Fengjin Yang, Zhifei Wang, Wei Zhang, Sai Wang, Yi-Tao Liu, Fei Wang, Roman A. Surmenev, Jianyong Yu, Shichao Zhang, Bin Ding
{"title":"Superelastic and Washable Micro/Nanofibrous Sponges Based on Biomimetic Helical Fibers for Efficient Thermal Insulation","authors":"Fengjin Yang, Zhifei Wang, Wei Zhang, Sai Wang, Yi-Tao Liu, Fei Wang, Roman A. Surmenev, Jianyong Yu, Shichao Zhang, Bin Ding","doi":"10.1007/s40820-025-01882-2","DOIUrl":"10.1007/s40820-025-01882-2","url":null,"abstract":"<div><h2>Highlights</h2><div>\u0000 \u0000 <ul>\u0000 <li>\u0000 <p>A superelastic and washable sponge based on biomimetic spring-like helical micro/nanofibers is directly fabricated by multiple-jet electrospinning technology.</p>\u0000 </li>\u0000 <li>\u0000 <p>The resulting sponge exhibits both lightweight (low density of 7.1 mg cm<sup>–3</sup>) and robust mechanical property (large tensile strain up to 200%).</p>\u0000 </li>\u0000 <li>\u0000 <p>The sponge also shows efficient thermal insulation performance with low thermal conductivity (24.85 mW m<sup>–1</sup> K<sup>–1</sup>), and remains structural stability even after cyclic washing, making it a promising candidate for personal protection in cold environments.</p>\u0000 </li>\u0000 </ul>\u0000 </div></div>","PeriodicalId":714,"journal":{"name":"Nano-Micro Letters","volume":"18 1","pages":""},"PeriodicalIF":36.3,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40820-025-01882-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Meng Cui, Liyun Zhen, Xingyu Bai, Lihan Yu, Xuhao Chen, Jingquan Liu, Qingkun Liu, Bin Yang
{"title":"An Ultrasonic Microrobot Enabling Ultrafast Bidirectional Navigation in Confined Tubular Environments","authors":"Meng Cui, Liyun Zhen, Xingyu Bai, Lihan Yu, Xuhao Chen, Jingquan Liu, Qingkun Liu, Bin Yang","doi":"10.1007/s40820-025-01894-y","DOIUrl":"10.1007/s40820-025-01894-y","url":null,"abstract":"<div><p>Pipelines are extensively used in environments such as nuclear power plants, chemical factories, and medical devices to transport gases and liquids. These tubular environments often feature complex geometries, confined spaces, and millimeter-scale height restrictions, presenting significant challenges to conventional inspection methods. Here, we present an ultrasonic microrobot (weight, 80 mg; dimensions, 24 mm × 7 mm; thickness, 210 μm) to realize agile and bidirectional navigation in narrow pipelines. The ultrathin structural design of the robot is achieved through a high-performance piezoelectric composite film microstructure based on MEMS technology. The robot exhibits various vibration modes when driven by ultrasonic frequency signals, its motion speed reaches 81 cm s<sup>−1</sup> at 54.8 kHz, exceeding that of the fastest piezoelectric microrobots, and its forward and backward motion direction is controllable through frequency modulation, while the minimum driving voltage for initial movement can be as low as 3 V<sub>P-P</sub>. Additionally, the robot can effortlessly climb slopes up to 24.25° and carry loads more than 36 times its weight. The robot is capable of agile navigation through curved L-shaped pipes, pipes made of various materials (acrylic, stainless steel, and polyvinyl chloride), and even over water. To further demonstrate its inspection capabilities, a micro-endoscope camera is integrated into the robot, enabling real-time image capture inside glass pipes.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":714,"journal":{"name":"Nano-Micro Letters","volume":"18 1","pages":""},"PeriodicalIF":36.3,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40820-025-01894-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Saturated Alcohols Electrocatalytic Oxidations on Ni-Co Bimetal Oxide Featuring Balanced B- and L-Acidic Active Sites","authors":"Junqing Ma, Wenshu Luo, Xunlu Wang, Xu Yu, Jiacheng Jayden Wang, Huashuai Hu, Hanxiao Du, Jianrong Zeng, Wei Chen, Minghui Yang, Jiacheng Wang, Xiangzhi Cui","doi":"10.1007/s40820-025-01893-z","DOIUrl":"10.1007/s40820-025-01893-z","url":null,"abstract":"<div><p>Investigating structural and hydroxyl group effects in electrooxidation of alcohols to value-added products by solid-acid electrocatalysts is essential for upgrading biomass alcohols. Herein, we report efficient electrocatalytic oxidations of saturated alcohols (C<sub>1</sub>-C<sub>6</sub>) to selectively form formate using NiCo hydroxide (NiCo–OH) derived NiCo<sub>2</sub>O<sub>4</sub> solid-acid electrocatalysts with balanced Lewis acid (LASs) and Brønsted acid sites (BASs). Thermal treatment transforms BASs-rich (89.6%) NiCo–OH into NiCo<sub>2</sub>O<sub>4</sub> with nearly equal distribution of LASs (53.1%) and BASs (46.9%) which synergistically promote adsorption and activation of OH<sup>−</sup> and alcohol molecules for enhanced oxidation activity. In contrast, BASs-enriched NiCo–OH facilitates formation of higher valence metal sites, beneficial for water oxidation. The combined experimental studies and theoretical calculation imply the oxidation ability of C<sub>1</sub>-C<sub>6</sub> alcohols increases as increased number of hydroxyl groups and decreased HOMO–LUMO gaps: methanol (C<sub>1</sub>) < ethylene glycol (C<sub>2</sub>) < glycerol (C<sub>3</sub>) < meso-erythritol (C<sub>4</sub>) < xylitol (C<sub>5</sub>) < sorbitol (C<sub>6</sub>), while the formate selectivity shows the opposite trend from 100 to 80%. This study unveils synergistic roles of LASs and BASs, as well as hydroxyl group effect in electro-upgrading of alcohols using solid-acid electrocatalysts.\u0000</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":714,"journal":{"name":"Nano-Micro Letters","volume":"18 1","pages":""},"PeriodicalIF":36.3,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40820-025-01893-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"High-Entropy Oxide Memristors for Neuromorphic Computing: From Material Engineering to Functional Integration","authors":"Jia-Li Yang, Xin-Gui Tang, Xuan Gu, Qi-Jun Sun, Zhen-Hua Tang, Wen-Hua Li, Yan-Ping Jiang","doi":"10.1007/s40820-025-01891-1","DOIUrl":"10.1007/s40820-025-01891-1","url":null,"abstract":"<div><h2>Highlights</h2><div>\u0000 \u0000 <ul>\u0000 <li>\u0000 <p>Comprehensive overview of high-entropy oxides (HEOs) in memristive devices, emphasizing their potential in neuromorphic computing and their ability to simulate synaptic plasticity and multilevel conductance modulation.</p>\u0000 </li>\u0000 <li>\u0000 <p>Detailed exploration of resistive switching mechanisms in HEO-based memristors, focusing on vacancy migration, phase transitions, and valence-state dynamics, which underpin their performance in brain-inspired electronics.</p>\u0000 </li>\u0000 <li>\u0000 <p>Insightful discussion on the challenges and opportunities for integrating HEO-based memristors into large-scale neuromorphic systems, highlighting the need for advancements in material design, interface optimization, and scalability.</p>\u0000 </li>\u0000 </ul>\u0000 </div></div>","PeriodicalId":714,"journal":{"name":"Nano-Micro Letters","volume":"18 1","pages":""},"PeriodicalIF":36.3,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40820-025-01891-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhiyang Zhao, Romain Civioc, Wei Liu, Peiying Hu, Mengmeng Li, Fuhao Xu, Robin Pauer, Jiabei Luo, Samuel Brunner, Paweł P. Ziemiański, Ilia Sadykov, Sandra Galmarini, Yong Kong, Xiaodong Shen, Wim J. Malfait, Shanyu Zhao
{"title":"Three-dimensional Patterning Super-Black Silica-Based Nanocomposite Aerogels","authors":"Zhiyang Zhao, Romain Civioc, Wei Liu, Peiying Hu, Mengmeng Li, Fuhao Xu, Robin Pauer, Jiabei Luo, Samuel Brunner, Paweł P. Ziemiański, Ilia Sadykov, Sandra Galmarini, Yong Kong, Xiaodong Shen, Wim J. Malfait, Shanyu Zhao","doi":"10.1007/s40820-025-01870-6","DOIUrl":"10.1007/s40820-025-01870-6","url":null,"abstract":"<div><div>\u0000 <span>AbstractSection</span>\u0000 Highlights\u0000 \u0000<ul>\u0000 <li>\u0000 <p>The 3D printed aerogel has an ultra-low thermal conductivity (15.8 mW m<sup>–1</sup> K<sup>–1</sup>), make it an ideal insulation material in extreme environment (The surface temperature of a 1 cm thickness green body maintained at ≈60 °C after being placed at 300 °C for 30 min).</p>\u0000 </li>\u0000 <li>\u0000 <p>The super-black silica-carbon aerogel exhibits surprising light absorption feature (as high as 99.56%), and shows rapid evaporation rate (2.25 kg m<sup>-2</sup> h<sup>-1</sup>) and excellent energy conversion efficiency (94.2%). </p>\u0000 </li>\u0000 <li>\u0000 <p>The combination of super-black and super-insulation features, offering immense potential for multifunctional, high-performance applications across thermal and optical domains.</p>\u0000 </li>\u0000 </ul>\u0000 \u0000 </div></div>","PeriodicalId":714,"journal":{"name":"Nano-Micro Letters","volume":"18 1","pages":""},"PeriodicalIF":36.3,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40820-025-01870-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144869041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhiyu Yao, Wenjie Wu, Fengxian Gao, Min Gong, Liang Zhang, Dongrui Wang, Baochun Guo, Liqun Zhang, Xiang Lin
{"title":"Flexible Tactile Sensing Systems: Challenges in Theoretical Research Transferring to Practical Applications","authors":"Zhiyu Yao, Wenjie Wu, Fengxian Gao, Min Gong, Liang Zhang, Dongrui Wang, Baochun Guo, Liqun Zhang, Xiang Lin","doi":"10.1007/s40820-025-01872-4","DOIUrl":"10.1007/s40820-025-01872-4","url":null,"abstract":"<div><p>Since the first design of tactile sensors was proposed by Harmon in 1982, tactile sensors have evolved through four key phases: industrial applications (1980s, basic pressure detection), miniaturization via MEMS (1990s), flexible electronics (2010s, stretchable materials), and intelligent systems (2020s-present, AI-driven multimodal sensing). With the innovation of material, processing techniques, and multimodal fusion of stimuli, the application of tactile sensors has been continuously expanding to a diversity of areas, including but not limited to medical care, aerospace, sports and intelligent robots. Currently, researchers are dedicated to develop tactile sensors with emerging mechanisms and structures, pursuing high-sensitivity, high-resolution, and multimodal characteristics and further constructing tactile systems which imitate and approach the performance of human organs. However, challenges in the combination between the theoretical research and the practical applications are still significant. There is a lack of comprehensive understanding in the state of the art of such knowledge transferring from academic work to technical products. Scaled-up production of laboratory materials faces fatal challenges like high costs, small scale, and inconsistent quality. Ambient factors, such as temperature, humidity, and electromagnetic interference, also impair signal reliability. Moreover, tactile sensors must operate across a wide pressure range (0.1 kPa to several or even dozens of MPa) to meet diverse application needs. Meanwhile, the existing algorithms, data models and sensing systems commonly reveal insufficient precision as well as undesired robustness in data processing, and there is a realistic gap between the designed and the demanded system response speed. In this review, oriented by the design requirements of intelligent tactile sensing systems, we summarize the common sensing mechanisms, inspired structures, key performance, and optimizing strategies, followed by a brief overview of the recent advances in the perspectives of system integration and algorithm implementation, and the possible roadmap of future development of tactile sensors, providing a forward-looking as well as critical discussions in the future industrial applications of flexible tactile sensors.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":714,"journal":{"name":"Nano-Micro Letters","volume":"18 1","pages":""},"PeriodicalIF":36.3,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40820-025-01872-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Down-Top Strategy Engineered Large-Scale Fluorographene/PBO Nanofibers Composite Papers with Excellent Wave-Transparent Performance and Thermal Conductivity","authors":"Yuhan Lin, Lin Tang, Mingshun Jia, Mukun He, Junliang Zhang, Yusheng Tang, Junwei Gu","doi":"10.1007/s40820-025-01878-y","DOIUrl":"10.1007/s40820-025-01878-y","url":null,"abstract":"<div><p>With the miniaturization and high-frequency evolution of antennas in 5G/6G communications, aerospace, and transportation, polymer composite papers integrating superior wave-transparent performance and thermal conductivity for radar antenna systems are urgently needed. Herein, a down-top strategy was employed to synthesize poly(p-phenylene benzobisoxazole) precursor nanofibers (<i>pre</i>PNF). The <i>pre</i>PNF was then uniformly mixed with fluorinated graphene (FG) to fabricate FG/PNF composite papers through consecutively suction filtration, hot-pressing, and thermal annealing. The hydroxyl and amino groups in <i>pre</i>PNF enhanced the stability of FG/<i>pre</i>PNF dispersion, while the increased π-π interactions between PNF and FG after annealing improved their compatibility. The preparation time and cost of PNF paper was significantly reduced when applying this strategy, which enabled its large-scale production. Furthermore, the prepared FG/PNF composite papers exhibited excellent wave-transparent performance and thermal conductivity. When the mass fraction of FG was 40 wt%, the FG/PNF composite paper prepared via the down-top strategy achieved the wave-transparent coefficient (|<i>T</i>|<sup>2</sup>) of 96.3% under 10 GHz, in-plane thermal conductivity (<i>λ</i><sub><i>∥</i></sub>) of 7.13 W m<sup>−1</sup> K<sup>−1</sup>, and through-plane thermal conductivity (<i>λ</i><sub>⊥</sub>) of 0.67 W m<sup>−1</sup> K<sup>−1</sup>, outperforming FG/PNF composite paper prepared by the top-down strategy (|<i>T</i>|<sup>2</sup> = 95.9%, <i>λ</i><sub><i>∥</i></sub> = 5.52 W m<sup>−1</sup> K<sup>−1</sup>, <i>λ</i><sub>⊥</sub> = 0.52 W m<sup>−1</sup> K<sup>−1</sup>) and pure PNF paper (|<i>T</i>|<sup>2</sup> = 94.7%, <i>λ</i><sub><i>∥</i></sub> = 3.04 W m<sup>−1</sup> K<sup>−1</sup>, <i>λ</i><sub>⊥</sub> = 0.24 W m<sup>−1</sup> K<sup>−1</sup>). Meanwhile, FG/PNF composite paper (with 40 wt% FG) through the down-top strategy also demonstrated outstanding mechanical properties with tensile strength and toughness reaching 197.4 MPa and 11.6 MJ m<sup>−3</sup>, respectively.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":714,"journal":{"name":"Nano-Micro Letters","volume":"18 1","pages":""},"PeriodicalIF":36.3,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s40820-025-01878-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144869043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}