Materials Today Nano最新文献_第8页

Flexible high-performance electromagnetic interference shielding AF/MXene/AgNWs based fabrics with multiple functions and enhanced environmental stability 柔性高性能电磁干扰屏蔽AF/MXene/AgNWs织物，具有多种功能和增强的环境稳定性

IF 8.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Nano

Pub Date : 2025-10-26 DOI: 10.1016/j.mtnano.2025.100702

Shuangshuang Liu , Yinghao Liu , Xiangnan Wang , Bo Wang , Sijie Guo , Xue Bai , Jian Tian , Nannan Wu , Jiurong Liu

The rapid evolution of wireless technologies has intensified electromagnetic (EM) pollution, promoting the application of advanced multifunctional shielding materials. Herein, we developed aramid fiber (AF) based composite fabrics by sequentially loading Ti₃C₂T_x MXene nanosheets and silver nanowires (AgNWs) onto fabric substrates. The optimized AF/MXene/AgNWs structure exhibits exceptional electromagnetic interference (EMI) shielding effectiveness of 63.93–96.75 dB in the X-band, coupled with superior shielding efficiency (SSE/t) of 3995–5183.03 dB cm² g⁻¹ at a thickness of 0.34 mm. This performance stems from synergistic conductive networks formed by MXene and AgNWs, enabling multi-scale EM wave attenuation through reflection, ohmic loss, and interfacial polarization. Beyond EMI shielding, the composite demonstrates integrated multifunctionality including infrared stealth capability, rapid electrothermal response, precise photothermal regulation, antibacterial efficacy, and flame retardancy. The encapsulation of polydimethylsiloxane (PDMS) further ensures environmental stability, and the fabrics maintained 94.3 % EMI shielding (48.93 dB) after 30 days of oxidation. The EMI shielding efficiency was maintained at 47.98 dB after salt-spray corrosion for 48 h. With excellent mechanical flexibility, this multifunctional fabric presents significant potential for next-generation wearable electronics, medical thermal therapy systems, and aerospace applications.

无线技术的快速发展加剧了电磁污染，促进了先进多功能屏蔽材料的应用。在此，我们通过将Ti3C2Tx MXene纳米片和银纳米线（AgNWs）依次加载到织物衬底上，开发了芳纶纤维（AF）基复合织物。优化后的AF/MXene/AgNWs结构在x波段具有63.93 ~ 96.75 dB的电磁干扰屏蔽效果，在0.34 mm厚度处具有3995 ~ 5183.03 dB cm2 g−1的屏蔽效率（SSE/t）。这种性能源于MXene和AgNWs形成的协同导电网络，通过反射、欧姆损耗和界面极化实现多尺度电磁波衰减。除了EMI屏蔽外，该复合材料还展示了集成的多功能，包括红外隐身能力、快速电热响应、精确光热调节、抗菌功效和阻燃性。聚二甲基硅氧烷（PDMS）的封装进一步确保了环境稳定性，织物在氧化30天后保持了94.3%的EMI屏蔽（48.93 dB）。盐雾腐蚀48小时后，EMI屏蔽效率保持在47.98 dB。这种多功能织物具有出色的机械灵活性，在下一代可穿戴电子产品、医疗热治疗系统和航空航天应用中具有巨大的潜力。

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引用次数: 0

Advances in the construction of super-wetting surfaces and their application in the glass industry 超湿润表面的构造及其在玻璃工业中的应用进展

IF 8.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Nano

Pub Date : 2025-10-25 DOI: 10.1016/j.mtnano.2025.100703

Jinlei Wang , Zhiping Gan , Xin Cao , Jingyuan Chu , Gang Li , Shuyong Chen , Dengfeng Yang , Tian Bao , Chang Liu , Shou Peng

Surface modification of materials has consistently remained a pivotal research focus in materials science, particularly in the realm of wettability alteration, which enables the acquisition of unique surface properties not inherent to the bulk material. This paper presents a comprehensive analysis of the critical role of super-wetting modification in the glass industry, with specific emphasis on addressing current industrial requirements and advancing technological applications. The concept and the establishment of related theories or models of super-wetting are introduced. The development process of super-wetting research is summarized which starts from imitating nature and ends up solving the practical needs of the application. It focuses on the research progress of super-wetting in several directions, such as anti-fog and anti-dust in glass, which are most widely used in the application market and have the most urgent application needs. The development directions, existing problems, and the industry's requirements for performance indicators are summarized. Finally, the field of super-wetting glass is addressed with suggestions on key research directions and performance indexes.

材料的表面改性一直是材料科学的关键研究焦点，特别是在润湿性改变领域，它可以获得非块材料固有的独特表面特性。本文全面分析了超湿改性在玻璃工业中的关键作用，特别强调了解决当前工业需求和推进技术应用。介绍了超润湿的概念及其相关理论或模型的建立。总结了超润湿研究从模仿自然到解决实际应用需求的发展历程。重点介绍了应用市场上应用最广泛、应用需求最迫切的玻璃防雾、防尘等几个方向的超润湿技术的研究进展。总结了发展方向、存在的问题以及行业对绩效指标的要求。最后，对超润湿玻璃领域进行了展望，提出了重点研究方向和性能指标。

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引用次数: 0

Thermo-plasmonic properties of gold nanoparticles embedded PVDF films: Robust platform for nanoscale heat generation 嵌入PVDF薄膜的金纳米颗粒的热等离子体特性：纳米级热生成的强大平台

IF 8.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Nano

Pub Date : 2025-10-25 DOI: 10.1016/j.mtnano.2025.100708

Gaurav Jalendra , Suraj Tamta , Raishma Krishnan , Pandian Senthil Kumar

The incorporation of gold nanoparticles into a polymer matrix synergistically blends the host-guest properties, thus enabling enhanced applications in diverse biomedical, chemical and energy related research fields. In general, metal nanoparticles along with their unique plasmonic properties, demonstrate robust size/shape dependent (a)symmetric nearest neighbour interaction, resulting in the formation of coupled plasmonic hot spots, that forms the essential components for wide range of thermo-plasmonic applications. This present study utilizes a highly non-reactive, thermal/chemical resistant non-polar fluoropolymer, poly vinylidene fluoride (PVDF), which when embedded with Au nanoparticles form a thin, flexible nano-composite film with concentration dependent inter-particle distance, crucial for inducing/generating nanoscale thermal energy upon optical initiation with power/energy tunable laser sources. Both the PVDF host and metal guest matrix are carefully monitored using an indigenous IR thermal camera for their respective instantaneous variation of temperature. Such comprehensive procedure is carried out with various shapes of Au nanoparticles (spheres, nanorods and nanostars), which were already well characterized using microscopic and analytical spectroscopic techniques. Additionally, the coupling effect is corroborated using FDTD based HEAT simulations, concurrently revealing not only the consistency between experimental and theoretical results, but also evidently suggesting plausible nano thermodynamic mechanisms in tune with the nano-optics.

将金纳米颗粒掺入聚合物基质中，协同混合主客体特性，从而增强了在各种生物医学、化学和能源相关研究领域的应用。一般来说，金属纳米颗粒及其独特的等离子体特性，显示出强大的尺寸/形状依赖(a)对称的近邻相互作用，导致耦合等离子体热点的形成，形成了广泛的热等离子体应用的基本组成部分。本研究利用了一种高度非反应性、耐热/耐化学性的非极性含氟聚合物聚偏氟乙烯（PVDF），当它与金纳米颗粒嵌入时，形成一层薄的、柔性的纳米复合薄膜，其颗粒间距离与浓度有关，这对于通过功率/能量可调激光源在光学引发时诱导/产生纳米级热能至关重要。使用国产红外热像仪仔细监测PVDF主体和金属客体矩阵各自的瞬时温度变化。这种综合的过程是用各种形状的金纳米颗粒（球体、纳米棒和纳米星）进行的，这些纳米颗粒已经用显微镜和分析光谱技术进行了很好的表征。此外，利用基于时域有限差分（FDTD）的HEAT模拟证实了耦合效应，同时揭示了实验结果与理论结果的一致性，并且明显地提出了与纳米光学一致的合理的纳米热力学机制。

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引用次数: 0

Facile synthesis of pine needle-derived carbon/CoFe2/CoFe2O4 composites with precisely tunable microwave attenuation efficiency 微波衰减效率可精确调节的松针碳/CoFe2/CoFe2O4复合材料的快速合成

IF 8.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Nano

Pub Date : 2025-10-25 DOI: 10.1016/j.mtnano.2025.100707

Xiaoli Ji, Yuchao Deng, Zhihao Xu, Fan Chen

Ideal absorption materials require a combination of lightweight characteristics, strong electromagnetic dissipation, wide effective bandwidth, and thin thickness. Biomass charcoal, as a green, inexpensive, and lightweight dielectric loss material, has become a prominent research focus in microwave absorption technology. However, it faces challenges such as limited magnetic dissipation capacity and suboptimal impedance matching characteristics, which need to be addressed. In this study, PNBC/CoFe₂/CoFe₂O₄ composites were synthesized by combining pine needle biomass-derived carbon (PNBC) with cobalt ferrite through hydrothermal and high-temperature calcination methods. The results indicate that varying the amounts of introduced Co and Fe can precisely modulate the material's microwave attenuation efficiency. Specifically, when the mass ratio of pine needles: Fe: Co is 1.5:1.414:0.509, the minimum reflection loss (RLmin) of the material reaches −52.21 dB at 15.58 GHz, with a matching thickness of 1.44 mm and an effective absorption bandwidth (EABmax) of 4.32 GHz. This renders the material a simple and ideal wave-absorbing solution, demonstrating significant potential for practical applications.

理想的吸波材料要求具有重量轻、电磁耗散强、有效带宽宽、厚度薄等特点。生物质炭作为一种绿色、廉价、轻质的介质损耗材料，已成为微波吸收技术的研究热点。然而，它面临着诸如有限的磁耗散能力和不理想的阻抗匹配特性等挑战，需要解决这些问题。本研究将松针生物质衍生碳（PNBC）与钴铁氧体通过水热和高温煅烧的方法结合，合成了PNBC/CoFe2/CoFe2O4复合材料。结果表明，改变Co和Fe的引入量可以精确地调节材料的微波衰减效率。其中，当松针：Fe: Co的质量比为1.5:1.414:0.509时，材料在15.58 GHz处的最小反射损耗（RLmin）达到−52.21 dB，匹配厚度为1.44 mm，有效吸收带宽（EABmax）为4.32 GHz。这使得该材料成为一种简单而理想的吸波解决方案，显示出实际应用的巨大潜力。

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引用次数: 0

Study on the conformational transformation and biocompatibility of mixed valence MOFs as micro arc oxidation treated binder jetting printed titanium alloy implant coatings 混合价mof作为微弧氧化处理粘结剂喷射打印钛合金种植体涂层的构象转变及生物相容性研究

IF 8.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Nano

Pub Date : 2025-10-24 DOI: 10.1016/j.mtnano.2025.100709

Xinglin He , Xia Luo , Zhaoyubo Zeng , Huawei Cai , Lehui OuYang , Ruicheng Liu , Bensheng Huang , Zhou Fan , Kurapova Olga Yu , Vladimir Gennadievich Konakov

Currently, Selective Laser Melted (SLM) titanium alloys can meet the demands of personalized medical devices, but their poor surface roughness results in suboptimal surface biocompatibility. A low cost, high-efficiency 3D printing method, binder jetting additive manufacturing (BJAM), effectively address this issue. Furthermore, the application of bioactive coating on the BJAM-ed titanium alloy implants can enhance their surface bioinertness. This study synthesized Mn-MOFs via a solvothermal method, and then investigated the effects of synthesis temperature on the morphology, structure, and cyto-toxicity of Mn-BTC. Finally, the Mn-BTC with the best biocompatibility were coated on the BJAM-ed TC4 implant. The results indicate that Mn³⁺ was gradually reduced to Mn²⁺ by the thermodynamic driving forces, prompting a morphological transition of Mn-BTC from asymmetric polyhedrons to uniform spheres. This valence-morphology synergy significantly reduces the cytotoxicity of Mn-BTC synthesized at 170 °C. Subsequently, the 170 °C-synthesized Mn-BTC was coated on the BJAM-TC4 titanium alloy implants via micro-arc oxidation (MAO) to fabricate a Mn-BTC/MAO-TC4 coating. This coating not only effectively improves the RGR (increase by 12.1 %) compared to BJAM-TC4 but also significantly promotes BMSC adhesion performance. This study unveils the structure-activity relationship between temperature and morphology in Mn-BTC, providing a novel strategy for the surface functionalization of BJAM titanium alloy implants.

目前，选择性激光熔化（SLM）钛合金可以满足个性化医疗器械的需求，但其表面粗糙度差导致其表面生物相容性不理想。一种低成本、高效率的3D打印方法——粘结剂喷射增材制造（BJAM），有效地解决了这一问题。此外，生物活性涂层在BJAM-ed钛合金植入体上的应用可以提高其表面生物惰性。本研究采用溶剂热法合成了mn - mof，并研究了合成温度对Mn-BTC的形态、结构和细胞毒性的影响。最后将生物相容性最佳的Mn-BTC包被在BJAM-ed TC4种植体上。结果表明：在热力学驱动力作用下，Mn3+逐渐还原为Mn2+，促使Mn-BTC由不对称多面体向均匀球体形态转变；这种价态协同作用显著降低了在170℃下合成的Mn-BTC的细胞毒性。随后，将170℃合成的Mn-BTC通过微弧氧化（MAO）涂覆在BJAM-TC4钛合金植入体上，制备Mn-BTC/MAO- tc4涂层。与BJAM-TC4相比，该涂层不仅有效地提高了RGR（提高了12.1%），而且显著提高了BMSC的粘附性能。本研究揭示了Mn-BTC中温度与形貌的构效关系，为BJAM钛合金植入体的表面功能化提供了一种新的策略。

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引用次数: 0

Expanding the interlayer spacing of MXene through nanoarchitecture design 通过纳米结构设计扩大MXene的层间距

IF 8.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Nano

Pub Date : 2025-10-22 DOI: 10.1016/j.mtnano.2025.100704

Shanna Marie M. Alonzo, Bishnu Prasad Bastakoti

MXenes, a diverse class of two-dimensional transition metal carbides and nitrides with distinct surface chemistries, offer remarkable electrochemical and physicochemical properties. Yet, their performance can be hindered by the intrinsic restacking of layers, which restricts surface activity. This review outlines recent advances in interlayer spacing modulation strategies designed to overcome this limitation. A wide range of guest species–including mono- and polyatomic ions, small molecules, low-dimensional nanomaterials, and polymers–are discussed with respect to their intercalation mechanisms, structural effects, and capacity to introduce functional enhancements. These intercalating species interact with MXene via electrostatic forces, hydrogen bonding, redox reactions, or covalent linkages, resulting in stable, expanded nanoarchitectures. The influence of expanded spacing on capacitive behavior is briefly highlighted to illustrate its practical relevance. Although Ti₃C₂T_x is currently the most extensively investigated MXene, applying these interlayer engineering strategies to other MXene compositions will be essential for accessing a wider range of properties and functionalities.

MXenes是一种具有不同表面化学性质的二维过渡金属碳化物和氮化物，具有卓越的电化学和物理化学性能。然而，它们的性能可能会受到层的内在重新堆积的阻碍，这限制了表面活性。这篇综述概述了为了克服这一限制而设计的层间间隔调制策略的最新进展。广泛的客体物质——包括单原子和多原子离子、小分子、低维纳米材料和聚合物——讨论了它们的插层机制、结构效应和引入功能增强的能力。这些插入物通过静电力、氢键、氧化还原反应或共价键与MXene相互作用，产生稳定、扩展的纳米结构。本文简要地强调了扩大间距对电容行为的影响，以说明其实际意义。虽然Ti3C2Tx是目前研究最广泛的MXene，但将这些层间工程策略应用于其他MXene组合对于访问更广泛的属性和功能将是必不可少的。

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引用次数: 0

MXene-substrate adhesion - Towards more efficient and durable coatings mxene -基材附着力-迈向更高效和耐用的涂层

IF 8.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Nano

Pub Date : 2025-10-22 DOI: 10.1016/j.mtnano.2025.100705

Edoardo Marquis , Daniela Lizama , Rodrigo Espinoza-Gonzalez , Andreas Rosenkranz , Maria Clelia Righi

MXenes have emerged as promising solid lubricants due to their two-dimensional (2D) nature and tunable composition. However, their usage in technological applications is often hindered by a poor adhesion to substrates and peel-off during sliding, especially under high contact stress. In this contribution, we combine density functional theory (DFT) simulations and ball-on-flat tribological experiments to elucidate how adhesion to the underlying substrate governs the performance of multi-layer Ti₃C₂T_x coatings. The results reveal a clear correlation between the computationally predicted adhesion strength on different substrates, namely Fe, Fe₂O₃, Si, SiO₂, and the effective tribological performance: MXene coatings on steel substrate maintaining their native oxide scale demonstrated an enhanced durability and friction reduction, while coatings on Si wafers rapidly exfoliate due to poor interfacial adhesion. Finally, we present an effective strategy to improve the adhesion of Ti₃C₂T_x on silicon, exploring the doping of Si with boron and phosphorus. DFT calculations demonstrate that doping enhances adhesion by altering the electron distribution exposed by surface, especially in case of boron. Our findings underscore the critical role of substrate adhesion and provide design strategies to boost the applicability of MXenes in lubrication technologies.

由于其二维（2D）性质和可调的成分，MXenes已成为有前途的固体润滑剂。然而，它们在技术应用中的使用往往受到与基材粘附性差和滑动时剥落的阻碍，特别是在高接触应力下。在这篇论文中，我们结合密度泛函理论（DFT）模拟和球-平面摩擦学实验来阐明与底层衬底的粘附如何影响多层Ti3C2Tx涂层的性能。结果表明，计算预测的Fe、Fe2O3、Si、SiO2在不同基体上的粘附强度与有效摩擦学性能之间存在明显的相关性：钢基体上的MXene涂层保持其天然氧化层，表现出增强的耐久性和摩擦减少，而Si晶片上的涂层由于界面粘附性差而迅速脱落。最后，我们提出了一种有效的策略来提高Ti3C2Tx在硅上的附着力，探索了硅与硼和磷的掺杂。DFT计算表明，掺杂通过改变表面暴露的电子分布来增强附着力，尤其是硼。我们的研究结果强调了衬底粘附的关键作用，并提供了提高MXenes在润滑技术中的适用性的设计策略。

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引用次数: 0

Interface-driven performance boost in NbOx/V2O5 bilayer memristors for next-generation neuromorphic systems 用于下一代神经形态系统的NbOx/V2O5双层记忆电阻器的接口驱动性能提升

IF 8.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Nano

Pub Date : 2025-10-22 DOI: 10.1016/j.mtnano.2025.100706

Muneeb Ahmad , Honggyun Kim , Ibtisam Ahmad , Hammad Ghazanfar , Faisal Ghafoor , Jamal Aziz , Muhammad Rabeel , Muhammad Farooq Khan , Myoung-Jae Lee , Ghulam Dastgeer , Deok-kee Kim

The advancement of bilayer memristor devices is crucial for enhancing performance and enabling multifunctionality in next-generation memory technologies for neuromorphic applications. Here, we present an optimized fabrication and characterization of Resistive Random-Access Memory (RRAM) devices composed of a NbO_x/V₂O₅ bilayer structure. By systematically varying the thickness of the V₂O₅ layer while maintaining a constant NbO_x thickness of less than 14 nm, we achieved a significant enhancement in device performance. Our optimized bilayer device with a 60 nm thick V₂O₅ layer exhibited an on/off current ratio of 10⁶, achieving a four-order-of-magnitude improvement over single-layer NbO_x devices while maintaining the same set voltage. Additionally, this bilayer structure demonstrated endurance over 10³ DC cycles and retention exceeding 10⁴ s. Comprehensive material analysis using HRTEM, EDX, and XPS with depth profile confirmed the precise composition and structural integrity of the devices. Furthermore, neuromorphic pulse measurements revealed synaptic-like behavior, underscoring the potential of the NbO_x/V₂O₅ bilayer structure for integration into neuromorphic computing systems. This behavior was further applied for MNIST dataset based digit recognition to obtain an average recognition accuracy of 97.69 %. These findings not only advance the state-of-the-art in RRAM technology but also open new avenues for its application in next-generation computing architectures.

双层记忆电阻器器件的进步对于提高下一代神经形态存储技术的性能和实现多功能至关重要。在这里，我们提出了一种由NbOx/V2O5双层结构组成的电阻式随机存取存储器（RRAM）器件的优化制造和表征。通过系统地改变V2O5层的厚度，同时保持NbOx厚度小于14 nm，我们实现了器件性能的显著增强。我们优化的双层器件具有60 nm厚的V2O5层，其开关电流比为106，在保持相同设置电压的情况下，比单层NbOx器件提高了4个数量级。此外，这种双层结构表现出超过103直流循环的耐久性和超过104秒的保留率。利用HRTEM、EDX和XPS对材料进行综合分析，确定了器件的精确组成和结构完整性。此外，神经形态脉冲测量揭示了突触样行为，强调了NbOx/V2O5双层结构集成到神经形态计算系统中的潜力。将此行为进一步应用于基于MNIST数据集的数字识别，平均识别准确率达到97.69%。这些发现不仅推动了RRAM技术的发展，而且为其在下一代计算架构中的应用开辟了新的途径。

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引用次数: 0

Emulating synaptic plasticity in a solution processed Ag-metalized oxide memristor for high-accuracy neuromorphic computing 在溶液加工银金属化氧化物忆阻器中模拟突触可塑性，用于高精度神经形态计算

IF 8.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Nano

Pub Date : 2025-10-19 DOI: 10.1016/j.mtnano.2025.100699

Subarna Pramanik , Rajarshi Chakraborty , Sobhan Hazra , Sandeep Dahiya , Souvik Jana , Biswarup Satpati , Bhola Nath Pal

A metal oxide-based memristor device with enhanced bipolar switching and memory retention has been developed via a solution-processed Ag(Ag⁺)-TiO₂ thin film, made from Li₄Ti₅O₁₂ through Ag ion-exchange and subsequent reduction. By utilizing the plasmonic effect of Ag, the device has been used in advanced neurocomputing applications. To improve the switching performance, Ag(Ag⁺)-TiO₂ thin film has been grown on SnO₂ thin film, where metallic and oxygen-defect conducting filaments from those respective layers are connected to each other to form a continuous conducting path between electrodes. A gold electrode of thickness 12 nm is used on top of the p⁺-Si/SnO₂/Ag(Ag⁺)-TiO₂ structure for dual purposes, as electrode and as light window. The device exhibits reversible resistive switching behavior with 750 consecutive cycles with minimal variation. Moreover, it executes a low resistance state (LRS) to high resistance state (HRS) ratio >10⁴ with a data retention capability of approximately 8 × 10⁴ s with an on/off ratio of ∼10⁵. The device can also mimic long-term plasticity using optical stimuli, where potentiation and depression events have been emulated with cyclic positive and negative I-V sweeps, respectively. The extracted data are utilized for image reorganization using an artificial neural network model, achieving a training accuracy of ∼94 %.

以Li4Ti5O12为原料，通过Ag离子交换和随后的还原制备了溶液处理Ag(Ag+)-TiO2薄膜，开发了一种具有增强双极开关和记忆保留功能的金属氧化物基忆阻器器件。利用银的等离子体效应，该装置已被用于高级神经计算应用。为了提高开关性能，在SnO2薄膜上生长Ag(Ag+)-TiO2薄膜，将各层的金属导电丝和氧缺陷导电丝相互连接，在电极之间形成连续的导电路径。在p+-Si/SnO2/Ag(Ag+)-TiO2结构的顶部采用厚度为12 nm的金电极，具有电极和光窗双重作用。该器件在750个连续循环中表现出可逆的电阻开关行为，变化最小。此外，它执行低电阻状态（LRS）到高电阻状态（HRS）比>；104，数据保留能力约为8 × 104 s，开/关比为~ 105。该装置还可以使用光学刺激模拟长期可塑性，其中增强和抑制事件分别通过循环正I-V扫描模拟。使用人工神经网络模型将提取的数据用于图像重组，训练精度达到94%。

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引用次数: 0

UV-irradiation-driven breakdown threshold reduction for enhanced TENG output 紫外线辐射驱动的击穿阈值降低，增强了TENG输出

IF 8.2 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Today Nano

Pub Date : 2025-10-18 DOI: 10.1016/j.mtnano.2025.100701

CongCong Hao , Mingzhe Cai , ZeKun Wang , Shuaining Cheng , Zhongxin Wang , Taimin Reng , Siyu Chen , Cong Zhai , Xingcheng Han , Yue Tang , YongQiu Zheng , ChenYang Xue

Addressing the critical challenge of low energy output in triboelectric nanogenerators (TENGs) for sustainable IoT power, this work presents a strategy to enhance TENG performance by reducing the air breakdown threshold at needle tips via ultraviolet (UV) light irradiation. A rotating TENG (RTENG) incorporating an optimized needle-tip structure is introduced. Experimental optimization revealed that a 100 μm needle gap maximized voltage conversion ratio. Further refinement of the needle circuit parameters achieved a peak efficiency of 6.38 %, representing a 19.33-fold increase over direct rectified RTENG output. However, close-proximity discharge induced significant heat, causing tip melting and efficiency degradation. To overcome this challenge, UV irradiation was innovatively applied to the needle tips. This irradiation ionizes ambient nitrogen and oxygen gases, significantly lowering the breakdown voltage threshold required for discharge. This approach effectively mitigates corona-induced tip melting and wear, sustaining performance after tens of thousands of discharge cycles, thereby enhancing output efficiency and extending operational lifespan. Concurrently, an efficient multimodal power management strategy implemented with the LTC-3588 chip enables stable power delivery to diverse electronic components under irregular mechanical energy input by integrating energy storage and adaptive voltage regulation. Collectively, innovations including UV-enabled discharge threshold reduction and advanced power management achieve low-loss energy storage and voltage-converted output. This facilitates practical applications, demonstrated here by enabling RTENG-powered green hydrogen production. The work significantly advances high-efficiency, durable TENG systems for self-powered electronics.

为了解决摩擦电纳米发电机（TENG）在可持续物联网供电方面的低能量输出这一关键挑战，本研究提出了一种通过紫外线（UV）光照射降低针尖处空气击穿阈值来提高TENG性能的策略。介绍了一种采用优化针尖结构的旋转式陀螺（RTENG）。实验优化表明，当针隙为100 μm时，电压转换率最大。针电路参数的进一步细化实现了6.38%的峰值效率，比直接整流RTENG输出增加了19.33倍。然而，近距离放电会产生大量热量，导致尖端熔化和效率下降。为了克服这一挑战，创新地将紫外线照射应用于针尖。这种辐照使周围的氮气和氧气电离，大大降低了放电所需的击穿电压阈值。这种方法有效地减轻了电晕引起的尖端熔化和磨损，在数万次放电循环后保持性能，从而提高了输出效率并延长了使用寿命。同时，LTC-3588芯片实现了高效的多模态电源管理策略，通过集成能量存储和自适应电压调节，可以在不规则机械能输入下稳定地向各种电子元件供电。总的来说，包括降低紫外线放电阈值和先进的电源管理在内的创新实现了低损耗的能量存储和电压转换输出。这有助于实际应用，这里通过启用rteng驱动的绿色氢气生产来演示。这项工作显著推进了用于自供电电子设备的高效、耐用的TENG系统。

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引用次数: 0