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Realizing one-dimensional single-crystalline topological nanomaterials through thermomechanical epitaxy

Matter 2025年

作者： Liu, Naijia Yang, Yi-Xiang Lu, Cai Kube, Sebastian A. Raj, Arindam Sohn, Sungwoo Zhang, Xiaoyu Costa, Miguel B. Liu, Ze Schroers, Jan Department of Mechanical Engineering and Materials Science Yale University New HavenCT06520 United States Querrey Simpson Institute for Bioelectronics Northwestern University EvanstonIL60208 United States Department of Engineering Mechanics School of Civil Engineering Wuhan University Hubei Wuhan430072 China Department of Materials Science and Engineering University of Wisconsin - Madison MadisonWI53706 United States Yale University New HavenCT06520 United States Department of Applied Physics Yale University New HavenCT06520 United States Department of Materials Science and Metallurgy University of Cambridge CambridgeCB3 0FS United Kingdom

Applications and characterizations of topological materials benefit from nanostructures where enhanced surface-to-volume ratios amplify topological states. However, realizing one-dimensional topological nanomaterials has been limited by existing fabrication methods. Here, we present thermomechanical epitaxy (TME)—a general technique for fabricating one-dimensional topological nanomaterials. By applying pressure on bulk topological materials against rigid nanocavities, interface diffusion drives epitaxial growth of high-quality, single-crystalline nanowires at wafer scale. As this diffusional mechanism is prevalent across general materials, it enables a versatile approach to realize one-dimensional nanomaterials from a diverse spectrum of topological phases covering topological insulators and topological semimetals and realize one-dimensional nanomaterials that have not been achieved with state-of-the-art technology. Our theoretical framework predicts materials suitable for TME by correlating phase stability with pressure-induced chemical potential. The proposed method expands the accessible space of topological nanomaterials and bolsters the potential for advancements in physical science and next-generation nanodevices. © 2025

关键词： Single crystals

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Fabrication and bioactivity studies of wollastonite/polycaprolactone composites

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International Journal of Nano and Biomaterials 2023年第2期10卷 86-99页

作者： Lakshmi, R. Choudhary, Rajan Senatov, Fedor Kaloshkin, Sergey Kothandam, Shobana Ponnamma, Deepalekshmi Sadasivuni, Kishor Kumar Swamiappan, Sasikumar Department of Chemistry Auxilium College Tamil Nadu Vellore632006 India Faculty of Materials Science and Applied Chemistry Rudolfs Cimdins Riga Biomaterials Innovations and Development Centre of RTU Institute of General Chemical Engineering Riga Technical University Pulka St 3 RigaLV-1007 Latvia Baltic Biomaterials Centre of Excellence Headquarters at Riga Technical University Kipsala Street 6A RigaLV-1048 Latvia National University of Science and Technology "MISiS" Moscow119049 Russia Department of Chemistry School of Advanced Sciences Vellore Institute of Technology Tamil Nadu Vellore632014 India Materials Science and Technology Program Department of Mathematics Statistics and Physics College of Arts and Sciences Qatar University P.O. Box 2713 Doha Qatar Center for Advanced Materials Qatar University P.O. Box 2713 Doha Qatar Department of Chemistry School of Advanced Sciences Vellore Institute of Technology Tamil Nadu Vellore632014 India

Current work investigates the influence of wollastonite on mechanical stability and biomineralisation ability of wollastonite/ polycaprolactone (PCL) composites (WP composites). The solvent casting particulate leaching method was used to prepare these composites. FT-IR spectra indicated the presence of functional groups associated with PCL and wollastonite. Scanning electron microscopy showed aggregated morphology and wollastonite particles were embedded in the PCL matrix. The incorporation of wollastonite leads to a more than three-fold increase in the compressive strength of the composites. Moreover, the composites containing 50% wollastonite exhibited better compressive strength than 80%. This observation suggested that if the concentration of a filler is exceeded beyond its critical concentration then the mechanical stability of the composite will be compromised. The composites revealed good apatite deposition ability. Thus, the biomineralisation ability and compressive strength of PCL can be improved by preparing its composites with bioceramics. © 2023 Inderscience Enterprises Ltd.

关键词： Bioceramics

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Photonic structures in radiative cooling

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Light(science & Applications) 2023年第7期12卷 1187-1215页

作者： Minjae Lee Gwansik Kim Yeongju Jung Kyung Rok Pyun Jinwoo Lee Byung-Wook Kim Seung Hwan Ko Applied Nano and Thermal Science Lab Department of Mechanical EngineeringSeoul National University1 Gwanak-roGwanak-guSeoul 08826South Korea Electronic Device Research Team Hyundai Motor Group37Cheoldobangmulgwan-roUiwang-siGyeonggi-do 16082South Korea E-drive Materials Research Team Hyundai Motor Group37Cheoldobangmulgwan-roUiwang-siGyeonggi-do 16082South Korea Department of Mechanical Robotics and Energy EngineeringDongguk University30 pildong-ro 1-gilJung-guSeoul 04620South Korea. Department of Civil Engineering and Engineering Mechanics Columbia UniversityNew YorkNY 10027USA. Institute of Advanced Machinery and Design(SNU-IAMD)/lnstitute of Engineering Research Seoul National University1 Gwanak-roGwanak-guSeoul 08826South Korea

Radiative cooling is a passive cooling technology without any energy consumption,compared to conventional cooling technologies that require power sources and dump waste heat into the *** decades,many radiative cooling studies have been introduced but its applications are mostly restricted to nighttime use ***,the emergence of photonic technologies to achieves daytime radiative cooling overcome the performance *** example,broadband and selective emissions in mid-IR and high reflectance in the solar spectral range have already been *** review article discusses the fundamentals of thermodynamic heat transfer that motivates radiative *** photonic structures such as multilayer,periodical,random;derived from nature,and associated design procedures were thoroughly *** integration with new functionality significantly enhances the effciency of radiative cooling technologies such as colored,transparent,and switchable radiative cooling applications has been *** commercial applications such as reducing cooling loads in vehicles,increasing the power generation of solar cells,generating electricity,saving water,and personal thermal regulation are also ***,perspectives on radiative cooling and emerging issues with potential solution strategies are discussed.

关键词： radiative overcome transparent

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Lithiophilic Chemistry Facilitated Ultrathin Lithium for Scalable Prelithiation

SSRN

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SSRN 2023年

作者： Wang, Kuangyu Yang, Cheng Yuan, Ruichuan Xu, Fei Zhang, Yingchuan Ding, Tiezheng Yu, Maosheng Xu, Xinxiu Long, Yuanzheng Wu, Yulong Li, Lei Li, Xiaoyan Wu, Hui State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China Center for Advanced Mechanics and Materials Applied Mechanics Laboratory Department of Engineering Mechanics Tsinghua University Beijing100084 China Department of NanoEngineering University of California San DiegoCA92093 United States

Prelithiation techniques play a critical role in the advancement of high-energy-density batteries. Among these techniques, ultrathin lithium (UTL) has emerged as a promising prelithiation reagent for anodes. However, there remains a need to explore an adjustable, efficient, and cost-effective method for manufacturing UTL. In this study, we introduce a technique for producing UTL with adjustable thicknesses ranging from 1.5 μm to 10 μm using blade-coating of molten lithium on polyvinylidene fluoride-modified copper current collectors. By employing the transfer-printing method, we prepare prelithiated graphite and Si-C composite electrodes, which exhibit significantly improved initial coulombic efficiencies of 99.60% and 99.32% in half cells, respectively. Moreover, the energy densities of Li(NiCoMn)1/3O2 and LiFePO4 full cells assembled with the prelithiated graphite electrodes increase by 13.1% and 23.5%, respectively. © 2023, The Authors. All rights reserved.

关键词： Lithium compounds

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Birefringent response of graphene oxide film structurized via femtosecond laser

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Nano Research 2022年第5期15卷 4490-4499页

作者： Tingting Zou Bo Zhao Wei Xin Feiyue Wang Hongbo Xie Yuhang Li Yuwei Shan Kun Li Yanbing Sun Jianjun Yang The GPL Photonics Laboratory State Key Laboratory of Applied OpticsChangchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of UV-Emitting Materials and Technology Ministry of EducationNortheast Normal UniversityChangchun 130024China Department of Electronic Information and Physics Changzhi UniversityChangzhi 046011China Changchun New Industries Optoelectronics Technology Co. LtdChangchun 130103China

In-plane birefringent materials present an effective modulation of the optical properties and more degrees of freedom for the signal detection in low dimension,and thus remain a hot topic in realizing the integrated,miniature,and flexible devices for multiple ***,the artificial in-plane birefringence properties have been successfully achieved on a graphene oxide film by a novel femtosecond laser lithography method,which provides a high-speed,large-area,and regular subwavelength gratings(~380 nm)fabrication and *** obtained sample manifests an evident optical birefringence(~0.18)and anisotropic photoresponse(~1.21)in the visible range,both of which can be significantly modulated by either the structural morphology or the degree of oxide *** on the analysis of effective-medium theory and measurements of angle-resolved polarized Raman spectroscopy,the artificial in-plane birefringence is originated from various optical responses of the periodic subwavelength structures for the incident light with different polarization *** technique shows great advantages for the fabrication of integrated in-plane polarization-dependent devices,which is expected to solve the problems in this field,such as the deficient selection of materials,complex design of micro/nanostructure,and inflexible processing technology.

关键词： femtosecond laser lithography reduced graphene oxide subwavelength structures in-plane birefringence anisotropic photoresponse

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Understanding the effect of curvature on the magnetization reversal of three-dimensional nanohelices

arXiv

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arXiv 2023年

作者： Fullerton, John McCray, Arthur R.C. Petford-Long, Amanda K. Phatak, Charudatta Materials Science Division Argonne National Laboratory LemontIL United States Applied Physics Program Northwestern University EvanstonIL United States Department of Materials Science and Engineering Northwestern University EvanstonIL United States

Comprehending the interaction between geometry and magnetism in three-dimensional (3D) nanostructures is of importance to understand the fundamental physics of domain wall (DW) formation and pinning. Here, we use focused electron beam-induced deposition to fabricate magnetic nanohelices with increasing helical curvature with height. Using electron tomography and Lorentz transmission electron microscopy, we reconstruct the 3D structure and magnetization of the nanohelices. The surface curvature, helical curvature and torsion of the nanohelices are then quantified from the tomographic reconstructions. Furthermore, by using the experimental 3D reconstructions as inputs for micromagnetic simulations we can reveal the influence of surface and helical curvature on the magnetic reversal mechanism. Hence, we can directly correlate the magnetic behavior of a 3D nanohelix to its experimental structure. These results demonstrate how control of geometry in nanohelices can be utilized in the stabilization of DWs and control of the response of the nanostructure to applied magnetic fields. Copyright © 2023, The Authors. All rights reserved.

关键词： Magnetization reversal

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NOMAD: nonlinear manifold decoders for operator learning 22

NOMAD: nonlinear manifold decoders for operator learning

引用

Proceedings of the 36th International Conference on Neural Information Processing Systems

作者： Jacob H. Seidman Georgios Kissas Paris Perdikaris George J. Pappas Graduate Program in Applied Mathematics and Computational Science University of Pennsylvania Department of Mechanical Engineering and Applied Mechanics University of Pennsylvania Department of Electrical and Systems Engineering University of Pennsylvania

ISBN: (纸本)9781713871088

Supervised learning in function spaces is an emerging area of machine learning research with applications to the prediction of complex physical systems such as fluid flows, solid mechanics, and climate modeling. By directly learning maps (operators) between infinite dimensional function spaces, these models are able to learn discretization invariant representations of target functions. A common approach is to represent such target functions as linear combinations of basis elements learned from data. However, there are simple scenarios where, even though the target functions form a low dimensional submanifold, a very large number of basis elements is needed for an accurate linear representation. Here we present NOMAD, a novel operator learning framework with a nonlinear decoder map capable of learning finite dimensional representations of nonlinear submanifolds in function spaces. We show this method is able to accurately learn low dimensional representations of solution manifolds to partial differential equations while outperforming linear models of larger size. Additionally, we compare to state-of-the-art operator learning methods on a complex fluid dynamics benchmark and achieve competitive performance with a significantly smaller model size and training cost.

关键词：

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Implementation of 3D printing technology in the conditions of series production

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Procedia Structural Integrity 2024年 59卷 786-792页

作者： O.M. Zaika V.D Rud L.M. Samchuk Y.S. Povstiana N.T. Rud Department of Materials Science Lutsk National Technical University Lutsk 43018 Ukraine Department of Applied Mechanics and Mechatronics Lutsk National Technical University Lutsk 43018 Ukraine Department of Software Engineering Lutsk National Technical University Lutsk 43018 Ukraine Department of Economics Lutsk National Technical University Lutsk 43018 Ukraine

The nomenclature of parts used in the production of car wiring systems for BMW, MERCEDES, SKODA and other cars at the Ukrainian-German joint venture Kromberg & Schubert has up to 10,000 names. They are structurally diverse, ranging from simple parts such as rods and levers to body parts with internal holes, voluminous pockets and so on. Until recently, these parts were made from different compositions of metal. In use, they lost their effectiveness over time - wear of the working surfaces or destruction. Before the pandemic, used parts were replaced by ordering them from other companies. This practice proved to be inefficient: high costs of developing prototypes, transportation and testing under production conditions. One of the most promising directions in the development of modern engineering is the development of new technologies for rapid manufacturing. The essence of such technologies is the layer-by-layer construction of products from polymer materials on the basis of CAD models - models whose three-dimensional geometry is described in digital form using solid modelling programmes (SolidWorks, CATIA, ProE, AutoCAD, etc.). Trial batches of brackets produced at the company using such technologies showed the promise of adaptive technologies.

关键词： 3D printing harmful emissions energy efficiency print quality temperature mode serial production quality control

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Low voltage graphene interface engineered organic ferroelectric tunnel junction devices

arXiv

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arXiv 2025年

作者： Natani, S. Khajanji, P. Cheng, L. Eshraghi, K. Zhang, Z. Shipley, W. Tao, A. Bandaru, P.R. Department of Mechanical Engineering University of California San Diego La Jolla CA United States Program in Materials Science University of California San Diego La Jolla CA United States Applied Materials Santa ClaraCA United States

It has been indicated 1 that the path forward for the widespread usage of ferroelectric (FE) materials may be considerably facilitated through the reduction of programming voltages to on-chip logic compatible values o... 详细信息

关键词： Ferroelectric devices

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Uncertainty Quantification and Propagation for Multiscale materials Systems with Agglomeration and Structural Anomalies

SSRN

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SSRN 2024年

作者： Comlek, Yigitcan Mojumder, Satyajit van Beek, Anton Prabhune, Prajakta Ciampaglia, Alberto Apley, Daniel W. Brinson, L. Catherine Liu, Wing Kam Chen, Wei Department of Mechanical Engineering Northwestern University Evanston United States Theoretical and Applied Mechanics Program Northwestern University Evanston United States School of Mechanical and Materials Engineering University College Dublin Dublin Ireland Thomas Lord Department of Mechanical Engineering and Materials Science Duke University Durham United States Department of Mechanical and Aerospace Engineering Politecnico di Torino Turin Italy Department of Industrial Engineering and Management Sciences Northwestern University Evanston United States

Advancements in manufacturing technologies have enabled material system design optimization at multiple length scales. However, the microstructural anomalies and uncertainties present at each scale have not been considered comprehensively enough for systems to be robust to manufacturing variations. Consequently, considering anomalies at various length scales of the material’s structure and understanding their effects on a part’s response are crucial for designing engineered parts that are robust to various sources of uncertainty. In this work, an efficient bottom-up hierarchical uncertainty quantification and propagation framework bridging multiple scales to establish a design allowable range for the material system at the part-scale is presented. We demonstrate our framework on an additively manufactured polymer nanocomposite material system that is subject to anomalies at different length scales that impact the material properties. Specifically, agglomeration defects formed due to attractive forces between nanoparticles at the microscale and structural variabilities caused by the voids resulting from different processing conditions at the mesoscale are considered. The introduced hierarchical sampling framework combines (i) an innovative microstructure image characterization and reconstruction, (ii) a mechanistic reduced-order model that enables fast property predictions for high-dimensional microstructural design spaces, and (iii) efficient uncertainty quantification and propagation through Copula-based sampling across multiple length scales to reduce the sampling budget by 95%. Through validation of our method, we demonstrate the importance of considering the effects of process-induced microstructure features on the performance of a part. © 2024, The Authors. All rights reserved.

关键词： Microstructure

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