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Insights into Oxide Growth: In Situ Atomic-Scale Visualization of Mass Transport during Copper Oxidation

Microscopy and Microanalysis 2024年第SUPPLEMENT_1期30卷

作者： Qiao, Linna Wang, Jianyu Ye, Shuonan Chen, Xiaobo Li, Meng Zakharov, Dmitri N Kisslinger, Kim Yang, Judith C Zhou, Guangwen Materials Science and Engineering Program & Department of Mechanical Engineering State University of New York at Binghamton Binghamton New York United States Center for Functional Nanomaterials Brookhaven National Laboratory Upton New York United States

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Polyzwitterionic Hydrogels for Efficient Atmospheric Water Harvesting

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Angewandte Chemie 2022年第13期134卷

作者： Chuxin Lei Youhong Guo Weixin Guan Hengyi Lu Wen Shi Prof. Guihua Yu Materials Science and Engineering Program and Walker Department of Mechanical Engineering The University of Texas at Austin Austin TX 78712 USA

Atmospheric water harvesting (AWH) is regarded as one of the promising strategies for freshwater production desirable to provide sustainable water for landlocked and arid regions. Hygroscopic materials have attracted widespread attention because of their water harvesting performance. However, the introduction of many inorganic salts often leads to aggregation and leakage issues in practical use. Here, polyzwitterionic hydrogels are developed as an effective AWH material platform. Via anti-polyelectrolyte effects, the hygroscopic salt coordinated with polymer chains could capture moisture and enhance the swelling property, leading to a strong moisture sorption capacity. The hydrogel shows superior AWH performance (0.62 g g −1 , 120 minutes for equilibrium at 30 % relative humidity) and produces 5.87 L kg −1 freshwater per day. It is anticipated that the polyzwitterionic hydrogels with unique salt-responsive properties could provide new insights into the design and synthesis of next-generation AWH materials.

关键词： Anti-Polyelectrolyte Effects Atmospheric Water Harvesting Freshwater Production Polyzwitterionic Hydrogel

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Sorbents for Atmospheric Water Harvesting: From Design Principles to Applications

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Angewandte Chemie 2022年第43期134卷

作者： Wen Shi Weixin Guan Chuxin Lei Prof. Guihua Yu Materials Science and Engineering Program and Walker Department of Mechanical Engineering The University of Texas at Austin Austin TX 78712 USA

Water scarcity caused by climate change and population growth poses a grave threat to human society. Of the different water purification technologies put forward, one presents a promising strategy that is spatially or temporally non-restricted—atmospheric water harvesting (AWH). Here we review recent progress in the design and study of AWH sorbents, ranging from the innovative chemistries to the integration of sophisticated architectures and functional components, and clarify the structure–property–performance relationship that governs the water capture and release processes. Features and limitations of each type of sorbents are summarized to elucidate the optimal working environments and modes. Progress in applications extending from water generation to thermal management and agriculture are discussed. Future developments regarding material modifications, performance measurements, and system optimizations are provided to overcome lingering barriers to sorbent design and implementation.

关键词： Atmospheric Water Harvesting Clean Water Hydrogels Metal–Organic Frameworks Sorbents

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Compositionally Complex Perovskite Oxides for Solar Thermochemical Water Splitting

arXiv

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arXiv 2022年

作者： Zhang, Dawei De Santiago, Héctor A. Xu, Boyuan Liu, Cijie Trindell, Jamie Li, Wei Park, Jiyun Rodriguez, Mark A. Coker, Eric N. Sugar, Josh McDaniel, Anthony Lany, Stephan Ma, Liang Wang, Yi Collins, Gregory Tian, Hanchen Li, Wenyuan Qi, Yue Liu, Xingbo Luo, Jian Program of Materials Science and Engineering University of California San Diego La Jolla CA92093 United States Department of Mechanical and Aerospace Engineering Benjamin M. Statler College of Engineering and Mineral Resources West Virginia University MorgantownWV26506 United States Department of Physics Brown University ProvidenceRI02912 United States Sandia National Laboratories LivermoreCA94551 United States School of Engineering Brown University ProvidenceRI02912 United States Sandia National Laboratories AlbuquerqueNM87185 United States Materials Science Center National Renewable Energy Laboratory GoldenCO80401 United States School of Materials Science and Engineering Hebei University of Engineering Hebei Province Handan056038 China Department of Chemical and Biomedical Engineering Benjamin M. Statler College of Engineering and Mineral Resources West Virginia University MorgantownWV26506 United States Department of NanoEngineering University of California San Diego La Jolla CA92093 United States

Solar thermochemical hydrogen generation (STCH) is a promising approach for eco-friendly H2 production, but conventional STCH redox compounds often suffer from thermodynamic and kinetic limitations with limited tunability. Expanding from the nascent high-entropy ceramics field, this study explores a new class of compositionally complex perovskite oxides (La0.8Sr0.2)(Mn(1-x)/3Fe(1-x)/3CoxAl(1-x)/3)O3 for STCH. In situ X-ray diffraction demonstrates the phase stability during redox cycling and in situ X-ray photoelectron spectroscopy shows preferential redox of Co. The extent of reduction increases, but the intrinsic kinetics decreases, with increased Co content. Consequently, (La0.8Sr0.2)(Mn0.2Fe0.2Co0.4Al0.2)O3-δ achieves an optimal balance between the thermodynamics and kinetics properties. The combination of a moderate enthalpy of reduction, high entropy of reduction, and preferable surface oxygen exchange kinetics enables a maximum H2 yield of 395 ± 11 μmol g-1 in a short 1-hour redox duration. Entropy stabilization expectedly contributes to the structure stability during redox without phase transformation, which enables an exceptional STCH stability for >50 cycles under harsh interrupted conditions. The underlying redox mechanism is further elucidated by the density functional theory based parallel Monte Carlo computation, which represents a new computation paradigm first established here. This study suggests a new class of non-equimolar compositionally complex ceramics for STCH and chemical looping. © 2022, CC BY.

关键词： Entropy

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Regulating Zinc Deposition via Zincophilic 2D-Cu2Te as the Current Collector to Suppress Dendrite Formation toward High Performance Aqueous Zinc-Ion Batteries

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BATTERIES & SUPERCAPS 2023年第8期6卷

作者： Tsai, M-H Lin, T-Y Su, T-S Chen, G-M Liu, Y-c Chen, Y-Z Department of Materials Science and Engineering National Cheng Kung University Tainan City 70101 Taiwan Contribution: Investigation (equal) Contribution: Investigation (supporting) Department of Mechanical Engineering National Cheng Kung University Tainan City 70101 Taiwan Hierarchical Green-Energy Materials (Hi-GEM) Research Center National Cheng Kung University Tainan City 70101 Taiwan Program on Smart and Sustainable Manufacturing Academy of Innovative Semiconductor and Sustainable Manufacturing National Cheng Kung University Tainan City 70101 Taiwan Program on Semiconductor Packaging and Testing Academy of Innovative Semiconductor and Sustainable Manufacturing National Cheng Kung University Tainan City 70101 Taiwan Core Facility Center National Cheng Kung University Tainan City 70101 Taiwan Contribution: Supervision (supporting) Program on Key Materials Academy of Innovative Semiconductor and Sustainable Manufacturing National Cheng Kung University Tainan City 70101 Taiwan Contribution: Supervision (lead)

Invited for this month's cover is the group of Nano Horizons Lab hosted by Prof. Yu-Ze Chen. The cover picture shows the lateral deposition of Zn guided by zincophilic Cu2Te flakes, resulting in the suppression of... 详细信息

关键词： δ-Cu2Te flakes aqueous zinc-ion batteries machine learning tellurization Zn dendrite

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Pioneering bone regeneration: A review of cutting-edge scaffolds in tissue engineering

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Bioprinting 2024年 43卷

作者： Alex, Y. Vincent, Sumi Divakaran, Nidhin Uthappa, U.T. Srinivasan, Parthasarathy Mubarak, Suhail Al-Harthi, Mamdouh Ahmed Dhamodharan, Duraisami School for Advanced Research in Petrochemicals: Laboratory for Advanced Research in Polymeric Materials (LARPM) Central Institute of Petrochemicals Engineering and Technology (CIPET) Bhubaneswar 751024 India Mechanical Engineering Program Physical Sciences and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Mechanics of Composites for Energy and Mobility Laboratory King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia College of Chemistry and Environmental Engineering Shenzhen University Shenzhen 518055 China Department of Electronics and Communication Engineering Amrita School of Engineering Amrita Vishwa Vidyapeetham Tamil Nadu Chennai 601103 India Research Institute of Humanities and Social Sciences University of Sharjah Sharjah 27272 United Arab Emirates Interdisciplinary Research Center for Refining and Advanced Chemicals King Fahd University of Petroleum and Minerals Dhahran 31261 Saudi Arabia Department of Chemical Engineering King Fahd University of Petroleum & Minerals Dhahran Saudi Arabia

Bone tissue engineering (BTE) is aims to develop advanced strategies to regenerate damaged or diseased bone, through the integration of principles from cellular biology, biomaterials science, and engineering. The vital aspect of these studies includes the design and fabrication of scaffolds that support cell adhesion, proliferation, and differentiation, ultimately promoting the formation of new bone tissue. Recent developments in scaffold materials have focused on organic, inorganic, and composite biomaterials. Each of these showcasing unique and distinct advantages in terms of biocompatibility, biodegradability, and mechanical strength. Polymers, such as poly (lactic-co-glycolic acid) (PLGA), provide flexibility and degradation profiles, which are conducive to tissue integration. While ceramics, including hydroxyapatite (HA) and β-tricalcium phosphate (β-TCP), offer mechanical properties similar to native bone. The fusion of organic and inorganic components in composites has yielded scaffolds with enhanced functionality, such as improved osteo-conductivity and controlled degradation rates. Advanced fabrication techniques, particularly electrospinning and 3D printing, have revolutionized scaffold design by enabling precise control over pore size, porosity, and surface architecture, critical parameters for mimicking the extracellular matrix (ECM) of bone. These structural characteristics directly influence cellular behaviors such as migration, proliferation, and differentiation, which are crucial for successful bone regeneration. This review critically evaluates the recent advances in biomaterials for scaffold fabrication, with a focus on optimizing the interplay between material properties and scaffold architecture to improve therapeutic outcomes in bone regeneration. The findings underscore the importance of material selection and scaffold design in BTE and provide actionable insights for both researchers and clinicians in the development of next-generation scaffol

关键词： Biomaterials Bone scaffold design Ideal scaffold Polymer Scaffold Tissue engineering

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Biomass waste as an alternative source of carbon and silicon-based absorbents for CO2 capturing application

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Chemosphere 2023年 343卷

作者： Suresh, R. Gnanasekaran, Lalitha Rajendran, Saravanan Jalil, A.A. Soto-Moscoso, Matias Khoo, Kuan Shiong Ma, Zengling Halimatul Munawaroh, Heli Siti Show, Pau Loke Departamento de Ingeniería Mecánica Facultad de Ingeniería Universidad de Tarapacá Avda. General Velásquez 1775 Arica Chile University Centre for Research & Development Department of Mechanical Engineering Chandigarh University Punjab Mohali140413 India Department of Chemical Engineering Lebanese American University Byblos Lebanon Centre of Hydrogen Energy Institute of Future Energy Johor UTM Johor Bahru81310 Malaysia Faculty of Chemical and Energy Engineering Universiti Teknologi Malaysia Johor UTM Johor Bahru81310 Malaysia Universidad Autónoma de Chile Chile Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan Taiwan Centre for Herbal Pharmacology and Environmental Sustainability Chettinad Hospital and Research Institute Chettinad Academy of Research and Education Tamil Nadu Kelambakkam603103 India Zhejiang Provincial Key Laboratory for Subtropical Water Environment and Marine Biological Resources Protection Wenzhou University Wenzhou325035 China Study Program of Chemistry Faculty of Mathematics and Science Education Universitas Pendidikan Indonesia Jalan Dr. Setiabudhi 229 Bandung40154 Indonesia Department of Chemical Engineering Khalifa University P.O. Box 127788 Abu Dhabi United Arab Emirates Department of Chemical and Environmental Engineering Faculty of Science and Engineering University of Nottingham Malaysia Jalan Broga Selangor Darul Ehsan Semenyih Malaysia

The production of low-cost solid adsorbents for carbon dioxide (CO2) capture has gained massive consideration. Biomass wastes are preferred as precursors for synthesis of CO2 solid adsorbents, due to their high CO2 adsorption efficiency, and ease of scalable low-cost production. This review particularly focuses on waste biomass-derived adsorbents with their CO2 adsorption performances. Specifically, studies related to carbon (biochar and activated carbon) and silicon (silicates and geopolymers)-based adsorbents were summarized. The impact of experimental parameters including nature of biomass, synthesis route, carbonization temperature and type of activation methods on the CO2 adsorption capacities of biomass-derived pure carbon and silicon-based adsorbents were evaluated. The development of various enhancement strategies on biomass-derived adsorbents for CO2 capture and their responsible factors that impact adsorbent's CO2 capture proficiency were also reviewed. The possible CO2 adsorption mechanisms on the adsorbent's surface were highlighted. The challenges and research gaps identified in this research area have also been emphasized, which will help as further research prospects. © 2023 Elsevier Ltd

关键词： Carbon dioxide

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Mechanistic data science for modeling and design of aerospace composite materials

arXiv

引用

arXiv 2021年

作者： Mojumder, Satyajit Tao, Lei Li, Ying Liu, Wing Kam Theoretical and Applied Mechanics Program Northwestern University EvanstonIL60208 United States Department of Mechanical Engineering University of Connecticut StorrsCT06269 United States Polymer Program Institute of Materials Science University of Connecticut StorrsCT06269 United States Department of Mechanical Engineering Northwestern University EvanstonIL60208 United States

Polymer matrix composites exhibit remarkable lightweight and high strength properties that make them attractive for aerospace applications. Constituents' materials such as advanced polymers and fibers or fillers with their hierarchical structure embed these exceptional properties to the composite materials. This hierarchical structure in multiple length scales provides an opportunity for designing the composite materials for optimized properties. However, the high dimensional design space for the constituents' materials and architectures choice of the composites makes it a challenging design problem. To tackle this high dimensional design space, a systematic, efficient approach named mechanistic data science framework is proposed in this work to identify the governing mechanisms of materials systems from the limited available data and create a composite knowledge database. Our composite knowledge database comprises the knowledge of polymers at the nanoscale with nano reinforcement, the unidirectional structure at the microscale, and woven structure at mesoscale mechanisms that can be further used for the part scale composite design and analysis. The mechanistic data science framework presented in this work can be further extended to other materials systems that will provide the materials designer with the necessary tools to evaluate a new materials system design rapidly. © 2021, CC BY-NC-ND.

关键词： Polymer matrix composites

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Plasmonically Enhanced Thermal Radiation by Means of Surface Phonon Polaritons

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Physical Review Applied 2020年第6期14卷 064013-064013页

作者： Sunmi Shin Renkun Chen Department of Mechanical Engineering National University of Singapore Singapore Materials Science and Engineering Program University of California San Diego California 92093 USA Department of Mechanical and Aerospace Engineering University of California San Diego La Jolla California 92093-0411 USA

Radiative heat transfer at the nanoscale has the potential to produce thermal emission with both spectral feature and intensity different from the bulk materials. Specifically, the idea of coupling the energy states of photons and phonons using surface phonon polaritons (SPhPs) blurs the boundary between light and heat, opening a path to the manipulation of heat transfer through photonic engineering and breaking the classical limit established by Planck’s law. SPhPs can generate a strong energy confinement effect near the surface; however, this effect is only valid within a narrow spectral regime, the so-called reststrahlen band. In this study, we employ a hybrid structure to broaden the effective energy regime for thermal emission by coupling SPhPs and surface plasmon polaritons (SPPs). We report remarkably enhanced thermal emission of a hybrid structure made of a SiO2 nanoribbon decorated with Au nanoparticles by a factor of 4 over that of a bare SiO2 nanoribbon. We introduce an experimental technique to quantify the emissivity from the complex nanostructured surface using frequency-dependent heat-transfer measurement. Not only does it enable us to detect feeble emission from a single nanoemitter, but it also differentiates two distinct heat-conducting processes of conduction and radiation, simultaneously. Our work may offer insights to engineer far-field thermal emission using hybrid structures combining the surface plasma and phonon polaritons.

关键词： Heat transfer Lattice thermal conductivity Phonon polariton Plasmonics Surface plasmon polariton Nanoribbon Oxides Infrared techniques

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Comparative study on mechanical characteristics of functionally graded and Coreshell nanospheres: An atomistic approach

arXiv

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arXiv 2021年

作者： Malakar, Prottay Anan, Md Al Rifat Islam, Mahmudul Thakur, Md Shajedul Hoque Mojumder, Satyajit Department of Mechanical Engineering Bangladesh University of Engineering and Technology Dhaka1000 Bangladesh Department of Materials Science and NanoEngineering Rice University HoustonTX77005 United States Theoretical and Applied Mechanics Program Northwestern University EvanstonIL60208 United States

Functionally Graded Material (FGM) is a type of advanced material consisting of two (or more) distinct substances with a constantly changing composition profile. FGM technologies have moved from their traditional use to advanced micro and nanoscale electronics and energy conversion systems along with the advent of nanotechnology. MD simulations are used in this analysis to examine the effect of compressive load on Ag-Au FGM and Coreshell nanospheres. The plasticity process is often started by the nucleation of partial dislocations from the contact surfaces, and these dislocations spread towards the nanosphere’s center. Also, we have found the formation of pyramidal-shaped partial dislocations on the pseudo-plastic regime. For a given wt% range of Ag in Au, Coreshell nanospheres have stronger mechanical strength than FGM nanospheres, and we have also observed two distinct patterns in ultimate stress variation for FGM and Coreshell nanospheres. The dislocation analysis suggests a correlation between this stress variation and the Shockley & Hirth partial dislocation density. © 2021, CC BY.

关键词： Nanospheres

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