems' mechanical and vibrational properties. Hence, free vibrations of FCC metals nanobeams, aluminum, and silver are investigated through non-local elasticity models (Eringen differential and stress-driven models), and strain gradient models are formulated for Euler–Bernoulli and Timoshenko nanobeam. For the first time, atomistic simulation results are utilized in conjunction with the Bees algorithm optimization technique to calibrate the size parameter values for the non-classical continuum models. In this manner, the effects of size parameters on the vibration behavior of metallic nanobeams are examined. Our simulations revealed that aluminum metallic nanobeams exhibit softening and stiffening behaviors, while silver nanobeams show only softening behavior, which is one of the most significant findings of our research. Moreover, we have demonstrated that calibrated continuum models are capable of accurately predicting the mechanical vibrational behavior of nanobeams with only minimal errors.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production and study of antideuterium with the GBAR beamline","authors":"Philipp Blumer,&nbsp;Ben Ohayon,&nbsp;Paolo Crivelli","doi":"10.1140/epjd/s10053-025-00963-6","DOIUrl":"10.1140/epjd/s10053-025-00963-6","url":null,"abstract":"<p>The potential of circulating antideuterons (<span>(mathrm {overline{d}})</span>) in the AD/ELENA facility at CERN is under active investigation. Approximately 100 <span>(mathrm {overline{d}})</span> per bunch could be delivered as a <span>({100,textrm{keV}})</span> beam based on measured cross-sections. These <span>(mathrm {overline{d}})</span> could be further decelerated to <span>({12,textrm{keV}})</span> using the GBAR scheme, enabling the synthesis of antideuterium (<span>(mathrm {overline{D}})</span>) via charge exchange with positronium, a technique successfully demonstrated with <span>({6,textrm{keV}})</span> antiprotons for antihydrogen production. The AD/ELENA facility is currently studying the possibility of increasing the <span>(mathrm {overline{d}})</span> rate using an optimized new target geometry. Assuming this is feasible, we propose further enhancing the anti-atom production by using laser-excited positronium in the 2<i>P</i> state within a cavity, which is expected to increase the <span>(mathrm {overline{D}}(2S))</span> production cross-section by almost an order of magnitude for <span>(mathrm {overline{d}})</span> with <span>({2,textrm{keV}})</span> energy. We present the projected precision for measuring the antideuterium Lamb shift and extracting the antideuteron charge radius, as a function of the beam flux.</p><p><span>(mathrm {overline{D}})</span> production rate assuming 1e9 ortho-<span>(textrm{Ps})</span> from a flat target interact with <span>(mathrm {overline{d}})</span> with <span>({12,mathrm{text {k}text {eV}}})</span> (blue) or inside a cavity (orange). Within the cavity, <span>(textrm{Ps})</span> can be excited to the 2<i>P</i> state, further increasing the charge exchange cross-section for <span>(mathrm {overline{d}})</span> at <span>({2,mathrm{text {k}text {eV}}})</span> (green). Cross-sections are calculated using the Convergent Close Coupling (CCC, solid) method [36] and the Coulomb-Born approximation (CBA, dashed) [37]</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjd/s10053-025-00963-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of anisotropic effective magnetic damping in epitaxial La0.67Sr0.33MnO3 film","authors":"Yibing Zhao,&nbsp;Xueqian Zhan,&nbsp;Yinjia Zhao,&nbsp;Changjun Jiang","doi":"10.1007/s00339-024-08233-9","DOIUrl":"10.1007/s00339-024-08233-9","url":null,"abstract":"<div><p>La_0.67Sr_0.33MnO₃ (i.e., LSMO), a perovskite semi-metal oxide, is renowned for its high spin polarization, elevated Curie temperature, and notably low Gilbert damping, making it a promising candidate for spintronics applications. In this study, anisotropic Gilbert damping was experimentally observed in a 20-nm thick epitaxial single-crystal LSMO/STO (sub.) film deposited by using pulsed laser deposition (PLD), exhibiting a combination of uniaxial and fourfold anisotropies, using broadband ferromagnetic resonance (FMR) at 300 K. The behavior of the damping coefficient <i>α</i>, suggests that Gilbert damping in the LSMO film predominantly arises from two-magnon scattering. Remarkably, the anisotropic effective damping showed a significant increase, from 125 to 229%, across the easy and hard magnetic axes as the temperature decreased from 300 K to 100 K. Additionally, an enhanced peak of the Gilbert damping is observed as the temperature rises to approximately 150 K, likely due to a spin reorientation transition at the LSMO/STO interface. These findings underscore the potential of LSMO thin films in spintronic devices requiring tunable magnetic damping properties.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 4","pages":""},"PeriodicalIF":2.5,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143530018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two-photon optical Ramsey–Doppler spectroscopy of positronium and muonium","authors":"Evans Javary,&nbsp;Edward Thorpe-Woods,&nbsp;Irene Cortinovis,&nbsp;Marcus Mähring,&nbsp;Lucas de Sousa Borges,&nbsp;Paolo Crivelli","doi":"10.1140/epjd/s10053-025-00960-9","DOIUrl":"10.1140/epjd/s10053-025-00960-9","url":null,"abstract":"<p>Positronium and muonium, as purely leptonic atoms without internal structure, provide ideal systems for high-precision tests of quantum electrodynamics (QED) and measurements of fundamental constants. However, the high velocities of these lightweight atoms complicate precision spectroscopy, particularly in the 1 S-2 S transition, due to transit time broadening and second-order Doppler shifts. To overcome these challenges, we propose a novel method combining two-photon Ramsey spectroscopy with a technique to correct the second-order Doppler shifts on an atom-by-atom basis. Additionally, this approach suppresses systematic effects of the AC Stark shift to a negligible level compared to the target precision. Simulations predict that for both positronium and muonium, this method could improve the measurement precision of the 1 S-2 S transition by more than two orders of magnitude compared to the current state of the art. This approach opens up new avenues for rigorous bound state QED tests and searches for physics beyond the standard model.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjd/s10053-025-00960-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A multi-analytical study of early twentieth-century industrially produced cobalt blue paints from Edvard Munch’s studio","authors":"Beatrice Giorgia Boracchi,&nbsp;Eun-Jin Strand Ferrer,&nbsp;Margherita Gnemmi,&nbsp;Laura Falchi,&nbsp;Francesca Caterina Izzo,&nbsp;Irina Crina Anca Sandu","doi":"10.1140/epjp/s13360-025-06062-0","DOIUrl":"10.1140/epjp/s13360-025-06062-0","url":null,"abstract":"<div><p>Based on the necessity of understanding the dynamics behind the darkening and degradation phenomena of cobalt blue oil paints observed in Edvard Munch’s paintings, ten industrially produced cobalt blue oil paint tubes from the artist’s studio were investigated. The synergic use of µ-Raman, ATR-FTIR, GC–MS and SEM–EDS techniques led to an overall characterization of the paints. The goal of this research was to further investigate the composition of these industrially produced cobalt blue oil paints and examine their implications in the observed deterioration and darkening phenomena in the blue painted areas in Munch’s artworks. Pigments, binding media admixtures and additives present in the manufactured formulations were assessed. The analysed paints were characterized by complex mixtures, featuring the presence of non-drying or semi-drying oils, metal soaps and preservatives. Additionally, extenders, among others clay minerals and white pigments, and adulteration with other blue pigments were identified. The extensive detection of metal soaps in the analysed paint tubes, together with the specific deterioration patterns observed in Munch’s paintings investigated, led to some preliminary considerations on the role of these components based on the reported literature.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 3","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electron and positron interactions and their applications: a tribute to Professor Michael Brunger","authors":"Márcio H. F. Bettega,&nbsp;Stephen J. Buckman,&nbsp;Dragana Marić,&nbsp;Sylwia Ptasinska,&nbsp;Ron D. White","doi":"10.1140/epjd/s10053-025-00954-7","DOIUrl":"10.1140/epjd/s10053-025-00954-7","url":null,"abstract":"","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"79 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}