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AI-enabled Lorentz microscopy for quantitative imaging of nanoscale magnetic spin textures

npj Computational materials 2024年第1期10卷 2102-2111页

作者： Arthur.R.C.McCray Tao Zhou Saugat Kandel Amanda Petford-Long Mathew J.Cherukara Charudatta Phatak Materials Science Division Argonne National LaboratoryLemontILUSA Applied Physics Program Northwestern UniversityEvanstonILUSA Center for Nanoscale Materials Argonne National LaboratoryLemontILUSA Advanced Photon Source Argonne National LaboratoryLemontILUSA Department of Materials Science and Engineering Northwestern UniversityEvanstonILUSA

The manipulation and control of nanoscale magnetic spin textures are of rising interest as they are potential foundational units in next-generation computing *** this requires a quantitative understanding of the spin texture behavior under external stimuli using in situ *** transmission electron microscopy(LTEM)enables real-space imaging of spin textures at the nanoscale,but quantitative characterization of in situ data is extremely ***,we present an AI-enabled phase-retrieval method based on integrating a generative deep image prior with an image formation forwardmodel for *** approach uses a single out-of-focus image for phase retrieval and achieves significantly higher accuracy and robustness to noise compared to existing ***,our method is capable of isolating sample heterogeneities from magnetic contrast,as shown by application to simulated and experimental *** approach allows quantitative phase reconstruction of in situ data and can also enable near real-time quantitative magnetic imaging.

关键词： textures magnetic Lorentz

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Excellent energy storage properties in non-stoichiometric Bi_(0.5)Na_(0.5)TiO_(3)-based relaxor ferroelectric ceramics

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Chinese Chemical Letters 2024年第7期35卷 470-472页

作者： Shunshun Jiang Ji Zhang Jing Wang Shan-Tao Zhang School of Materials Science and Engineering Nanjing University of Science&TechnologyNanjing 210094China State Key Laboratory of Mechanics and Control of Mechanical Structures College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China National Laboratory of Solid State Microstructures Department of Materials Science and EngineeringCollege of Engineering and Applied Science&Jiangsu Key Laboratory of Artificial Functional Materials&Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China

The rapid development of high-power and pulsed-power techniques inspires extensive investigates on high-performance ceramic-based ***,the low recoverable energy density(Wrec)hampers their wider ***,the non-stoichiometric Bi_(0.5)Na_(0.5)TiO_(3)-based ceramics were designed and *** proper introduction of oxygen vacancies facilitated activating defect dipole,giving rise to reduced remanent ***,the optimal composition exhibited an exceptional high Wrec of 8.3 J/cm^(3),a high efficiency of 85%,and excellent anti-fatigue and thermal *** work provides an efficient approach to explore ceramic capacitors with high capacitive energy storage performances.

关键词： Non-stoichiometric Bi_(0.5)Na_(0.5)TiO_(3) Ceramic capacitor Energy density Thermal stability

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Machine learning of organic solvents reveals an extraordinary axis in Hansen space as indicator of spherical precipitation of polymers

Aggregate

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Aggregate 2023年第5期4卷 207-213页

作者： Yuta Ihara Hiroshi Yamagishi Masanobu Naito Yohei Yamamoto Department of Materials Science Faculty of Pure and Applied Sciencesand Tsukuba Research Center for Energy Materials Science(TREMS)University of TsukubaTsukubaJapan Research and Services Division of Materials Data and Integrated System(MaDIS) National Institute for Materials Science(NIMS)TsukubaJapan Program in Materials Science and Engineering Graduate School of Pure and Applied SciencesUniversity of TsukubaTsukubaJapan

Machine learning is an emerging tool in the field of materials chemistry for uncovering a principle from large ***,we focus on the spherical precipitation behavior of polymers and computationally extract a hidden trend that is orthogonal to the availability bias in the chemical *** constructing a dataset,four polymers were precipitated from 416 solvent/nonsolvent combinations,and the morphology of the resulting precipitates were *** dataset was subjected to computational investigations consisting of principal component analysis and machine learning based on random forest model and support vector ***,we eliminated the effect of the availability bias and found a linear combination of Hansen parameters to be the most suitable variable for predicting precipitation *** predicted appropriate solvents are those with low hydrogen bonding capability,low polarity,and small molecular ***,we found that the capability for spherical precipitation is orthogonal to the availability bias and forms an extraordinary axis in Hansen space,which is the origin of the conventional difficulty in identifying the *** extraordinary axis points toward a void region,indicating the potential value of synthesizing novel solvents located therein.

关键词： chemical space computational chemistry machine learning polymers precipitation

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Biomimetic 3D printing of photocrosslinkable biodegradable elastomers-modified hybrid scaffolds as instructive platforms for bone tissue regeneration

Smart Materials in Medicine

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Smart materials in Medicine 2025年第1期6卷 95-107页

作者： Zhou, Panyu Wang, Jiayi Wang, Hongrui Pan, Hao Shi, Hengsong Fu, Yu Yuan, Yuan Wang, Yang Gan, Qi Liu, Changsheng Department of Orthopedics Changhai Hospital Naval Medical University Shanghai200082 China School of Materials Science and Engineering Key Laboratory for Ultrafine Materials of Ministry of Education and Engineering Research Center for Biomedical Materials of Ministry of Education East China University of Science and Technology Shanghai200237 China School of Aerospace Engineering and Applied Mechanics Tongji University Zhangwu Road 100 Shanghai200092 China

3D printing is regarded as an ideal method for large-scale bone defect repair. A rapid curing rate and strong mechanical properties throughout the product's shelf life are key development goals in 3D-printed bone repair biomaterials. To achieve this goal, we developed a 3D-printable organic/inorganic composite ink featuring rapid curing and highly customizable properties. After 3D printing, the nanocomposite ink of poly (glyceryl sebacate)-2-chlorocinnamoyl chloride/β-tricalcium phosphate (PGS-CC/β-TCP) undergoes short-term light crosslinking to form a biomimetic network of inorganic-organic composite materials. The resulting bone repair scaffold possesses excellent mechanical properties, significantly promotes cell adhesion and proliferation, and demonstrates good in vitro osteogenic activity, angiogenic performance, and mineralization capability. Moreover, the PGS-CC/β-TCP 3D-printed scaffold exhibits good degradation performance, retaining its mechanical properties even after four weeks of degradation. The PGS-CC(1:2)/β-TCP composite scaffold can effectively repair severe cranial bone defects in rats, showing optimal in vivo osteogenic and degradation performance at 6 and 12 weeks. With these advantages, this innovative 3D-printed biomaterial has great clinical application prospects for large segment bone repair and provides new opportunities for other complex reconstructions. © 2025 The Authors

关键词： Bone

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Symmetry breaking in spoke double-ring structures formed by buckling-guided 3D assembly

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Theoretical & applied mechanics Letters 2025年第1期15卷 25-31页

作者： Xiaoran Yang Jianzhong Zhao Alexander Hartmaier Yonggang Huang Yihui Zhang Applied Mechanics Laboratory Department of Engineering MechanicsTsinghua UniversityBeijing 100084China Laboratory of Flexible Electronics Technology Tsinghua UniversityBeijing 100084China Interdisciplinary Center for Advanced Materials Simulation(ICAMS) Ruhr-Universität BochumBochum 44801Germany Department of Civil and Environmental Engineering Northwestern UniversityEvanstonIL 60208USA Department of Mechanical Engineering Northwestern UniversityEvanstonIL 60208USA Department of Materials Science and Engineering Northwestern UniversityEvanstonIL 60208USA

The buckling-guided three-dimensional(3D)assembly method has arisen increasing attention for its advantages in forming complex 3D architectures with a rich diversity of geometric shapes in a broad spectrum of inorganic functional *** an assembly method relies on the controlled lateral bucking of a 2D precursor structure integrated with a pre-stretched substrate at selective *** the assembly process,the preservation or break-ing of rotational symmetry is crucial for understanding the mechanism of 2D-to-3D geometric ***,we present a fundamental study on the rotational symmetry of 3D spoke double-ring structures formed through buckling-guided *** energetic method is introduced to analyze the rotational symmetry and to understand the symmetry-breaking *** symmetry-breaking phenomenon is validated by experi-ments and finite element analyses(FEA).Phase diagrams of the deformation mode are established to shed light on the influences of various geometric parameters(e.g.,initial rotational symmetry order,radius ratio,and lo-cation of bonding sites).This work offers new insights into the underlying mechanism of 2D-to-3D geometric transformation in ribbon-type structures formed by compressive buckling.

关键词： Buckling-guided 3D assembly Rotational symmetry Post-buckling Instability

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Bending the Rule: Naphthobisthiadiazole-Based Terpolymers with Both High Solubility and Crystallinity for Organic Photovoltaics

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ACS applied Polymer materials 2024年第5期6卷 2586-2593页

作者： Chou, Li-Hui Chen, Fengkun Nakano, Kyohei Yamanaka, Kodai Mikie, Tsubasa Saito, Masahiko Liu, Cheng-Liang Tajima, Keisuke Osaka, Itaru Department of Applied Chemistry Graduate School of Engineering Hiroshima University Hiroshima Higashi-Hiroshima739-8527 Japan Department of Chemical and Materials Engineering National Central University Taoyuan32001 Taiwan Saitama Wako351-0198 Japan Applied Chemistry Program Graduate School of Advanced Science and Engineering Hiroshima University Hiroshima Higashi-Hiroshima739-8527 Japan Department of Materials Science and Engineering National Taiwan University Taipei10617 Taiwan

Achieving a good balance between the crystallinity and solubility is of great importance in the design of π-conjugated polymers. Here, we synthesized a series of terpolymers in which small fractions of a planar V-shaped fused ring, triphenyleno[1,2-c:7,8-c′]bis([1,2,5]thiadiazole) (TPTz), are incorporated into the linear-shaped backbone of a highly crystalline polymer based on naphtho[1,2-c:5,6-c′]bis([1,2,5]thiadiazole) (NTz), PNTz4T. Due to the "bending" structure induced by the TPTz unit, the terpolymers had greatly improved solubility by about 5-9 times compared to the linear-shaped PNTz4T. In particular, the terpolymers preserved the crystallinity of PNTz4T to a considerable extent with a higher fraction of face-on oriented domains in films. As a result, the highly solution-processable terpolymers exhibited high photovoltaic performances and slightly outperformed PNTz4T. Our results indicate that the incorporation of a V-shaped unit into a linearly shaped polymer is a good strategy to develop π-conjugated polymers with high solubility and crystallinity. © 2024 American Chemical Society.

关键词： Solubility

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Advancing smart dry adhesives with shape memory polymers

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International Journal of Smart and Nano materials 2025年第1期16卷 103-143页

作者： Changhong Linghu Tong Mu Wei Zhao Yangchengyi Liu K.Jimmy Hsia Jinsong Leng Huajian Gao School of Mechanical and Aerospace Engineering Nanyang Technological UniversitySingapore Centre of Composite Materials and Structures Harbin Institute of Technology(HIT)HarbinPeople’s Republic of China Department of Astronautical Science and Mechanics Harbin Institute of Technology(HIT)HarbinPeople’s Republic of China School of Chemistry Chemical Engineering and BiotechnologyNanyang Technological UniversitySingapore Mechano-X Institute Applied Mechanics LaboratoryDepartment of Engineering MechanicsTsinghua UniversityBeijingChina

Smart dry adhesives,a rapidly growing class of intelligent materials and structures,are engineered to provide strong,robust adhesion when needed while also allowing for controlled,easy detachment in response to specific *** smart adhesives,often exemplified by fibrillar structures made of elastomers,face a number of *** include limitations on maximum adhesion strength imposed by microstructural dimensions,restricted adaptability to surfaces with varying degrees of roughness,and an inherent trade-off between adhesion strength and *** review explores how shape memory polymers(SMPs)can address these challenges and,through their rubber-to-glass(R2G)transition capability,provide a powerful foundation for the next generation of smart dry ***,we summarize and elucidate the mechanisms by which SMPs enhance adhesion strength and switchability through material characteristics such as tunable stiffness,shape-locking,and shape-memory ***,we discuss a wide range of innovative designs and applications of SMP adhesives,offering insights into the ongoing challenges and emerging opportunities in this rapidly evolving field.

关键词： Smart dry adhesive shape memory polymer R2G adhesion adhesion strength adhesion switchability

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Improvement of Interference Fringes Analysis to Obtain Accurate Soret Coefficients

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Defect and Diffusion Forum 2025年 439卷 291-304页

作者： Horikoshi, Haruki Orikasa, Isamu Kataoka, Minami Inatomi, Yuko Suzuki, Shinsuke Department of Applied Mechanics and Aerospace Engineering Waseda University Tokyo169-8555 Japan Department of Materials Science Waseda University Tokyo169-8555 Japan Kagami Memorial Research Institute of Materials Science and Technology Waseda University Tokyo169-8555 Japan Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Kanagawa252-5210 Japan Space and Astronautical Science The Graduate University for Advanced Studies SOKENDAI Kanagawa252-5210 Japan

In this study, we proposed a moved-view analysis, a method for obtaining the Soret coefficient ST by analyzing the interference fringe change during field-of-view movement in the steady state. This analysis was designed to solve the problem that the sign of the concentration gradient could also be reversed if the plot of the concentration distribution was only slightly shifted owing to the narrow field of view. The data obtained from the experiment conducted to measure ST at the International Space Station were analyzed using moved-view analysis. For the moved-view analysis, the linearity of the concentration distribution induced by the Soret effect is larger than that for the method without field-of-view movement, and a more reliable ST can be obtained. The analysis error that sometimes occurred when the laser wavelength switched led to the underestimation of the phase change Δ, resulting in generating the data with low linearity. This unreliable data should be removed. © 2025 Trans Tech Publications Ltd, All Rights Reserved.

关键词： Interferometers

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Chiral phonon-induced magnetization in cerium fluorides

Chiral phonon-induced magnetization in cerium fluorides

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CLEO: Fundamental science, CLEO:FS 2024 - Part of Conference on Lasers and Electro-Optics, CLEO 2024

作者： Luo, Jiaming Lin, Tong Zhang, Junjie Chen, Xiaotong Blackert, Elizabeth R. Xu, Rui Yakobson, Boris I. Zhu, Hanyu Department of Materials Science and Nano Engineering Rice University Houston United States Applied Physics Graduate Program Rice University Houston United States

We report that circularly polarized terahertz light pulses can drive chiral phonons, which then induce an effective quasi-static magnetic field on the order of 1 tesla to polarize the paramagnetic cerium fluoride. ... 详细信息

ISBN: (纸本)9781957171395

关键词： Phonons

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Ultrafast dynamics of chiral phonons in tungsten disulfide

Ultrafast dynamics of chiral phonons in tungsten disulfide

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CLEO: Fundamental science, CLEO:FS 2024 - Part of Conference on Lasers and Electro-Optics, CLEO 2024

作者： Lin, Tong Chen, Xiaotong Xu, Rui Luo, Jiaming Zhu, Hanyu Department of Materials Science and Nano Engineering Rice University Houston United States Applied Physics Graduate Program Rice University Houston United States

Linearly and circularly polarized phonons in monolayer WS2 are directly excited by resonant infrared pulses. The dynamics of coherent and incoherent chiral phonons are measured by time-resolved Raman spectroscopy and ... 详细信息

ISBN: (纸本)9781957171395

关键词： Time-resolved spectroscopy

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