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4D-printed novel zero Poisson's ratio honeycombs based on thermoplastic polymers: Thermo-mechanical experiments and modeling

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Thin-Walled Structures 2025年 215卷

作者： Boyu Zhang Jianping Gu Wencheng Pan Jian Huang Huiyu Sun State Key Laboratory of Mechanics and Control for Aerospace Structures Nanjing University of Aeronautics and Astronautics Nanjing China Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology School of Materials Science and Engineering Nanjing Institute of Technology Nanjing China Nanjing Fiberglass Research and Design Institute Co. Ltd. Nanjing China

In this study, a novel zero Poisson's ratio (ZPR) honeycomb is proposed by reconfiguring the inclined and vertical walls of re-entrant structure. A theoretical model based on energy theorems for the honeycomb is established to analyze the in-plane mechanical properties. By analyzing the process parameters related to 4D printing, the accuracy correction coefficient related to the nozzle diameter is proposed. The modified theoretical model can better predict the in-plane mechanical properties of the structure under small deformation. Based on the model, the dimensional parameter analysis of the structure is carried out. It is shown that there is a great range to adjust the mechanical properties of the honeycombs. At the same time, compared with the conventional ZPR honeycombs, the structure can improve the in-plane shear modulus without sacrificing the deformation capacity. In addition, 4D printing technology enables structures to be programmed to adjust its mechanical properties by controlling the temperature, and also has the ability to return to its original shape autonomously after thermal stimulation. Moreover, the thermo-mechanical and smart responses of the honeycomb are investigated by experiments and finite element analysis. Finally, the stability of the structure is proved by multiple shape memory cycle tests. The study of the 4D-printed ZPR honeycomb in this paper provides foundation for the application in various engineering areas such as self-deployable structures, soft robots, and flexible electronics.

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An integrative drug repositioning framework discovered a potential therapeutic agent targeting COVID-19

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Signal Transduction and Targeted Therapy 2021年第5期6卷 1585-1600页

作者： Yiyue Ge Tingzhong Tian Suling Huang Fangping Wan Jingxin Li Shuya Li Xiaoting Wang Hui Yang Lixiang Hong Nian Wu Enming Yuan Yunan Luo Lili Cheng Chengliang Hu Yipin Lei Hantao Shu Xiaolong Feng Ziyuan Jiang Yunfu Wu Ying Chi Xiling Guo Lunbiao Cui Liang Xiao Zeng Li Chunhao Yang Zehong Miao Ligong Chen Haitao Li Hainian Zeng Dan Zhao Fengcai Zhu Xiaokun Shen Jianyang Zeng Institute for Interdisciplinary Information Sciences Tsinghua UniversityBeijingChina NHC Key laboratory of Emeric Pathogenic Microbiology Jiangsu Provincial Center for Diseases Control and PreventionNanjingJiangsu ProvinceChina Shanghai Institute of Materia Medica Chinese Academy of SciencesShanghaiChina Silexon Al Technology Co. Ltd.NanjingJiangsu ProvinceChina Department of Computer Science University of Illinois at Urbana-ChampaignIllinoisILUSA School of Pharmaceutical Sciences Tsinghua UniversityBeijingChina School of Electronic Information and Communications Huazhong University of Science and TechnologyWuhanHubei ProvinceChina Institute of Pathology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina Department of Automation Tsinghua UniversityBeijingChina Inner Mongolia Alashan League Organization Establishment Committee Office Electronic Support Center AlashanInner MongoliaChina Convalife(Shanghai)Co. Ltd.ShanghaiChina Advanced Innovation Center for Human Brain Protection Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Beijing Advanced Innovation Center for Structural Biology Tsinghua-Peking Joint Center for Life SciencesDepartment of Basic Medical SciencesSchool of MedicineTsinghua UniversityBeijingChina Center for Global Health Nanjing Medical UniversityNanjingJiangsu ProvinceChina

The global spread of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)requires an urgent need to find effective therapeutics for the treatment of coronavirus disease 2019(COVID-19).In this study,we developed an integrative drug repositioning framework,which fully takes advantage of machine learning and statistical analysis approaches to systematically integrate and mine large-scale knowledge graph,literature and transcriptome data to discover the potential drug candidates against *** in silico screening followed by wet-lab validation indicated that a poly-ADP-ribose polymerase 1(PARP1)inhibitor,CVL218,currently in Phase I clinical trial,may be repurposed to treat *** in vitro assays revealed that CVL218 can exhibit effective inhibitory activity against SARS-CoV-2 replication without obvious cytopathic *** addition,we showed that CVL218 can interact with the nucleocapsid(N)protein of SARS-CoV-2 and is able to suppress the LPS-induced production of several inflammatory cytokines that are highly relevant to the prevention of immunopathology induced by SARS-CoV-2 infection.

关键词： prevention respiratory acute

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A Space Crawling Robotic Bio-Paw (Scrbp) Enabled by Triboelectric Sensors for Surface Identification

SSRN

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SSRN 2022年

作者： Hou, Xuyan Zhang, Li Gao, Guowei Liu, Yuhui Na, Zhonglai Xu, QingZhang Ding, Tianxiang Li, Long Chen, Tao Research Center of Aerospace Mechanism and Control School of Mechatronics Engineering Harbin Institute of Technology Harbin150080 China Department of MECHANICAL ENGINEERING FACULTY OF ENGINEERING Hong Kong Polytechnic University Hong Kong Shanghai Key Laboratory of Intelligent Manufacturing and Robotics School of Mechatronic Engineering and Automation Shanghai University Shanghai200444 China Jiangsu Provincial Key Laboratory of Advanced Robotics School of Mechanical and Electric Engineering Soochow University Suzhou215123 China

With the rapid development of space crawling robotics technology, tactile perception, a significant source for the robot to sense the external environment, has become the preferred solution to gather information in space. Sensors embedded in the robotic end-effector unit can collect and encode the large tactile data, allowing the robot to feel and perceive the real surroundings. Therefore, a space crawling robotic bio-paw (SCRBP) inspired by a cat paw, which performs as a compliant device and can flat the impulse force during the robot’s contact process to the target surface, is proposed in this paper. Meanwhile, a touch-sensing system embedded on SCRBP with self-powered sensors based on the triboelectric nanogenerator (TENG) technology is proposed which can provide the multi-dimensional sensation information in real time. By combining with machine learning (ML), the sensory system can be used for surface identification from the footfall process to the robot’s controller hub. In conclusion, SCRBP device proposed in this paper has obvious advantages in surface information acquisition, space adaptability, power consumption, cost, reliable signal and minimized data. Accordingly, SCRBP system shows fabulous potential in space robotics. © 2022, The Authors. All rights reserved.

关键词： End effectors

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Black phosphorus-based van der Waals heterostructures for mid-infrared light-emission applications

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Light(Science & Applications) 2020年第1期9卷 922-929页

作者： Xinrong Zong Huamin Hu Gang Ouyang Jingwei Wang Run Shi Le Zhang Qingsheng Zeng Chao Zhu Shouheng Chen Chun Cheng Bing Wang Han Zhang Zheng Liu Wei Huang Taihong Wang Lin Wang Xiaolong Chen Department of Electrical and Electronic Engineering Southern University of Science and Technology518055 ShenzhenChina Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing Tech University(Nanjing Tech)30 South Puzhu Road211816 NanjingChina Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education and Key Laboratory for Matter Microstructure and Function of Hunan ProvinceHunan Normal University410081 ChangshaChina Department of Materials Science and Engineering Southern University of Science and Technology518055 ShenzhenChina Center for Programmable Materials School of Materials Science and Engineering Nanyang Technological University Singapore 639798Singapore Institute of Microscale Optoelectronics Collaborative Innovation Centre for Optoelectronic Science&TechnologyKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro-Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy(SZ)Shenzhen University518060 ShenzhenChina Frontiers Science Center for Flexible Electronics(FSCFE) Shaanxi Institute of Flexible Electronics(SIFE)&Shaanxi Institute of Biomedical Materials and Engineering(SIBME)Northwestern Polytechnical University(NPU)127 West Youyi Road710072 Xi’anChina

Mid-infrared(MIR)light-emitting devices play a key role in optical communications,thermal imaging,and material analysis ***-dimensional(2D)materials offer a promising direction for next-generation MIR devices owing to their exotic optical properties,as well as the ultimate thickness *** importantly,van der Waals heterostructures-combining the best of various 2D materials at an artificial atomic level-provide many new possibilities for constructing MIR light-emitting devices of large tuneability and high ***,we introduce a simple but novel van der Waals heterostructure for MIR light-emission applications built from thin-film BP and transition metal dichalcogenides(TMDCs),in which BP acts as an MIR light-emission *** BP–WSe_(2) heterostructures,an enhancement of~200% in the photoluminescence intensities in the MIR region is observed,demonstrating highly efficient energy transfer in this heterostructure with type-Ⅰ band *** BP-MoS_(2) heterostructures,a room temperature MIR light-emitting diode(LED)is enabled through the formation of a vertical PN heterojunction at the *** work reveals that the BP-TMDC heterostructure with efficient light emission in the MIR range,either optically or electrically activated,provides a promising platform for infrared light property studies and applications.

关键词： light phosphorus constructing

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Quantum oscillations and quasilinear magnetoresistance in the topological semimetal candidate ScSn2

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Physical Review B 2021年第16期104卷 165128-165128页

作者： Y. Chen F. Tang W. Z. Meng X. Shen W. Zhao X. Q. Yin S. Cong Q. H. Yi L. Zhang D. J. Wu Z.-D. Han B. Qian X.-F. Jiang X. M. Zhang Y. Fang Jiangsu Laboratory of Advanced Functional Materials Department of Physics Changshu Institute of Technology Changshu 215500 China Jiangsu Key Laboratory of Thin Films School of Physical Science and Technology Soochow University Suzhou 215006 China School of Materials Science and Engineering Hebei University of Technology Tianjin 300130 China ISEM Innovation Campus University of Wollongong Wollongong New South Wales 2500 Australia Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering University of Macau Avenida da Universidade Taipa Macau SAR 999078 China Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education) Shenyang National Laboratory for Materials Science School of Physics and Astronomy and Tsung-Dao Lee Institute Shanghai Jiao Tong University Shanghai 200240 China

Novel compounds with two-dimensional square lattices formed by group IV or V elements (Si, Sn, Ge, Bi, and Sb) have been attracting a great deal of attention in recent times, mainly because of the possible emergence of various topological phases therein. Here, we successfully grow the single crystals of Sn-square-net based material ScSn2, and systematically perform their magnetization and magnetotransport measurements. Clear quantum oscillations emerge in the magnetization isotherms along different field orientations, from which nonzero Berry phases are extracted, implying that ScSn2 harbors three-dimensional Fermi surfaces and nontrivial electronic states. Similar to many other topological semimetals with extremely large magnetoresistance, ScSn2 shows field-induced resistivity enhancement as well, which has been proven to be not of a gap opening origin. Besides, at low temperature, large magnetoresistance with a quasilinear field dependence is observed. Our analysis of the magnetotransport data finds that the quasilinear magnetoresistance in ScSn2 cannot be understood by several familiar mechanisms proposed in the literature. These findings are expected to have far reaching implications for both the fundamental understanding and magnetoresistance device application of topological semimetal materials.

关键词： Magnetotransport Topological materials Weyl semimetal

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Natural van der Waals canalization lens for non-destructive nanoelectronic circuit imaging and inspection

arXiv

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arXiv 2025年

作者： Ou, Qingdong Xue, Shuwen Ma, Weiliang Yang, Jiong Si, Guangyuan Liu, Lu Zhong, Gang Liu, Jingying Xie, Zongyuan Xiao, Ying Kalantar-Zadeh, Kourosh Qi, Xiang Li, Peining Dai, Zhigao Chen, Huanyang Bao, Qiaoliang Faculty of Innovation Engineering Macau University of Science and Technology Macao Taipa999078 China Department of Materials Science and Engineering Monash University ClaytonVIC3800 Australia Department of Physics Xiamen University Xiamen361005 China National Engineering Research Center of Electromagnetic Radiation Control Materials Key Laboratory of Multi-spectral Absorbing Materials and Structures Ministry of Education University of Electronic Science and Technology of China Chengdu610054 China School of Optoelectronic Science and Engineering Collaborative Innovation Center of Suzhou Nano Science and Technology Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province Key Lab of Modern Optical Technologies Education Ministry of China Soochow University Suzhou215006 China Melbourne Centre for Nanofabrication Victorian Node of The Australian National Fabrication Facility ClaytonVIC3168 Australia Engineering Research Center of Nano-Geomaterials Ministry of Education Faculty of Materials Science and Chemistry China University of Geosciences Wuhan430074 China School of Chemical and Biomolecular Engineering The University of Sydney SydneyNSW Australia Hunan Key Laboratory for Micro-Nano Energy Materials and Devices School of Physics and Optoelectronic Xiangtan University Hunan411105 China Wuhan National Laboratory for Optoelectronics School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan430074 China Shenzhen Research Institute China University of Geosciences Shenzhen518063 China University of Shanghai for Science and Technology Shanghai200093 China Nanjing kLIGHT Laser Technology Co. Ltd. Jiangsu Nanjing210032 China

Optical inspection has long served as a cornerstone non-destructive method in semiconductor wafer manufacturing, particularly for surface and defect analysis. However, conventional techniques such as bright-field and dark-field scattering optics face significant limitations, including insufficient resolution and the inability to penetrate and detect buried structures. Atomic force microscopy (AFM), while offering higher resolution and precise surface characterization, is constrained by slow speed, limited to surface-level imaging, and incapable of resolving subsurface features. Here, we propose an approach that integrates the strengths of dark-field scattering optics and AFM by leveraging a van der Waals (vdW) canalization lens based on natural biaxial α-MoO3 crystals. This method enables ultrahigh-resolution subwavelength imaging with the ability to visualize both surface and buried structures, achieving a spatial resolution of 15 nm and grating pitch detection down to 100 nm. The underlying mechanism relies on the unique anisotropic properties of α-MoO3, where its atomic-scale unit cells and biaxial symmetry facilitate the diffraction-free propagation of both evanescent and propagating waves via a flat-band canalization regime. Unlike metamaterial-based superlenses and hyperlenses, which suffer from high plasmonic losses, fabrication imperfections, and uniaxial constraints, α-MoO3 provides robust and aberration-free imaging in multiple directions. We successfully applied this approach to achieve high-resolution inspection of buried nanoscale electronic circuits, offering unprecedented capabilities essential for next-generation semiconductor manufacturing. © 2025, CC BY-NC-ND.

关键词： Van der Waals forces

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Continuous and comprehensive atmospheric observations in Beijing:a station to understand the complex urban atmospheric environment

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Big Earth Data 2020年第3期4卷 295-321页

作者： Yongchun Liu Chao Yan Zemin Feng Feixue Zheng Xiaolong Fan Yusheng Zhang Chang Li Ying Zhou Zhuohui Lin Yishou Guo Ying Zhang Li Ma Wenshuo Zhou Zhikun Liu Lubna Dada Kaspar Dallenbach Jenni Kontkanen Runlong Cai Tommy Chan Biwu Chu Wei Du Lei Yao Yonghong Wang Jing Cai Juha Kangasluoma Tom Kokkonen Joni Kujansuu Anton Rusanen Chenjuan Deng Yueyun Fu Rujing Yin Xiaoxiao Li Yiqun Lu Yiliang Liu Chaofan Lian Dongsen Yang Weigang Wang Maofa Ge Yuesi Wang Douglas R.Worsnop Heikki Junninen Hong He Veli-Matti Kerminen Jun Zheng Lin Wang Jingkun Jiang Tuukka Petaja Federico Bianchi Markku Kulmala Aerosol and Haze Laboratory Beijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijingChina Institute for Atmospheric and Earth System Research/Physics Faculty of ScienceUniversity of HelsinkiHelsinkiFinland State Key Joint Laboratory of Environment Simulation and Pollution Control State Environmental Protection Key Laboratory of Sources and Control of Air Pollution ComplexSchool of EnvironmentTsinghua UniversityBeijingChina State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijingChina Department of Environmental Science&Engineering Fudan UniversityShanghaiChina State Key Laboratory for Structural Chemistry of Unstable and Stable Species Beijing National Laboratory for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijingChina Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Nanjing University of Information Science&TechnologyNanjingChina State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina Aerodyne Research Inc. BillericaMassachusettsUSA Institute of Physics University of TartuTartuEstonia Joint International Research Laboratory of Atmospheric and Earth System Sciences School of Atmospheric SciencesNanjing UniversityNanjingChina

Due to profound impact on climate and human health,air quality has attracted attention from all levels of the civil *** key step in the provision of required tools for the society to tackle the complex air quality problem is to characterize it in a comprehensive manner with a long-term ***,we describe a continuous and comprehensive observation station and its accompanying state-ofthe-art instrumentation that was established to investigate the complex urban atmospheric environment in a rapidly developing Chinese *** station,located in downtown Beijing,aims to study air quality by identifying the major atmospheric pollutants and key processes determining their formation and loss mechanisms.A few hundreds of parameters are continuously measured with the state-of-the-art instruments,including trace gas concentrations,aerosol particle size distributions,and mass concentrations,covering aerosol particle chemical composition from molecules to micrometer-sized aerosol *** produced long-term,comprehensive big data with around 1�10^(11)bytes per *** this paper,we provide an overview on the facilities of the station,the instrumentation used,the workflow of continuous observations and examples of results from 2018 to 2019 and a basis for establishing a modern long-term,comprehensive atmospheric urban observation station in other megacities.

关键词： Continuous and comprehensive atmospheric observation air pollution complex photochemical smog haze new particle formation

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Static and dynamical properties of the spin-5/2 nearly ideal triangular lattice antiferromagnet Ba3MnSb2O9

arXiv

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arXiv 2023年

作者： Shu, Mingfang Dong, Weicen Jiao, Jinlong Wu, Jiangtao Lin, Gaoting Kamiya, Yoshitomo Hong, Tao Cao, Huibo Matsuda, Masaaki Tian, Wei Chi, Songxue Ehlers, G. Ouyang, Zhongwen Chen, Hongwei Zou, Youming Qu, Zhe Huang, Qing Zhou, Haidong Ma, Jie Key Laboratory of Artificial Structures and Quantum Control School of Physics and Astronomy Shanghai Jiao Tong University Shanghai200240 China Collaborative Innovation Center of Advanced Microstructures Jiangsu Nanjing210093 China Neutron Scattering Division Oak Ridge National Laboratory Oak RidgeTN37831 United States Wuhan National High Magnetic Field Center Huazhong University of Science and Technology Wuhan430074 China Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field Laboratory Hefei Institutes of Physical Sciences Chinese Academy of Sciences Anhui Hefei230031 China Department of Physics and Astronomy University of Tennessee KnoxvilleTN37996 United States Wuhan National High Magnetic Field Center Huazhong University of Science and Technology Wuhan430070 China

We study the ground state and spin excitations in Ba3MnSb2O9, an easy-plane S = 5/2 triangular lattice antiferromagnet. By combining single-crystal neutron scattering, electric spin resonance (ESR), and spin wave calculations, we determine the frustrated quasi-two-dimensional spin Hamiltonian parameters describing the material. While the material has a slight monoclinic structural distortion, which could allow for isosceles-triangular exchanges and biaxial anisotropy by symmetry, we observe no deviation from the behavior expected for spin waves in the in-plane 120◦ state. Even the easy-plane anisotropy is so small that it can only be detected by ESR in our study. In conjunction with the quasi-two-dimensionality, our study establishes that Ba3MnSb2O9 is a nearly ideal triangular lattice antiferromagnet with the quasi-classical spin S = 5/2, which suggests that it has the potential for an experimental study of Z- or Z2-vortex excitations. Copyright © 2023, The Authors. All rights reserved.

关键词： Neutron scattering

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Chitosan/ZIF-8 interface-modified ammonium polyphosphate as core-shell additive for synergistically enhancing flame retardancy and degradation performance of polylactic acid

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International Journal of Biological Macromolecules 2025年

作者： Xinyu Cui Yichao Lin Shuchen Wang Ruiqi Li Jian Liu Jun Sun Ye-Tang Pan Sheng Zhang State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology Beijing 100029 China Guangdong Advanced Carbon Materials Co. Ltd Zhuhai Guangdong 519000 China Key Laboratory of Gas and Fire Control for Coal Mines State Key Laboratory of Coal Mine Disaster Prevention and Control China University of Mining and Technology Xuzhou Jiangsu 221116 China National Engineering Research Center of Flame Retardant Materials School of Materials Science & Engineering Beijing Institute of Technology Beijing 100081 China

Polylactic acid (PLA) is a promising renewable polymer material known for its excellent biodegradability and good mechanical properties. However, its easy flammability and slow natural degradation limit its further applications. In this work, we designed a multi-layer core-shell flame retardant (ZIF-8@CH@APP) with interfacial characteristics through organic-inorganic hybrid technology. The interfacial functionalization of inorganic flame retardant ammonium polyphosphate (APP) was carried out with bio-based chitosan (CH), and the three-dimensional network was constructed by in-situ growth of metal-organic framework (ZIF-8). With 7 wt% addition of ZIF-8@CH@APP, the PLA composite exhibited excellent flame retarded properties. It showed V -0 vertical burning (UL-94) grade, and reduced total smoke produce (TSP) (0.2 m 2 ). Additionally, the PLA/7 % ZIF-8@CH@APP composite exhibited higher degradation rate at mild condition. Additionally, the final degradation product of ZIF-8@CH@APP was confirmed to be DL-lactic acid. The design not only improves the interface compatibility between inorganic phase and polymer matrix, but also realizes the double breakthrough of flame retardant and catalytic degradation function through physical-chemical synergism, providing an innovative solution for the recycle of PLA material.

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Ecological risks of biodegradable plastics

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Science 2025年第6751期388卷 1034页

作者： Xiaoli Zhao Xiaowei Wu Qi Wang Fengchang Wu State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing China. Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Science and Engineering Nanjing University of Information Science and Technology Nanjing China. National Key Laboratory of Advanced Polymer Materials Polymer Research Institute Sichuan University Chengdu China.

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