Nanoscale最新文献_第3页

Sliding ferroelectricity and ferroelectric–valley coupling in Janus RuXY (X, Y = Cl, Br, I) bilayers Janus RuXY （X, Y = Cl, Br， I）双分子层的滑动铁电和铁电-谷耦合

IF 6.7 3区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nanoscale

Pub Date : 2026-02-06 DOI: 10.1039/d5nr04816h

Shuisheng Yi, Peiyao Chen, Yumin Liao, Xumin Chen, Dexuan Huo

Two-dimensional Janus transition-metal dihalides RuXY (X, Y = Cl, Br, I) constitute a class of van der Waals multiferroic materials with the coexistence of sliding ferroelectricity and interlayer antiferromagnetism. Here, we report the sliding ferroelectricity and ferroelectric-valley coupling in Janus RuXY bilayers based on first-principles calculations. The out-of-plane ferroelectric polarization, which originates from vertical charge transfer induced by broken mirror symmetry, can be reversed through interlayer sliding. The relative electronegativity of the halogens strongly determines the enhancements or reductions of the polarizations of Janus RuXY bilayers. In addition, the valley polarization and valley splitting at the K/K′ points in Janus RuXY bilayers are inverted upon ferroelectric switching due to interlayer sliding, demonstrating a potential ferroelectric—valley coupling mechanism—the regulation of the valley state by the sliding ferroelectric polarization. Furthermore, atomically projected band structures illustrate that Ru atoms dominate the valley behavior, while contributions from halogen atoms are negligible. The coexistence of low switching energy and strong ferroelectric-valley coupling makes Janus RuXY bilayers a promising platform for energy-efficient multiferroic and valleytronic devices.

二维Janus过渡金属二卤化物RuXY （X, Y = Cl, Br， I）是一类具有滑动铁电性和层间反铁磁性共存的范德华多铁性材料。本文报道了基于第一性原理计算的Janus RuXY双层中的滑动铁电和铁电-谷耦合。由破镜对称引起的垂直电荷转移引起的面外铁电极化可以通过层间滑动逆转。卤素的相对电负性强烈地决定了Janus RuXY双分子层极化的增强或减弱。此外，由于层间滑动，Janus RuXY双层中K/K′点的谷极化和谷分裂在铁电开关时发生反转，证明了一种潜在的铁电-谷耦合机制——滑动铁电极化对谷态的调节。此外，原子投影能带结构表明，钌原子主导了谷行为，而卤素原子的贡献可以忽略不计。低开关能量和强铁电-谷耦合的共存使Janus RuXY双层层成为一种有前途的高能效多铁和谷电子器件平台。

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引用次数: 0

Interplay of the interlayer distance and in-plane lattice relaxations in encapsulated twisted bilayers. 层间距离和面内晶格弛豫的相互作用。

IF 5.1 3区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nanoscale

Pub Date : 2026-02-06 DOI: 10.1039/d5nr03757c

V V Enaldiev

Encapsulation protects functional layers, ensuring structural stability and improving the quality of assembled van der Waals heterostructures. Here, we develop a model that describes lattice relaxation in twisted bilayers accounting for encapsulation effects, incorporated via a single parameter characterizing the rigidity of encapsulation material interfaces. By analysing the twist-angle dependence of weak-to-strong lattice relaxation transition in twisted transition metal dichalcogenide bilayers, we show that increasing interface rigidity raises the crossover twist angle between the two relaxation regimes. Furthermore, tuning this rigidity parameter allows achieving good agreement with existing experimental results.

封装保护功能层，确保结构稳定性，提高组装的范德华异质结构的质量。在这里，我们开发了一个模型，该模型描述了考虑封装效应的扭曲双层中的晶格弛豫，并通过表征封装材料界面刚度的单个参数结合在一起。通过分析扭曲过渡金属二硫化物双层中弱到强晶格弛豫转变的扭角依赖关系，我们发现界面刚度的增加提高了两种弛豫制度之间的交叉扭角。此外，调整该刚度参数可以实现与现有实验结果的良好一致。

引用次数: 0

Sustainable water treatment solutions using MOFs: enhancing efficiency and reducing environmental impact. 使用mof的可持续水处理解决方案：提高效率并减少对环境的影响。

IF 5.1 3区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nanoscale

Pub Date : 2026-02-06 DOI: 10.1039/d5nr04933d

Amal A Nassar, Ayman K El-Sawaf, Anwaar O Ali, Mahmoud F Mubarak

Global water security faces dual challenges of increasing scarcity and persistent pollution. This review clarifies its focus by positioning metal-organic frameworks (MOFs) within the frameworks of environmental sustainability, the circular water economy, and life cycle assessment (LCA). While MOFs offer surface areas typically exceeding 1000 m² g^-1 and tunable porosity for adsorption and desalination, their transition to real-world application is limited by critical engineering hurdles. The scope of this work is explicitly defined by evaluating: (1) MOFs' role in addressing water scarcity; (2) their environmental and economic viability via LCA data; and (3) the identification of barriers to industrial deployment, including raw material costs, regulatory hurdles, and disposal risks. By synthesizing specific examples such as frameworks maintaining stability for 100 days in saline environments and systems targeting energy consumption below 1.0 kWh m^-3 this review identifies the hydrothermal stability benchmarks and total cost of ownership (TCO) hurdles that must be overcome for large-scale commercialization. The focus remains on bridging the gap between laboratory-scale innovation and the practical requirements of sustainable water purification infrastructure.

全球水安全面临着日益稀缺和持续污染的双重挑战。本文通过在环境可持续性、循环水经济和生命周期评价框架内对金属有机框架（MOFs）进行定位，阐明了其研究重点。虽然mof的表面积通常超过1000 m2 g-1，并且可调孔隙度用于吸附和脱盐，但其向实际应用的过渡受到关键工程障碍的限制。本工作的范围是通过评估明确界定的：(1)MOFs在解决水资源短缺方面的作用；(2)通过LCA数据分析其环境和经济可行性；(3)识别产业部署的障碍，包括原材料成本、监管障碍和处置风险。通过综合具体的例子，例如在盐水环境中保持100天稳定性的框架和目标能耗低于1.0 kWh m-3的系统，本综述确定了热液稳定性基准和大规模商业化必须克服的总拥有成本（TCO）障碍。重点仍然是弥合实验室规模的创新与可持续水净化基础设施的实际要求之间的差距。

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引用次数: 0

Spatially Separated Bipolar Transport and Surface Electron Accumulation in Tungsten Diselenide Nanostructures 二硒化钨纳米结构的空间分离双极输运和表面电子积累

IF 6.7 3区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nanoscale

Pub Date : 2026-02-06 DOI: 10.1039/d5nr03739e

Hemanth Kumar Bangolla, Chi-Yang Chen, Chang-Maw Cheng, Kuei-Yi Lee, Liang-Chiun Chao, Rajesh Kumar Ulaganathan, Raman Sankar, Abhishek Ghosh, Ruei-San Chen

We investigated the physical origins of the bipolar transport in WSe2 nanostructures and bulks. A high electron concentration at the surface induced by surface electron accumulation (SEA) has been confirmed by the angle-resolved photoemission spectroscopy (ARPES) measurements. The n-type surface coexisting with the unintentionally p-doped inner bulk of WSe2 results in an interesting “spatially separated” bipolar transport in this layered semiconductor. The selenium vacancies at the surface are inferred the major cause of SEA and their formation and passivation are highly dependent on the interaction of ambient molecules. The maximal surface electron concentration reaching 1020 cm3 is approximately four orders of magnitude higher than the hole concentration of its inner bulk in WSe2.

我们研究了WSe2纳米结构和块体中双极输运的物理起源。角分辨光发射光谱（ARPES）测量证实了表面电子积聚（SEA）引起的表面高电子浓度。n型表面与无意中掺杂p的WSe2内部体共存，导致该层状半导体中有趣的“空间分离”双极输运。表面硒空位是SEA的主要原因，其形成和钝化高度依赖于环境分子的相互作用。在WSe2中，最大表面电子浓度达到1020 cm × 3，比其内部体的空穴浓度高出约4个数量级。

引用次数: 0

Additive manufacturing of glass with nanoscale features: recent progress and prospects 纳米玻璃增材制造研究进展与展望

IF 6.7 3区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nanoscale

Pub Date : 2026-02-06 DOI: 10.1039/d5nr05425g

Kefan Guo, Yiling Lian, Juzheng Chen, Shiyu Ma, Yu Chen, Yang Lu

Additive manufacturing of glass enables 3D micro and nanoscale architectures with optical, photonic, and microfluidic functions beyond the reach of conventional glass processing. However, practical implementation remains constrained by the coupled limitations of achievable resolution, precursor conversion fidelity, thermally induced shrinkage, and manufacturing scalability, as well as by the limited compositional design space of printable glass precursors. Recent progress in photopolymerization based approaches, particularly single photon and two photon polymerizations, has enabled sub micrometer and nanoscale glass structuring through advances in precursor chemistry and post processing control. This review outlines the photopolymerization mechanisms, precursor design principles, and process structure coupling strategies that govern dimensional fidelity and surface quality in nanoscale glass additive manufacturing. Representative progress in micro and nanoscale optical, photonic, and microfluidic devices is summarized to illustrate how nanoscale glass additive manufacturing bridges process control and multifunctional device architectures. Key challenges associated with device level integration and structural fidelity in multifunctional glass microarchitectures are also discussed.

玻璃的增材制造使3D微纳米结构具有光学、光子和微流体功能，超出了传统玻璃加工的范围。然而，实际实施仍然受到可实现的分辨率、前驱体转换保真度、热致收缩和制造可扩展性的耦合限制，以及可打印玻璃前驱体的有限组成设计空间的限制。基于光聚合方法的最新进展，特别是单光子和双光子聚合，通过前体化学和后处理控制的进步，使亚微米和纳米级玻璃结构成为可能。本文概述了纳米级玻璃增材制造的光聚合机制、前驱体设计原则和工艺结构耦合策略，这些策略控制着尺寸保真度和表面质量。概述了微纳米级光学、光子和微流体器件的代表性进展，以说明纳米级玻璃增材制造如何连接过程控制和多功能器件架构。在多功能玻璃微架构中，与器件级集成和结构保真度相关的关键挑战也进行了讨论。

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引用次数: 0

Structurally Robust P/S Co-Deposited Ni–Fe Catalysts Enabling Long-Term Seawater Electrolysis at Ampere-Level Currents 结构坚固的P/S共沉积Ni-Fe催化剂可在安培电流下实现长期海水电解

IF 6.7 3区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nanoscale

Pub Date : 2026-02-05 DOI: 10.1039/d5nr04610f

Divya Bhutani, Yadhu Krishnan P, Srivardan Balaji, Sneha James, Swaraj Servottam, Eswaramoorthy Muthusamy

Seawater, as an abundant and sustainable source, presents an effective alternative for overcoming the cost associated with electrolyzers utilizing fresh water sources. Its inherent ionic conductivity helps efficient green hydrogen generation using seawater electrolysis. However, the presence of chloride ions leads to catalyst dissolution and poor durability, posing significant challenges to long-term operation. In addition, polyionic species such as phosphates and sulfates can influence electrolysis performance by tuning the surface charge distribution, thereby suppressing the chloride adsorption. Herein, we developed Fe, S, and P co-deposited Ni foam catalysts, NF(Fe,P) and NF(Fe,P,S), to strategically exploit the role of polyionic species in enhancing the catalytic stability. The catalysts achieved high current densities of 1.60 A cm⁻² and 1.44 A cm⁻² at overpotentials of 390 mV and 530 mV, respectively, for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). In a two-electrode arrangement, the assembled NF(Fe,P)//NF(Fe,P,S) cell showed a very high durability for 3000 h under ampere-level current density. The post-reaction characterization and electrochemical analyses reveal that the incorporation of polyionic species promotes favorable kinetics and suppresses chloride-induced degradation, resulting in high performance and long-term durability.

海水作为一种丰富和可持续的资源，为克服与利用淡水资源的电解槽相关的成本提供了有效的替代方案。其固有的离子导电性有助于利用海水电解高效的绿色制氢。然而，氯离子的存在导致催化剂溶解，耐久性差，对长期运行构成重大挑战。此外，磷酸盐和硫酸盐等多离子物质可以通过调节表面电荷分布来影响电解性能，从而抑制氯离子的吸附。在此，我们开发了铁、S、P共沉积镍泡沫催化剂NF（Fe，P）和NF(Fe，P，S)，以战略性地利用多离子物种在提高催化稳定性方面的作用。在390 mV和530 mV的过电位下，催化剂的析氧反应（OER）和析氢反应（HER）的电流密度分别为1.60 A cm⁻²和1.44 A cm⁻²。在双电极布置下，组装的NF(Fe，P)//NF（Fe，P，S）电池在安培级电流密度下具有非常高的3000小时耐久性。反应后表征和电化学分析表明，多离子物种的加入促进了良好的动力学，抑制了氯化物诱导的降解，从而获得了高性能和长期耐用性。

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引用次数: 0

SLPcalculator: a web-based tool to estimate nanoparticle heating with peak analysis and F-test SLPcalculator：一个基于网络的工具，通过峰分析和f检验来估计纳米颗粒加热

IF 6.7 3区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nanoscale

Pub Date : 2026-02-05 DOI: 10.1039/d5nr04995d

Iago López Vázquez, Yilian Fernández-Afonso, Antonio Santana-Otero, Sergiu Ruta, Alfredo Amigo, Maria del Puerto Morales, Roy W Chantrell, Lucia Gutierrez, David Serantes

Accurately determining the Specific Loss Power (SLP) remains a major challenge in magnetic hyperthermia and photothermal heating. In this work, we examine the practical implementation of the Peak Analysis Method (PAM), an alternative to Newton's-law-based approaches. Our focus is on how the number of data points affects the identification of the linear regime around the peak of the ∆T(t) curve, as this method relies on calculating and comparing the slopes of the heating and cooling branches around the maximum. Using an F-test-based statistical criterion, we objectively determine the valid linear range and compare the resulting SLP values with those obtained from the Initial Slope Method (ISM), one of the most common Newton-law-based approaches, which also relies on linear range fit. Our results reveal that the correct determination of the linear range leads to significantly different SLP values compared to those obtained using arbitrary time windows, underlining the necessity of employing statistical criteria for a robust and reproducible analysis. Finally, we introduce an open-access website (SLPcalculator.com) that integrates PAM with the Ftest, providing a systematic and user-friendly tool for reliable SLP estimation without the need for manual fitting procedures.

准确确定比损耗功率（SLP）仍然是磁热疗和光热加热的主要挑战。在这项工作中，我们研究了峰值分析方法（PAM）的实际实施，这是基于牛顿定律的方法的替代方案。我们的重点是数据点的数量如何影响识别∆T(T)曲线峰值附近的线性状态，因为这种方法依赖于计算和比较最大值附近的加热和冷却分支的斜率。使用基于f检验的统计标准，我们客观地确定了有效的线性范围，并将所得的SLP值与初始斜率法（ISM）所得的SLP值进行了比较，ISM是最常见的基于牛顿定律的方法之一，也依赖于线性范围拟合。我们的研究结果表明，与使用任意时间窗获得的结果相比，正确确定线性范围会导致SLP值显着不同，这强调了采用统计标准进行稳健和可重复分析的必要性。最后，我们介绍了一个开放访问的网站（SLPcalculator.com），该网站集成了PAM和Ftest，提供了一个系统和用户友好的工具，无需手动拟合程序即可进行可靠的SLP估计。

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引用次数: 0

Do the Halide Ions Exchange and Mix the Same Way in Fresh and Aged CsPbI3 - CsPbBr3 Perovskite Nanocrystals mixture? 在新鲜和陈化的CsPbI3 - CsPbBr3钙钛矿纳米晶混合物中卤化物离子交换和混合是否相同？

IF 6.7 3区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nanoscale

Pub Date : 2026-02-05 DOI: 10.1039/d5nr03830h

Subitan Laskar, Chandran Sudakar

Ultrahigh quantum yield, bandgap tunability, and high absorption coefficient makes CsPbI_3-xBr_x perovskites ideal candidates for various optoelectronic applications. Post synthesis mixing of CsPbI₃ and CsPbBr₃ nanocrystals (NCs) is an effective approach to tune the optical properties of CsPbI_3-xBr_xQDs. The ion mixing mechanism in these perovskite NCs have been of great interest, as they shed valuable insights on how the halide ions get exchanged between the neighbouring NCs. The exchange, mixing, and alloying of halide ions between NCs are influenced by various parameters controlling these reactions. In this study we report two contrasting pathways, depending on the aging of the NCs, by which the halide ions get exchanged between the CsPbI₃ and CsPbBr₃NCs. Changes in the photoluminescence spectra are monitored as a function of time to understand the dynamical changes in composition when CsPbBr₃ and CsPbI₃ NCs are mixed immediately after preparing and after aging for 50 days. Mixing of freshly synthesized CsPbBr₃-NCs and CsPbI₃-NCs in various ratios (2:1, 1:1 and 1:2) lead to both the Br⁻ and I⁻ ions getting rapidly incorporated into the CsPbI₃ and CsPbBr₃ NCs, respectively, as well as nucleation and growth of mixed halide composition, before the final equilibrium phase is formed. On the contrary, when ≧40 days aged NCs of CsPbBr₃ are mixed with CsPbI₃, the diffusion of ions seems to proceed in two-pathways, with the I⁻ ions from CsPbI₃-NCs primarily dissolve and get incorporated into the CsPbBr₃ lattice and equilibrium phase formation by nucleation, while Br⁻ ions do not incorporate into the CsPbI₃ lattice. This more controlled reaction in aged samples is likely due to changes in surface chemistry of NCs, such as the formation of a robust ligand shell on CsPbI₃-NCs, which allows one-way ion exchange.

超高量子产率、带隙可调性和高吸收系数使CsPbI3-xBrx钙钛矿成为各种光电应用的理想候选者。合成后混合CsPbI3和CsPbBr3纳米晶体（NCs）是调整CsPbI3- xbrx量子点光学性质的有效方法。这些钙钛矿NCs中的离子混合机制引起了极大的兴趣，因为它们为卤化物离子如何在邻近的NCs之间交换提供了有价值的见解。卤化物离子在nc之间的交换、混合和合金化受到控制这些反应的各种参数的影响。在这项研究中，我们报告了两种不同的途径，取决于NCs的老化，通过这些途径，卤化物离子在CsPbI3和CsPbBr3 NCs之间交换。监测CsPbBr3和CsPbI3纳米材料制备后立即混合和老化50 d后的光致发光光谱随时间的变化，了解其组成的动态变化。新合成的CsPbBr3-NCs和CsPbI3-NCs以不同的比例（2:1,1:1和1:2）混合，导致Br和I毒血症分别迅速融入CsPbI3和CsPbBr3 NCs中，并在最终平衡阶段形成之前形成混合卤化物成分的成核和生长。相反，当≥40天的CsPbBr3的NCs与CsPbI3混合时，离子的扩散似乎有两种途径，CsPbI3-NCs的I -毒化物主要溶解并结合到CsPbBr3晶格中，通过成核形成平衡相，而Br -毒化物则不结合到CsPbI3晶格中。在老化样品中，这种更受控制的反应可能是由于NCs表面化学的变化，例如CsPbI3-NCs上形成了一个强大的配体壳，允许单向离子交换。

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引用次数: 0

Ultrasensitive Trace-Analyte Detection Empowered by a Flexible Quasi-BIC Terahertz Metasensor 柔性准bic太赫兹超灵敏痕量分析物检测

IF 6.7 3区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nanoscale

Pub Date : 2026-02-05 DOI: 10.1039/d5nr05154a

Tian Ma, Zihao Chen, Jiangkun Tian, Yizu Zou, Guozhong Zhao, Doudou Wang, Depeng Kong, Jun Li

ltrasensitive detection of trace biomarkers is crucial for early disease diagnosis. Terahertz metasensors based on quasibound states in the continuum (quasi-BIC) have emerged as a promising platform for label-free biosensing due to their high quality (Q) factors and strong field confinement. Here, we propose and experimentally demonstrate a flexible plasmonic metasensor for trace-level biomarker detection. The sensor consists of an asymmetric circular split-ring resonator (CSR) enclosed by a square ring (SR), fabricated on a cyclo-olefin copolymer substrate. By breaking the structural symmetry via offsetting the split of CSR, a high-Q quasi-BIC resonance is excited, exhibiting a refractive index sensitivity of up to 200 GHz/RIU. We successfully apply this metasensor for the ultrasensitive detection of L-tyrosine with trace-level concentration, which exhibits a detection limit down to 0.33 μg/mL. This work presents a viable route for developing high-performance, flexible THz biosensors, holding great potential for point-of-care diagnostic applications.

微量生物标志物的低灵敏度检测对于疾病的早期诊断至关重要。基于连续介质准束缚态（quasi-BIC）的太赫兹元传感器由于其高质量(Q)因子和强场约束而成为无标记生物传感的一个有前途的平台。在这里，我们提出并实验证明了一种用于痕量生物标志物检测的柔性等离子体元传感器。该传感器由一个非对称圆形裂环谐振器（CSR）和一个方形环谐振器（SR）组成，该谐振器被制作在环烯烃共聚物衬底上。通过抵消CSR的分裂来打破结构对称性，激发出高q准bic共振，折射率灵敏度高达200 GHz/RIU。我们成功地将该传感器用于痕量浓度l -酪氨酸的超灵敏检测，检测限低至0.33 μg/mL。这项工作为开发高性能、灵活的太赫兹生物传感器提供了一条可行的途径，在即时诊断应用中具有巨大的潜力。

引用次数: 0

Fibroblasts growth enhancement and antibiotic-free disinfection via microneedles with self-powered electrical stimulations 自供电电刺激微针增强成纤维细胞生长和无抗生素消毒

IF 6.7 3区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nanoscale

Pub Date : 2026-02-05 DOI: 10.1039/d5nr01673h

Zheng Wang, Fuqi Lu, Shuting Wang, Xin Wang, Yan Sun, Wenhui Guan, Jianming Dang, Haoxuan Sun, Jiahui Zhang, Qiang Niu, Juqiang Han, Ziyang Ma, Jinjiang Cui, Yunliang Li, Ying Liu, Meidong Huang, Liuxin Duan, Quanda Liu

Fibroblasts growth and sterilization are two critical factors for tissue repairing, particularly infected chronic wounds. Electrical stimulation improves the tissue repairing efficiency through accelerating the migration and proliferation of fibroblasts, but sterilizing the tissue infection normally using antibiotic. In this work, a self-powered nanodevice for producing electrical stimulations with combined antibiotic-free disinfecting function is fabricated. It integrates a triboelectric nanogenerator (TENG) and a PLA-Au-PPY microneedle (MN) array. The TENG generates output voltage up to 6 V, which promotes the NIH-3T3 fibroblasts cell proliferation about three times, inferring a strong cell aggregation capability. The electrical stimulation also doubles the antibacterial efficiency of the PPY layer, through improving the charge transfer between PPY molecules and Escherichia coli. Therefore, the designed nanodevice presents promising potential on accelerating the infected tissue repairing and regeneration, in terms of promoting the growth of cell viability, accelerate tissue recovery, and antibiotic free sterilization.

成纤维细胞的生长和灭菌是组织修复的两个关键因素，特别是感染的慢性伤口。电刺激通过促进成纤维细胞的迁移和增殖来提高组织修复效率，但通常使用抗生素对组织感染进行灭菌。在这项工作中，制造了一种自供电纳米装置，用于产生具有联合无抗生素消毒功能的电刺激。它集成了一个摩擦电纳米发电机（TENG）和一个PLA-Au-PPY微针（MN）阵列。TENG产生高达6 V的输出电压，可促进NIH-3T3成纤维细胞增殖约3倍，表明其具有较强的细胞聚集能力。电刺激还通过改善PPY分子与大肠杆菌之间的电荷转移，使PPY层的抗菌效率翻倍。因此，所设计的纳米器件在促进细胞活力生长、加速组织恢复和无抗生素杀菌等方面，在加速感染组织的修复和再生方面具有很大的潜力。

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引用次数: 0