Brazilian Journal of Physics最新文献_第4页

Comment on “Modulational Instability of Dust-Ion-Acoustic Modulated Envelope Structures in Ultracold Quantum Complex Plasmas: Solitons, Rogue Waves, and Breathers” 对“超冷量子复合等离子体中尘埃-离子-声学调制包络结构的调制不稳定性：孤子、异常波和呼吸子”的评论

IF 1.7 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2025-08-27 DOI: 10.1007/s13538-025-01886-8

Jit Sarkar, Asit Saha

引用次数: 0

Radiative Heat Flux Estimation in Solid Propellant Rocket Plumes 固体推进剂火箭羽流辐射热通量估算

IF 1.7 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2025-08-27 DOI: 10.1007/s13538-025-01889-5

Humberto Araujo Machado

引用次数: 0

Creatinine Sensing by Raman Spectroscopy in Multilayer Photonic Crystal 多层光子晶体中拉曼光谱检测肌酐

IF 1.7 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2025-08-26 DOI: 10.1007/s13538-025-01866-y

Ashour M. Ahmed, Mohamed Shaban

{"title":"Creatinine Sensing by Raman Spectroscopy in Multilayer Photonic Crystal","authors":"Ashour M. Ahmed, Mohamed Shaban","doi":"10.1007/s13538-025-01866-y","DOIUrl":"10.1007/s13538-025-01866-y","url":null,"abstract":"<div><p>This study presents the fabrication and characterization of a novel sensor for creatinine detection, based on a combination of one-dimensional multilayer photonic crystals (1DMPC) coated with plasmonic gold (Au) and enhanced by surface-enhanced Raman scattering (SERS) techniques. Scanning electron microscopy (SEM) confirmed a well-defined multilayer structure consisting of ten alternating layers of silicon dioxide (SiO<sub>2</sub>) and silicon nitride (SiN), capped with a uniform Au coating. Energy-dispersive X-ray spectroscopy (EDXS) verified the high purity of the elemental composition. Atomic force microscopy (AFM) revealed a textured surface with nanoscale roughness, which is favorable for enhancing electromagnetic fields. Both measured and simulated optical transmission spectra demonstrated the presence of a photonic bandgap (PBG) in the Au-1DMPC structure, which plays a critical role in light confinement and Raman signal amplification. The sensor exhibited a strong linear correlation between Raman intensity and creatinine concentration, achieving a sensitivity of 19.37 ppm (parts per million). The calculated limit of detection (LoD) was 0.902 ppm, highlighting the sensor’s capability for detecting low levels of creatinine. Additionally, the sensor demonstrated excellent selectivity, ensuring accurate chemical identification even in complex environments. These findings indicate that the Au-1DMPC sensor offers significant potential for accurate, low-concentration creatinine detection and can be extended to a wide range of sensing applications in chemical, biomedical, and clinical fields.\u0000</p></div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144905187","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}

引用次数: 0

Investigation of Higgs Phenomenology in the 3-2-3-1 Model 3-2-3-1模型中希格斯现象学的研究

IF 1.7 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2025-08-26 DOI: 10.1007/s13538-025-01891-x

P. N. Thu

{"title":"Investigation of Higgs Phenomenology in the 3-2-3-1 Model","authors":"P. N. Thu","doi":"10.1007/s13538-025-01891-x","DOIUrl":"10.1007/s13538-025-01891-x","url":null,"abstract":"<div><p>In the model based on gauge group symmetry <span>(SU(3)_Ctimes SU(2)_Ltimes SU(3)_Rtimes U(1)_X)</span> (3-2-3-1 model), we study the phenomenology of the standard model–like Higgs boson <span>(H_1)</span>, which was not considered in previous works (Dong et al., Phys. Rev. D <b>95</b>, 075034, 2017, and Huong et al., Phys. Rev. D <b>98</b>, 055033, 2018). Specifically, we study couplings of <span>(H_1)</span> with pairs of charged fermions, gauge, charged scalar bosons, and trilinear Higgs boson self-coupling by employing the <span>(kappa )</span>-framework. Based on these parameters, we explore the parameters <span>(kappa _{gamma })</span> and <span>(kappa _{Zgamma })</span> representing the <span>(H_1rightarrow gamma gamma )</span> and <span>(H_1rightarrow Zgamma )</span> decays and find that the model can fulfill both 2<span>(sigma )</span> ATLAS and CMS constraints. Besides, new physics effects to lepton flavor-violating (LFV) decays <span>(H_1rightarrow e_a^{pm }e_b^{mp })</span> (<span>(ane b)</span>) are also discussed. The result indicates that the lower bound of the new physics scale, <span>(Lambda ge 10)</span> TeV, derived from LFV decay limits, is stronger than other constraints <span>(Lambda ge 6.6)</span> TeV (for charge parameter <span>(q=0)</span>) and <span>(Lambda ge 4.6)</span> TeV (for charge parameter <span>(q=-1)</span>) for electroweak precision tests and FCNCs obtained in Dong et al. (Phys. Rev. D <b>95</b>, 075034, 2017) and Huong et al. (Phys. Rev. D <b>98</b>, 055033, 2018).</p></div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144905254","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}

引用次数: 0

Optimization of Structural, Spectral, and Dielectric Properties of Nickel-Doped Ca–Ba-Based Spinel Ferrites for Energy Storage Devices 用于储能器件的掺镍钙钡尖晶石铁氧体的结构、光谱和介电性能优化

IF 1.7 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2025-08-26 DOI: 10.1007/s13538-025-01885-9

Muhammad Zahid, Hasan M. Khan, Amjad Ali, Muhammad Tamoor Ansar, Muhammad Arshad Kamran, Mohammed A. Assiri

{"title":"Optimization of Structural, Spectral, and Dielectric Properties of Nickel-Doped Ca–Ba-Based Spinel Ferrites for Energy Storage Devices","authors":"Muhammad Zahid, Hasan M. Khan, Amjad Ali, Muhammad Tamoor Ansar, Muhammad Arshad Kamran, Mohammed A. Assiri","doi":"10.1007/s13538-025-01885-9","DOIUrl":"10.1007/s13538-025-01885-9","url":null,"abstract":"<div><p>Nickel-doped spinel ferrites having general formula Ca₀.₅Ba₀.₅₋<i>ₓ</i>Ni<i>ₓ</i>Fe₂O₄ (where <i>x</i> = 0.000, 0.125, 0.250, 0.375, 0.500) were prepared by the sol–gel auto-combustion method. Structural analysis through X-ray diffraction analysis (XRD) confirmed the formation of a single-phase, face-centered cubic spinel structure. Lattice parameter (<i>a</i>) varied between 8.40 and 8.56 Å, with crystallite sizes lying in the range of 61.43 to 75.03 nm, and the unit cell volume was measured between 592.70 and 627.22 (Å)<sup>3</sup>. The lattice parameter “<i>a</i>” varied between 8.40 and 8.56 Å, with crystallite sizes lying in the range of 61.43 to 75.03 nm, and the unit cell volume was measured between 592.70 and 627.22 (Å)<sup>3</sup>. Parameters such as interplanar spacing (d-spacing) and dislocation density were also examined, with d-spacing values ranging from 0.221 to 0.229 Å, and dislocation densities falling between 1.15 and 5.03 × 10<sup>14</sup> lines/m<sup>2</sup>. Furthermore, the study included a comprehensive evaluation of dielectric properties, including dielectric constant, dielectric and tangent loss, AC conductivity, and electric modulus, as well as quality factor (Q) values. The variations in dielectric properties observed within the 1 MHz to 3 GHz frequency range have been attributed to space-charge polarization and hopping of electrons between Fe<sup>2</sup>⁺ and Fe<sup>3</sup>⁺ ions. The frequency-dependent behavior of AC conductivity has been interpreted using the Maxwell–Wagner and Koop’s theoretical models. Experimental findings for all synthesized spinel ferrites indicate their strong potential for use in microwave absorption, energy storage, and high-frequency applications.</p></div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144904971","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}

引用次数: 0

Plasmonic Photothermal Therapy (PPTT) with Plasmonic Gold Nanoparticles in the Breast Cancer Cell Line “MDA-MB-231”: A Theoretical and Experimental Study 等离子体金纳米粒子对乳腺癌细胞系MDA-MB-231的光热治疗（PPTT）：理论和实验研究

IF 1.7 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2025-08-25 DOI: 10.1007/s13538-025-01867-x

Seyedeh Saba Mousavifard, Somayeh Salmani, Latifeh Karimzadeh Bardeei, Mohammad Hossein Majles Ara

{"title":"Plasmonic Photothermal Therapy (PPTT) with Plasmonic Gold Nanoparticles in the Breast Cancer Cell Line “MDA-MB-231”: A Theoretical and Experimental Study","authors":"Seyedeh Saba Mousavifard, Somayeh Salmani, Latifeh Karimzadeh Bardeei, Mohammad Hossein Majles Ara","doi":"10.1007/s13538-025-01867-x","DOIUrl":"10.1007/s13538-025-01867-x","url":null,"abstract":"<div><p>This study utilized plasmonic photothermal therapy (PPTT) based on localized surface plasmon resonance (LSPR) to treat the MDA-MB-231 breast cancer cell line. Initially, theoretical calculations of absorption cross-sections for various sizes and quantities of gold nanoparticles were performed via COMputational SOLutions (COMSOL) software to determine the appropriate incident wavelength for hyperthermia. The breast cancer cell lines were then treated with spherical gold nanoparticles, approximately 50 nm in size, at concentrations of 10, 20, 30, 40, 50, 60, 70, 100, and 130 μg/mL. The biocompatibility of the nanoparticles and their IC50 values were assessed via the MTT (3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyl tetrazolium bromide) assay. Subsequently, concentrations below the IC50 were selected for in vitro photothermal therapy. The cytotoxicity of the gold nanoparticles was concentration dependent, with 70 μg/mL identified as the IC50. During in vitro photothermal treatment, significant cell death was observed in the MDA-MB-231 breast cancer cell line incubated with gold nanoparticles and exposed to a laser beam (532 nm, 90 mW, 10 min), with increasing nanoparticle concentrations increasing the effect. The findings of this study demonstrate the feasibility of treating MDA-MB-231 breast cancer cell lines in vitro with plasmonic gold nanoparticles through photothermal therapy.</p></div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144897139","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}

引用次数: 0

Performance Evaluation of Fission Transmutation Layers in ARC Reactor-Based Fusion-Fission Systems 基于ARC反应堆的聚变-裂变系统中裂变嬗变层的性能评价

IF 1.7 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2025-08-23 DOI: 10.1007/s13538-025-01865-z

Karytha Merie Silva Corrêa, Claubia Pereira, Carlos E. Velasquez

{"title":"Performance Evaluation of Fission Transmutation Layers in ARC Reactor-Based Fusion-Fission Systems","authors":"Karytha Merie Silva Corrêa, Claubia Pereira, Carlos E. Velasquez","doi":"10.1007/s13538-025-01865-z","DOIUrl":"10.1007/s13538-025-01865-z","url":null,"abstract":"<div><p>The development of high-temperature superconductors allows the design of smaller fusion reactors based on tokamak-type magnetic confinement with very high magnetic fields, as presented by MIT, the affordable robust compact reactor (ARC). This research explores how these advancements could influence the design of a hybrid fusion-fission reactor (HFFR), proposing and evaluating a hybrid model based on the simplified ARC. The first part of the study focuses on the transmutation layer design determined by the optimal radial position beyond the beryllium blanket. The second part evaluates the transmutation layer insertion as a fusion-fission system using five different configurations variating the from in the number of layers used, from one homogenized transmutation layer (HF) to twelve heterogeneous transmutation layers (H12). The primary distinction between the models lies in the number of layers within the fission transmutation layer. Thus, the models were analyzed based on several parameters such as the ratio of coolant to fuel volume, multiplication factor, and the evolution of the burnup fuel. The results indicate that a coolant-to-fuel volume ratio of 2.2 significantly enhances performance. Additionally, increasing the number of fuel layers in the fission system affects both the capture and fission rates across the layers and throughout the burnup process. Notably, models H4 and H6 demonstrate superior performance, taking advantage of the hardened energy spectrum from the fusion to facilitate the transmutation of transuranic elements through fission.</p></div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144892460","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}

引用次数: 0

Neutrino-Nucleus Cross Sections by the Gross Theory of (beta )-Decay 用(beta ) -衰变的格罗斯理论计算中微子-核截面

IF 1.7 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2025-08-23 DOI: 10.1007/s13538-025-01877-9

T. S. Leite, A. R. Samana, T. J. Santos, M. dos Santos, C. De Conti, A. S. de Oliveira, M. C. dos Santos

{"title":"Neutrino-Nucleus Cross Sections by the Gross Theory of (beta )-Decay","authors":"T. S. Leite, A. R. Samana, T. J. Santos, M. dos Santos, C. De Conti, A. S. de Oliveira, M. C. dos Santos","doi":"10.1007/s13538-025-01877-9","DOIUrl":"10.1007/s13538-025-01877-9","url":null,"abstract":"<div><p>In the present work, we calculate the neutrino-nucleus cross sections, using the gross theory of <span>(beta )</span>-decay (GTBD) for a set of nuclei of astrophysical interest. We work with A-even nuclei between <span>(12leqslant A leqslant 208)</span>, preserving the allowed transitions for which our GTBD model is valid. Once the neutrino-nucleus cross sections within the GTBD model were obtained, we performed two phenomenological adjustments to these cross sections and then extrapolated the adjustment to nuclei that do not belong to the set. One of them corresponds to the usual polynomial adjustment already present in the literature. The other adjustment is of exponential type due to the behavior of the cross section with the incident neutrino energy. The exponential adjustment proved to be more effective than the polynomial adjustment. Some anomalies that existed in the calculations of the cross sections for a range of nuclei with <span>(36leqslant Z leqslant 50)</span> and <span>(44leqslant N leqslant 74)</span> were analyzed. We also carried out an extension of the cross sections for nuclei that do not belong to the ensemble and compared with other theoretical predictions from microscopic models and good agreements were achieved.</p></div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144891399","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}

引用次数: 0

Tuning the Probabilistic Distribution and the Gini Index 调整概率分布和基尼系数

IF 1.7 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2025-08-23 DOI: 10.1007/s13538-025-01879-7

Mohammad Khorrami

{"title":"Tuning the Probabilistic Distribution and the Gini Index","authors":"Mohammad Khorrami","doi":"10.1007/s13538-025-01879-7","DOIUrl":"10.1007/s13538-025-01879-7","url":null,"abstract":"<div><p>The Gini index corresponding to the wealth or income is determined by the probability distribution of the corresponding quantity. It is an indicator of the inequality (of wealth or income): If only non-negative values of the quantity are allowed, the Gini index is between zero (complete equality) and one (extreme inequality). It has been argued that the probability distribution is essentially determined stochastically. Little can be done to control the Gini index, hence the inequality. The probability distribution is a Boltzmann distribution, and trying to change it is futile. This is like the situation in thermodynamics: an effort to change the second law of thermodynamics is a lost battle. Here, it is argued that while it is correct that the most probable weights for the states are the Boltzmann weights, there is still room for controlling the probability distribution. This can be done by controlling the density of states. In this paper, some general forms of such manipulations are discussed, and their effect on the Gini index is calculated. Some examples are discussed in more detail, and it is shown that by controlling the density of states, one can fix the Gini index to any desired value.</p></div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144892421","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}

引用次数: 0

Anthocyanin Enriched Sensitizer from Fruits of Blueberry in Photoanode of DSSC—an Extensive Experimental Analysis 蓝莓果实花青素增敏剂在dssc光阳极中的应用——一个广泛的实验分析

IF 1.7 4区物理与天体物理

Brazilian Journal of Physics Pub Date : 2025-08-20 DOI: 10.1007/s13538-025-01875-x

Bagyalakshmi Shanmugam, Janarthanan Balasundaram, K. S. Radha, A. Dinesh, Chandrasekaran Joseph, Manikandan Ayyar, M. Santhamoorthy, S. Santhoshkumar, Abdullah M. S. Alhuthali, Alsharef Mohammad, Ayman A. Aly, M. Khalid Hossain

{"title":"Anthocyanin Enriched Sensitizer from Fruits of Blueberry in Photoanode of DSSC—an Extensive Experimental Analysis","authors":"Bagyalakshmi Shanmugam, Janarthanan Balasundaram, K. S. Radha, A. Dinesh, Chandrasekaran Joseph, Manikandan Ayyar, M. Santhamoorthy, S. Santhoshkumar, Abdullah M. S. Alhuthali, Alsharef Mohammad, Ayman A. Aly, M. Khalid Hossain","doi":"10.1007/s13538-025-01875-x","DOIUrl":"10.1007/s13538-025-01875-x","url":null,"abstract":"<div><p>Anthocyanin-enriched dye is extracted from the fruits of blueberry using ethanol, and citric acid is added to enhance the acidity (pH = 3 and 5) in the photoanode of DSSC, is serves as the sensitizer. Organic additive in the dye solution has enhanced the efficiency of dye dye-sensitized solar cell to a larger extent. Henceforth, the dye solution with a pH of 1(raw), followed by pHs of 3 and 5 with the addition of citric acid, is subjected to FTIR, UV–Visible, and PL spectroscopic studies. The photoanode of the TiO<sub>2</sub>-coated FTO substrate is soaked with the dye solution having a pH of 5, redox couple electrolyte of I<sup>−</sup>/I<sub>3</sub><sup>−</sup>, and the counter electrode of graphite coated over FTO is sandwiched to fabricate the DSSC. The cell is subjected to JV characterization for the determination of cell parameters, in which it has produced an efficiency of 2.152% with open circuit voltage, short circuit current density, and fill factor of 1.006 V, 3.0507 mA/cm<sup>2</sup>, and 0.701, respectively.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":499,"journal":{"name":"Brazilian Journal of Physics","volume":"55 5","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144880860","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}

引用次数: 0