Nano-Structures & Nano-Objects最新文献

Formation of gold–peptide superspheres via biomineralization and self-assembly mediated by a redox-active His–Phe dipeptide 通过氧化还原活性His-Phe二肽介导的生物矿化和自组装形成金肽超球

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects

Pub Date : 2026-09-01 DOI: 10.1016/j.nanoso.2026.101756

Naoaki Hiramatsu, Asuka Inada, Tatsuya Oshima

Developing sustainable, “green” synthetic routes for functional nanomaterials is essential for advancing biocompatible nanotechnology. In this study, we report the bottom-up biomineralization of gold–peptide supersphere composites (Au–HF SCs) using a biocompatible His–Phe (HF) dipeptide via a one-pot strategy without the addition of a separate reducing reagent. The HF peptide simultaneously functions as a reducing agent, self-assembling unit, capping agent, and stabilizer, enabling the formation of uniform composite nanostructures simply by mixing and heating with Au(III). By varying the peptide/Au(III) molar ratio from 0.67 to 17, the primary particle size of Au nanoparticles (AuNPs) and the morphology of secondary spherical assemblies were tunably controlled. The catalytic performance of the resulting Au–HF SCs was evaluated via the reduction of 4-nitrophenol (4-NP) as a model reaction. Characterization revealed hierarchical structures consisting of primary AuNPs (8–13 nm) supported on secondary peptide spheres (190–320 nm). The apparent rate constant (

k_{app}

) exhibited characteristic concentration dependences on 4-NP and

{BH}_{4}^{-}

, which were accurately described by the Langmuir–Hinshelwood model. Kinetic analysis provided adsorption and surface reaction rate constants, revealing that Au–HF SCs with a primary particle size of approximately 10 nm exhibited the highest catalytic activity. Furthermore, Eyring and Arrhenius analyses were conducted to determine the activation enthalpy, activation entropy, and activation energy, verifying the correlation between catalyst structure and kinetic parameters. Peptide-templated gold superspheres demonstrate that catalytic activity depends on particle size and molecular-level structural order, offering a versatile platform for designing advanced, multifunctional nanocatalysts.

为功能性纳米材料开发可持续的“绿色”合成路线对于推进生物相容性纳米技术至关重要。在这项研究中，我们报道了使用生物相容性的His-Phe （HF）二肽通过一锅策略自下而上地生物矿化金肽超球复合材料（Au-HF SCs），而无需添加单独的还原试剂。HF肽同时具有还原剂、自组装单元、封盖剂和稳定剂的功能，只需与Au（III）混合加热即可形成均匀的复合纳米结构。通过改变肽/Au（III）的摩尔比从0.67到17，可以调节Au纳米颗粒（AuNPs）的初级粒径和次级球形组件的形态。通过还原4-硝基苯酚（4-NP）作为模型反应，评价了所得Au-HF SCs的催化性能。表征揭示了由一级AuNPs（8-13 nm）支撑在二级肽球（190-320 nm）上的分层结构。Langmuir-Hinshelwood模型准确地描述了表观速率常数（kapp）对4-NP和BH4−的浓度依赖性。动力学分析获得了吸附和表面反应速率常数，结果表明，初级粒径约为10 nm的Au-HF SCs具有最高的催化活性。通过Eyring和Arrhenius分析确定了活化焓、活化熵和活化能，验证了催化剂结构与动力学参数之间的相关性。肽模板金超球表明，催化活性取决于颗粒大小和分子水平的结构顺序，为设计先进的多功能纳米催化剂提供了一个通用平台。

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引用次数: 0

Defects, interfaces, and charge transport in functional micro/nano powder systems 功能微/纳米粉末系统中的缺陷、界面和电荷输运

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects

Pub Date : 2026-09-01 Epub Date: 2026-09-04 DOI: 10.1016/j.nanoso.2026.101752

J.E. Leal-Perez, A. Hurtado-Macias

Micro/nano powders are central to functional materials research, yet their behavior is still commonly interpreted through composition, synthesis strategy, or target application alone. Such descriptors are useful initially, but they do not explain why powders with apparently similar chemistry or architecture can exhibit markedly different functional responses under comparable conditions. The underlying difficulty is that the powder state creates a structurally and electronically heterogeneous environment in which reduced dimensions, high surface area, agglomerate porosity, defects, interfaces, and carrier pathways interact across surfaces, grain boundaries, heterointerfaces, and interparticle networks. A solid-state physics framework is developed for interpreting micro/nano powders through three coupled dimensions: defect landscapes, interfacial electrostatics, and charge-transport regimes. Rather than surveying material families descriptively, the analysis examines how defect partitioning, band-edge restructuring, trap states, space-charge formation, and transport-limited charge handling jointly define the active state of powders under operation. Particular attention is given to semiconducting and functional powder systems relevant to photocatalysis and energy conversion. The analysis shows that widely used explanations in powder literature remain incomplete when treated in isolation. On that basis, a variable-centered framework is proposed, together with an evidence hierarchy, application-level mapping, and minimum reporting logic, to support more physically grounded comparison and design of functional powders for energy-conversion technologies.

微/纳米粉末是功能材料研究的核心，但它们的行为仍然通常通过组成、合成策略或目标应用来解释。这些描述符最初是有用的，但它们不能解释为什么具有明显相似化学或结构的粉末在可比条件下会表现出明显不同的功能反应。潜在的困难是粉末状态创造了一个结构上和电子上的异质环境，在这个环境中，缩小的尺寸、高表面积、团聚孔隙、缺陷、界面和载流子通路在表面、晶界、异质界面和颗粒间网络上相互作用。本文开发了一个固态物理框架，通过三个耦合维度来解释微/纳米粉末：缺陷景观、界面静电和电荷输运机制。而不是描述性地调查材料族，分析检查如何缺陷划分，带边重组，陷阱状态，空间电荷形成，和运输限制电荷处理共同定义粉末的活性状态下的操作。特别关注与光催化和能量转换有关的半导体和功能粉末系统。分析表明，粉末文献中广泛使用的解释在单独处理时仍然是不完整的。在此基础上，提出了一个以变量为中心的框架，以及证据层次、应用层映射和最小报告逻辑，以支持更物理接地的能量转换技术功能粉末的比较和设计。

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引用次数: 0

Accounting for dynamical scattering in HRTEM FFT interpretation using electron diffraction simulations of hybrid perovskites 利用杂化钙钛矿的电子衍射模拟计算HRTEM FFT解释中的动态散射

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects

Pub Date : 2026-09-01 Epub Date: 2026-08-29 DOI: 10.1016/j.nanoso.2026.101753

Mario A. Millán-Franco, José Reyes Gasga

The hybrid organometallic perovskite CH₃NH₃PbI₃ has attracted significant interest due to its structural properties and potential applications in solar cells, light-emitting diodes (LEDs), and detectors. This material exhibits different crystalline phases that can vary with temperature, humidity, and the presence of the organic cation CH₃NH₃⁺, which complicates its structural characterization via transmission electron microscopy (TEM). Analysis of fast Fourier transforms (FFTs) of high-resolution TEM (HRTEM) images indicates the existence of reflections forbidden by the perovskite structure factor. In order to identify their origin, in this work, we present the electron diffraction analysis and diffraction simulation of the most stable tetragonal phase (space group I4cm) of the hybrid perovskite, aimed at identifying and analyzing the predominant characteristics in reciprocal space. The results indicate, in addition to the structure factor allowed reflections, the existence of dynamically excited forbidden reflections associated with multiple diffraction of the sample-electron beam interaction. This combined experimental and simulation approach provides a better interpretation of TEM images and a more reliable structural characterization of beam-sensitive materials under dynamical scattering conditions.

混合有机金属钙钛矿CH3NH3PbI3由于其结构特性和在太阳能电池、发光二极管（led）和探测器中的潜在应用而引起了人们的极大兴趣。这种材料表现出不同的结晶相，可以随着温度、湿度和有机阳离子CH3NH3+的存在而变化，这使得通过透射电子显微镜（TEM）表征其结构变得复杂。高分辨率透射电镜（HRTEM）图像的快速傅里叶变换（FFTs）分析表明，钙钛矿结构因素禁止了反射的存在。为了确定它们的来源，本文对杂化钙钛矿最稳定的四方相（空间群I4cm）进行了电子衍射分析和衍射模拟，旨在识别和分析其在互易空间中的主要特征。结果表明，除了结构因素的允许反射外，与样品-电子束相互作用的多重衍射有关的动态激发禁止反射的存在。这种实验和模拟相结合的方法提供了更好的TEM图像解释和更可靠的动态散射条件下光束敏感材料的结构表征。

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引用次数: 0

State-of-the-art nano zero-valent iron-based composites: Nano-structural design, functionalization, and environmental applications 最先进的纳米零价铁基复合材料：纳米结构设计、功能化和环境应用

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects

Pub Date : 2026-09-01 Epub Date: 2026-08-29 DOI: 10.1016/j.nanoso.2026.101754

Safa Senan Mahmod, Maha Mohammad AL-Rajabi, Haider Ismael, Rawdah Whba, Abeir Hussein Mohamed Gameil, Fathyah Whba, Salma Samidin, Peer Mohamed Abdul

Nano zero-valent iron (nZVI) is a highly reactive nanomaterial with a large surface area-to-volume ratio and intrinsic magnetic properties that give it great potential to be utilized in a wide range of applications. This review critically discusses the technological features of nZVI from synthesis to sophisticated industrial applications. The results showed that directed composite modifications (support immobilisation, surface modification, bimetallic incorporation, encapsulation and sulphurisation) strongly improved the performance of nZVI for specific applications. nZVI removes 81–99.7% of toxic contaminants (such as heavy metals and dyes) and degrade antibiotics into less harmful by-products in the treatment of industrial wastewater. Crucially, by detoxifying microbial inhibitors and serving as an essential enzymatic cofactor. nZVI directly stimulates biological valorisation routes, enhancing biohydrogen and biomethane yields and enabling the production of value-added liquid biochemicals, such as short- and medium-chain fatty acids. The existing life cycle assessment (LCA) studies point to a critical knowledge gap, since synthesis methods are widely investigated, while the environmental and industrial implications of nZVI deployment are still not sufficiently explored. Finally, the review evaluates a number of pilot-scale applications of nZVI and lists critical challenges that need to be addressed for sustainable, cost-effective and scalable application.

纳米零价铁（nZVI）是一种高活性的纳米材料，具有较大的表面积体积比和固有的磁性能，具有广泛的应用潜力。本文评述了nZVI从合成到复杂工业应用的技术特点。结果表明，定向复合改性（载体固定化、表面改性、双金属掺入、包封和硫化）极大地提高了nZVI在特定应用中的性能。nZVI可以去除81-99.7%的有毒污染物（如重金属和染料），并在处理工业废水时将抗生素降解为危害较小的副产品。至关重要的是，通过解毒微生物抑制剂和作为必要的酶辅因子。nZVI直接刺激生物增值途径，提高生物氢和生物甲烷的产量，并使增值液体生化物质的生产成为可能，如短链和中链脂肪酸。现有的生命周期评估（LCA）研究指出了一个关键的知识缺口，因为合成方法得到了广泛的研究，而nZVI部署的环境和工业影响仍然没有得到充分的探讨。最后，评估了一些nZVI的试点应用，列出了可持续、经济、可扩展应用需要解决的关键挑战。

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引用次数: 0

Engineering Ag2O@ZnO-loaded ZIF-67 nanohybrids via structured impregnation: Antibacterial performance and in silico study 工程Ag2O@ZnO-loaded通过结构浸渍的ZIF-67纳米杂化物：抗菌性能和硅研究

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects

Pub Date : 2026-09-01 DOI: 10.1016/j.nanoso.2026.101755

Evi Maryanti, Eka Angasa, Enny Nugraheni, Kiky Corneliasari Sembiring, Wulan Aprilia Syafitri, Lala Adetia Marlina

The development of efficient antibacterial materials is essential to address the increasing resistance of pathogenic bacteria. In this study, Ag₂O@ZnO-loaded ZIF-67 (ZAZO) nanocomposites were successfully synthesized via a structured impregnation method to enhance antibacterial performance. The structural and physicochemical properties of the materials were systematically characterized using XRD, FTIR, Raman spectroscopy, SEM, HR-TEM, EDS, XPS, and UV–Vis DRS. The results confirmed the successful incorporation of Ag₂O and ZnO into the ZIF-67 framework while preserving the MOF structure and forming well-defined heterointerfaces. Optical analysis revealed lower apparent optical transition energies (1.96–1.98 eV) than pristine ZnO, suggesting enhanced visible-light absorption. Antibacterial activity was evaluated against Salmonella typhi, Enterococcus faecalis, and Propionibacterium acnes. Among the synthesized materials, the ZAZO 4:1:2 composite exhibited the most balanced antibacterial performance, showing inhibition zones comparable to the positive control against Salmonella typhi. The enhanced antibacterial activity is proposed to arise from the combined effects of controlled Ag⁺ and Co²⁺ ion release, improved nanoparticle dispersion within the porous ZIF-67 matrix, and heterojunction-mediated reactive oxygen species (ROS) generation pathways inferred from the optical characterization of the composite. Molecular docking analysis further supports the proposed antibacterial mechanism by indicating favorable interactions between the nanocomposite and bacterial target proteins. These findings demonstrate that Ag₂O@ZnO-loaded ZIF-67 nanohybrids represent a promising platform for antibacterial applications.

开发高效抗菌材料是解决病原菌耐药性日益增强的关键。本研究通过结构浸渍法制备了Ag2O@ZnO-loaded ZIF-67 （ZAZO）纳米复合材料，提高了其抗菌性能。采用XRD、FTIR、拉曼光谱、SEM、HR-TEM、EDS、XPS和UV-Vis DRS对材料的结构和理化性质进行了系统表征。结果证实了Ag2O和ZnO成功地结合到ZIF-67框架中，同时保留了MOF结构并形成了明确的异质界面。光学分析显示，与原始ZnO相比，其表观光学跃迁能（1.96-1.98 eV）较低，表明可见光吸收增强。对伤寒沙门氏菌、粪肠球菌和痤疮丙酸杆菌的抑菌活性进行了评价。在所合成的材料中，ZAZO 4:1:2复合材料的抑菌性能最为均衡，其抑菌带与阳性对照相当。抗菌活性的增强是由控制Ag+和Co2+离子释放、改善纳米颗粒在多孔ZIF-67基质内的分散以及从复合材料的光学表征推断的异结介导的活性氧（ROS）生成途径的综合作用引起的。分子对接分析进一步支持了所提出的抗菌机制，表明纳米复合材料与细菌靶蛋白之间存在良好的相互作用。这些发现表明Ag2O@ZnO-loaded ZIF-67纳米杂化物代表了一个很有前景的抗菌应用平台。

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引用次数: 0

A CMMT/APU Hydrogel-Based Triboelectric Nanogenerator for High-Precision Self-Powered Human-Motion Monitoring 用于高精度自供电人体运动监测的CMMT/APU水凝胶摩擦电纳米发电机

Q1 Physics and Astronomy

Nano-Structures & Nano-Objects

Pub Date : 2026-05-29 DOI: 10.1142/s1793292026501377

Xiuchang Yang, Jikai Si

Developing flexible self-powered sensors capable of simultaneously converting biomechanical stimuli into electrical signals and supporting wearable motion analysis is of considerable importance for next-generation intelligent monitoring systems. In this work, a conductive montmorillonite/amphiphilic polyurethane (CMMT/APU) hydrogel-based triboelectric nanogenerator (CA-TENG) is constructed by integrating a conductive montmorillonite-modified hydrogel electrode with a contact-separation triboelectric configuration. Polytetrafluoroethylene (PTFE) and nylon are selected as the triboelectric layers, while the CMMT/APU hydrogel is employed as the flexible conductive electrode. Owing to the cooperative effect between conductive montmorillonite and the amphiphilic polyurethane network, the hydrogel exhibits good flexibility, structural stability, and mechanical adaptability, and the composition containing 5% CMMT presents the most suitable tensile performance for device fabrication. The optimized CA-TENG delivers a peak open-circuit voltage ([Formula: see text] of 777[Formula: see text]V, a short-circuit current ([Formula: see text] of 39[Formula: see text][Formula: see text]A, and a transferred charge ([Formula: see text] of 250[Formula: see text]nC, together with a maximum output power of 598[Formula: see text][Formula: see text]W. Moreover, the device shows stable output under different working frequencies, separation distances, and humidity conditions, and it can effectively distinguish walking, running, jumping, and joint-bending motions, demonstrating strong potential for self-powered wearable-motion monitoring and biomechanical analysis.

开发能够同时将生物力学刺激转换为电信号并支持可穿戴运动分析的柔性自供电传感器对于下一代智能监测系统非常重要。在这项工作中，通过将导电蒙脱土修饰的水凝胶电极与接触分离的摩擦电结构相结合，构建了导电蒙脱土/两亲性聚氨酯（CMMT/APU）水凝胶基摩擦电纳米发电机（CA-TENG）。选用聚四氟乙烯（PTFE）和尼龙作为摩擦电层，采用CMMT/APU水凝胶作为柔性导电电极。由于导电蒙脱土与两亲性聚氨酯网络的协同作用，水凝胶具有良好的柔韧性、结构稳定性和机械适应性，其中含5% CMMT的组合物具有最适合器件制造的拉伸性能。优化后的CA-TENG的峰值开路电压（[公式：见文]）为777 V，短路电流（[公式：见文]）为39[公式：见文][公式：见文]a，转移电荷（[公式：见文]）为250 nC，最大输出功率为598 W[公式：见文][公式：见文]W。此外，该装置在不同工作频率、分离距离和湿度条件下均表现出稳定的输出，并能有效区分行走、跑步、跳跃和关节弯曲等运动，具有很强的自供电可穿戴运动监测和生物力学分析潜力。

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引用次数: 0

Exciton and biexciton states in III-nitride quantum dots: Effects of internal polarization fields and indium composition on optical response iii -氮化物量子点中的激子和双激子态：内部偏振场和铟成分对光学响应的影响

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects

Pub Date : 2026-05-01 Epub Date: 2026-04-25 DOI: 10.1016/j.nanoso.2026.101650

Gor Kharatyan , David Hayrapetyan , Rodion Reznik , Nabil Zeiri , Sotirios Baskoutas , Paytsar Mantashyan

This work presents a theoretical investigation of excitonic and biexcitonic states in cylindrical wurtzite III-nitride quantum dots, focusing on the influence of internal polarization fields and indium composition on their electronic and optical properties. The confinement potential is modeled using a bimodal Woods–Saxon profile that incorporates both band offsets and dielectric self-energy corrections, providing a realistic description of carrier confinement. Single-particle states are calculated using the finite element method, while exciton and biexciton complexes are analyzed through a variational Monte Carlo approach.

The results reveal that the combined effects of piezoelectric polarization and spontaneous polarization significantly distort the confinement potential, leading to strong spatial separation of electron and hole wave functions and substantial modifications of exciton and biexciton binding energies. Increasing indium concentration three times enhances the internal electric field and leads to a clear redistribution of carrier density across the quantum dot. This effect reduces the electron–hole overlap and results in a decrease of both exciton and biexciton binding energies in larger quantum dots, while in smaller structures (heights below ∼2 nm) the confinement dominates, leading to an opposite trend and partial stabilization of biexciton states. The calculated exciton transition energy for a cylindrical quantum dot with 2 nm height and 10 nm radius is approximately 2.5 eV, in good agreement with reported experimental values (∼2.55 eV) for similar structures, confirming the validity of the model.

In addition, the nonlinear optical response is analyzed using a three-level exciton–biexciton scheme. Biexciton transitions exhibit about two times stronger response than excitonic ones. Lower indium content induces a blue shift, while higher concentration reduces peak intensity due to enhanced carrier separation. These findings demonstrate how the interplay between internal polarization, composition, and quantum confinement governs excitonic complexes and nonlinear optical properties in III-nitride quantum dots.

本文从理论上研究了圆柱形纤锌矿iii型氮化量子点的激子态和双激子态，重点研究了内部极化场和铟成分对其电子和光学性质的影响。约束势使用双峰Woods-Saxon曲线建模，该曲线结合了带偏移和介电自能校正，提供了载流子约束的真实描述。单粒子态采用有限元方法计算，激子和双激子复合物采用变分蒙特卡罗方法分析。结果表明，压电极化和自发极化的联合作用显著地扭曲了约束势，导致电子和空穴波函数的强烈空间分离以及激子和双激子结合能的实质性改变。将铟浓度增加三倍，增强了内部电场，并导致载流子密度在量子点上的明显重新分布。这种效应减少了电子-空穴重叠，并导致较大的量子点中激子和双激子结合能的降低，而在较小的结构（高度低于~ 2 nm）中，约束占主导地位，导致双激子状态的相反趋势和部分稳定。计算出高度为2 nm、半径为10 nm的圆柱形量子点激子跃迁能约为2.5 eV，与类似结构的实验值（~ 2.55 eV）吻合良好，证实了模型的有效性。此外，采用三能级激子-双激子方案分析了非线性光学响应。双激子跃迁的响应强度是激子跃迁的两倍。较低的铟含量引起蓝移，而较高的铟含量由于增强载流子分离而降低峰强度。这些发现证明了内部极化、组成和量子约束之间的相互作用如何影响iii -氮化物量子点的激子复合物和非线性光学性质。

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引用次数: 0

Efficient nanolignocellulose synthesis from edamame peel waste using an Amberlite IR-120 catalytic route 利用Amberlite IR-120催化途径从毛豆皮废料中高效合成纳米纤维素

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects

Pub Date : 2026-05-01 Epub Date: 2026-05-05 DOI: 10.1016/j.nanoso.2026.101669

Merdieta Amelia , Holilah , Didik Prasetyoko , RH Fitri Faradilla , Asranudin , Agus Wedi Pratama , Zuratul Ain Abdul Hamid , Bambang Piluharto , Dwi Indarti , Mohd Saiful Asmal Rani , Dina Wahyu Indriani , Lisman Suryanegara , Mohd Nor Faiz Norrrahim , Noureddine El Messaoudi

The development of efficient synthesis methods to valorize biomass feedstocks is essential for a circular bioeconomy. This study details the synthesis of nanolignocellulose (NLC) from edamame peel waste, an underutilized agro-industrial residue, using an Amberlite IR-120 catalytic route. The synthesis was optimized by varying catalyst concentration (0.5–2.0 M) at 80 °C for 3 h. The efficiency of this route was confirmed by the successful production of NLC with high crystallinity (up to 49.94%) and fine nanofibrillar diameters (down to 4.24 nm) at the optimal concentration of 1 M. Fourier Transform Infrared (FTIR) analysis confirmed the effective removal of amorphous hemicellulose and lignin. Catalyst reusability was systematically evaluated over three successive cycles. The average fibril diameter increased to 6.10 nm (RNLC1), 9.46 nm (RNLC2), and 10.10 nm (RNLC3), indicating progressive loss of catalytic efficiency with repeated use. Correspondingly, the crystallinity index increased slightly to 52.95% after the first reuse but decreased sharply to 39.32% after the second cycle before partially recovering to 50.13% in the third cycle. This study validates that the use of Amberlite IR-120 is a sustainable alternative to liquid acids, producing high-value NLC suitable for applications in biocomposites and packaging.

发展有效的合成方法以使生物质原料增值对循环生物经济至关重要。本研究详细介绍了利用Amberlite IR-120催化途径，从毛豆皮废料（一种未充分利用的农工废渣）合成纳米木质素纤维素（NLC）。通过改变催化剂浓度（0.5-2.0 M），在80℃下反应3 h，优化了合成。在最佳浓度为1 M时，成功制备了高结晶度（高达49.94%）和细纳米纤维直径（低至4.24 nm）的NLC，证实了该方法的效率。傅里叶变换红外（FTIR）分析证实了非晶态半纤维素和木质素的有效去除。在三个连续的循环中系统地评估了催化剂的可重用性。平均纤维直径增加到6.10 nm (RNLC1), 9.46 nm （RNLC2）和10.10 nm (RNLC3)，表明随着重复使用，催化效率逐渐下降。相应的，结晶度指数在第一次重复使用后略有上升至52.95%，但在第二次循环后急剧下降至39.32%，第三次循环时部分回升至50.13%。该研究验证了使用Amberlite IR-120是一种可持续的液体酸替代品，可生产适用于生物复合材料和包装的高价值NLC。

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引用次数: 0

Green synthesis of phaleria macrocarpa–mediated V–Mn bimetallic nanoparticles: Structural, magnetic, antimicrobial, and anticancer properties 绿色合成大竹节草介导的V-Mn双金属纳米颗粒：结构、磁性、抗菌和抗癌特性

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects

Pub Date : 2026-05-01 Epub Date: 2026-05-30 DOI: 10.1016/j.nanoso.2026.101706

R. Shanmugapriya , G. Nedunchezhian , C. Vijayaraj , S. Ramalingam

Biological synthesis of multifunctional nanomaterials has been explored as a novel approach towards meeting the escalating challenges of antimicrobial resistance and cancer treatment. In the current investigation, the successful synthesis of V₂O₅-MnCl₂ bimetallic nanoparticles was accomplished using a phyto-mediated coprecipitation method, where the reducing and stabilizing agent was the fruit extract of the Phaleria macrocarpa plant. The resulting biologically synthesized nanoparticles were subjected to a post-synthesis annealing process at 400, 500, and 600 °C, which enabled the assessment of the temperature-dependent structural, optical, magnetic, antimicrobial, and anticancer characteristics. X-ray diffraction studies confirmed the successful formation of the bimetallic phases, which exhibited a progressive enhancement in crystal perfection and lattice order, validated through FWHM and Williamson-Hall plot analyses. FT-IR studies confirmed the role of the functional groups present in the phytochemicals, which contributed towards the improved metal-oxygen bonds after the annealing process. UV-Vis studies clearly indicated the improved absorbance, which was accompanied by the modification of the band structures, especially in the 500 °C annealed sample. SEM and DLS studies clearly revealed the progressive development from the agglomerated nanoparticles towards the defined nanostructures at the 500 °C annealed sample, which was later accompanied by the development of larger grains at the 600 °C annealed sample. VSM studies clearly revealed the paramagnetic nature, which was accompanied by the improved magnetic susceptibility values after the annealing treatment. Results from the antimicrobial studies clearly indicated the strong antimicrobial activities towards the Gram-positive and Gram-negative bacteria, which were observed in the annealed samples, which exhibited improved inhibition compared to the unannealed sample. Finally, the cytotoxicity studies, which were conducted using the MTT assay, clearly demonstrated the dose-dependent cytotoxicity towards the breast cancer cells, indicating the improved anticancer efficacy. Based on the current investigation, the results clearly validated that the annealing treatment at 500–600 °C was optimal towards the improved multifunctionality of the biologically synthesized V-Mn bimetallic nanoparticles, which have the potential towards the development of novel biomedicine.

多功能纳米材料的生物合成已经被探索作为一种新的方法来满足不断升级的抗菌素耐药性和癌症治疗的挑战。在目前的研究中，使用植物介导的共沉淀法成功合成了V₂O₅-MnCl₂双金属纳米颗粒，其中还原和稳定剂是大玻璃植物的果实提取物。得到的生物合成纳米颗粒在400、500和600°C下进行合成后退火处理，从而能够评估温度依赖性结构、光学、磁性、抗菌和抗癌特性。x射线衍射研究证实了双金属相的成功形成，通过FWHM和Williamson-Hall图分析证实，双金属相的晶体完美度和晶格有序度逐渐增强。FT-IR研究证实了植物化学物质中存在的官能团的作用，这有助于退火过程后金属-氧键的改善。UV-Vis研究清楚地表明，吸光度的提高伴随着能带结构的改变，特别是在500°C退火样品中。SEM和DLS研究清楚地表明，在500℃退火样品中，纳米颗粒从凝聚到明确的纳米结构逐渐发展，随后在600℃退火样品中伴随着更大晶粒的发展。VSM研究清楚地揭示了顺磁性，并伴随着退火处理后磁化率值的提高。抗菌实验结果表明，对革兰氏阳性菌和革兰氏阴性菌具有较强的抑菌活性，与未退火样品相比，退火样品的抑菌效果更好。最后，使用MTT法进行的细胞毒性研究清楚地证明了对乳腺癌细胞的剂量依赖性细胞毒性，表明抗癌效果有所提高。基于目前的研究，结果清楚地验证了500-600°C的退火处理对于提高生物合成的V-Mn双金属纳米颗粒的多功能性是最佳的，这具有开发新型生物医学的潜力。

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引用次数: 0

Modeling the temperature and magnetic field dependence of the band gap in narrow-gap quantum well semiconductors 窄隙量子阱半导体中带隙对温度和磁场依赖性的建模

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects

Pub Date : 2026-05-01 Epub Date: 2026-06-01 DOI: 10.1016/j.nanoso.2026.101707

U.I. Erkaboev, R.G. Rakhimov, J.I. Mirzaev, N.A. Sayidov, M.G. Dadamirzaev, Q.A. Temirov

The fundamental physical parameter of both bulk and low-dimensional semiconductor structures is the band gap

(E_{g}^{3 d}, E_{g}^{2 d})

, whose energetic width allows the prediction of the operational parameters of semiconductor-based devices in advance. Therefore, the determination of

E_{g}^{3 d}

and

E_{g}^{2 d}

(in cases where the band gap of newly synthesized materials is not known) is considered one of the primary tasks in semiconductor heterostructure technology. Furthermore, another important feature of

E_{g}

is its strong sensitivity to external influences. Indeed, variations in

E_{g}

resulting from such effects can fundamentally alter the physical and chemical properties of semiconductor devices.

体维和低维半导体结构的基本物理参数是带隙Eg3d，Eg2d，其能带宽度允许提前预测半导体器件的工作参数。因此，确定eg3和Eg2d（在新合成材料带隙未知的情况下）被认为是半导体异质结构技术的主要任务之一。此外，Eg的另一个重要特征是对外界影响的强烈敏感性。事实上，由这种效应引起的Eg的变化可以从根本上改变半导体器件的物理和化学性质。

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引用次数: 0