Results in Physics最新文献_第2页

High-sensitivity and flexible H2S gas sensor based on PVA/PEO–CoO/MoO3 nanocomposite films 基于PVA/ PEO-CoO /MoO3纳米复合膜的高灵敏度柔性H2S气体传感器

IF 4.6 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Results in Physics

Pub Date : 2026-01-11 DOI: 10.1016/j.rinp.2026.108583

Maha Aiiad Alenizi , Maamon A. Farea , Doaa Abdelhameed , A.Al ojeery , S.A. Al-Balawi , Al-Hakimi A. N , Tahani M. Alresheedi , M.A. Ahlam

A novel PVA/PEO–CoO/MoO₃ nanocomposite was successfully fabricated and evaluated as a high-performance chemiresistive gas sensor for H₂S detection at room temperature. Structural and morphological analyses confirmed the successful incorporation of uniformly dispersed CoO and MoO₃ nanoparticles into the polymer matrix, while electrical characterization demonstrated enhanced conductivity with increasing oxide content. Among the compositions tested, the film with 15 wt% metal oxide loading (Sample S4) showed optimal sensing performance, delivering a high response of ∼ 98.9 % to 50 ppm H₂S, with fast and reversible dynamics and minimal signal drift. The sensor also exhibited excellent selectivity toward H₂S over other interfering gases and maintained stable performance over repeated cycles and 30 days of storage. Compared with similar systems in the literature, the proposed sensor outperforms in terms of sensitivity, selectivity, and room-temperature functionality, without requiring external heating or complex fabrication methods. These findings highlight the potential of oxide–polymer hybrid systems for the development of low-cost, flexible, and scalable gas sensors for real-world applications.

成功制备了一种新型PVA/ PEO-CoO /MoO3纳米复合材料，并对其作为室温下检测H2S的高性能化学阻性气体传感器进行了评价。结构和形态分析证实了均匀分散的CoO和MoO3纳米颗粒成功地加入到聚合物基体中，而电学表征表明，随着氧化物含量的增加，电导率增强。在所测试的成分中，金属氧化物负载为15 wt%（样品S4）的薄膜表现出最佳的传感性能，对50 ppm H2S的响应高达~ 98.9%，具有快速可逆的动力学和最小的信号漂移。与其他干扰气体相比，该传感器对H2S也表现出优异的选择性，并在重复循环和30天的存储中保持稳定的性能。与文献中类似的系统相比，所提出的传感器在灵敏度、选择性和室温功能方面表现优异，不需要外部加热或复杂的制造方法。这些发现凸显了氧化物-聚合物混合系统在开发低成本、灵活、可扩展的气体传感器方面的潜力。

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引用次数: 0

Atomistic tight-binding computations in electronic structures and optical signatures of wurtzite structured InAs and InP nanocrystals 纤锌矿结构InAs和InP纳米晶体的电子结构和光学特征的原子紧密结合计算

IF 4.6 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Results in Physics

Pub Date : 2026-01-11 DOI: 10.1016/j.rinp.2026.108585

Pruet Kalasuwan , Worasak Sukkabot

III-V nanocrystals with wurtzite phase demonstrate the unique anisotropic nature for the light extraction applications in optoelectronic devices; this is analyzed by the atomistic tight-binding theory. The electronic and optical signatures of wurtzite structured InAs and InP nanocrystals are determined and compared with experimental data. The physical characteristics are sensitive with nanocrystal materials and sizes. Credited by the quantum confinement, the size-dependent optical band gaps are quantitatively demonstrated. The optical spectra ranging from ultraviolet to infrared wave length are extensively tuned by changing the nanocrystal materials and diameters. The optical band gaps of the tight-binding model agree well with the experimental work. The optical signatures of InP nanocrystals are better than those of InAs nanocrystals. The electron-hole pairs are easily generated with the growing diameters. The stokes shifts are initially reduced and then are supposed to be unchanged by the growing diameters.

具有纤锌矿相的III-V型纳米晶体具有独特的各向异性，可用于光电器件的光提取；这是用原子紧密结合理论来分析的。测定了纤锌矿结构的InAs和InP纳米晶体的电子和光学特征，并与实验数据进行了比较。物理特性对纳米晶材料和尺寸敏感。由于量子约束，大小相关的光学带隙被定量地证明。通过改变纳米晶体的材料和直径，可以广泛地调谐紫外至红外波段的光谱。紧结合模型的光学带隙与实验结果吻合较好。InP纳米晶体的光学特征优于InAs纳米晶体。随着直径的增大，电子-空穴对很容易产生。stokes位移最初减小，然后假定随着直径的增长而保持不变。

引用次数: 0

High harmonic generation and wave mixing in graphene quantum dots by bichromatic laser fields of circular polarization 圆偏振双色激光场在石墨烯量子点中的高谐波产生和波混频

IF 4.6 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Results in Physics

Pub Date : 2026-01-05 DOI: 10.1016/j.rinp.2026.108579

H.K. Avetissian, A.G. Ghazaryan, G.F. Mkrtchian, Kh.V. Sedrakian

We investigate high-order harmonic generation and wave mixing in graphene quantum dots of various shapes and symmetries driven by intense bichromatic laser fields with circular polarization. The efficiency of these nonlinear optical processes is shown to be highly sensitive to the quantum dot symmetry, as well as to the relative phase, frequency ratio, and amplitude of the two commensurate laser components. Under specific conditions, the superposition of two circularly polarized fields forms symmetric Lissajous figures in the dipole approximation, effectively acting as a homogeneous electric undulator. When the symmetry of the driving field matches that of the graphene quantum dot, harmonic and wave mixing yields are significantly enhanced. Using a microscopic quantum kinetic approach based on numerical solutions of the density matrix equations, we demonstrate strong nonlinear responses in triangular and hexagonal zigzag-edge graphene quantum dots irradiated by bichromatic counter-rotating circularly polarized pulses.

研究了在圆偏振强双色激光场驱动下不同形状和对称的石墨烯量子点的高次谐波产生和波混频。这些非线性光学过程的效率对量子点对称性以及两个相称的激光元件的相对相位、频率比和振幅高度敏感。在特定条件下，两个圆极化场的叠加在偶极近似下形成对称的利萨焦图，有效地充当均匀电波动器。当驱动场的对称性与石墨烯量子点的对称性相匹配时，谐波和波混频产率显著提高。利用基于密度矩阵方程数值解的微观量子动力学方法，我们证明了在双色反旋转圆极化脉冲照射下三角形和六边形之字形边缘石墨烯量子点的强非线性响应。

引用次数: 0

Hydrogen-passivated AlGaN/GaN HEMTs: fabrication and electrical characterization under-proton irradiation 氢钝化AlGaN/GaN hemt：质子辐照下的制备和电学表征

IF 4.6 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Results in Physics

Pub Date : 2026-01-04 DOI: 10.1016/j.rinp.2026.108577

Gang San Yun , Jin Park , Won Suk Koh , Soo Bean Song , Kyeong Min Lim , Sang Ho Lee , Young Jun Yoon , In Man Kang

This study quantitatively examines the effect of hydrogen passivation on the electrical degradation of AlGaN/GaN high electron mobility transistors (HEMTs) subjected to proton irradiation. Proton exposure was conducted at an energy of 15 MeV with a fluence of 5 × 10¹³ cm⁻², and device characteristics were compared before and after irradiation. Prior to irradiation, performance differences between passivated and unpassivated devices were within 5 %. Following irradiation, unpassivated devices exhibited a 28.4 % reduction in on-current, a greater than 20 % decrease in transconductance (g_m), and a 28 % increase in contact resistance (R_c). In contrast, hydrogen-passivated devices demonstrated stable operation, with less than 5 % degradation in on-current, a 3 % variation in g_m, and only a 4 % change in R_c. These improvements are attributed to hydrogen atoms neutralizing radiation-induced defects, including donor-like and acceptor-like traps, which otherwise reduce electron mobility and increase contact resistance. By suppressing trap activation and mitigating potential fluctuations and Fermi-level pinning at the AlGaN/GaN interface, hydrogen passivation stabilizes the two-dimensional electron gas (2DEG) density and carrier transport, preserving current conduction and interfacial reliability post-irradiation. Therefore, hydrogen passivation is identified as a critical radiation-hardening strategy that effectively mitigates current degradation and contact instability in AlGaN/GaN HEMTs, providing a robust foundation for the design of GaN power devices for space and other extreme-environment applications.

本研究定量考察了氢钝化对质子辐照下AlGaN/GaN高电子迁移率晶体管（HEMTs）电降解的影响。质子辐照能量为15 MeV，辐照量为5 × 1013 cm−2，比较辐照前后器件特性。在辐照前，钝化和未钝化装置之间的性能差异在5%以内。辐照后，未钝化器件的导通电流降低28.4%，跨导（gm）降低20%以上，接触电阻（Rc）增加28%。相比之下，氢钝化器件表现出稳定的运行，导通电流降解小于5%，gm变化3%，Rc变化仅为4%。这些改进归功于氢原子中和辐射引起的缺陷，包括供体和受体类陷阱，否则会降低电子迁移率并增加接触电阻。通过抑制陷阱激活、减轻电位波动和费米能级在AlGaN/GaN界面上的钉住，氢钝化稳定了二维电子气体（2DEG）密度和载流子输运，保持了辐照后的电流传导和界面可靠性。因此，氢钝化被认为是一种关键的辐射硬化策略，可以有效减轻AlGaN/GaN hemt中的电流退化和接触不稳定性，为空间和其他极端环境应用的GaN功率器件的设计提供坚实的基础。

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引用次数: 0

All-angle wideband acoustic self-collimation by Helmholtz resonators 亥姆霍兹谐振器全角度宽带声学自准直

IF 4.6 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Results in Physics

Pub Date : 2026-01-03 DOI: 10.1016/j.rinp.2026.108575

David Ramírez-Solana, Muhammad Gulzari

Phononic crystals and acoustic metamaterials have transformed acoustic wave control over the past three decades, enabling unprecedented manipulation of sound through tailored structural periodicity and local resonances. In this study, we demonstrate how Helmholtz resonators (HRs) embedded in square-lattice sonic crystals (SCs) achieve all-angle self-collimation (AASC) of acoustic waves across wide frequency ranges—a phenomenon previously attainable only with rectangular lattices or elliptical scatterers. Through finite element simulations, we analyze two types of Locally Resonant SCs (LRSCs) with different HR embedded scatterers: One with resonant frequency in the wavelength regime, classified as

H R - T 2

and another with a lower local resonance frequency, termed as

H R - T 1

. The

H R - T 2

case exhibits wideband All-Angle Self-Collimation(AASC) in the third band, covering 66.5% of its bandwidth (520 Hz), while

H R - T 1

shows frequency-sensitive super-collimation (FSSC) and AASC in the fourth band (22.86% bandwidth, 190 Hz). Frequency response analysis of finite supercell arrays validate robust collimation for incident angles up to 85°. Our findings highlight the unique ability of HRs to induce AASC in symmetric lattices, unlocking applications in directional sound control, low-loss acoustic waveguides, non-diffractive beam shaping, and high-resolution acoustic imaging systems.

在过去的三十年里，声子晶体和声学超材料已经改变了声波控制，通过定制的结构周期性和局部共振实现了前所未有的声音操纵。在这项研究中，我们展示了嵌入在方晶格声波晶体（SCs）中的亥姆霍兹谐振器（HRs）如何在宽频率范围内实现声波的全角度自准直（AASC），这种现象以前只能通过矩形晶格或椭圆散射体实现。通过有限元模拟，我们分析了具有不同HR嵌入散射体的两种类型的局部谐振SCs (LRSCs)：一种具有波长范围内的谐振频率，分类为HR - T2，另一种具有较低的局部谐振频率，称为HR - T1。HR−T2在第三波段表现出宽带全角度自准直（AASC），占其带宽的66.5% (520 Hz)，而HR−T1在第四波段表现出频率敏感超准直（FSSC）和AASC（22.86%带宽，190 Hz）。有限超级单体阵列的频率响应分析验证了入射角度高达85°的稳健准直。我们的研究结果强调了HRs在对称晶格中诱导AASC的独特能力，解锁了定向声控制、低损耗声波导、无衍射波束整形和高分辨率声成像系统中的应用。

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引用次数: 0

Experimental and simulation study of ZnO nanowire/Si heterojunctions as radioisotope batteries for long-term micro-power applications ZnO纳米线/Si异质结作为放射性同位素电池长期微功率应用的实验与模拟研究

IF 4.6 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Results in Physics

Pub Date : 2026-01-01 DOI: 10.1016/j.rinp.2025.108569

Alireza Shokri, Mina Amirmazlaghani

Betavoltaic batteries are emerging as a critical power solution for microelectronic systems requiring decades of maintenance-free operation. Among wide-bandgap semiconductors, zinc oxide (ZnO) is particularly attractive due to its radiation resistance and compatibility with silicon technology. In this work, we report the first experimental fabrication and characterization of ZnO/Si heterojunction betavoltaic cells using a ⁶³Ni beta source. Unlike previous studies limited to ZnO/n-Si junctions, we systematically investigated both ZnO/p-Si and ZnO/n-Si configurations, demonstrating that the ZnO/p-Si heterojunction exhibits superior performance owing to its intrinsic p–n junction, which enhances charge carrier separation under beta irradiation. ZnO nanowires (∼1 µm) were synthesized via a sol–gel method and deposited on silicon substrates by spin-coating to form heterojunctions. Structural (XRD, TEM, FESEM) and electrical characterizations confirmed device formation, with the p-Si/ZnO junction achieving a short-circuit current of 6 nA and an open-circuit voltage of 2.5 mV, compared to 0.04 nA and 6 mV for the n-Si/ZnO junction. To explain the discrepancy between simulated and measured efficiencies, we developed a comprehensive MCNP–TCAD simulation framework, which revealed that contact resistance, interface traps, and air–gap effects are dominant loss mechanisms. The model showed excellent agreement with experimental data and provided design strategies for performance enhancement.

This study establishes a validated simulation–experiment correlation, identifies key efficiency-limiting factors, and introduces a scalable fabrication route for ZnO/Si betavoltaic devices. The insights gained here offer valuable guidance for advancing high-efficiency, radiation-resistant nuclear micro-batteries for future IoT, space, and biomedical applications.

betavolta电池正在成为微电子系统的关键电源解决方案，需要数十年的免维护运行。在宽带隙半导体中，氧化锌（ZnO）由于其抗辐射和与硅技术的兼容性而特别有吸引力。在这项工作中，我们报告了使用63Ni β源首次实验制备和表征ZnO/Si异质结倍伏打电池。与以往仅限于ZnO/n-Si结的研究不同，我们系统地研究了ZnO/p-Si和ZnO/n-Si结构，表明ZnO/p-Si异质结由于其固有的p-n结而表现出优异的性能，从而增强了β辐射下的载流子分离。采用溶胶-凝胶法制备了ZnO纳米线（~ 1µm），并通过自旋涂层沉积在硅衬底上形成异质结。结构（XRD， TEM， FESEM）和电学表征证实了器件的形成，p-Si/ZnO结的短路电流为6 nA，开路电压为2.5 mV，而n-Si/ZnO结的短路电流为0.04 nA，开路电压为6 mV。为了解释模拟和测量效率之间的差异，我们开发了一个全面的MCNP-TCAD模拟框架，揭示了接触电阻、界面陷阱和气隙效应是主要的损耗机制。该模型与实验数据吻合良好，为提高性能提供了设计策略。本研究建立了经过验证的模拟-实验相关性，确定了关键的效率限制因素，并介绍了ZnO/Si β光伏器件的可扩展制造路线。这里获得的见解为未来物联网，空间和生物医学应用的高效，抗辐射核微电池的发展提供了有价值的指导。

{"title":"Experimental and simulation study of ZnO nanowire/Si heterojunctions as radioisotope batteries for long-term micro-power applications","authors":"Alireza Shokri, Mina Amirmazlaghani","doi":"10.1016/j.rinp.2025.108569","DOIUrl":"10.1016/j.rinp.2025.108569","url":null,"abstract":"<div><div>Betavoltaic batteries are emerging as a critical power solution for microelectronic systems requiring decades of maintenance-free operation. Among wide-bandgap semiconductors, zinc oxide (ZnO) is particularly attractive due to its radiation resistance and compatibility with silicon technology. In this work, we report the first experimental fabrication and characterization of ZnO/Si heterojunction betavoltaic cells using a <sup>63</sup>Ni beta source. Unlike previous studies limited to ZnO/n-Si junctions, we systematically investigated both ZnO/p-Si and ZnO/n-Si configurations, demonstrating that the ZnO/p-Si heterojunction exhibits superior performance owing to its intrinsic p–n junction, which enhances charge carrier separation under beta irradiation. ZnO nanowires (∼1 µm) were synthesized via a sol–gel method and deposited on silicon substrates by spin-coating to form heterojunctions. Structural (XRD, TEM, FESEM) and electrical characterizations confirmed device formation, with the p-Si/ZnO junction achieving a short-circuit current of 6 nA and an open-circuit voltage of 2.5 mV, compared to 0.04 nA and 6 mV for the n-Si/ZnO junction. To explain the discrepancy between simulated and measured efficiencies, we developed a comprehensive MCNP–TCAD simulation framework, which revealed that contact resistance, interface traps, and air–gap effects are dominant loss mechanisms. The model showed excellent agreement with experimental data and provided design strategies for performance enhancement.</div><div>This study establishes a validated simulation–experiment correlation, identifies key efficiency-limiting factors, and introduces a scalable fabrication route for ZnO/Si betavoltaic devices. The insights gained here offer valuable guidance for advancing high-efficiency, radiation-resistant nuclear micro-batteries for future IoT, space, and biomedical applications.</div></div>","PeriodicalId":21042,"journal":{"name":"Results in Physics","volume":"80 ","pages":"Article 108569"},"PeriodicalIF":4.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145924830","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

Machine learning approach for predicting heat and mass transfer in Maxwell–Sutterby fluid flow over a Riga plate geometry via Levenberg–Marquardt backpropagation neural network algorithm: influence of joule heating and activation energy 利用Levenberg-Marquardt反向传播神经网络算法预测里加板几何上麦克斯韦-萨特比流体传热传质的机器学习方法：焦耳加热和活化能的影响

IF 4.6 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Results in Physics

Pub Date : 2026-01-01 DOI: 10.1016/j.rinp.2025.108528

Gunisetty Ramasekhar , Muhammad Jawad , Shaik Jakeer , Seethi Reddy Reddisekhar Reddy , Walid Abdelfattah , Hakim AL Garalleh , Sarfaraz Kamangar

Activation energy is vital in chemical kinetics, influencing reaction rates and aiding in understanding and optimizing various industrial processes. This research aims to investigate the significance of activation energy on magnetized flow of Maxwell–Sutterby fluid bounded by Riga plate in the presence of motile microbes. For the inspiration of problem, the influence of variable thermal conductivity along with Nield boundary conditions are deliberated with ANNs modelling. The theory of heat transfer with joule heating and thermal radiation is measured. The governing PDEs of Maxwell–Sutterby fluid is transformed into nonlinear ODEs via similarity platform. The couple of obtained ODEs is solved via bvp5c in MATLAB then ANN is applied with Levenberg Marquardt training approach to them. The back propagation neural network is used to forecast the intended results. Graphical and tabulated outcomes are carryout for involved profiles such that fluids velocity

f'

, temperature

θ

, concentration

ϕ

and microbes

χ

over prominent parameters of interests. Further the graphs of physical quantities are also plotted. It is noticed that the skin friction factor

C_{f}

falls as the Hartmann number

H

rises, indicating a decline in surface shear stress. Conversely, the Nusselt number

Nu

boosts for developed values of

H

, indicating improved heat transfer at the surface. Furthermore, a rise in the thermophoresis parameter

Nt

improves the volumetric concentration distribution.

活化能在化学动力学中是至关重要的，它影响反应速率，有助于理解和优化各种工业过程。本研究旨在探讨活化能对活动微生物存在时以里加板为界的麦克斯韦-萨特比流体磁化流动的影响。为了给问题提供启发，利用人工神经网络建模，考虑了热导率随场边界条件变化的影响。对焦耳加热和热辐射传热理论进行了测量。通过相似平台将麦克斯韦-萨特比流体的控制偏微分方程转化为非线性偏微分方程。在MATLAB中利用bvp5c对得到的ode对进行求解，然后利用Levenberg Marquardt训练方法对其进行人工神经网络处理。利用反向传播神经网络对预期结果进行预测。对所涉及的剖面进行图形化和制表化的结果，使流体速度f '、温度θ、浓度ϕ和微生物χ超过感兴趣的突出参数。此外，还绘制了物理量的曲线图。可以看出，表面摩擦系数Cf随着哈特曼数H的增大而减小，表明表面剪应力减小。相反，随着H值的增大，努塞尔数Nu增大，表明表面传热得到改善。此外，热泳参数Nt的增加改善了体积浓度分布。

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引用次数: 0

Annealing effect on physical properties and antibacterial performance in green-Turmeric co-precipitated silver-cobalt-ferrite nanoparticles utilizing fine-sediments as iron-cations source-materials 以细沉积物为铁离子源材料的绿色-姜黄共沉淀银钴铁氧体纳米粒子的物理性能和抗菌性能的退火影响

IF 4.6 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Results in Physics

Pub Date : 2026-01-01 DOI: 10.1016/j.rinp.2025.108572

Riyatun , Adiana Musadewi , Utari , Nurdiyantoro Putra Prasetya , ST.Ulfawanti Intan Subadra , Nandang Mufti , Markus Diantoro , Munasir , Ahmad Taufiq , Budi Purnama

The silver-substituted cobalt ferrite nanoparticles (AgCFO-NPs) have been successfully synthesized using green-coprecipitated method with turmeric (Curcuma Longa Linn) extract with utilizing a fine-sediment iron-sand as Fe³⁺ ions source. XRD results show the spectral data is in accordance with ICDD No. 22–1086, thus confirming that the cobalt ferrite nanocrystal phase is present. Crystallite size calculation increase D = 22.00 nm to 31.45 nm with an increasing annealing temperature (T_a = 100 °C to 500 °C). Characteristic FTIR curve show adsorption-peak band around v₁ = ∼569.99 cm⁻¹ and v₂ = ∼399.28 cm⁻¹ indicate to the intrinsic vibration of metal–oxygen bonds at the tetrahedral and octahedral sites of the spinel structure. Furthermore, temperature of annealing T_a tunes the magnetic properties of the AgCFO-NPs_. SEM result show that the green synthesis realizes nanoparticles wrapped into large granules (T_a = 100 °C and 200 °C) and then the granular wrapping gradually disappears with the increase of the T_a (300 °C, 400 °C and 500 °C). Finally, antibacterial performance (for Staphylococcus aureus and Escherichia coli) show that the highest zone-inhibition of 16.70 mm (at 300 °C) in S. aureus and 14.88 mm (at 200 °C) in E. coli are observed, respectively. Here, nanoparticles utilizing fine-sediment iron-sand are promising as an effective and biocompatible antibacterial agent in next-future medical application.

以姜黄（Curcuma Longa Linn）提取物为原料，以细沉积铁砂为Fe3+离子源，采用绿色共沉淀法成功合成了银取代钴铁氧体纳米颗粒（AgCFO-NPs）。XRD结果表明，光谱数据与ICDD No. 22-1086一致，证实了钴铁氧体纳米晶相的存在。随着退火温度（Ta = 100℃~ 500℃）的升高，晶粒尺寸增大D = 22.00 nm ~ 31.45 nm。特征FTIR曲线显示v1 = ~ 569.99 cm−1和v2 = ~ 399.28 cm−1附近的吸附峰带表明尖晶石结构四面体和八面体位置的金属-氧键存在固有振动。此外，退火温度可以调节AgCFO-NPs的磁性能。SEM结果表明，绿色合成实现了纳米颗粒包裹成大颗粒（Ta = 100℃和200℃），然后随着Ta（300℃、400℃和500℃）的增加，颗粒包裹逐渐消失。最后，抗菌性能（对金黄色葡萄球菌和大肠杆菌）表明，金黄色葡萄球菌和大肠杆菌的最高区抑率分别为16.70 mm（300°C）和14.88 mm（200°C）。在这里，利用细沉积铁砂的纳米颗粒有望在未来的医学应用中成为一种有效的生物相容性抗菌剂。

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引用次数: 0

Corrigendum to “Systematic optimization of Cs-Sb-O activated NEA GaAs photocathodes for long-lived accelerator electron sources”. [Results Phys. 80 (2026) 108552] “长寿命加速器电子源Cs-Sb-O活化NEA GaAs光电阴极的系统优化”的勘误表。[结果物理学报80 (2026)108552]

IF 4.6 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Results in Physics

Pub Date : 2026-01-01 DOI: 10.1016/j.rinp.2025.108568

Lei Guo , Yoshifumi Takashima , Masao Kuriki , Masahiro Yamamoto

引用次数: 0

Engineering multifunctional response in monolayer Fe3O4 via Zr adsorption: from half-metallicity to enhanced piezoelectricity 通过Zr吸附的单层Fe3O4的工程多功能响应：从半金属性到增强压电性

IF 4.6 2区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Results in Physics

Pub Date : 2026-01-01 DOI: 10.1016/j.rinp.2025.108556

Sikander Azam , Qaiser Rafiq , Rajwali Khan , Hamdy Khamees Thabet

Two-dimensional (2D) magnetic oxides are increasingly studied for their multifunctional potential in fields like spintronics, optoelectronics, and energy conversion. In this research, we conduct a detailed first-principles study of pure monolayer Fe₃O₄ and its modification through Zr adsorption at two sites: on top of an Fe atom and at the bridge between Fe atoms. Using spin-polarized density functional theory with the GGA + U method, we examine how adsorption affects structure, electronic, magnetic, optical, elastic, and piezoelectric properties. The original monolayer shows half-metallicity, strong spin polarization, and a moderate in-plane piezoelectric effect. Zr adsorption causes local lattice distortions and orbital hybridization, resulting in intermediate electronic states, a reduced bandgap, and increased optical absorption in both spin channels. Notably, Zr at the bridge site greatly enhances dielectric response, optical conductivity, and piezoelectric coefficients, tripling e₁₁ compared to the pristine layer. Elastic constants indicate mechanical softening after functionalization, and energy loss spectra display shifts in plasmon resonance. These findings suggest Zr adsorption offers a controllable, non-destructive way to tune spin, charge, and lattice interactions in Fe₃O₄ monolayers, connecting magnetic, optical, and piezoelectric functionalities within a single 2D material platform.

二维磁性氧化物因其在自旋电子学、光电子学和能量转换等领域的多功能潜力而受到越来越多的研究。在本研究中，我们对纯单层Fe3O4进行了详细的第一性原理研究，并通过在两个位置：铁原子顶部和铁原子之间的桥上吸附Zr对其进行改性。利用自旋极化密度泛函理论和GGA + U方法，我们研究了吸附如何影响结构、电子、磁性、光学、弹性和压电性能。原始单层材料表现出半金属性、强自旋极化和适度的面内压电效应。Zr吸附引起局部晶格畸变和轨道杂化，导致中间电子态、带隙减小和两个自旋通道的光吸收增加。值得注意的是，与原始层相比，桥梁处的Zr极大地提高了介电响应、光学电导率和压电系数，使e11增加了两倍。弹性常数表明功能化后的机械软化，能量损失谱显示等离子体共振的位移。这些发现表明，Zr吸附提供了一种可控的、非破坏性的方式来调节Fe3O4单层中的自旋、电荷和晶格相互作用，在单个二维材料平台内连接磁性、光学和压电功能。

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引用次数: 0