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Correction: Materials laboratories of the future for alloys, amorphous, and composite materials (MRS Bulletin, (2025), 50, 2, (190-207), 10.1557/s43577-024-00846-y)

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MRS Bulletin 2025年 1-2页

作者： Banerjee, Sarbajit Meng, Y. Shirley Minor, Andrew M. Zhang, Minghao Zaluzec, Nestor J. Chan, Maria K.Y. Seidler, Gerald McComb, David W. Agar, Joshua Mukherjee, Partha P. Melot, Brent Chapman, Karena Guiton, Beth S. Klie, Robert F. McCue, Ian D. Voyles, Paul M. Robertson, Ian Li, Ling Chi, Miaofang Destino, Joel F. Devaraj, Arun Marquis, Emmanuelle A. Segre, Carlo U. Liu, Huinan H. Yang, Judith C. Momeni, Kasra Misra, Amit Abdolrahim, Niaz Medvedeva, Julia E. Cai, Wenjun Sehirlioglu, Alp Dizbay-Onat, Melike Mehta, Apurva Graham-Brady, Lori Maruyama, Benji Rajan, Krishna Warner, Jamie H. Taheri, Mitra L. Kalinin, Sergei V. Reeja-Jayan, B. Schwarz, Udo D. Simon, Sindee L. Brown, Craig M. Department of Chemistry and Department of Materials Science & Engineering Texas A & M University College Station United States Pritzker School of Molecular Engineering The University of Chicago Chicago United States Department of Materials Science & Engineering University of California Berkeley Berkeley United States National Center for Electron Microscopy Molecular Foundry Lawrence Berkeley National Laboratory Berkeley United States Center for Nanoscale Materials Argonne National Laboratory Lemont United States Department of Physics University of Washington Seattle United States Department of Materials Science & Engineering The Ohio State University Columbus United States Department of Mechanical Engineering and Mechanics Drexel University Philadelphia United States School of Mechanical Engineering Purdue University West Lafayette United States Department of Chemistry University of Southern California Los Angeles United States Department of Chemistry Stony Brook University The State University of New York Stony Brook United States Department of Chemistry University of Kentucky Lexington United States Department of Physics University of Illinois at Chicago Chicago United States Department of Materials Science & Engineering Northwestern University Evanston Bangladesh Department of Materials Science & Engineering University of Wisconsin–Madison Madison United States Department of Materials Science and Engineering University of Pennsylvania Philadelphia United States Department of Mechanical Engineering and Materials Science Duke University Durham United States Department of Chemistry Creighton University Omaha United States Physical and Computational Sciences Directorate Pacific Northwest National Laboratory Richland United States Department of Materials Science & Engineering University of Michigan–Ann Arbor Ann Arbor United States Department of Physics Illinois Institute of Technology Chicago United States Department of Bioengineering and the Mater

This article was updated to correct Minghao Zhang’s affiliation from "Pritzker School of Molecular engineering, The University of Chicago, Chicago, USA" to "Pritzker School of Molecular engineering, The University of Chicago, Chicago, USA;Argonne National Laboratory, Lemont, USA." Argonne National Laboratory was left off the original publication. © The Author(s) 2025.

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Computational Modeling of Cardiovascular-Induced Chest Vibrations: A Review and Practical Guide for Seismocardiography Simulation

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International Journal for Numerical Methods in Biomedical engineering 2025年第5期41卷 e70047页

作者： Monfared, Mohammadali Gamage, Peshala T. Loghmani, Ali Taebi, Amirtahà Department of Bioengineering Lehigh University Bethlehem PA United States Biomedical Engineering Program Mississippi State University Mississippi State Mississippi United States Department of Biomedical Engineering and Science Florida Institute of Technology Melbourne FL United States Department of Mechanical Engineering Isfahan University of Technology Isfahan Esfahan Iran

This paper presents a comprehensive examination of finite element modeling (FEM) approaches for seismocardiography (SCG), a non-invasive method for assessing cardiac function through chest surface vibrations. The paper provides a comparative analysis of existing FEM approaches, exploring the strengths and challenges of various modeling choices in the literature. Additionally, we introduce a sample framework for developing FEM models of SCG, detailing key methodologies from governing equations and meshing techniques to boundary conditions and material property selection. This framework serves as a guide for researchers aiming to create accurate models of SCG signal propagation and offers insights into capturing complex cardiac mechanics and their transmission to the chest surface. By consolidating the current methodologies, this paper aims to establish a reference point for advancing FEM-based SCG modeling, ultimately improving our understanding of SCG waveforms and enhancing their reliability and applicability in cardiovascular health assessment. © 2025 The Author(s). International Journal for Numerical Methods in Biomedical engineering published by John Wiley & Sons Ltd.

关键词： computational modeling finite element modeling heart vibrations seismocardiography

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Electrocatalysis for sustainable nitrogen management: materials innovation for sensing, removal and upcycling technologies

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Science China Chemistry 2025年第6期 2322-2342页

作者： Mei Yi Hongmei Li Minghao Xie Panpan Li Zhaoyu Jin Guihua Yu Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China College of Materials Science and Engineering and College of Chemistry Sichuan University Materials Science and Engineering Program and Walker Department of Mechanical Engineering The University of Texas at Austin

The global nitrogen cycle holds immense importance due to its crucial role in supporting life, supplying vital nutrients for plant growth, preserving environmental balance, and enabling the proper functioning of ecosystems. However, human activities frequently disrupt this cycle, leading to the accumulation of nitrates and nitrites in water bodies. This accumulation causes environmental pollution and health risks. Traditional methods for treating nitrogen pollution, including biological, physical, and chemical approaches, have inherent limitations. In recent years, electrocatalysis has emerged as a promising and sustainable approach for nitrogen management. This technology offers superior efficiency, high selectivity, and environmental *** not only enables accurate detection of nitrogen pollutants in the environment but also facilitates their conversion into harmless nitrogen gas. Moreover, recent advancements have focused on the upcycling of nitrogen pollutants into valuable compounds,such as ammonia and urea. In this comprehensive review, we showcase the applications of electrocatalysis in sustainable nitrogen management. Specifically, we highlight its use in the sensing, removal, and upcycling of major nitrogen pollutants,including nitrate（NO3-）, nitrite（NO2-）, and nitric oxide（NO）. We discuss the use of catalysts, such as Pd alloys, Cu-based, and Fe-based materials, in electrochemical sensing and catalysis. Additionally, we explore recent advancements in the conversion of nitrogen pollutants into valuable compounds like ammonia and urea. The review also addresses current challenges and future opportunities in the field, including innovations in sensor and catalyst design, as well as large-scale treatment strategies. We anticipate that these perspectives will provide profound insights for effective nitrogen pollution control and sustainable utilization of nitrogen resources.

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Improving self-healing characteristics of polyurethane composite coatings by surface modification of polyaniline using dodecylamine

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engineering Failure Analysis 2025年 176卷

作者： Ahmad, Shoaib Nawaz, Muddasir Mohammad, Solaiman Al-Qahtani, Noora Kahraman, Ramazan Mansoor, Bilal Shakoor, R.A. Qatar University Doha2713 Qatar Materials Science & Technology Program College of Arts & Sciences Qatar University Doha2713 Qatar Department of Mechanical and Industrial Engineering Qatar University Doha2713 Qatar Department of Chemical Engineering College of Engineering Qatar University Doha2713 Qatar Qatar University Doha2713 Qatar Department of Materials Science and Engineering Texas A&M University College Station United States

Corrosion is one of the most critical problems affecting the structural integrity of metals. Polymeric nanocomposite coatings reinforced with anti-corrosive pigments are currently being used to mitigate corrosion. This study involves the synthesis of polyaniline (PANI) nanoparticles and their modification with dodecylamine (DOC), which functions as a corrosion inhibitor. Polyurethane coatings (PU-PANI@DOC) were developed by incorporating modified nanoparticles (PANI@DOC) into the polyurethane matrix, and blank polyurethane coatings (PU-blank) were prepared without any nanoparticles. Fourier-transform infrared spectroscopy (FTIR), Transmission electron microscopy, and Scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM/EDX) analysis confirmed the successful modification of dodecylamine (DOC) with the surface of polyaniline (PANI) nanoparticles. The electrochemical impedance spectroscopy (EIS) and salt spray test (SST) revealed that the impedance values of the modified coating follow an inclined trend (1010 Ω.cm2) in comparison with PU-blank coatings (107 Ω.cm2) after the 14th day of immersion in 3.5 wt% NaCl. Moreover, the hydrophobic characteristics of PANI@DOC nanoparticles shift the contact angle from 60° to 90°, thus lowering the wettability nature of modified coatings. Overall, Polyurethane coatings (PU-PANI@DOC) exhibiting potential attributes such as barrier properties, hydrophobic nature, inhibition effect, and high compatibility with polyurethane matrix can be a suitable material for the development of smart self-healing coatings to protect the metals from the hostile effects of corrosion. © 2025 Elsevier Ltd

关键词： Fourier transform infrared spectroscopy

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Mechanisms of rectangular groove-induced multiple-microdroplet coalescences

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Acta Mechanica Sinica 2017年第3期33卷 585-594页

作者： Feng Shen Yi Li Guiren Wang Zhaomiao Liu College of Mechanical Engineering and Applied Electronics Technology Beijing University of Technology Department of Mechanical Engineering and Biomedical Engineering Program University of South Carolina

The mechanism of microdroplet coalescence is a fundamental issue for droplet-based microfluidics. We developed an asymmetric expansion (a rectangular groove) along one side of a microchannel to achieve multiple-microdroplet trapping, collision, and coalescence. Compared with reported symmetric expansions, this asymmetric groove could easily trap microdroplets and control two or three microdroplet coalescences precisely without a requirement for temporal and spatial synchronization. To reveal the mechanisms of multiple-droplet coalescences in a groove, we observed five different coalescence patterns under different flow conditions. Moreover, we characterized the flow behavior quantitatively by simulating the velocity vector fields in both the microdroplets and continuous phase, finding good agreement with experiments. Finally, a map of coalescence forms with different capillary numbers () and flow ratios () was obtained. The results could provide a useful guidance for the design and application of droplet-based microfluidic devices.

关键词： Droplet-based microfluidics Microdroplet coalescence Microgroove Velocity vector field Asymmetric expansion

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Following marginal stability manifolds in quasilinear dynamical reductions of multiscale flows in two space dimensions

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Physical Review E 2025年第2期111卷 025105-025105页

作者： Alessia Ferraro Gregory P. Chini T. M. Schneider Emergent Complexity in Physical Systems Laboratory (ECPS) École Polytechnique Fédérale de Lausanne CH-1015 Lausanne Switzerland Nordita Royal Institute of Technology and Stockholm University Stockholm 106 91 Sweden Department of Mechanical Engineering and Program in Integrated Applied Mathematics University of New Hampshire Durham New Hampshire 03824 USA

We derive a two-dimensional (2D) extension of a recently developed formalism for slow-fast quasilinear (QL) systems subject to fast instabilities. The emergent dynamics of these systems is characterized by a slow evolution of (suitably defined) mean fields coupled to marginally stable, fast fluctuation fields. By exploiting this scale separation, an efficient hybrid fast-eigenvalue/slow-initial-value solution algorithm can be developed in which the amplitude of the fast fluctuations is slaved to the slowly evolving mean fields to ensure marginal stability—and temporal scale separation—is maintained. For 2D systems, the fluctuation eigenfunctions are labeled by their Fourier wave numbers characterizing spatial variability in that extended spatial direction, and the marginal mode(s) must coincide with the fastest-growing mode(s) over all admissible Fourier wave numbers. Here we derive an ordinary differential equation governing the slow evolution of the wave number of the fastest-growing fluctuation mode that simultaneously must be slaved to the mean dynamics to ensure the mode has zero growth rate. We illustrate the procedure in the context of a 2D model partial differential equation that shares certain attributes with the equations governing strongly stratified shear flows and other strongly constrained forms of geophysical turbulence in extreme parameter regimes. The slaved evolution follows one or more marginal stability manifolds, which constitute select state-space structures that are not invariant under the full flow dynamics yet capture quasicoherent structures in physical space in a manner analogous to invariant solutions identified in, e.g., transitionally turbulent shear flows. Accordingly, we propose that marginal stability manifolds are central organizing structures in a dynamical systems description of certain classes of multiscale flows in which scale separation justifies a QL approximation of the dynamics.

关键词： Shear flow

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Transient rod-climbing in an Oldroyd-B fluid

arXiv

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arXiv 2025年

作者： Ruangkriengsin, Tachin Brandão, Rodolfo Wu, Katie Hwang, Jonghyun Boyko, Evgeniy Stone, Howard A. Program in Applied and Computational Mathematics Princeton University PrincetonNJ08544 United States School of Mathematics University of Bristol Fry Building Woodland Road BristolBS8 1UG United Kingdom Department of Mechanical and Aerospace Engineering Princeton University PrincetonNJ08544 United States Faculty of Mechanical Engineering Technion – Israel Institute of Technology Haifa3200003 Israel

The Weissenberg effect, or rod-climbing phenomenon, occurs in non-Newtonian fluids where the fluid interface ascends along a rotating rod. Despite its prominence, theoretical insights into this phenomenon remain limited. In earlier work, Joseph & Fosdick (Arch. Rat. Mech. Anal., vol. 49, 1973, pp. 321–380) employed domain perturbation methods for second-order fluids to determine the equilibrium interface height by expanding solutions based on the rotation speed. In this work, we investigate the time-dependent interface height through asymptotic analysis with dimensionless variables and equations using the Oldroyd-B model. We begin by neglecting surface tension and inertia to focus on the interaction between gravity and viscoelasticity. In the small-deformation scenario, the governing equations indicate the presence of a boundary layer in time, where the interface rises rapidly over a short time scale before gradually approaching a steady state. By employing a stretched time variable, we derive the transient velocity field and corresponding interface profile on this short time scale and recover the steady-state profile on a longer time scale. Subsequently, we reintroduce small but finite inertial effects to investigate their interplay with viscoelasticity and propose a criterion for determining the conditions under which rod-climbing occurs. © 2025, CC BY.

关键词： Non Newtonian liquids

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HP40Nb reformer tube exposed to 950 °C – Machine learning informed microstructure evolution and multi-scale mechanical properties

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International Journal of Pressure Vessels and Piping 2025年 216卷

作者： Khan, Adnan Shunmugasamy, Vasanth C. Abuhelaiqa, Mousa Hamer, Wouter J. Laycock, Nicholas J. Mansoor, Bilal Department of Materials Science and Engineering Texas A&M University College StationTX United States Mechanical Engineering Program Texas A&M University at Qatar Doha Qatar Qatar Shell Research and Technology Center QSTP Doha Qatar Shell Global Solutions International B.V. Grasweg 31 Amsterdam1031 HW Netherlands

Austenitic stainless steel tubes extensively employed in energy sector, endure extreme service temperatures over long period of time and are susceptible to creep damage. This study investigates microstructural evolution and mechanical properties of HP40Nb (25Cr35Ni1Nb) steel exposed to 950 °C for up to 1600h, with specimens retrieved at 200h intervals. Advanced multi-scale characterization methods, including scanning electron microscopy, energy dispersive spectroscopy, and micro- and nanoindentation were utilized to analyze transformation of precipitates and resulting impact on mechanical properties. Microstructural changes (precipitate evolution, transformation and coarsening) were quantified using Machine Learning based algorithm and correlated with the mechanical properties. The as-cast microstructure comprised two primary intergranular Cr- and Nb-rich carbides in austenitic matrix. Post 200h exposure at 950 °C, secondary intragranular Cr-rich pepper carbide was observed in the austenite matrix. Following this, segregation of Si around Cr-rich precipitates occurred resulting in dark phases. At 800h, Si migrated to NbC resulting in transformation of NbC to Ni-Nb Silicide phase (G-phase). Transformation of NbC to G-phase and coarsening of the primary Cr-rich carbides was observed towards end of study at 1600h. The microstructural changes resulted in microcracks owing to precipitate transformation, coarsening and thermal coefficient mismatch. It was identified that both Nb and Cr precipitates are susceptible to microcracks post 800h at 950 °C. The study offers improved understanding of microstructural changes occurring in austenitic stainless steels used as reformer tubes during exposure to elevated service temperature. © 2025

关键词： Coarsening

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Production of cobalt- and manganese-based oxide nanofibers via solution blow spinning: Structural properties and high-performance oxygen evolution reaction

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Applied Surface Science 2025年 703卷

作者： Pereira, Thiago O. Raimundo, Rafael A. Alves, Ricardo F. Morales, Marco A. Simões, Thiago A. Medeiros, Eliton S. Macedo, Daniel A. Dutra, Ricardo P.S. Materials Science and Engineering Postgraduate Program Federal University of Paraíba PB João Pessoa58051-900 Brazil TEMA – Centre for Mechanical Technology and Automation Department of Mechanical Engineering University of Aveiro Aveiro3810-193 Portugal Department of Mechanical Engineering Federal University of Paraíba PB João Pessoa58051-900 Brazil Department of Theoretical and Experimental Physics Federal University of Rio Grande do Norte Natal59078-970 Brazil Cabo de Santo Agostinho PE 54518-430 Brazil Department of Materials Engineering Federal University of Paraíba PB João Pessoa58051-900 Brazil

Cobalt- and manganese-based oxides (Co3O4, MnCo2O4, and CoMn2O4) with nanofiber-like morphology were successfully synthesized via solution blow spinning (SBS) and evaluated as electrocatalysts for the oxygen evolution reaction (OER). The structural, morphological, and surface properties of the prepared materials were investigated through x-ray diffraction (XRD), field emission scanning electron microscope (FESEM), Fourier-transform infrared (FTIR), Raman spectroscopy, x-ray photoelectron spectra (XPS), and magnetic measurements. The magnetic characterization of MnCo2O4, CoMn2O4, and Co3O4 confirmed their phase purity and expected magnetic behavior. MnCo2O4 exhibited ferromagnetic ordering (θ = +145 K) with Hc = 8200 Oe and Ms = 11.9 emu/g at 5 K. CoMn2O4 showed multiple transitions at 178 K, 169 K, and 81 K, suggesting ferrimagnetic ordering. Co3O4 displayed antiferromagnetic behavior with a Néel temperature of 37 K. These results corroborate with the literature, validating the synthesis and characterization. X-ray photoelectron spectroscopy (XPS) analysis confirmed the oxidation states of Co and Mn and the presence of oxygen vacancies in CoMn2O4, MnCo2O4, and Co3O4. The Oads/Olats ratio indicated a higher concentration of oxygen vacancies in CoMn2O4 (1.21), while MnCo2O4 exhibited the highest Mn4+ content (Mn4+/Mn3+ = 0.76). The Co3+/Co2+ ratio was higher in MnCo2O4 (1.94), suggesting enhanced oxidation stability. The electrochemical characterization for OER in 1 M KOH electrolyte of the CoMn2O4, MnCo2O4, and Co3O4 samples displayed overpotentials of 330, 348, and 375 mV, respectively, to achieve a current density of 10 mA cm−2. Cyclic voltammetry and electrochemical impedance spectroscopy further corroborate these findings. The electrodes exhibited great stability maintaining their performance for 20 h. A detailed surface chemistry analysis showed that oxygen vacancy-rich samples exhibited enhanced charge transfer and generated Mn catalytic sites that facilitated

关键词： Fourier transform infrared spectroscopy

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Doping ratio between ZnO/MgO tunes antimicrobial, osteogenic, and anti-osteoclast activity of CaO-MgO-ZnO-SiO2 bioactive glass-ceramics

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Ceramics International 2025年

作者： Hung, Guan-Yi Xia, Yun-Ze Chen, Pin-Yi Lai, Po-Liang Feng, Kuei-Chih Tu, Chi-Shun Cheng, I.-C. Wang, Chi-Yun International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City24301 Taiwan Department of Physics Fu Jen Catholic University New Taipei City24205 Taiwan Department of Mechanical Engineering Ming-Chi University of Technology New Taipei City24301 Taiwan Bone and Joint Research Center Department of Orthopaedic Surgery Chang Gung Memorial Hospital Taoyuan City33305 Taiwan College of Medicine Chang Gung University Taoyuan City33305 Taiwan Department of Mechanical Engineering Chang Gung University Taoyuan City33305 Taiwan Research Center for Intelligent Medical Devices Ming Chi University of Technology New Taipei City243303 Taiwan

Limitations such as donor site morbidity hamper autologous bone grafts. On the other hand, allogeneic grafts, sourced from cadavers, pose risks of viral transmission and rejection. While hydroxyapatite is a prevalent synthetic graft material, antibiotic-laden fillers addressing infection face challenges with antibiotic-resistant pathogens, driving the emergence of nonantibiotic materials to combat persistent bone infections. Bioactive glass is a potential bone void filler superior to hydroxyapatite. Thus, to improve the antibacterial efficacy and bioactivity, we adjusted the doping ratio of the novel CaO-(1-x) MgO-(x) ZnO-SiO2 glass-ceramics (x = 0, 0.25, 0.50, 0.75, 1). Using XRD, we found a typical amorphous structure alongside polycrystalline diopside (CaMgSi2O6), hardystonite (Ca2ZnSi2O7), and petedunnite (CaZnSi2O6) formations. Raman spectroscopy revealed the silicate-glass matrix structure in all the Zn(100x) glass-ceramics and confirmed that the Zn ions replaced the Mg ions. Zn-doped glass-ceramics promoted apatite layer formation and had greater antibacterial efficacy against E. coli and S. aureus. Zn25 glass-ceramic were biocompatible with L929 and MC3T3-E1 cells. Furthermore, Zn25 glass-ceramic promoted bone cell mineralization and reduced osteoclast formation without affecting ALP activity. In vivo, the Zn25 glass-ceramic exhibited greater osteointegration ability than the HAP and Zn0 glass-ceramic. Taken together, the present study demonstrated that bioactive glass-ceramics with a doping ratio between ZnO and MgO (25:75) can enhance antibacterial and osteogenic activity while impeding osteoclastogenic activity. © 2025

关键词： Escherichia coli

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