物理最新文献

{"title":"High-sensitive upconversion optical thermometers derived of Y(Nb0.5Ti0.5)2O6:Er3+/Yb3+ phosphors under 808 nm and 980 nm excitation","authors":"Tallison Oliveira Abreu,&nbsp;Felipe Felix do Carmo,&nbsp;João Paulo Costa do Nascimento,&nbsp;Marcelo Antonio Santos da Silva,&nbsp;Roterdan Fernandes Abreu,&nbsp;Francisco Enilton Alves Nogueira,&nbsp;Franscisco Alekson Chaves Nobrega,&nbsp;Ronaldo Santos da Silva,&nbsp;Sergei V. Trukhanov,&nbsp;Di Zhou,&nbsp;Charanjeet Singh,&nbsp;Antonio Sergio Bezerra Sombra","doi":"10.1007/s00339-024-08148-5","DOIUrl":"10.1007/s00339-024-08148-5","url":null,"abstract":"<div><p>Y(Nb_0.5Ti_0.5)₂O₆:Er³⁺/Yb³⁺ phosphors were obtained through the solid state reaction method, where the temperature dependence of up-conversion luminescence properties under 980 nm and 808 nm excitation and the potential application as optical temperature sensor were evaluated. Measurements of X-ray diffraction the formation of a single phase in all the samples analyzed. Phosphors synthetized were excited at 980 nm and 808 nm, where was observed green and red emissions correlated to transitions from Er³⁺ ions. The power-dependent study demonstrated that filling the levels referring to the green and red emissions involves two-photon processes for both excitations evaluated. Moreover, possible mechanistic proposals for the YNT: Er³⁺/Yb³⁺ system at 980 nm and 808 nm were elaborated based on the up-conversion (UC) emission dependence on pump power. Optical temperature-sensing properties were evaluated through fluorescence intensity ratio (FIR) technique, where relative (S_R) and absolute (S_abs) sensitivities were obtained employing thermally coupled levels (TCL) and non-thermally coupled levels (NTCL) from Er³⁺ ions. S_abs and S_R values were compared with the other sensors based on ceramics and demonstrated that YNT: Er³⁺/Yb³⁺ system presented sensitivities values near or greater than these phosphors, indicating that the YNT: Er/Yb phosphors could be employing as optical temperature sensors in the high-temperature region.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844947","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":"Novel green synthesis of TiO2 from tea leaves: removal of methylene blue for photocatalytic application","authors":"Medina Mehenaoui,&nbsp;Nadia Chekir,&nbsp;Djilali Tassalit,&nbsp;Melissa Brachemi,&nbsp;Nada Bensadok,&nbsp;Seif El Islam Lebouachera","doi":"10.1140/epjp/s13360-024-05849-x","DOIUrl":"10.1140/epjp/s13360-024-05849-x","url":null,"abstract":"<div><p>The prevalence of dyes in nature has a significant impact on water quality and pollution. Water pollution has received much attention in recent years because of the importance of this resource to humankind’s long-term development, its scarcity as a result of industrialization, pollution, and the effects of climate change. Much research has been conducted on wastewater treatment and the removal of pollutants using photocatalysis, which employs various nanoparticles. Green synthesis, which uses plant extracts, is a simple, nontoxic, cost-effective, and environmentally friendly method for producing nanoparticles like titanium dioxide. This study uses green tea leaf extract to synthesize titanium dioxide nanoparticles (TiO₂ NPs) at temperatures of 400, 500, and 600°C using a green process, with the view of testing their efficiency for the photocatalytic removal of methylene blue dye from water under solar irradiation. TiO₂ NPs synthesized at 500°C showed good dye degradation over time (76%) compared to those synthesized at 400°C (51%) and 600°C (54%). At 500°C, the TiO₂ NPs are thoroughly characterized using XRD, SEM–EDS, UV–Vis spectroscopy, ATR-IR spectroscopy, and XRF. The results confirm the formation of nanoparticles. Titanium dioxide is of nanometric order, with an average crystallite size of approximately 15.2, according to XRD analysis. As a result, this study presents a green solution with a high potential for these nanoparticles to degrade the pollutant MB. These nanoparticles can be improved and used to degrade other pollutants through photocatalysis, as well as to contribute to water purificationQuery.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"139 12","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844895","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":"New trends in statistical physics of complex systems: theoretical and experimental approaches","authors":"Giorgio Kaniadakis,&nbsp;Tiziana Di Matteo,&nbsp;Antonio Maria Scarfone,&nbsp;Giampiero Gervino","doi":"10.1140/epjb/s10051-024-00832-y","DOIUrl":"10.1140/epjb/s10051-024-00832-y","url":null,"abstract":"<div><p>This issue contains peer-reviewed papers based on selected contributions presented at the International Conference on Statistical Physics (SigmaPhi) held in Chania-Crete (Greece) from July 10th to July 14th, 2023 (http://sigmaphisrv.polito.it/). The challenge facing statistical physics today is expanding beyond conventional conceptions of physics, bringing together multiple research streams that were thought to be separate and independent for the majority of the 20th century. In this topical issue, we present a collection of papers that demonstrate the current applications of statistical physics in a variety of different fields, including networks, biophysics, statistical mechanics, kinetic theory, and cosmology.</p></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"97 12","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845098","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}

{"title":"Influence mechanism insight of BiVO4 microstructure on its photocatalytic performance","authors":"Yingyuan Hu,&nbsp;Wenlong Zhang,&nbsp;Meizhao Xue,&nbsp;Rui Lv,&nbsp;Ao Li","doi":"10.1007/s00339-024-08169-0","DOIUrl":"10.1007/s00339-024-08169-0","url":null,"abstract":"<div><p>In this work, a series of monoclinic crystal bismuth vanadate (m-BiVO₄) photocatalysts with different morphology were prepared by regulating precursor solution pH value during hydrothermal reaction. The influence mechanism of m-BiVO₄ microstructure on photodegrading tetracycline hydrochloride (TC-HCl) performance were explored by the techniques of X-ray diffraction pattern (XRD), raman spectroscopy, fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray photoelectron spectra (XPS), UV-vis diffuse reflectance spectrum (UV-vis DRS), nitrogen adsorption-desorption isotherms, photocurrent (PC), photoluminescence spectra (PL) and electronic spin resonance spectra (ESR). The results reveal that the precursor solution pH value plays a great effect both on the preferential crystal growth of the m-BiVO₄ oriented along {040} facet and the formation of different morphology structures. Among all-prepared samples, the pH 4 sample (BV4) with small particle size and large specific surface area presents the best photogenerative carrier separation ability and the strongest intensity of the ·O₂⁻, which are responsible for its optimum photocatalytic performance, and the degradation rate of TC-HCl reaches more than 53% after 5 min under visible light irradiation. It is concluded that specific surface area and particle size instead of exposed crystal facet and light absorption ability of as-prepared samples, play more important role in improving the separation and utilization efficiency of electron-hole pairs and their photocatalytic activity.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844889","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":"Unveiling the structural, elastic, magnetic, electronic and thermoelectric properties of 4d–3d transition metals based half-Heuslers RuCrM (M = Si, Ge, Sn, Sb): a systematic DFT and DFT + U study","authors":"M. Musa Saad H.-E.,&nbsp;B. O. Alsobhi","doi":"10.1140/epjb/s10051-024-00843-9","DOIUrl":"10.1140/epjb/s10051-024-00843-9","url":null,"abstract":"<div><p>In recent era, there has been a boosting inclination towards the investigation of Heusler materials, owing to their extensive applications in thermoelectronics and optospintronics. The structural, elastic, electronic, magnetic and thermoelectric properties of RuCrM (M = Si, Ge, Sn, Sb) half-Heuslers are systematically studied by using the DFT and DFT + U methods. The calculated results of lattice constant and bulk modulus are in good agreement with the existing theoretical data for similar RuCrM systems. The magnetic and electronic properties reveal that RuCrM are FM metallic materials. In addition, the two types of doping by electrons and holes at various temperatures are investigated for RuCrM, and their optimum structural type is estimated. This study concludes that the U energy has the potential to enhance the properties of RuCrM. Such remarkable properties provide strong evidence that the stable compounds of RuCrM are suitable and promising materials for future thermoelectronics and optospintronics applications.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"97 12","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844797","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}

{"title":"Modeling the electron density distribution with a nonthermal-nonextensive function for nonlinear laser–plasma interactions","authors":"Lyes Djebarni,&nbsp;Fayçal Hadj-Larbi,&nbsp;Djamila Bennaceur-Doumaz","doi":"10.1007/s00340-024-08369-9","DOIUrl":"10.1007/s00340-024-08369-9","url":null,"abstract":"<div><p>The mixed nonthermal-nonextensive electron density distribution function is increasingly used to describe various types of plasmas, but to the best of our knowledge, there is no report on the use of this new kind of functions to describe nonlinear laser-collisionless plasma interaction with the approach proposed here. In this contribution, we generalized the Tribeche-Tsallis-Cairns hybrid distribution to describe our plasma by the above-mentioned function, and nonextensive ions. By using the Maxwell equations, the relativistic two-fluid model and the slowly-varying-amplitude approximation, we derived equations for the description of the nonlinear dynamics of a circularly-polarized laser-beam interacting with collisionless non-Maxwellian magnetized plasma. Taking into account the ponderomotive force, the external magnetic field, and other plasma parameters, we found that the latter cause and affect some nonlinear phenomena in the considered plasma. These phenomena include the modulational instability (MI), the envelope solitary waves, and the laser-beam self-focusing. The present work investigates analytically and numerically these nonlinear phenomena. The results show that the existence of the electron density, with a high-energy particles hybrid distribution function tail, and other factors play an essential role in the plasma nonlinearity features. We noted that the more the electron and ion density distributions tend to the Maxwellian form, the nonlinearity and the MI’s growth rate increase, the envelope solitary waves amplitude decreases, and the laser-beam self-focusing property enhances. Our contribution generalizes some previous models describing laser-plasma interactions, and suggests that the above-mentioned function could be a good candidate to describe simulations and experiments involving nonlinear laser-collisionless plasma interactions.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844888","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":"Synchrotron-based diffraction-enhanced imaging and diffraction-enhanced imaging combined with CT X-ray imaging systems to image seeds at 30 keV","authors":"D. V. Rao,&nbsp;G. E. Gigante,&nbsp;Z. Zhong,&nbsp;R. Cesareo,&nbsp;A. Brunetti,&nbsp;N. Schiavon,&nbsp;T. Akatsuka,&nbsp;T. Yuasa,&nbsp;T. Takeda","doi":"10.1007/s00339-024-08122-1","DOIUrl":"10.1007/s00339-024-08122-1","url":null,"abstract":"<div><p>Utilized the upgraded Synchrotron-based non-destructive Diffraction-enhanced imaging and Diffraction-enhanced imaging coupled with CT X-ray imaging systems to image the chickpea seeds, to enhance the contrast in plant root architecture, visibility of fine structures of root architecture growth and some aspects of physiology at acceptable level. DEI-CT images were acquired with 30 keV synchrotron X-rays. A series of DEI-CT slices were assembled together, to form a 3D data set. DEI-CT images explored more structural information and morphology. Noticed detailed anatomical, physiological observations, and contrast mechanisms. With these systems, some of the complex plant traits, root morphology, growth of laterals and subsequent laterals can be visualized directly.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844892","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":"Assessing the potential of upcoming laser-driven neutron sources and their practical applications for industry and society","authors":"Marc Zimmer,&nbsp;Thomas F. Rösch,&nbsp;Stefan Scheuren,&nbsp;Thomas Seupel,&nbsp;Tim Jäger,&nbsp;Jonas Kohl,&nbsp;Daniel Hofmann,&nbsp;Gabriel Schaumann,&nbsp;Markus Roth","doi":"10.1140/epjp/s13360-024-05879-5","DOIUrl":"10.1140/epjp/s13360-024-05879-5","url":null,"abstract":"<div><p>Laser-driven neutron sources (LDNS) are an emerging technology with significant potential. The most promising types of LDNS are based on laser wakefield acceleration or target normal sheath acceleration, driven in a “pitcher-catcher” configuration. In this publication, we estimate the performance of LDNS once they have been optimized for industrial-scale usage and identify for which applications they can be used. For this purpose, we evaluate the current laser developments and identify the three most promising laser systems that can be used to cover the most relevant applications. A scaling system is then derived to predict the neutron production rate for each of the three systems. The first system is expected to produce <span>(8 times 10^{8},hbox {n},hbox {s}^{-1})</span> to <span>(8 times 10^{9},hbox {n},hbox {s}^{-1})</span> for thermalized neutrons. The second one <span>({1 times 10^{11}},hbox {n},hbox {s}^{-1})</span> for fast neutrons and the third one <span>(1 times 10^{14},hbox {n},hbox {s}^{-1})</span> to <span>(1 times 10^{15},hbox {n},hbox {s}^{-1})</span> fast neutrons. This is followed by an evaluation of possible applications that can be driven with each of the different LDNS system. We conclude with a comparison of the scaling law and the neutron production rate to existing experimental data and scaling laws from other groups to evaluate the accuracy of the model and the estimates for the different applications.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"139 12","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjp/s13360-024-05879-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Quantum energy teleportation in phase space quantum mechanics","authors":"Mar Sánchez-Córdova,&nbsp;Jasel Berra-Montiel","doi":"10.1140/epjp/s13360-024-05897-3","DOIUrl":"10.1140/epjp/s13360-024-05897-3","url":null,"abstract":"<div><p>In this paper, we investigate the quantum energy teleportation protocol within the phase space formulation of quantum mechanics. By employing the Wigner quasi-probability distribution and the star product, we show that the teleported energy is proportional to the amount of entanglement present in the initial ground state. Further, we introduce the Husimi <i>Q</i>-function on a Bloch coherent state in order to determine the Wehrl entropy of the system. Finally, the Wehrl entropy enables us to compute the consumption of coherence and entanglement throughout the protocol.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"139 12","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844862","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":"Fracture failure behavior of Al2O3 fabric under the combined interaction of high-temperature heat flow and tensile load","authors":"Kai Guo,&nbsp;Zhenyu Zhang,&nbsp;Hongxiang Cao,&nbsp;Mengzhou Chang,&nbsp;Chuang Chen,&nbsp;Enling Tang","doi":"10.1140/epjp/s13360-024-05818-4","DOIUrl":"10.1140/epjp/s13360-024-05818-4","url":null,"abstract":"<div><p>The aircraft will be subjected to severe aerodynamic and thermal effects during the reentry of the spacecraft into the earth’s atmosphere. Flexible woven structure plays an important role in thermal protection of aircraft surface, and Al₂O₃ fiber fabric is an important candidate material in weaponry, aerospace and other fields, which puts forward higher requirements for the prediction of mechanical properties at high temperature. In this paper, the extreme environment faced by the thermal protection structure during the high-speed entry/reentry of spacecraft is simulated by using the self-built loading and testing system of oxygen–methane high-temperature heat flow and mechanical stretching. Based on the experimental data, the finite element model of Al₂O₃ fabric was constructed. Combined with the stress–strain relationship and physical parameters of the material, the fracture process of Al₂O₃ fiber fabric under the combined action of high-temperature heat flow and tensile load was simulated. The results show that due to the poor high-temperature stability of amorphous SiO₂ phase in Al₂O₃ fiber under high-temperature heat flow, the surface defects of the fiber surface increase due to hot corrosion, which reduces the mechanical properties of the fabric. The breaking strength, elongation at break, elastic modulus and strength limit of Al₂O₃ fabric at 1300 °C were 0.318 kN/cm, 9.108%, 319 MPa, 51.1 MPa (plain) and 0.412 kN/cm, 3.356%, 720 MPa, 58.44 MPa (twill), respectively. Due to the different forms of fabric structure, warp yarns exhibit varying degrees of buckling. Under the action of tensile load, the warp yarn is from buckling to straightening, so that the stress–strain relationship of Al₂O₃ fabric has nonlinear characteristics. The nonlinear Ogden model can well simulate the deformation process of Al₂O₃ fabric under high-temperature heat flow.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"139 12","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844861","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}