Nano-Micro Letters最新文献

英文中文

Cationic and Anionic Antimicrobial Agents Co-Templated Mesostructured Silica Nanocomposites with a Spiky Nanotopology and Enhanced Biofilm Inhibition Performance 阳离子和阴离子抗菌剂共模板化具有尖形纳米拓扑和增强生物膜抑制性能的介孔结构二氧化硅纳米复合材料

IF 26.6 1区材料科学 Q1 Engineering

Nano-Micro Letters

Pub Date : 2022-03-29 DOI: 10.1007/s40820-022-00826-4

Yaping Song, Qiang Sun, Jiangqi Luo, Yueqi Kong, Bolin Pan, Jing Zhao, Yue Wang, Chengzhong Yu

AbstractSection Highlights

A ‘dual active templating’ strategy is firstly reported, using cationic and anionic bactericidal agents as co-templates for the preparation of antibacterial silica nanocomposite with spiky nanotopography.
The spiky nanocomposite exhibited enhanced antibacterial and biofilm inhibition performance, compared to pure antimicrobial cationic agent templated smooth silica nanocomposite.

AbstractSection Abstract

Silica-based materials are usually used as delivery systems for antibacterial applications. In rare cases, bactericidal cationic surfactant templated silica composites have been reported as antimicrobial agents. However, their antibacterial efficacy is limited due to limited control in content and structure. Herein, we report a “dual active templating” strategy in the design of nanostructured silica composites with intrinsic antibacterial performance. This strategy uses cationic and anionic structural directing agents as dual templates, both with active antibacterial property. The cationic-anionic dual active templating strategy further contributes to antibacterial nanocomposites with a spiky surface. With controllable release of dual active antibacterial agents, the spiky nanocomposite displays enhanced anti-microbial and anti-biofilm properties toward Staphylococcus epidermidis. These findings pave a new avenue toward the designed synthesis of novel antibacterial nanocomposites with improved performance for diverse antibacterial applications.

摘要首次报道了一种“双活性模板”策略，利用阳离子和阴离子杀菌剂作为共模板制备具有尖形纳米形貌的抗菌二氧化硅纳米复合材料。与纯抗菌阳离子剂模板化光滑二氧化硅纳米复合材料相比，该尖状纳米复合材料表现出更强的抗菌和生物膜抑制性能。摘要硅基材料通常用作抗菌应用的输送系统。在极少数情况下，杀菌阳离子表面活性剂模板二氧化硅复合材料已被报道为抗菌剂。但由于其含量和结构控制有限，抑菌效果有限。在此，我们报道了一种“双活性模板”策略，用于设计具有内在抗菌性能的纳米结构二氧化硅复合材料。该策略使用阳离子和阴离子结构导向剂作为双模板，两者都具有有效的抗菌性能。阳离子-阴离子双活性模板策略进一步促进了具有尖形表面的抗菌纳米复合材料。在可控释放双活性抗菌药物的情况下，尖状纳米复合材料对表皮葡萄球菌具有较强的抗菌和抗生物膜性能。这些发现为设计合成具有更好抗菌性能的新型抗菌纳米复合材料铺平了新的道路。

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引用次数: 8

Multilayer Strategy for Photoelectrochemical Hydrogen Generation: New Electrode Architecture that Alleviates Multiple Bottlenecks 光电化学制氢的多层策略:缓解多重瓶颈的新电极结构

IF 26.6 1区材料科学 Q1 Engineering

Nano-Micro Letters

Pub Date : 2022-03-25 DOI: 10.1007/s40820-022-00822-8

Selvaraj Seenivasan, Hee Moon, Do-Heyoung Kim

Highlights

A multilayer architecture of layers with different functions alleviates bottlenecks in photoelectrochemical (PEC) hydrogen generation. Precise thickness control within a few nanometers defines each layer’s functionality.
A Bi₂S₃/NiS/NiFeO/TiO₂ photoanode had a photocurrent density of 33.3 mA cm⁻² at 1.23 VRHE under AM 1.5 G illumination.
Noble-metal-free seawater splitting was performed in an integrated PEC-electrocatalytic cell with an NiS electrocathode and Bi₂S₃/NiS/NiFeO/TiO₂ photoanode.

不同功能层的多层结构缓解了光电化学(PEC)制氢的瓶颈。精确的厚度控制在几纳米内，定义了每层的功能。在AM 1.5 G光照下，Bi2S3/NiS/NiFeO/TiO2光阳极在1.23 VRHE下的光电流密度为33.3 mA cm−2。采用NiS阴极和Bi2S3/NiS/NiFeO/TiO2光阳极的集成pec电催化电池进行了无贵金属海水裂解。

引用次数: 8

Fully Roll-to-Roll Processed Efficient Perovskite Solar Cells via Precise Control on the Morphology of PbI2:CsI Layer 通过精确控制PbI2:CsI层的形态，实现全卷对卷加工的高效钙钛矿太阳能电池

IF 26.6 1区材料科学 Q1 Engineering

Nano-Micro Letters

Pub Date : 2022-03-25 DOI: 10.1007/s40820-022-00815-7

Hengyue Li, Chuantian Zuo, Dechan Angmo, Hasitha Weerasinghe, Mei Gao, Junliang Yang

Highlights

The slot-die-coated porous PbI₂:CsI film assisted with nitrogen blowing can promote the rapid and complete transformation of perovskite film.
The crystallinity and morphology of slot-die-coated perovskite film are significantly improved by controlling substrate temperature.
Fully slot-die-coated perovskite solar cells achieve a power conversion efficiency (PCE) of 18.13%, and fully roll-to-roll printed flexible PSCs achieve a PCE of 13.00% in ambient condition.

槽模包覆多孔PbI2:CsI膜辅以氮气吹制，可促进钙钛矿膜的快速完全转化。通过控制衬底温度，可以显著改善钙钛矿薄膜的结晶度和形貌。全槽模涂层钙钛矿太阳能电池的功率转换效率(PCE)为18.13%，全卷对卷印刷柔性PSCs在环境条件下的PCE为13.00%。

引用次数: 12

Boosting Zn||I2 Battery’s Performance by Coating a Zeolite-Based Cation-Exchange Protecting Layer 涂覆沸石基阳离子交换保护层提高Zn / I2电池性能

IF 26.6 1区材料科学 Q1 Engineering

Nano-Micro Letters

Pub Date : 2022-03-25 DOI: 10.1007/s40820-022-00825-5

Wenshuo Shang, Qiang Li, Fuyi Jiang, Bingkun Huang, Jisheng Song, Shan Yun, Xuan Liu, Hideo Kimura, Jianjun Liu, Litao Kang

The intrinsically safe Zn||I₂ battery, one of the leading candidates aiming to replace traditional Pb-acid batteries, is still seriously suffering from short shelf and cycling lifespan, due to the uncontrolled I₃⁻-shuttling and dynamic parasitic reactions on Zn anodes. Considering the fact that almost all these detrimental processes terminate on the surfaces of Zn anodes, modifying Zn anodes’ surface with protecting layers should be one of the most straightforward and thorough approaches to restrain these processes. Herein, a facile zeolite-based cation-exchange protecting layer is designed to comprehensively suppress the unfavored parasitic reactions on the Zn anodes. The negatively-charged cavities in the zeolite lattice provide highly accessible migration channels for Zn²⁺, while blocking anions and electrolyte from passing through. This low-cost cation-exchange protecting layer can simultaneously suppress self-discharge, anode corrosion/passivation, and Zn dendrite growth, awarding the Zn||I₂ batteries with ultra-long cycle life (91.92% capacity retention after 5600 cycles at 2 A g⁻¹), high coulombic efficiencies (99.76% in average) and large capacity (203–196 mAh g⁻¹ at 0.2 A g⁻¹). This work provides a highly affordable approach for the construction of high-performance Zn-I₂ aqueous batteries.

本质安全型锌I2电池是取代传统铅酸电池的主要候选电池之一，但由于锌阳极上不受控制的I3−穿梭和动态寄生反应，其货架寿命和循环寿命仍然很短。考虑到几乎所有这些有害过程都终止于锌阳极表面，在锌阳极表面修饰保护层应该是抑制这些过程最直接和彻底的方法之一。本文设计了一种基于易溶沸石的阳离子交换保护层，以全面抑制Zn阳极上的不利寄生反应。沸石晶格中的负电荷空腔为Zn2+提供了高度可达的迁移通道，同时阻挡了阴离子和电解质的通过。这种低成本的阳离子交换保护层可以同时抑制自放电、阳极腐蚀/钝化和Zn枝晶生长，使Zn| I2电池具有超长循环寿命(在2 A g−1条件下5600次循环后容量保持率为91.92%)、高库仑效率(平均99.76%)和大容量(0.2 A g−1条件下203-196 mAh g−1)。这项工作为构建高性能锌- i2水性电池提供了一种经济实惠的方法。

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引用次数: 36

Recent Advances in Design Strategies and Multifunctionality of Flexible Electromagnetic Interference Shielding Materials 柔性电磁干扰屏蔽材料设计策略及多功能性研究进展

IF 26.6 1区材料科学 Q1 Engineering

Nano-Micro Letters

Pub Date : 2022-03-25 DOI: 10.1007/s40820-022-00823-7

Junye Cheng, Chuanbing Li, Yingfei Xiong, Huibin Zhang, Hassan Raza, Sana Ullah, Jinyi Wu, Guangping Zheng, Qi Cao, Deqing Zhang, Qingbin Zheng, Renchao Che

With rapid development of 5G communication technologies, electromagnetic interference (EMI) shielding for electronic devices has become an urgent demand in recent years, where the development of corresponding EMI shielding materials against detrimental electromagnetic radiation plays an essential role. Meanwhile, the EMI shielding materials with high flexibility and functional integrity are highly demanded for emerging shielding applications. Hitherto, a variety of flexible EMI shielding materials with lightweight and multifunctionalities have been developed. In this review, we not only introduce the recent development of flexible EMI shielding materials, but also elaborate the EMI shielding mechanisms and the index for "green EMI shielding" performance. In addition, the construction strategies for sophisticated multifunctionalities of flexible shielding materials are summarized. Finally, we propose several possible research directions for flexible EMI shielding materials in near future, which could be inspirational to the fast-growing next-generation flexible electronic devices with reliable and multipurpose protections as offered by EMI shielding materials.

随着5G通信技术的快速发展，对电子设备进行电磁干扰屏蔽已成为近年来的迫切需求，开发相应的电磁干扰屏蔽材料对抵御有害电磁辐射起着至关重要的作用。同时，新兴屏蔽应用对具有高灵活性和功能完整性的电磁干扰屏蔽材料提出了很高的要求。迄今为止，人们已经开发出了多种轻量化、多功能的柔性电磁干扰屏蔽材料。本文介绍了柔性电磁干扰屏蔽材料的最新进展，阐述了电磁干扰屏蔽机理和“绿色电磁干扰屏蔽”性能指标。此外，还总结了柔性屏蔽材料复杂多功能的构建策略。最后，我们提出了柔性电磁干扰屏蔽材料在不久的将来可能的研究方向，这对快速发展的下一代柔性电子设备具有启发意义，因为电磁干扰屏蔽材料提供了可靠和多用途的保护。

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引用次数: 117

Hierarchical Ti3C2Tx@ZnO Hollow Spheres with Excellent Microwave Absorption Inspired by the Visual Phenomenon of Eyeless Urchins 受无眼海胆视觉现象启发，具有优异微波吸收性能的分层Ti3C2Tx@ZnO空心球体

IF 26.6 1区材料科学 Q1 Engineering

Nano-Micro Letters

Pub Date : 2022-03-21 DOI: 10.1007/s40820-022-00817-5

Yan-Qin Wang, Hai-Bo Zhao, Jin-Bo Cheng, Bo-Wen Liu, Qiang Fu, Yu-Zhong Wang

Ingenious microstructure design and rational composition selection are effective approaches to realize high-performance microwave absorbers, and the advancement of biomimetic manufacturing provides a new strategy. In nature, urchins are the animals without eyes but can “see”, because their special structure composed of regular spines and spherical photosensitive bodies “amplifies” the light-receiving ability. Herein, inspired by the above phenomenon, the biomimetic urchin-like Ti₃C₂T_x@ZnO hollow microspheres are rationally designed and fabricated, in which ZnO nanoarrays (length: ~ 2.3 μm, diameter: ~ 100 nm) as the urchin spines are evenly grafted onto the surface of the Ti₃C₂T_x hollow spheres (diameter: ~ 4.2 μm) as the urchin spherical photosensitive bodies. The construction of gradient impedance and hierarchical heterostructures enhance the attenuation of incident electromagnetic waves. And the EMW loss behavior is further revealed by limited integral simulation calculations, which fully highlights the advantages of the urchin-like architecture. As a result, the Ti₃C₂T_x@ZnO hollow spheres deliver a strong reflection loss of − 57.4 dB and broad effective absorption bandwidth of 6.56 GHz, superior to similar absorbents. This work provides a new biomimetic strategy for the design and manufacturing of advanced microwave absorbers.

巧妙的微结构设计和合理的成分选择是实现高性能微波吸收剂的有效途径，仿生制造技术的发展为实现高性能微波吸收剂提供了新的策略。在自然界中，海胆是没有眼睛但能“看见”的动物，因为它们由规则的脊椎和球形光敏体组成的特殊结构“放大”了光的接收能力。本文受上述现象的启发，合理设计并制备了仿生海胆样Ti3C2Tx@ZnO空心微球，将ZnO纳米阵列(长度:~ 2.3 μm，直径:~ 100 nm)作为海胆棘均匀接枝到Ti3C2Tx空心球(直径:~ 4.2 μm)表面作为海胆球光敏体。梯度阻抗和分层异质结构的构建增强了入射电磁波的衰减。并通过有限积分模拟计算进一步揭示了EMW的损耗行为，充分体现了类海胆结构的优势。结果表明，Ti3C2Tx@ZnO空心球具有- 57.4 dB的强反射损耗和6.56 GHz的宽有效吸收带宽，优于同类吸收材料。本研究为先进微波吸收器的设计和制造提供了一种新的仿生策略。

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引用次数: 82

Visualized SERS Imaging of Single Molecule by Ag/Black Phosphorus Nanosheets 银/黑磷纳米片单分子的可视化SERS成像

IF 26.6 1区材料科学 Q1 Engineering

Nano-Micro Letters

Pub Date : 2022-03-15 DOI: 10.1007/s40820-022-00803-x

Chenglong Lin, Shunshun Liang, Yusi Peng, Li Long, Yanyan Li, Zhengren Huang, Nguyen Viet Long, Xiaoying Luo, Jianjun Liu, Zhiyuan Li, Yong Yang

Highlights

Ag/BP-NS exhibit remarkable surface-enhanced Raman scattering performance with single-molecule detection ability. This remarkable enhancement can be attributed to the synergistic resonance enhancement of R6G molecular resonance, photo-induced charge transfer resonance and electromagnetic resonance.
A new polarization-mapping method was proposed, which can quickly screen out single-molecule signals and prove that the obtained spectra are emitted by single molecule.
The recognition of different tumor exosomes can be realized combining the method of machine learning.

AbstractSection Abstract

Single-molecule detection and imaging are of great value in chemical analysis, biomarker identification and other trace detection fields. However, the localization and visualization of single molecule are still quite a challenge. Here, we report a special-engineered nanostructure of Ag nanoparticles embedded in multi-layer black phosphorus nanosheets (Ag/BP-NS) synthesized by a unique photoreduction method as a surface-enhanced Raman scattering (SERS) sensor. Such a SERS substrate features the lowest detection limit of 10^–20 mol L⁻¹ for R6G, which is due to the three synergistic resonance enhancement of molecular resonance, photo-induced charge transfer resonance and electromagnetic resonance. We propose a polarization-mapping strategy to realize the detection and visualization of single molecule. In addition, combined with machine learning, Ag/BP-NS substrates are capable of recognition of different tumor exosomes, which is meaningful for monitoring and early warning of the cancer. This work provides a reliable strategy for the detection of single molecule and a potential candidate for the practical bio-application of SERS technology.

Ag/BP-NS具有优异的表面增强拉曼散射性能和单分子检测能力。这种显著的增强可归因于R6G分子共振、光诱导电荷转移共振和电磁共振的协同共振增强。提出了一种新的极化映射方法，该方法可以快速筛选出单分子信号，并证明得到的光谱是由单分子发射的。结合机器学习的方法可以实现对不同肿瘤外泌体的识别。摘要单分子检测与成像在化学分析、生物标志物鉴定等痕量检测领域具有重要的应用价值。然而，单分子的定位和可视化仍然是一个很大的挑战。在这里，我们报道了一种特殊工程的纳米结构，将银纳米颗粒嵌入多层黑磷纳米片(Ag/BP-NS)中，通过独特的光还原方法合成，作为表面增强拉曼散射(SERS)传感器。这种SERS底物对R6G的最低检出限为10-20 mol L−1，这是由于分子共振、光致电荷转移共振和电磁共振三种协同共振增强的结果。我们提出了一种偏振映射策略来实现单分子的检测和可视化。此外，结合机器学习，Ag/BP-NS底物能够识别不同的肿瘤外泌体，这对癌症的监测和早期预警具有重要意义。这项工作为单分子检测提供了可靠的策略，并为SERS技术的实际生物应用提供了潜在的候选方案。

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引用次数: 29

Isotype Heterojunction-Boosted CO2 Photoreduction to CO 同型异质结促进CO2光还原成CO

IF 26.6 1区材料科学 Q1 Engineering

Nano-Micro Letters

Pub Date : 2022-03-12 DOI: 10.1007/s40820-022-00821-9

Chaogang Ban, Youyu Duan, Yang Wang, Jiangping Ma, Kaiwen Wang, Jiazhi Meng, Xue Liu, Cong Wang, Xiaodong Han, Guozhong Cao, Liyong Gan, Xiaoyuan Zhou

Highlights

The g-C₃N₄ isotype heterojunction was synthesized for photocatalytic CO₂ reduction, which exhibits an impressive activity and outstanding stability.
The isotype heterojunction presents more favorable charge separation and transfer performance than the single components.
The enhanced photogenerated charge dynamics in isotype heterojunction facilitates the production of key intermediates and thus the whole reaction kinetics.

g-C3N4异质结光催化还原CO2，具有良好的活性和稳定性。同型异质结比单一组分具有更好的电荷分离和转移性能。在同型异质结中增强的光生电荷动力学促进了关键中间体的产生，从而促进了整个反应动力学。

引用次数: 37

Correction to: Nb2C MXene-Functionalized Scaffolds Enables Osteosarcoma Phototherapy and Angiogenesis/Osteogenesis of Bone Defects 修正:Nb2C mxene功能化支架使骨肉瘤光疗和骨缺损血管生成/成骨

IF 26.6 1区材料科学 Q1 Engineering

Nano-Micro Letters

Pub Date : 2022-03-07 DOI: 10.1007/s40820-022-00805-9

Junhui Yin, Shanshan Pan, Xiang Guo, Youshui Gao, Daoyu Zhu, Qianhao Yang, Junjie Gao, Changqing Zhang, Yu Chen

引用次数: 0

Correction to: Memristive Devices Based on Two-Dimensional Transition Metal Chalcogenides for Neuromorphic Computing 修正:基于二维过渡金属硫族化合物的记忆器件用于神经形态计算

IF 26.6 1区材料科学 Q1 Engineering

Nano-Micro Letters

Pub Date : 2022-03-05 DOI: 10.1007/s40820-022-00816-6

Ki Chang Kwon, Ji Hyun Baek, Kootak Hong, Soo Young Kim, Ho Won Jang

引用次数: 2

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