Results in Physics最新文献

{"title":"The role of reaction temperature in synthesizing clove-derived copper oxide nanoparticles for brain cancer treatment","authors":"Mehrnoosh Fakhredin,&nbsp;Fatemeh Shariatmadar Tehrani,&nbsp;Maryam Aliannezhadi","doi":"10.1016/j.rinp.2024.108101","DOIUrl":"10.1016/j.rinp.2024.108101","url":null,"abstract":"<div><div>The study investigates the effects of reaction temperature (25°C, 50°C, and 80°C) and calcination on copper oxide nanoparticles (CuO NPs) synthesized by the bio-sol–gel method using clove extract. The results demonstrate the significant impact of reaction temperature on the properties of both as-synthesized and calcined nanoparticles produced by the bio-sol–gel method. The results show that reaction temperature significantly controls the crystalline properties of the as-synthesized samples, however, it is not a significant factor in the crystalline nature of the calcined samples. The increase in reaction temperature enhances the crystallite size for both as-synthesized and calcined nanoparticles. Additionally, it is verified that the calcination process influenced the structural, morphological, and optical properties of the synthesized nanoparticles, yielding narrow-band gap CuO NPs in monoclinic crystalline structure in all reaction temperatures. Notably, CuO NPs obtained at a reaction temperature of 50°C exhibited better primary properties, facilitating their potential application in cancer treatment. Brain tumors constitute a disproportionately significant contributor to the overall cancer mortality burden, particularly in cases where surgical intervention is not a viable treatment option. Therefore, the efficacy of the selected bio-synthesized CuO NPs is systematically assessed within the context of cancer treatment, with a particular emphasis on their effects on the C6 brain tumor cell line. The CuO NPs displayed remarkable anti-cancer activity against the C6 cell line, with increased drug concentrations in the wells resulting in high cytotoxicity. Significant cytotoxic effects were observed with the selected CuO NPs at a concentration of 35 µ g/mL.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"68 ","pages":"Article 108101"},"PeriodicalIF":4.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Exploring the implications of ternary Jeffrey nanofluid on pulsating flow and heat transfer through unsymmetrical corrugated micro conduit","authors":"Mohamed S. Abdel-wahed ,&nbsp;Khaled S. Mekheimer ,&nbsp;Ahmed Y. Sayed ,&nbsp;Shaaban I. Ahmed","doi":"10.1016/j.rinp.2024.108069","DOIUrl":"10.1016/j.rinp.2024.108069","url":null,"abstract":"<div><div>Pulsatile flow occurs in medical devices, impacting heat transfer and fluid behavior. It has practical significance in several disciplines, including thermodynamic devices. Pulses in flow and pressure influence pipe systems, reciprocating pumps, and compressors. Motivated by this, we simulated corrugated microchannel with Jeffery fluid flow enhanced by tri-nanoparticles to investigate this type of flow in detail. The model assumed that, in addition to external temperature influences, conduit walls experience electric and magnetic fields, governed by momentum and heat equations, along with electric potential and pulsing pressure equations. Using the perturbation method and Mathematica software, we derived semi-analytical solutions for the governing partial differential equations in their complex form. nanoparticle-enhanced blood exhibits improved thermal performance compared to pure fluid, with the type and concentration of nanoparticles (Fe₃O₄, Au, SWCNTs) significantly impacting heat dissipation and temperature distribution within the microfluidic conduit. Higher nanoparticle concentrations increase liquid viscosity, reducing velocity inside the conduit; however, a magnetic field can reverse this effect. This study underscores the application of pulsatile flow in heart pumps, where optimizing thermal characteristics can enhance device efficiency and patient outcomes.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"68 ","pages":"Article 108069"},"PeriodicalIF":4.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Computational analysis of Newtonian fluid in a 2-D square cavity with kinetic energy, enstrophy, and palinstrophy in the presence of bottom corner obstacle","authors":"Dalmalka Praveen Kumar ,&nbsp;Yadagiri Rameshwar ,&nbsp;Rifaqat Ali ,&nbsp;S. Nazari ,&nbsp;Mohamed Kallel ,&nbsp;Ahmed M. Galal","doi":"10.1016/j.rinp.2024.108086","DOIUrl":"10.1016/j.rinp.2024.108086","url":null,"abstract":"&lt;div&gt;&lt;div&gt;Understanding the impact of obstacles on lid-driven cavity (LDC) flows is critical for advancing flow control and optimization in fluid dynamics. In this study, we numerically investigate steady, two-dimensional Newtonian fluid flow within a square cavity featuring a lid-driven motion at Reynolds number &lt;em&gt;Re&lt;/em&gt; = 100 by solving governing equations with the Fractional Step Method on a staggered grid in the Finite Volume framework, providing high-resolution streamline plots and vorticity contours. A rectangular obstacle with a fixed width (&lt;em&gt;W&lt;/em&gt; = 0.2&lt;em&gt;L&lt;/em&gt;) and varying heights (&lt;em&gt;H&lt;/em&gt; = 0.20&lt;em&gt;L&lt;/em&gt;,0.25&lt;em&gt;L&lt;/em&gt;,0.50&lt;em&gt;L&lt;/em&gt;,0.60&lt;em&gt;L&lt;/em&gt;,0.80&lt;em&gt;L&lt;/em&gt; and 0.95&lt;em&gt;L&lt;/em&gt;) is systematically placed in three configurations: 1) bottom left-corner, 2) bottom right-corner and 3) both bottom (left–right) corners. The study investigates the influence of obstacle placement and height on kinetic energy (&lt;em&gt;KE&lt;/em&gt;), enstrophy (&lt;em&gt;Z&lt;/em&gt;), and palinstrophy (&lt;em&gt;P&lt;/em&gt;) as well as obstacles focusing on the modulation of primary (PV) and secondary (SV) vortices, energy metrics, and flow topology in lid-driven cavity (LDC) flows, focusing on configurations with single and double corner. Fluid motion control in constrained environments, such as industrial mixing where vortex dynamics in lid-driven cavities optimize mixing and reduce dead zones by adjusting obstacle configurations and heat transfer, demands a detailed understanding of energy dissipation and rotational dynamics. The physics involved in &lt;em&gt;KE&lt;/em&gt; and vortex dynamics is that increasing obstacle height progressively reduces the kinetic energy across all configurations, with the sharpest decline (38 %) observed in dual-corner obstacles due to amplified flow constriction and enhanced boundary layer effects. Single-corner obstacles disrupt the flow asymmetrically, whereas dual-corner setups create balanced but more confined vortex structures, impacting energy distribution and flow control. In rotational energy (&lt;em&gt;Z&lt;/em&gt;) and gradient intensities (&lt;em&gt;P&lt;/em&gt;), dual-corner obstacles induce the highest rotational energy (192 % increase in &lt;em&gt;Z&lt;/em&gt;) and vorticity gradients (127 % increase in &lt;em&gt;P&lt;/em&gt;), revealing the interplay of sharp edges, shear layers, and enhanced vortex interactions. These features emphasize the potential for intensified mixing but also highlight the risks of energy dissipation in constrained environments. In flow structure transformations, obstacle-induced changes in streamline topology reveal critical transitions in vortex formation and interaction. In dual-corner configurations, secondary vortices coalesce into a single dominant structure at critical heights say at &lt;em&gt;H&lt;/em&gt; = 0.50&lt;em&gt;L&lt;/em&gt;, leading to a dramatic 1366.92 % increase in vortex area. However, excessive heights (&lt;em&gt;H&lt;/em&gt; = 0.95&lt;em&gt;L&lt;/em&gt;) suppress these vortices, creating stable but inefficiently mixed flow regimes. In addition, we discovered a new empirical relation amon","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"68 ","pages":"Article 108086"},"PeriodicalIF":4.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Chain-type multi-mode polarization-sensitive metamaterial absorber in infrared band","authors":"Xinyu Wang,&nbsp;Zhongzhu Liang,&nbsp;Fuming Yang,&nbsp;Xiaoyan Shi,&nbsp;Jinhuan Li,&nbsp;Yongjun Dong,&nbsp;Weizhen Liu,&nbsp;Yan Jia,&nbsp;Wenwen Sun,&nbsp;Zhe Wu,&nbsp;Xiangtao Chen,&nbsp;Siyu Guo","doi":"10.1016/j.rinp.2024.108105","DOIUrl":"10.1016/j.rinp.2024.108105","url":null,"abstract":"<div><div>Polarized light, abundant in material information, necessitates perfect broadband absorption by metamaterial absorbers across extensive angular ranges for applications in electromagnetic stealth and polarization filtering. Despite the challenges in achieving broadband polarization-sensitive absorption in both the mid-infrared and long-wave infrared spectrums, this paper introduces a novel multi-mode polarization-sensitive infrared metamaterial absorber designed with a chain-type structure. The geometrical parameters of this absorber have been meticulously optimized through parameter tuning and other strategies to maximize absorption efficiency. Notably, the absorber reaches an average absorption of 90.37% for TE polarization in the mid-wave infrared band and 96.68% for TM polarization in the long-wave infrared band. Additionally, it demonstrates a remarkable 95.2% absorption stability across incidence angles from 0 to 60 degrees, showcasing effective polarization performance and a wide response wavelength. This absorber is ideal for use in polarization detection devices, infrared filters, and similar applications.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"68 ","pages":"Article 108105"},"PeriodicalIF":4.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Self-aberration in high-brightness uniformly charged particle beams","authors":"Vitaliy Goryashko ,&nbsp;Anatoliy Opanasenko ,&nbsp;Kazuaki Togawa","doi":"10.1016/j.rinp.2024.108096","DOIUrl":"10.1016/j.rinp.2024.108096","url":null,"abstract":"<div><div>We show theoretically and experimentally a slice emittance growth in a uniformly charged electron beam in static, and linear in space, electromagnetic fields of the SACLA injector. The Coulomb field of the electrons in a beam creates a linear correlation between the electrons in the transverse phase space. The magnetic field of a solenoid lens first transfers this ‘transverse correlation’ into a ‘longitudinal one,‘ and then back to the transverse plane in an amplified fashion. As a result, the particle momentum exchange between the longitudinal and transverse degrees of freedom in the magnetic field leads to a nonlinear deformation of the transverse phase space of the beam.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"68 ","pages":"Article 108096"},"PeriodicalIF":4.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"International Advisory Board","authors":"","doi":"10.1016/S2211-3797(25)00010-5","DOIUrl":"10.1016/S2211-3797(25)00010-5","url":null,"abstract":"","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"68 ","pages":"Article 108116"},"PeriodicalIF":4.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Microwave spectroscopy assisted by electromagnetically induced transparency near natural Förster resonance on Rubidium","authors":"Naomy Duarte Gomes ,&nbsp;Daniel Varela Magalhães ,&nbsp;J.D. Massayuki Kondo ,&nbsp;Luis Gustavo Marcassa","doi":"10.1016/j.rinp.2024.108081","DOIUrl":"10.1016/j.rinp.2024.108081","url":null,"abstract":"<div><div>In this work, we precisely measure the transition energies between the Rydberg state n<span><math><msub><mrow><mtext>D</mtext></mrow><mrow><mn>5</mn><mo>/</mo><mn>2</mn></mrow></msub></math></span> to the nearby Rydberg states <span><math><mrow><mrow><mo>(</mo><mtext>n</mtext><mo>+</mo><mn>2</mn><mo>)</mo></mrow><msub><mrow><mtext>P</mtext></mrow><mrow><mn>3</mn><mo>/</mo><mn>2</mn></mrow></msub></mrow></math></span>, <span><math><mrow><mrow><mo>(</mo><mtext>n</mtext><mo>−</mo><mn>2</mn><mo>)</mo></mrow><msub><mrow><mtext>F</mtext></mrow><mrow><mn>7</mn><mo>/</mo><mn>2</mn></mrow></msub></mrow></math></span> in <span><math><mrow><msup><mrow></mrow><mrow><mn>85</mn></mrow></msup><mtext>Rb</mtext></mrow></math></span> for the range <span><math><mrow><mn>41</mn><mo>≤</mo><mtext>n</mtext><mo>≤</mo><mn>46</mn></mrow></math></span>. This was done by carrying out microwave spectroscopy via electromagnetically induced transparency (EIT) in a room temperature vapor reference cell of rubidium, which is similar to the experimental approach followed by Li et al., (2021). This range is interesting because there is a quasi Förster resonance between the atomic pair <span><math><mrow><mn>43</mn><msub><mrow><mtext>D</mtext></mrow><mrow><mn>5</mn><mo>/</mo><mn>2</mn></mrow></msub><mo>+</mo><mn>43</mn><msub><mrow><mtext>D</mtext></mrow><mrow><mn>5</mn><mo>/</mo><mn>2</mn></mrow></msub></mrow></math></span> and <span><math><mrow><mn>45</mn><msub><mrow><mtext>P</mtext></mrow><mrow><mn>3</mn><mo>/</mo><mn>2</mn></mrow></msub><mo>+</mo><mn>41</mn><msub><mrow><mtext>F</mtext></mrow><mrow><mn>7</mn><mo>/</mo><mn>2</mn></mrow></msub></mrow></math></span>. We compared the obtained results with numerically calculated transition energies based on previously tabulated quantum defect numbers by various research groups using both hot and ultra-cold atomic samples. Our data are more consistent with measurements made within ultra-cold atomic systems (Li et al., 2003; Han et al., 2006).</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"68 ","pages":"Article 108081"},"PeriodicalIF":4.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Electronic and optical properties of group V one-dimensional materials with a square columnar structure: A first-principles investigation","authors":"Pinbo Huang ,&nbsp;Zhiang Liu ,&nbsp;Ping Huang ,&nbsp;Yi Luo","doi":"10.1016/j.rinp.2024.108098","DOIUrl":"10.1016/j.rinp.2024.108098","url":null,"abstract":"<div><div>In this paper, we propose a series of novel one-dimensional group V semiconductors with a square columnar structure, denoted as SC-As, SC-Sb, and SC-Bi, derived from SC-P. Phonon dispersion calculations reveal their dynamic stability, while first-principles calculations show versatilities in their electronic and optical properties influenced by spin–orbit coupling. SC-P, SC-As, and SC-Sb exhibit strong sunlight absorption with intensities exceeding 3 × 10⁵ cm⁻¹, while SC-Bi demonstrates exceptional absorption spanning the entire solar flux spectrum. Furthermore, band alignment denotes that the SC-P is suitable for photocatalytic water splitting in both acidic and alkaline environments, while SC-As and SC-Sb work in alkaline conditions. These findings unveil the potential of these materials in solar energy harvesting and photocatalytic hydrogen production, advancing the development of group V 1D semiconductors.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"68 ","pages":"Article 108098"},"PeriodicalIF":4.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Simulation study on the optimal shape of electrodes quadrupole electrostatic deflectors for the UTEM","authors":"He Chen ,&nbsp;Zhongwen Li ,&nbsp;Jun Li ,&nbsp;Huanfang Tian ,&nbsp;Huaixin Yang ,&nbsp;Jianqi Li","doi":"10.1016/j.rinp.2024.108099","DOIUrl":"10.1016/j.rinp.2024.108099","url":null,"abstract":"<div><div>In this paper, the electrostatic field of a quadrupole electrostatic deflector used in ultrafast transmission electron microscopy is simulated. When the electrodes of the deflector are arcs and straight plates with different degrees of curvature, there is a significant difference in the distribution of the electric field at the center. The electric field distribution results of different initial electrode models were obtained by simulation, and the ‘standard deviation of electric field strength’ was defined to assess the uniformity of the central electric field distribution. The optimal arc electrode model can be obtained by fitting the cross-sectional electric field parameters obtained from the simulation. By further simulating and calculating the particle beam trajectory of the optimized model of the quadrupole electrostatic deflector electrode, it can be verified that the image quality of the optimal model is the most ideal. Then, this paper presents the optimal circular arc electrode structure parameters for a series of installation apertures, providing a reference for electrode design in relevant instruments.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"68 ","pages":"Article 108099"},"PeriodicalIF":4.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Specific detection of tartaric acid chiral isomers based on centrosymmetric terahertz metamaterial sensors","authors":"Xujun Xu,&nbsp;Zhen Sun,&nbsp;Guocui Liu,&nbsp;Jianjun Liu,&nbsp;Yong Du","doi":"10.1016/j.rinp.2024.108090","DOIUrl":"10.1016/j.rinp.2024.108090","url":null,"abstract":"<div><div>Tartaric acid (C₄H₆O₆) is a common food additive with two mutually symmetrical chiral carbons, which is a very important class of four-carbon organic chiral sources. L-, D-, DL-tartaric acids have different uses in food additives and pharmaceutical fields. Traditional detection methods, such as fluorescence detection, have problems such as destructive and non-specific characters. Thus, the development of a simple, accurate, and rapid detection technique for tartaric acid chiral isomers (TACIs) is imminent. In this work, we designed a terahertz metamaterial sensor with central symmetry for detecting TACIs. Centrosymmetric metamaterial sensors based on aluminum and polyimide were simulated using computer simulation technology (CST) electromagnetic software. This metamaterial is composed of a trapezoidal structure with a hole and its rotation of 180 degrees, with three resonance peaks. The sensing properties of terahertz metamaterials and the slow light effect are further discussed. The minimum detection concentrations of D-tartaric acid and L-tartaric acid measured in the experiment were 0.002 g/ml and 0.001 g/ml respectively. In addition, theoretical simulations of the crystalline cells of TACIs were also calculated using the density functional theory. The terahertz absorption peak of the TACIs simulation results was obtained, and the data obtained by comparison with experimental measurements were basically the same. Experimental results indicate that the metamaterial designed in this article can distinguish small differences TACIs.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"68 ","pages":"Article 108090"},"PeriodicalIF":4.4,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143104985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}