Results in Physics最新文献_第8页

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2026-01-01 Epub Date: 2026-01-20 DOI: 10.1016/S2211-3797(26)00007-0

引用次数: 0

Secondary electron emission calculation based on correcting electron scattering models achieved by Monte Carlo simulation in Geant4 基于Geant4中蒙特卡罗模拟获得的校正电子散射模型的二次电子发射计算

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2026-01-01 Epub Date: 2025-12-05 DOI: 10.1016/j.rinp.2025.108548

Dan Wang , Kaiwen Yao , Zhuoxi Lian , Guohe Zhang , Yang Li , Junlin Li , Ruibin Li

{"title":"Secondary electron emission calculation based on correcting electron scattering models achieved by Monte Carlo simulation in Geant4","authors":"Dan Wang , Kaiwen Yao , Zhuoxi Lian , Guohe Zhang , Yang Li , Junlin Li , Ruibin Li","doi":"10.1016/j.rinp.2025.108548","DOIUrl":"10.1016/j.rinp.2025.108548","url":null,"abstract":"<div><div>Secondary electron emission (SEE) is a crucial phenomenon in field of materials science, with significant applications in electron microscopes and electron multipliers. In this research, by utilizing a combination of standard electromagnetic physics models and customized parameters, the Geant4 framework is employed to model the SEE process, which achieves the Monte Carlo simulation of SEE yield (SEY) across various materials and surface conditions. The main processes of the modelling includes inelastic scattering, elastic scattering, and interfacial transmission, are tailored to improve the accuracy of SEE simulations. The study evaluates the impact of different parameters such as cut-off energy (<em>E</em><sub>c</sub>) and surface barrier energy loss (<em>E</em><sub>L</sub>) on the simulation results. With appropriate parameters, the simulation results for MgO agree well with experimental data. By normalizing the simulation results and experimental data, the two can be better matched. In the low energy of primary electrons (<em>E</em><sub>p</sub>) range of 0 < <em>E</em><sub>p</sub>/<em>E</em><sub>m</sub> < 1.5, the calculated results are consistent with the experimental results with a difference less than 0.2. Additionally, the simulations are further applied to 7 materials (Al, Si, C, MgO, Al<sub>2</sub>O<sub>3</sub>, SiO<sub>2</sub>, TiN) and 3 surface conditions (incident angle, nanofilm coatings and microstructures) as application examples. The average difference between calculated maximum SEY and measured maximal SEY is less than 10 %. This Monte Carlo model is an extensible platform for SEY calculation and can provide help in the application of SEY prediction and modulation in electronic devices involving the SEE process.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"80 ","pages":"Article 108548"},"PeriodicalIF":4.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145737054","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}

引用次数: 0

Tunable dual-phase TMOKE sensor in a Weyl semimetal–plasmonic waveguide Weyl半金属等离子波导中可调谐双相TMOKE传感器

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2026-01-01 Epub Date: 2025-12-24 DOI: 10.1016/j.rinp.2025.108571

Bita Roumi , Vahid Fallahi

{"title":"Tunable dual-phase TMOKE sensor in a Weyl semimetal–plasmonic waveguide","authors":"Bita Roumi , Vahid Fallahi","doi":"10.1016/j.rinp.2025.108571","DOIUrl":"10.1016/j.rinp.2025.108571","url":null,"abstract":"<div><div>We propose a dual-phase optical sensor utilizing the transverse magneto-optical Kerr effect (TMOKE) in a Weyl semimetal (WSM)-plasmonic waveguide structure. The design enables high-performance refractive index sensing in both gaseous and aqueous environments without structural reconfiguration. Numerical simulations yield sensitivities of 500 nm/<span><math><mrow><mi>R</mi><mi>I</mi><mi>U</mi></mrow></math></span> (gas) and 1000 nm/<span><math><mrow><mi>R</mi><mi>I</mi><mi>U</mi></mrow></math></span> (aqueous), with figures of merit (FOM) of 714 <span><math><mrow><msup><mrow><mi>R</mi><mi>I</mi><mi>U</mi></mrow><mrow><mo>-</mo><mn>1</mn></mrow></msup></mrow></math></span> and 1429 <span><math><mrow><msup><mrow><mi>R</mi><mi>I</mi><mi>U</mi></mrow><mrow><mo>-</mo><mn>1</mn></mrow></msup></mrow></math></span>, respectively. This performance is among the highest reported for dual-phase sensors. A key innovation of this sensor lies in its active tunability via the Fermi energy of the WSM, exploiting its topological properties to adapt to varying refractive indices dynamically. This work introduces a versatile platform for contactless optical sensing, with applications in biomedical diagnostics.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"80 ","pages":"Article 108571"},"PeriodicalIF":4.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145924865","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}

引用次数: 0

Multiscale approach to investigate the effects of proton-induced defects in silicon lattice structures 多尺度方法研究硅晶格结构中质子诱导缺陷的影响

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2026-01-01 Epub Date: 2025-12-29 DOI: 10.1016/j.rinp.2025.108573

S. Shoorian, H. Jafari, S.A.H. Feghhi

{"title":"Multiscale approach to investigate the effects of proton-induced defects in silicon lattice structures","authors":"S. Shoorian, H. Jafari, S.A.H. Feghhi","doi":"10.1016/j.rinp.2025.108573","DOIUrl":"10.1016/j.rinp.2025.108573","url":null,"abstract":"<div><div>Understanding and predicting radiation-induced damage in silicon-based detectors is essential for their reliable operation in harsh environments such as space, nuclear reactors, and high-energy physics experiments. In this study, a comprehensive multiscale computational framework was developed to investigate proton-induced displacement damage and its impact on the electrical behavior of silicon detectors. Molecular dynamics (MD) simulations were performed over a 50–2000 eV PKA energy range, fully covering and exceeding the maximum recoil energies for 1–50 MeV proton irradiation, typical of low-energy accelerator facilities, to characterize the generation and evolution of point and cluster defects in the silicon lattice. While TCAD device-level modeling quantified the resultant changes in leakage current. Experimental validation was conducted using proton-irradiated conventional silicon photodiodes, with leakage current measurements normalized to particle flux for direct comparison. The modeled leakage currents showed excellent agreement with the experimental measurements, with minor deviations attributed to interface-related degradation mechanisms not captured in bulk defect simulations. A semi-empirical model was further established by fitting a surface to the simulated leakage current as a function of reverse voltage and PKA energy, achieving a high coefficient of determination. This model provides a predictive relationship between atomic-level damage and macroscopic electrical response, offering a robust foundation for the design and optimization of radiation-tolerant silicon detectors.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"80 ","pages":"Article 108573"},"PeriodicalIF":4.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145924872","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}

引用次数: 0

Near-infrared biosensors based on optical Tamm plasmons in one-dimensional photonic crystal heterostructre containing Weyl semimetals 基于含Weyl半金属一维光子晶体异质结构光学Tamm等离子体的近红外生物传感器

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2026-01-01 Epub Date: 2025-12-08 DOI: 10.1016/j.rinp.2025.108551

Ban Khalid Mohammed , Babak Abdollahipour , Somayeh Oskoui Abdol

{"title":"Near-infrared biosensors based on optical Tamm plasmons in one-dimensional photonic crystal heterostructre containing Weyl semimetals","authors":"Ban Khalid Mohammed , Babak Abdollahipour , Somayeh Oskoui Abdol","doi":"10.1016/j.rinp.2025.108551","DOIUrl":"10.1016/j.rinp.2025.108551","url":null,"abstract":"<div><div>Weyl semimetals exhibit exceptional electronic and optical properties, positioning them as promising candidates for a wide range of applications. Notably, these materials naturally support surface waves in the infrared frequency range. In this study, we propose an optical biosensor operating in the near-infrared region, based on a combination of a one-dimensional photonic crystal and multiple layers of Weyl semimetal separated by a dielectric material. We evaluate the sensor’s performance using two diagnostic approaches: angle interrogation and wavelength interrogation techniques. Our results show that under angle interrogation, a biosensor comprising a single layer of Weyl semimetal achieves a notably high sensitivity of 160°/RIU and a figure of merit of 2486.48 RIU<sup>−1</sup>. Alternatively, when using the wavelength interrogation method, the biosensor with a single layer of Weyl semimetal delivers superior sensing performance, reaching a maximum sensitivity of 1050 nm/RIU and a figure of merit of 1035.14 RIU<sup>−1</sup>. These results highlight the potential of Weyl semimetal-based structures for high-performance biosensing in the near-infrared spectrum.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"80 ","pages":"Article 108551"},"PeriodicalIF":4.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145787122","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}

引用次数: 0

Third-order response and improving the photovoltaic efficiency of the copolymer P3HT:PCBM doped with iodine as a solar cell 掺碘共聚物P3HT:PCBM作为太阳能电池的三阶响应和提高光伏效率

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2025-12-01 Epub Date: 2025-11-23 DOI: 10.1016/j.rinp.2025.108537

Abbas A. Sweaf , Harith A. Hasan , Hassan K. Ibrahim , Hussain A. Badran , Riyadh Ch. Abul-Hail , Khalid I. Ajeel

{"title":"Third-order response and improving the photovoltaic efficiency of the copolymer P3HT:PCBM doped with iodine as a solar cell","authors":"Abbas A. Sweaf , Harith A. Hasan , Hassan K. Ibrahim , Hussain A. Badran , Riyadh Ch. Abul-Hail , Khalid I. Ajeel","doi":"10.1016/j.rinp.2025.108537","DOIUrl":"10.1016/j.rinp.2025.108537","url":null,"abstract":"<div><div>Z-scan method using a 532 nm laser wavelength was employed to determine the nonlinear refractive index (NORX) of an iodine polymer film. This technique involved a closed aperture that allowed part of the laser beam to pass through and reach the sensitive membrane of the detector. According to the measurements, NORX indicates that the iodine-doped PMMA film exhibits a negative nonlinearity, with <span><math><mrow><msub><mi>n</mi><mn>2</mn></msub><mo>=</mo><mo>-</mo><mn>339.14</mn><mo>×</mo><msup><mn>10</mn><mrow><mo>-</mo><mn>6</mn></mrow></msup><mrow><mrow><mi>c</mi><msup><mi>m</mi><mn>2</mn></msup></mrow><mo>/</mo><mi>W</mi></mrow></mrow></math></span>. Furthermore, the value of the enhancement factor greater than one (<span><math><mrow><msub><mi>W</mi><mrow><mi>merit</mi></mrow></msub></mrow></math></span>>1) and a thermo-optic coefficient of 10<sup>−5</sup>, making it a promising material for numerous industrial applications. The effects of the iodine dye on preserving the full brightness of the polymer film over an extended period were also investigated. Beside that a mathematical model was studied using experimental values and found that the color matching functions of the iodine-doped PVP/PMMA films remained stable. A layer of pure P3HT:PCBM was prepared and then doped with different iodine concentrations (0.9 and 1.5 mM). Adding iodine to the P3HT:PCBM layer at a concentration of 1.5 mM increased the dark current by 3 times. The conductance-frequency (G-F) and capacitance-frequency (C-F) measurements were performed in the range of 0 Hz–100 MHz, and then the interface state number due to depletion was determined. The power conversion efficiency (PCE) to be in the range (1.066–1.383).This study demonstrated that the iodine-doped polymer film is a promising material for optoelectronics application such as polymer-dispersed liquid crystals, electrophoretic displays, and X-ray sensors.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"79 ","pages":"Article 108537"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621554","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}

引用次数: 0

Dual-band circularly polarized dielectric resonator antenna with wide impedance bandwidth and machine learning-assisted performance prediction 具有宽阻抗带宽和机器学习辅助性能预测的双频圆极化介质谐振器天线

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2025-12-01 Epub Date: 2025-11-19 DOI: 10.1016/j.rinp.2025.108531

Utkarsh Srivastava, Shreevatsa Gupta, Prerna Kumari, Upender Patri

{"title":"Dual-band circularly polarized dielectric resonator antenna with wide impedance bandwidth and machine learning-assisted performance prediction","authors":"Utkarsh Srivastava, Shreevatsa Gupta, Prerna Kumari, Upender Patri","doi":"10.1016/j.rinp.2025.108531","DOIUrl":"10.1016/j.rinp.2025.108531","url":null,"abstract":"<div><div>This paper presents a compact dual-band dielectric resonator antenna (DRA) with circular polarization reconfigurability, optimized for UAV platforms, satellite communications, and emerging 6G networks. An elliptical ground slot enhances impedance bandwidth, while an asymmetric feeding structure excites orthogonal modes for robust circular polarization. The design achieves 111.1 % impedance bandwidth, dual axial ratio bandwidths of 60.4 % and 17.4 %, a peak gain of 12.8 dBic, and 95.07 % radiation efficiency. Alongside full-wave simulations, machine learning (ML) models—Artificial Neural Networks (ANN), XGBoost, and Random Forest—are employed to predict S11 and AR across 3–15 GHz. The models attain high accuracy (R2 > 0.93 for S11, R2 > 0.96 for AR) with low error values, validating their ability to capture complex electromagnetic behavior. This hybrid design and ML-assisted approach accelerate optimization, reduce simulation time, and provide reliable predictive capability. The proposed DRA’s combination of wideband performance, polarization agility, and ML integration makes it a strong candidate for compact, high-performance communication systems in UAVs, satellites, and next-generation wireless infrastructure.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"79 ","pages":"Article 108531"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621555","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}

引用次数: 0

International Advisory Board 国际咨询委员会

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2025-12-01 Epub Date: 2025-12-04 DOI: 10.1016/S2211-3797(25)00436-X

引用次数: 0

Water desalination and highly efficient solar evaporation using the ferrite SnFe2O4/PVA: GA: AC hydrogel nanocomposite: Physical and photo-chemical properties 铁氧体SnFe2O4/PVA: GA: AC水凝胶纳米复合材料的海水淡化和高效太阳能蒸发：物理和光化学性质

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2025-12-01 Epub Date: 2025-11-26 DOI: 10.1016/j.rinp.2025.108539

M. Fargharazi, G. Sedaghati Jamal Abad, M.M. Bagheri Mohagheghi

{"title":"Water desalination and highly efficient solar evaporation using the ferrite SnFe2O4/PVA: GA: AC hydrogel nanocomposite: Physical and photo-chemical properties","authors":"M. Fargharazi, G. Sedaghati Jamal Abad, M.M. Bagheri Mohagheghi","doi":"10.1016/j.rinp.2025.108539","DOIUrl":"10.1016/j.rinp.2025.108539","url":null,"abstract":"<div><div>This study designs a novel tin ferrite (SnFe<sub>2</sub>O<sub>4</sub>)/PVA: GA: activated carbon (AC) hydrogel evaporator material for solar water desalination. This approach addresses challenges in traditional seawater desalination, such as increasing the evaporation efficiency, the detrimental influence of condensed water droplets and water vapor on light absorption, and the difficulties in efficiently obtaining clean water. The PVA: GA: SnFe<sub>2</sub>O<sub>4</sub>/AC nanocomposite hydrogel was synthesized by dispersing SnFe<sub>2</sub>O<sub>4</sub> nanoparticles and activated carbon (AC) in polyvinyl alcohol (PVA) and cross-linking it with glutaraldehyde (GA). The structural, optical, and morphological properties of the synthesized nanocomposite hydrogel were characterized using X-ray diffraction (XRD), UV–Vis spectroscopy, Fourier-transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy (FESEM). Fresh water preparation and solar evaporation experiments were performed in the presence a simulated the sunlight by an IR lamp (250 W, 2300 K), with intensity 2094 LUX. The synergistic photothermal and microporous properties of the nanocomposite hydrogel enabled an impressive evaporation rate of 3.85 kgm<sup>−2</sup>h<sup>−1</sup>. Total dissolved solids (TDS) and inductively coupled plasma (ICP) analyses confirmed excellent salt resistance. Furthermore, distillation of Caspian seawaters significantly reduced the concentration of K<sup>+</sup>, Mg<sup>2+</sup> Na<sup>+</sup>, and Hg<sup>2+</sup> ions. Water hardness decreased from 6648 ppm to 213 ppm, and conductivity was reduced from 8651 µS/cm to 453 µS/cm, both complying with World Health Organization (WHO) standards. This work offers a promising avenue for further research to enhance the availability of drinking water in urban and rural communities through solar evaporation technology.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"79 ","pages":"Article 108539"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621553","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}

引用次数: 0

Bayesian regularization neural network analysis of heat and mass transfer in hybrid nanofluid flow over a lubricated stretching sheet with power-law lubricant layer and magnetic field effects 具有幂律润滑层和磁场效应的混合纳米流体流动传热传质的贝叶斯正则化神经网络分析

IF 4.6 2区物理与天体物理

Results in Physics Pub Date : 2025-12-01 Epub Date: 2025-11-20 DOI: 10.1016/j.rinp.2025.108530

Taseer Muhammad , Tasawar Abbas , Zeeshan Ali , Ahmed M. Zidan , Faisal Nazir

{"title":"Bayesian regularization neural network analysis of heat and mass transfer in hybrid nanofluid flow over a lubricated stretching sheet with power-law lubricant layer and magnetic field effects","authors":"Taseer Muhammad , Tasawar Abbas , Zeeshan Ali , Ahmed M. Zidan , Faisal Nazir","doi":"10.1016/j.rinp.2025.108530","DOIUrl":"10.1016/j.rinp.2025.108530","url":null,"abstract":"<div><div>Hybrid nanofluids have lately received extensive interest due to its excellent lubrication and heat transfer properties in engineering. In this paper, a Bayesian Regularization Neural Network (BRNN) analysis of the thermal and material transport in the hybrid nanofluid flow through a lubricated stretchable surface with a power-law lubricant layer under the impacts of a magnetic field is conducted. The study will be motivated on the joint role of magnetic field magnitude, power-law rheological behavior, nanoparticle concentration, Brownian motion, thermophoresis, and temperature-dependent thermal conductivity on the velocity, temperature, and concentration patterns in the flow. Governing equations that describe the continuity of mass, momentum, energy, and concentration, and interfacial shear stress continuity, as well as slip/no-slip boundary conditions, are used to indicate realistic physical behavior. The BRNN approach to solving the nonlinear coupled equations gives stable and accurate solutions with a high level of generalization and is checked against the Legendre Wavelet-Based Spectral Collection Method (LW-SCM). The computed outcomes imply that power-law lubricant and magnetic induction can be applied readily to increase the thermal energy transfer and decrease flow resistance, and the inclusion of nanoparticles can increase thermal transmission rate and save energy. This study’s results have shown that neural network-based methods can be used to model complex hybrid nanofluid systems and bear practical implications in micro-lubrication and thermal management, and energy conversion technologies.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"79 ","pages":"Article 108530"},"PeriodicalIF":4.6,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621558","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}

引用次数: 0