Results in Physics最新文献

{"title":"Phase, structural and thermodynamic analysis of nanocrystalline yttrium oxide (Y2O3) for optical applications","authors":"S. Surya ,&nbsp;Sakthivel Pandurengan ,&nbsp;S. Gokul Raj ,&nbsp;G. Ramesh Kumar","doi":"10.1016/j.rinp.2025.108377","DOIUrl":"10.1016/j.rinp.2025.108377","url":null,"abstract":"<div><div>This research work targets on the production of Nanocrystalline yttrium oxide (Y₂O₃) Quantum Dots (QDs) where Quantum Confinement Effect plays a vital role on account of varying the annealing temperature and focuses on exploring the thermodynamics of the different sized Y₂O₃ Nanocrystalline QDs. Nanocrystalline yttrium oxide (Y₂O₃) was synthesized using a simple, one-step precipitation method and the resulting powder was annealed at various temperatures 500, 750 and 1000 °C. Simultaneous Thermogravimetric analysis and Differential Scanning Calorimetry (TG-DSC) analysis were performed to monitor the phase transformation of the Y₂O₃ nanoparticles (NPs) from amorphous to crystalline states. By varying the heating rates (5, 10, 15, and 20 °C/min), the activation energy for crystallization was calculated using kinetic models such as Kissinger and Ozawa. Powder X-ray diffraction (XRD) analysis confirmed the formation of single-phase Y₂O₃ nanoparticles in which the annealed samples exhibited a cubic structure corresponding to the Ia3 space group, in good agreement with the standard JCPDS pattern No. 41-1105. Annealing to higher temperatures led to an increase in crystallite size, which was estimated using the Scherrer formula to range between 5 to 12 nm in which the annealed Y₂O₃ nanoparticles at 500 °C shows the least crystallite size of 5 nm. The micro strain (ε), arising from thermal expansion and contraction, was evaluated using the Williamson–Hall (W–H) plot. UV–Visible absorption spectroscopy revealed good transparency in the UV–Vis region; using the absorption coefficient (α), the Tauc’s plot indicated a wide band gap for the material. Photoluminescence (PL) analysis were carried out for asprepared and annealed samples which shows that the emission intensity increase with respect to the increase in annealing temperature. Additionally, Fourier-transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS) were employed to study the chemical bonding and oxidation states of the Y₂O₃ nanoparticles, respectively. The morphology and the size of the synthesized as prepared samples and the samples annealed at various calcination temperatures were visualized using Scanning electron microscope (SEM) and Transmission electron microscope (TEM) and the results were discussed in detailed</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"76 ","pages":"Article 108377"},"PeriodicalIF":4.6,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144772313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"SnO2:F/β-Ga2O3 thin-film heterojunctions as sensitive photodetectors for short-wavelength UV radiation","authors":"Mehran Vaezi ,&nbsp;Ali Shirpay ,&nbsp;M.M. Bagheri-Mohagheghi","doi":"10.1016/j.rinp.2025.108375","DOIUrl":"10.1016/j.rinp.2025.108375","url":null,"abstract":"<div><div>Monitoring UVC radiation from the ozone hole is crucial due to its harmful effects on both the environment and human health. To address this need, photodetectors operating in the short-wavelength ultraviolet (UVC) region are essential. In this study, optical photodetectors based on thin films of fluorine-doped tin oxide (SnO₂:F or FTO) and gallium oxide (β-Ga₂O₃) were fabricated using the spray pyrolysis technique. Initially, individual thin films of SnO₂:F and β-Ga₂O₃ were prepared and characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), UV–Vis spectroscopy, and current–voltage (I–V) measurements. Subsequently, photodetectors composed of stacked SnO₂:F/β-Ga₂O₃ thin films were fabricated, and their photoresponse was evaluated by varying the concentration of Ga₂O₃. Among the tested concentrations, the device with 0.2 M Ga₂O₃ exhibited the best performance, with a sensitivity of 6.62 × 10⁻², an external quantum efficiency (EQE) of 233.92 %, and a responsivity of 47.72 mA/W. These results suggest that SnO₂:F/β-Ga₂O₃ thin-film photodetectors are promising candidates for UVC detection and can be effectively utilized in environmental monitoring applications, such as ozone hole observation.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"76 ","pages":"Article 108375"},"PeriodicalIF":4.6,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144772311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Three-dimensional carbon framework encapsulated Sn-MOF derived Li2SnO3 as an anode material for high performance Li-ion battery","authors":"Xin Qiao ,&nbsp;Zuxin Xu ,&nbsp;Hailong Qiu ,&nbsp;Di Jin","doi":"10.1016/j.rinp.2025.108376","DOIUrl":"10.1016/j.rinp.2025.108376","url":null,"abstract":"<div><div>This study presents a facile synthesis strategy for a high-performance Li₂SnO₃/three-dimensional carbon (3DC) composite anode for lithium-ion battery. A precursor mixture containing Sn-based metal–organic-framework (Sn-MOF) is transformed into a hierarchical architecture featuring uniformly distributed Li₂SnO₃ nanoparticles embedded within a robust 3DC matrix. The engineered 3DC framework exhibits dual functionality: suppressing Li₂SnO₃ particles agglomeration and buffering volume fluctuations during lithiation/delithiation, thereby significantly enhancing structural stability and electronic conductivity. Electrochemical evaluations demonstrate exceptional performance, with Li₂SnO₃/3DC delivering a reversible capacity of 699.9 mAh g⁻¹ after 800 cycles at 0.5 A g⁻¹ and maintaining 346.2 mAh g⁻¹ at 2 A g⁻¹. The superior rate capability and pseudocapacitive contribution are attributed to accelerated charge transport kinetics enabled by the conductive 3D carbon network. This work not only demonstrates a promising anode design for next-generation lithium-ion batteries but also provides critical insights into the synergistic integration of MOF-derived precursors and sacrificial templating for advanced energy storage materials.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"76 ","pages":"Article 108376"},"PeriodicalIF":4.6,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144720765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Optimizing mechanical entanglement using squeezing and parametric amplification","authors":"Muhdin Abdo Wodedo ,&nbsp;Tesfay Gebremariam Tesfahannes ,&nbsp;Tewodros Yirgashewa Darge ,&nbsp;Berihu Teklu","doi":"10.1016/j.rinp.2025.108364","DOIUrl":"10.1016/j.rinp.2025.108364","url":null,"abstract":"<div><div>We propose a scheme of an optomechanical system that optimizes entanglement in nanomechanical resonators through quantum state transfer of intracavity squeezing and squeezed reservoir field sources assisted by radiation pressure. The system is driven by red-detuned laser fields, which enable simultaneous cooling of the mechanical resonators and facilitate the quantum state transfer in a weak coupling and good cavity limit. Specifically, the mechanical entanglement is quantified using logarithmic negativity within the bipartite Gaussian states of the two mechanical modes. The results show that several key parameters, including the parametric phase and nonlinear gain of the non-degenerate optical parametric amplifier, the strength of the squeezing reservoir, optomechanical cooperativity, thermal excitation of phonons, and the temperature of mechanical baths, strongly influence the degree of mechanical entanglement. Hence, the findings indicate that careful tuning of the parameters can enable control over the enhancement of entanglement robustness, suggesting that this optomechanical scheme provides a viable pathway for applications in quantum sensing and information processing</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"76 ","pages":"Article 108364"},"PeriodicalIF":4.4,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144713132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Reduction of multiple filamentation due to atmospheric turbulence during the propagation of a laser pulse","authors":"Alain Bourdier ,&nbsp;Hassen Ghalila ,&nbsp;Olivier Delage","doi":"10.1016/j.rinp.2025.108371","DOIUrl":"10.1016/j.rinp.2025.108371","url":null,"abstract":"<div><div>Multiple filamentation poses a significant challenge for laser pulse propagation in the atmosphere. The purpose of this article is to explore how atmospheric turbulence influences the development of modulational instability, which results in multiple filamentation. We confirm a result that we previously published. We show through multiple analytical approaches that the growth rate of this instability decreases when the refractive index displays stochastic behavior.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"76 ","pages":"Article 108371"},"PeriodicalIF":4.6,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144771173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Dielectric property enhancement and environmental stability in (AlxCr0.05−x)Nb0.05Ti0.9O2 ceramics: influence of Al3+/Cr3+ ratio and Al3+ site preference","authors":"Porntip Siriya ,&nbsp;Jurimart Wongsricha ,&nbsp;Nutthakritta Phromviyo ,&nbsp;Atchara Khamkongkaeo ,&nbsp;Wirat Jarernboon ,&nbsp;Pornjuk Srepusharawoot ,&nbsp;Prasit Thongbai","doi":"10.1016/j.rinp.2025.108374","DOIUrl":"10.1016/j.rinp.2025.108374","url":null,"abstract":"<div><div>The development of TiO₂-based ceramics with enhanced dielectric properties and environmental stability is crucial for next–generation capacitor applications. In this study, (Al<em>_x</em>Cr_0.05–<em>_x</em>)Nb_0.05Ti_0.9O₂ ceramics (<em>x</em> = 0, 0.005, 0.01, and 0.025) were synthesized to investigate the role of Al³⁺/Cr³⁺ ratio and Al³⁺ site preference on dielectric behavior. All sintered ceramics exhibited a single–phase rutile TiO₂ structure with dense microstructures and uniform elemental distribution. Raman and structural analyses indicated the presence of oxygen vacancies in Cr_0.05Nb_0.05Ti_0.9O₂, which were significantly reduced upon Al³⁺ incorporation, suggesting a predominant interstitial occupation of Al³⁺. Partial substitution of Cr³⁺ with Al³⁺ improved densification and grain growth, likely due to interstitial diffusion. Although Cr_0.05Nb_0.05Ti_0.9O₂ showed a high dielectric permittivity (ε′ ≈ 60,500 at 1 kHz), it suffered from a high loss tangent (tanδ ≈ 0.3) and poor frequency and temperature stability. With increasing Al³⁺ content, ε′ remained above 10⁴ while tanδ decreased below 0.1, and both frequency and temperature stability were greatly improved. The dielectric variation under 30–95 % RH was less than 4.2 %, and long–term aging over 5 years resulted in &lt;1.2 % deviation, demonstrating excellent environmental stability. Impedance spectroscopy confirmed electrically heterogeneous microstructures composed of semiconducting grains and insulating grain boundaries, suggesting that the giant dielectric response arises from an interfacial polarization mechanism. These results highlight the promising potential of (Al<em>_x</em>Cr_0.05–<em>_x</em>)Nb_0.05Ti_0.9O₂ ceramics for robust dielectric capacitor applications.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"75 ","pages":"Article 108374"},"PeriodicalIF":4.4,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Self-absorption correction in LIBS-based lithium isotope analysis with a modified 1D U-Net","authors":"Sungyong Shim ,&nbsp;Tuyen Ngoc Tran ,&nbsp;Dae Hyun Choi ,&nbsp;Duksun Han","doi":"10.1016/j.rinp.2025.108373","DOIUrl":"10.1016/j.rinp.2025.108373","url":null,"abstract":"<div><div>Lithium isotopes, particularly ⁶Li, play a crucial role as tritium breeding materials in nuclear fusion research and are essential components of fusion fuel. Laser-Induced Breakdown Spectroscopy (LIBS) offers a rapid and preprocessing-free method for isotope analysis. However, strong self-absorption effects cause spectral distortion, complicating the precise determination of isotope ratios. This study proposes a deep learning-based modified 1D U-Net model to address self-absorption effects. Our model was trained using simulation data, which was validated against two types of experimental data: measured spectral data minimizing self-absorption effects and self-reversal spectrum data. This proposed model effectively corrected self-absorption effects resulting in an accurate restoring the central wavelengths of peaks critical to isotope ratio analysis. This research highlights the potential of deep learning in resolving a challenge of self-absorption for LIBS-based lithium isotope analysis, demonstrating that training solely on simulation data can achieve effective results.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"75 ","pages":"Article 108373"},"PeriodicalIF":4.6,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144722588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Interaction mechanisms between C15 Laves phase clusters and 〈1 1 1〉 dislocation loops in BCC-Fe: An atomistic perspective","authors":"Amin Esfandiarpour","doi":"10.1016/j.rinp.2025.108366","DOIUrl":"10.1016/j.rinp.2025.108366","url":null,"abstract":"<div><div>Small C15 Laves phase clusters are extended interstitial defects that form during collision cascades in body-centered cubic (BCC) iron. Although their stability has been confirmed by ab initio calculations up to a certain size, their interactions with other irradiation-induced defects, such as dislocation loops, remain poorly understood. In this study, we use molecular dynamics (MD) and molecular statics (MS) simulations to investigate the interaction mechanisms between C15 clusters and /2〈1 1 1〉 prismatic dislocation loops in BCC-Fe at elevated temperatures (600–1000 K). By systematically varying the relative size and positioning of these defects, we identify three distinct interaction modes: absorption, repulsion, and confinement. Absorption events lead to a range of outcomes depending on the interaction geometry, including complete merging into 1/2〈1 1 1〉 or 〈1 0 0〉 dislocation loops, or the formation of mixed clusters. Stress field analysis reveals that the nature of these interactions is governed by the overlap of elastic fields, with repulsive or attractive behavior arising from the alignment of tensile and compressive regions. These findings provide new atomistic insights into the role of C15 clusters in microstructural evolution under irradiation and offer valuable input parameters for higher-scale modeling techniques such as object kinetic Monte Carlo (OKMC).</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"75 ","pages":"Article 108366"},"PeriodicalIF":4.4,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Synergistic enhancement of SERS and superhydrophobicity on Si micropatterns fabricated with two-beam laser interference lithography","authors":"Sadaf Saeed ,&nbsp;Mohamed Hassan Eisa ,&nbsp;Ali Zia ,&nbsp;Kinza Arshad","doi":"10.1016/j.rinp.2025.108365","DOIUrl":"10.1016/j.rinp.2025.108365","url":null,"abstract":"<div><div>This study introduces a novel approach for enhancing both surface-enhanced Raman scattering (SERS) sensitivity and super-hydrophobicity of silicon micropatterns (SiMPs) fabricated through two-beam laser interference lithography (TBLIL). By integrating micro/nanostructured Si surfaces with superior SERS performance and hydrophobic properties, this platform holds promise for advanced sensing and self-cleaning applications. The TBLIL method offers precise control over micropattern geometry and periodicity, creating localized “hot spots” that amplify the Raman signals, facilitating the detection of low-concentration analytes with high sensitivity. Additionally, the microstructured surface ensures superhydrophobicity, prevents contamination, and enhances the stability and reproducibility of SERS measurements. Characterization techniques, including scanning electron microscopy (SEM), Atomic force microscope (AFM), Raman spectroscopy, and contact angle measurements, confirmed significant improvements in the SERS sensitivity and durability of the superhydrophobic surface. This dual-functional platform opens new avenues in biosensing, environmental monitoring, and surface coatings, offering a versatile solution to challenges in materials science and nanotechnology.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"75 ","pages":"Article 108365"},"PeriodicalIF":4.4,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144672187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Nonequilibrium spin dynamics in the chiral soliton lattice host YbNi3Al9","authors":"Yamei Wang ,&nbsp;Haonan Jin ,&nbsp;Jiefeng Cao ,&nbsp;Rui Yu ,&nbsp;Junqin Li ,&nbsp;Wei Tong ,&nbsp;Junmin Xu ,&nbsp;Fangyuan Zhu ,&nbsp;Yong Wang ,&nbsp;Lei Zhang ,&nbsp;Renzhong Tai","doi":"10.1016/j.rinp.2025.108336","DOIUrl":"10.1016/j.rinp.2025.108336","url":null,"abstract":"<div><div>The uniaxial chiral magnetic material YbNi₃Al₉ is proposed as a host for a chiral soliton lattice (CSL). In this study, we thoroughly investigate the spin dynamics in YbNi₃Al₉ single crystals using magnetization (<span><math><mi>M</mi></math></span>)-relaxation and electron spin resonance (ESR) techniques. The <span><math><mi>M</mi></math></span>-relaxation analysis clearly reveals characteristics of a nonequilibrium CSL in YbNi₃Al₉. A prolonged relaxation is observed in the highly-nonlinear-CSL state, indicating nonequilibrium spin dynamics during the annihilation or nucleation of chiral magnetic solitons, consistent with the unfrustrated magnetic cluster model. The ESR study shows significant microwave responses when the magnetic field is applied perpendicular to the <span><math><mi>c</mi></math></span>-axis (<span><math><mrow><mi>H</mi><mo>⊥</mo><mi>c</mi></mrow></math></span>), while a weak response is observed when the field is aligned with the <span><math><mi>c</mi></math></span>-axis (<span><math><mrow><mi>H</mi><mo>/</mo><mo>/</mo><mi>c</mi></mrow></math></span>). Two resonance lines are identified for <span><math><mrow><mi>H</mi><mo>⊥</mo><mi>c</mi></mrow></math></span>. The resonance signal at lower fields is attributed to the Goldstone excitation of chiral magnetic solitons, while the signal at higher fields is associated with ferromagnetic resonance. These findings enhance our understanding of the nonequilibrium spin dynamics of the CSL in YbNi₃Al₉ single crystals and are beneficial for the application of chiral magnetic solitons in spintronics.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"75 ","pages":"Article 108336"},"PeriodicalIF":4.4,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144687289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}