Materials Today Nano最新文献_第5页

Horizontally aligned carbon nanotube-based rectenna for selective terahertz photodetection 用于选择性太赫兹光探测的水平对准碳纳米管整流天线

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

Materials Today Nano

Pub Date : 2025-11-05 DOI: 10.1016/j.mtnano.2025.100716

Husam AlTakroori , Sherif Elsayed , Ayman Rezk , Abdulrahman Agha , Dezhuang Ji , Anas AlAzzam , Lianxi Zheng , Ammar Nayfeh , Mohammad Khaled Shakfa , Baker Mohammad , Moh'd Rezeq

Rectenna devices have emerged as a promising technology for direct detection and rectification of infrared (IR) radiation due to their rapid response and wavelength selectivity. However, practical implementation remains challenging due to antenna dimension matching with incident wavelengths, integration with suitable diodes, and resonance shifts from dielectric and substrate loading. Here, these challenges are addressed by designing and fabricating an IR rectenna based on horizontally aligned multi-walled carbon nanotubes (HA-MWCNTs) that serve as antennas for selective terahertz (THz) photodetection. An optimized metal-insulator-semiconductor (MIS) diode was fabricated and integrated with HA-MWCNTs. The CNTs were then cut into lengths between 50 and 750 μm, corresponding to quarter-wavelength monopole antennas, to obtain a rectenna structure. The optimum photo-response was observed for CNT lengths of 100 μm and 200 μm at 0.3 THz (1 mm IR) and 0.15 THz (2 mm IR), respectively, accounting for a shortened effective wavelength caused by the surrounding dielectric environment. Structural characteristics were investigated through SEM and AFM imaging, while spectroscopic analyses (UV–Vis, Raman, XRD, XPS) confirmed material quality, purity, and crystallinity. This approach demonstrates the potential of fabricating selective rectenna photosensors tuned by CNT length, providing key insights into wavelength-sensitive IR detection and paving the way for next-generation THz sensing technologies.

整流天线装置由于其快速响应和波长选择性而成为一种有前途的直接检测和整流红外辐射的技术。然而，由于天线尺寸与入射波长匹配，与合适的二极管集成以及介电介质和衬底负载的共振偏移，实际实施仍然具有挑战性。本文通过设计和制造一种基于水平排列的多壁碳纳米管（HA-MWCNTs）的红外整流天线来解决这些挑战，该天线可作为选择性太赫兹（THz）光探测的天线。制备了一种优化的金属绝缘体半导体（MIS）二极管，并与HA-MWCNTs集成。然后将CNTs切割成50 ~ 750 μm的长度，对应于四分之一波长单极天线，得到整流天线结构。在0.3太赫兹（1mm IR）和0.15太赫兹（2mm IR）下，当碳纳米管长度为100 μm和200 μm时，由于周围介电环境导致有效波长缩短，光响应最佳。通过扫描电镜（SEM）和原子力显微镜（AFM）成像研究了材料的结构特征，同时通过光谱分析（UV-Vis, Raman， XRD， XPS）证实了材料的质量、纯度和结晶度。这种方法展示了制造由碳纳米管长度调谐的选择性整流天线光传感器的潜力，为波长敏感红外探测提供了关键见解，并为下一代太赫兹传感技术铺平了道路。

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引用次数: 0

Calibrated annealing-directed reshaping of TiO2/Au semi-enclosed nanostructure for effective plasmonic hot carrier-mediated photoelectrocatalysis 用于有效等离子体热载子介导的光电催化的校准退火定向重塑TiO2/Au半封闭纳米结构

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

Materials Today Nano

Pub Date : 2025-11-04 DOI: 10.1016/j.mtnano.2025.100715

Jingjing Wang , Waqas Ahmad , Xingyu Lin

Plasmonic metal–support structures hold great promise for heterogeneous catalysis; however, the efficiency of such systems is often constrained by limited light-harvesting due to narrow-band absorption, complex synthesis procedures, and long-term stability. In the current work, a single-step, temperature-controlled calibrated annealing route has been proposed to yield hybrid titanium dioxide (TiO₂)/gold (Au) semi-enclosed nanostructures, comprising an Au nanoporous framework with embedded TiO₂. The embedded TiO₂ functions as a semi-enclosed structure, lengthening the light path to boost absorption, while the nanoporous sputtered Au supplies strong localized surface plasmon resonance, broadening the visible-light response and creating dense plasmonic hotspots that markedly increase hot-carrier generation. Systematic annealing consolidates the composite into a denser and coherent architecture that delivers over ∼80 % average absorption in the full spectrum range (300–800 nm) compared against pristine TiO₂, Ti/Au bilayer and Au film. The presence of ultra-compact, interconnected Au–TiO₂–H₂O interfaces facilitates effective charge separation and transfer, resulting in an incident photon-to-electron conversion efficiency of 0.29 % at 520 nm. The photoelectrocatalytic performance was validated through the degradation of malachite green and levofloxacin, demonstrating excellent catalytic efficiency and stability over multiple cycles. The proposed temperature-controlled fabrication method for TiO₂/Au nanostructure substrate lays a solid foundation for environmental and energy-related applications.

等离子体金属支撑结构在多相催化中具有很大的应用前景；然而，由于窄带吸收、复杂的合成过程和长期稳定性，这种系统的效率往往受到有限的光收集的限制。在目前的工作中，提出了一种单步温控校准退火路线，以产生混合二氧化钛(TiO2)/金（Au）半封闭纳米结构，包括嵌入TiO2的金纳米孔框架。嵌入的TiO2作为半封闭结构，延长了光路以促进吸收，而纳米孔溅射的Au提供了强的局部表面等离子体共振，拓宽了可见光响应，并产生了密集的等离子体热点，显著增加了热载流子的产生。与原始的TiO2、Ti/Au双分子层和Au薄膜相比，系统退火将复合材料固化成更致密和连贯的结构，在全光谱范围（300-800 nm）内提供超过80%的平均吸收率。超紧凑、互连的Au-TiO2-H2O界面的存在促进了有效的电荷分离和转移，导致520 nm入射光子到电子的转换效率为0.29%。通过对孔雀石绿和左氧氟沙星的降解，验证了其光电催化性能，在多次循环中表现出优异的催化效率和稳定性。本文提出的温度控制制备TiO2/Au纳米结构衬底的方法为环境和能源相关的应用奠定了坚实的基础。

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引用次数: 0

MXene-based electrochemical glucose biosensors: Comparative enhancement with Aquivion and Nafion 基于mxene的电化学葡萄糖生物传感器：与aquvion和Nafion的比较增强

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

Materials Today Nano

Pub Date : 2025-10-31 DOI: 10.1016/j.mtnano.2025.100712

Anton Popov , Viktorija Lisyte , Marina Sapauskiene , Simonas Ramanavicius , Sarunas Zukauskas , Nora Slekiene , Ivan Baginskiy , Veronika Zahorodna , Oleksiy Gogotsi , Asta Kausaite-Minkstimiene , Almira Ramanaviciene

Unlike many reported studies focusing on MXene-based nanocomposites, this work demonstrates the potential of pristine Ti₃C₂T_x as an electrode modifier for glucose biosensing. The surface of the graphite rod electrode was modified by pristine Ti₃C₂T_x MXenes, followed by the deposition of glucose oxidase and crosslinking via glutaraldehyde vapor to enhance the electrochemical performance of the biosensor. Among the redox mediators tested, phenazine methosulfate provided the best electron transfer and proved most suitable for MXene-based glucose biosensors. To address the issue of incomplete electrode coverage by MXenes and surface instability, Nafion and Aquivion were introduced as ionomer binders, which significantly improved MXene layer adhesion, morphology, and electroactive surface area. The resulting biosensors prepared with 0.05 % Aquivion and 0.01 % Nafion exhibited a practically relevant linear range (0.1–5 mM), low limits of detection (23 μM and 48 μM), high sensitivities (97.5 and 88.9 μA mM⁻¹ cm⁻²), and low relative standard deviations (5.1 and 3.8 % for repeatability, <7.9 % for reproducibility). Importantly, the practical applicability of the developed biosensors was confirmed by the successful determination of glucose in human serum samples.

与许多报道的专注于mxene纳米复合材料的研究不同，这项工作证明了原始Ti3C2Tx作为葡萄糖生物传感电极修饰剂的潜力。用原始Ti3C2Tx MXenes修饰石墨棒电极表面，然后沉积葡萄糖氧化酶并通过戊二醛蒸汽交联来提高生物传感器的电化学性能。在所测试的氧化还原介质中，苯那嗪甲硫代硫酸盐提供了最好的电子传递，并被证明最适合用于基于mxene的葡萄糖生物传感器。为了解决MXene电极覆盖不完全和表面不稳定的问题，引入了Nafion和aquvion作为离子结合剂，显著改善了MXene层的附着力、形貌和电活性表面积。用0.05% aquvion和0.01% Nafion制备的生物传感器具有良好的线性范围（0.1-5 mM）、低检测限（23 μM和48 μM）、高灵敏度（97.5和88.9 μA mM−1 cm−2）和低相对标准偏差（重复性为5.1%和3.8%，再现性为7.9%）。重要的是，开发的生物传感器的实际适用性通过成功测定人血清样品中的葡萄糖得到了证实。

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引用次数: 0

Self-cleaning and anti-counterfeiting structural color coating based on fluorescent SiO2@PPy@CQDs microspheres 基于荧光SiO2@PPy@CQDs微球的自洁防伪结构彩色涂料

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

Materials Today Nano

Pub Date : 2025-10-31 DOI: 10.1016/j.mtnano.2025.100711

Yinchun Fang , Xianglu Zhao , Xuchen Tao

Photonic crystals (PCs) structural color coatings have been widely studied due to their advantages of environmental friendliness, resistance to fading and high color saturation. However, they still have problems such as single function and being easily affected by the external environment. In this research, fluorescent SiO₂@polypyrrole@carbon quantum dots (SiO₂@PPy@CQDs) microspheres were synthesized by incorporating CQDs into SiO₂@PPy microspheres, which were self-assembled on the white cotton fabrics to form an amorphous photonic structure (APS). These APS exhibited angle-independent structural colors under natural light and blue fluorescence under UV light. The structural colored cotton fabrics obtained superhydrophobicity with a water contact angle (WCA) greater than 150° and self-cleaning function after treatment with polydimethylsiloxane (PDMS). The anti-counterfeiting structural colored fabrics with single response to UV light and dual responses to water/UV light based on SiO₂@PPy@CQDs, SiO₂@PPy and SiO₂ microspheres were prepared by using multi-layer alternating atomization deposition and PDMS hydrophobic treatment processes. This study provides a novel approach for developing multifunctional structural color coatings with self-cleaning and anti-counterfeiting based on fluorescent organic/inorganic hybrid microspheres.

光子晶体结构彩色涂料以其环保、耐褪色、色彩饱和度高等优点得到了广泛的研究。但仍存在功能单一、易受外部环境影响等问题。在本研究中，将碳量子点（SiO2@PPy@CQDs）掺入SiO2@PPy微球中，合成了荧光SiO2@polypyrrole@碳量子点（SiO2@PPy@CQDs）微球，并将其自组装在白色棉织物上形成非晶光子结构（APS）。这些APS在自然光下表现出与角度无关的结构色，在紫外光下表现出蓝色荧光。经聚二甲基硅氧烷（PDMS）处理后，获得了水接触角（WCA）大于150°的超疏水性和自清洁功能。采用多层交替雾化沉积和PDMS疏水处理工艺，制备了基于SiO2@PPy@CQDs、SiO2@PPy和SiO2微球的单紫外光响应、双水/紫外光响应的彩色防伪结构织物。本研究为开发基于荧光有机/无机杂化微球的多功能自洁防伪结构彩色涂料提供了新途径。

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引用次数: 0

Dual roles of stepped surfaces: Catalytic initiators and stabilizers of oxygen-induced reconstructions 阶梯表面的双重作用：氧诱导重建的催化引发剂和稳定剂

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

Materials Today Nano

Pub Date : 2025-10-31 DOI: 10.1016/j.mtnano.2025.100714

Zhilu Liang , Shuonan Ye , Yupeng Wu , Zhikang Zhou , Xianhu Sun , Linna Qiao , Meng Li , Judith C. Yang , Guangwen Zhou

Understanding surface restructuring under reactive conditions is crucial for designing next-generation catalysts with enhanced activity and selectivity. Here, we employ in situ transmission electron microscopy to directly observe the dynamic behavior of Cu(100) and Cu(410) surfaces under both oxidizing and vacuum annealing conditions, revealing a complex interplay among surface crystallography, local oxygen coverage, Cu atom mobility, and step-edge reactivity. The stepped Cu(410) surface acts as an active site for O₂ dissociation, triggering the oscillatory transformation of the c(2 × 2)–O phase into the more stable (2

\sqrt{2}

×

\sqrt{2}

)R45°–O missing-row (MR) structure on the adjacent flat Cu(100) terrace. Under subsequent vacuum annealing, this same Cu(410) facet exhibits remarkable structural resilience, preserving the MR reconstruction and chemisorbed oxygen. In contrast, the Cu(100) surface undergoes reversible transitions from the MR structure back to the c(2 × 2)–O phase. These results highlight the critical role of surface morphology in directing both the formation and stability of oxygen-induced reconstructions, demonstrating that stepped surfaces serve dual roles as both catalytic initiators and structural stabilizers. This work offers atomic-level insights into the environment-responsive behavior of copper surfaces, establishing a mechanistic basis for designing Cu-based catalysts through facet-specific control of surface reactivity.

了解反应条件下的表面重组对于设计具有更高活性和选择性的下一代催化剂至关重要。在这里，我们使用原位透射电镜直接观察了Cu（100）和Cu（410）表面在氧化和真空退火条件下的动态行为，揭示了表面晶体学、局部氧覆盖率、Cu原子迁移率和阶梯边缘反应性之间复杂的相互作用。阶梯式Cu（410）表面作为O2解离的活性位点，触发c(2 × 2) -O相在相邻的平坦Cu（100）平台上振荡转变为更稳定的（22 × 2）R45°-O缺失行（MR）结构。在随后的真空退火下，相同的Cu（410）面显示出显著的结构弹性，保留了MR重建和化学吸收的氧。相反，Cu（100）表面经历了从MR结构到c(2 × 2) -O相的可逆转变。这些结果强调了表面形貌在指导氧诱导重建的形成和稳定性方面的关键作用，表明阶梯式表面具有催化引发剂和结构稳定剂的双重作用。这项工作为铜表面的环境响应行为提供了原子水平的见解，通过对表面反应性的特定方面控制，为设计铜基催化剂建立了机制基础。

{"title":"Dual roles of stepped surfaces: Catalytic initiators and stabilizers of oxygen-induced reconstructions","authors":"Zhilu Liang , Shuonan Ye , Yupeng Wu , Zhikang Zhou , Xianhu Sun , Linna Qiao , Meng Li , Judith C. Yang , Guangwen Zhou","doi":"10.1016/j.mtnano.2025.100714","DOIUrl":"10.1016/j.mtnano.2025.100714","url":null,"abstract":"<div><div>Understanding surface restructuring under reactive conditions is crucial for designing next-generation catalysts with enhanced activity and selectivity. Here, we employ in situ transmission electron microscopy to directly observe the dynamic behavior of Cu(100) and Cu(410) surfaces under both oxidizing and vacuum annealing conditions, revealing a complex interplay among surface crystallography, local oxygen coverage, Cu atom mobility, and step-edge reactivity. The stepped Cu(410) surface acts as an active site for O<sub>2</sub> dissociation, triggering the oscillatory transformation of the c(2 × 2)–O phase into the more stable (2 <span><math><mrow><msqrt><mn>2</mn></msqrt></mrow></math></span> × <span><math><mrow><msqrt><mn>2</mn></msqrt></mrow></math></span>)R45°–O missing-row (MR) structure on the adjacent flat Cu(100) terrace. Under subsequent vacuum annealing, this same Cu(410) facet exhibits remarkable structural resilience, preserving the MR reconstruction and chemisorbed oxygen. In contrast, the Cu(100) surface undergoes reversible transitions from the MR structure back to the c(2 × 2)–O phase. These results highlight the critical role of surface morphology in directing both the formation and stability of oxygen-induced reconstructions, demonstrating that stepped surfaces serve dual roles as both catalytic initiators and structural stabilizers. This work offers atomic-level insights into the environment-responsive behavior of copper surfaces, establishing a mechanistic basis for designing Cu-based catalysts through facet-specific control of surface reactivity.</div></div>","PeriodicalId":48517,"journal":{"name":"Materials Today Nano","volume":"32 ","pages":"Article 100714"},"PeriodicalIF":8.2,"publicationDate":"2025-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145474145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Regulating metal-support interface registration towards enhanced catalytic activity 调节金属支撑界面配准以提高催化活性

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

Materials Today Nano

Pub Date : 2025-10-30 DOI: 10.1016/j.mtnano.2025.100713

Yang Ou , Songda Li , Zhi Wang , Xiaoqiu Xu , Xiaoyun Guo , Qiaoli Chen , Tulai Sun , Yihan Zhu

Metal-support interaction (MSI) plays a critical role in modulating the catalytic activity of supported metal catalysts. However, a fundamental understanding of the underlying mechanisms, encompassing both electronic and geometric aspects, remains elusive, thereby limiting the formulation of effective strategies to regulate MSI. Here we propose in a Pt-TiO₂ metal-support catalytic system, to manipulate the atomic packing order of Pt nanoparticle and coordination number of surface exposed active sites, through the regulation of metal-support interface registration. Diverse types of exposed facets achieved by the polyhedral crystal shapes of TiO₂ support impose different degrees of metal-support interface registration, which dramatically alters the covalent bonding character between Pt and TiO₂ across the interface and prompting the restructuring of Pt nanoparticles. Among these, the (100) facet of TiO₂ facilitate nearly coherent registration between Pt (111) and TiO₂ (100) crystal planes, fostering strong metal-support covalent bonding. This interaction effectively maintains the close-packed structure of Pt nanoparticles while maximizing the exposure of active sites with a dense coordination number. In contrast, the larger lattice discrepancies at the (101) and (001) facets of TiO₂ lead to the restructuring of Pt nanoparticles, resulting in the exposure of loosely coordinated active sites. This regulation of MSI offers a novel pathway to enhance catalytic activity toward CO oxidation by creating active sites with tunable coordination environment, which is crucial for overcoming the trade-off between catalyst activation and poisoning effects.

金属-载体相互作用（MSI）在调节负载型金属催化剂的催化活性中起着关键作用。然而，对潜在机制的基本理解，包括电子和几何方面，仍然难以捉摸，从而限制了有效策略的制定来调节MSI。本文提出在Pt- tio2金属载体催化体系中，通过调节金属载体界面配位来调控Pt纳米粒子的原子排列顺序和表面暴露活性位的配位数。TiO2载体的多面体晶体形状所形成的不同类型的暴露面，使金属-载体界面发生了不同程度的配准，极大地改变了Pt与TiO2在界面上的共价键特性，促进了Pt纳米粒子的重构。其中，TiO2的（100）面促进了Pt（111）和TiO2（100）晶面之间的近相干配准，形成了强的金属支撑共价键。这种相互作用有效地保持了Pt纳米颗粒的紧密排列结构，同时最大限度地暴露了具有密集配位数的活性位点。相反，TiO2的（101）和（001）面较大的晶格差异导致Pt纳米颗粒的重组，导致松散协调的活性位点暴露。这种对MSI的调节提供了一种新的途径，通过创建具有可调配环境的活性位点来提高CO氧化的催化活性，这对于克服催化剂活化和中毒效应之间的权衡至关重要。

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引用次数: 0

Triboelectric enhancement via MnO2-coated graphite for self-powered smart entry systems 基于二氧化氮涂层石墨的摩擦电增强自供电智能入口系统

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

Materials Today Nano

Pub Date : 2025-10-28 DOI: 10.1016/j.mtnano.2025.100710

Gunasekhar Ramadasu , Insun Woo , Jae Uk Yoon , Prasad Gajula , Jin Woo Bae

The demand for battery-free, self-powered systems is rapidly increasing in smart homes and sustainable electronics, driven by advancements in triboelectric nanogenerators (TENGs). However, selecting suitable materials and fillers to enhance surface charge density and charge trapping remains challenging. Recent progress in surface modification of conductive fillers and their incorporation into triboelectric materials has improved device performance. In this study, MnO₂-coated graphite was synthesized via a one-step aqueous method and embedded into polydimethylsiloxane (PDMS) as the tribonegative layer to enhance device performance. The MnO₂-coated graphite significantly improved charge generation by enhancing electron affinity and dielectric properties. Incorporating 2 wt% MnO₂-coated graphite into PDMS yielded a maximum output voltage of 146 V, which is 2.3 times higher than unmodified graphite (61 V) and 3.7 times higher than pristine PDMS (39 V), demonstrating the effectiveness of MnO₂ modification in boosting triboelectric performance. Furthermore, the optimized device successfully powered low-power electronics and light-emitting diodes. Finally, a battery-free visual indication system for smart door movement was developed, utilizing energy harvested from the TENG. This system highlights the potential for sustainable, maintenance-free sensing solutions in real-world energy harvesting and self-powered Internet of Things applications.

由于摩擦纳米发电机（TENGs）的进步，智能家居和可持续电子产品对无电池、自供电系统的需求正在迅速增加。然而，选择合适的材料和填料来提高表面电荷密度和电荷捕获仍然是一个挑战。导电填料的表面改性及其在摩擦电材料中的应用的最新进展提高了器件的性能。本研究采用一步水法制备mno2包覆石墨，并将其作为摩擦负极层嵌入聚二甲基硅氧烷（PDMS）中，以提高器件性能。mno2包覆石墨通过增强电子亲和性和介电性能显著改善电荷生成。在PDMS中加入2 wt%的MnO2涂层石墨，产生的最大输出电压为146 V，比未改性的石墨（61 V）高2.3倍，比原始PDMS （39 V）高3.7倍，证明了MnO2改性在提高摩擦电性能方面的有效性。此外，优化后的器件成功地为低功耗电子器件和发光二极管供电。最后，开发了一个无电池的智能门运动视觉指示系统，利用从TENG收集的能量。该系统强调了在现实世界的能量收集和自供电物联网应用中可持续、免维护的传感解决方案的潜力。

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引用次数: 0

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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