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Aggregate 2022年第5期3卷 185-193页

作者： Hye Jin Cho Dong Yeun Jeong Hwihyun Moon Taewoo Kim You Kyoung Chung Yeongdong Lee Zonghoon Lee Joonsuk Huh Youngmin You Changsik Song Department of Chemistry Sungkyunkwan UniversitySuwonGyeonggi 16419Republic of Korea Division of Chemical Engineering and Materials Science Graduate Program in System Health Science and EngineeringEwha Womans UniversitySeoul 03760Republic of Korea Center for Multidimensional Carbon Materials Institute for Basic Science(IBS)Department of Materials Science and EngineeringUlsan National Institute of Science and Technology(UNIST)Ulsan 44919Republic of Korea

Understanding the precise molecular arrangement of chiral supramolecular polymers is essential not only to comprehend complex superstructures like proteins and DNA but also for the development of next-generation optoelectronic materials,including materials displaying high-performance circularly polarized luminescence(CPL).Herein,we report the first chiral supramolecular polymer systems based on hydrazone–pyridinium conjugates comprising alkyl chains of different lengths,which afforded control of the apparent supramolecular *** supramolecular chirality is governed basically by the remote chiral centers of alkyl chains,helicity inversion was achieved by controlling the conditions under which the hydrazone building blocks underwent aggregation(i.e.,solvent compositions or temperature).More importantly,the addition of water to the system led to aggregationinduced hydrazone deprotonation,which resulted in a completely different selfassembly *** water molecules played an essential role,forming the assembly’s channel-like backbone,around which hydrazone molecules gathered as a result of hydrogen bonding *** co-assembly of an achiral hydrazone luminophore with the given supramolecular polymer system allowed the fabrication of a novel CPL-active hydrazone-based material exhibiting a high maximum value for the photoluminescence dissymmetry factor of -2.6×10^(-2).

关键词： circularly polarized luminescence(CPL) helicity control hydrazone self-assembly structural water supramolecular polymerization

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Theoretical analysis of carbon deposition in the fuel electrode of a reversible solid-oxide cell

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Physical Review Applied 2025年第1期23卷 014005-014005页

作者： Gang Yang Yudong Wang Nengneng Xu Jeremy J. Leger Xiao-Dong Zhou Department of Chemical & Biomolecular Engineering University of Connecticut Storrs Connecticut 06269 USA Center for Clean Energy Engineering University of Connecticut Storrs Connecticut 06269 USA School of Mechanical Aerospace and Manufacturing Engineering University of Connecticut Storrs Connecticut 06269 USA Department of Chemical Engineering University of Louisiana at Lafayette Lafayette Louisiana 70503 USA Department of Material Science and Engineering University of Connecticut Storrs Connecticut 06269 USA

Carbon deposition in reversible solid-oxide cells (RSOCs) can block catalytic sites and may lead to delamination, resulting in performance degradation. In this study, we analyzed the thermodynamics at the fuel electrode of an RSOC during operation by modeling the oxygen chemical potential distribution across the RSOC to predict conditions for carbon deposition. It is found that carbon deposition is more likely to form under solid-oxide electrolysis (SOEC) mode than in solid-oxide fuel cell (SOFC) mode. We then investigated key parameters to suppress carbon deposition, including cell voltage, current density, electrolyte thickness, the electronic and ionic conductivity of electrolytes, and electronic and ionic area-specific resistances (ASRs) of the electrode-electrolyte interfaces. A thin electrolyte and a low ionic ASR of the fuel electrode-electrolyte interface suppress carbon deposition. A low electrolyte electronic conductivity σeEL, a high electrolyte ionic conductivity σiEL, and a low area-specific ionic resistance at the oxygen electrode-electrolyte interface riOE|EL result in a high Faradaic efficiency and enhanced electrolyzer performance, but they also accompany a high thermodynamic driving force for carbon deposition. In addition, maintaining a low cell voltage and a low CO composition in the fuel electrode helps suppress carbon deposition by avoiding and extremely reducing the atmosphere at the fuel electrode-electrolyte interface. A comparison between theoretical analysis and experimental observation is provided to validate our findings.

关键词： Carbon electrodes

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Asymmetric crowders and membrane morphology at the nexus of intracellular trafficking and oncology

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Mechanobiology in Medicine 2024年第3期2卷 51-57页

作者： Kshitiz Parihar Seung-Hyun BKo Ryan P.Bradley Phillip Taylor N.Ramakrishnan Tobias Baumgart Wei Guo Valerie M.Weaver Paul A.Janmey Ravi Radhakrishnan Department of Chemical and Biomolecular Engineering School of Engineering and Applied ScienceUniversity of PennsylvaniaPhiladelphiaPAUSA Department of Bioengineering School of Engineering and Applied ScienceUniversity of PennsylvaniaPhiladelphiaPAUSA Department of Chemistry School of Arts&SciencesUniversity of PennsylvaniaPhiladelphiaPAUSA Department of Biology School of Arts&SciencesUniversity of PennsylvaniaPhiladelphiaPAUSA Department of Surgery Center for Bioengineering and Tissue RegenerationUniversity of CaliforniaSan FranciscoSan FranciscoCAUSA Department of Physiology Perelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPAUSA

A definitive understanding of the interplay between protein binding/migration and membrane curvature evolution is emerging but needs further *** mechanisms defining such phenomena are critical to intracellular transport and trafficking of *** trafficking modalities,exosomes have drawn attention in cancer research as these nano-sized naturally occurring vehicles are implicated in intercellular communication in the tumor microenvironment,suppressing anti-tumor immunity and preparing the metastatic niche for progression.A significant question in the field is how the release and composition of tumor exosomes are *** this perspective article,we explore how physical factors such as geometry and tissue mechanics regulate cell cortical tension to influence exosome production by co-opting the biophysics as well as the signaling dynamics of intracellular trafficking pathways and how these exosomes contribute to the suppression of anti-tumor immunity and promote *** describe a multiscale modeling approach whose impact goes beyond the fundamental investigation of specific cellular processes toward actual clinical *** mechanisms are critical to developing and approving liquid biopsy technologies,poised to transform future non-invasive,longitudinal profiling of evolving tumors and resistance to cancer therapies to bring us one step closer to the promise of personalized medicine.

关键词： Multiscale modeling Curvature sensing Morphological transitions Trafficking Oncology

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Relationship between drought and soil erosion based on the normalized differential water index(NDWI)and revised universal soil loss equation(RUSLE)model

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Regional Sustainability 2024年第4期5卷 133-144页

作者： Muhammad RENDANA Wan Mohd Razi IDRIS Febrinasti ALIA Supli Effendi RAHIM Muhammad YAMIN Muhammad IZZUDIN Department of Chemical Engineering Faculty of EngineeringUniversitas SriwijayaIndralaya30662Indonesia Master Program of Environmental Management Graduate SchoolUniversitas SriwijayaPalembang30139Indonesia Department of Earth Sciences and Environment Faculty of Science and TechnologyUniversiti Kebangsaan MalaysiaBangi43600Malaysia Department of Civil Engineering Faculty of EngineeringUniversitas SriwijayaIndralaya30662Indonesia Master Program of Agricultural Sciences Graduate Study ProgramUniversitas Muhammadiyah PalembangPalembang30263Indonesia Department of Agribusiness Faculty of AgricultureUniversitas SriwijayaIndralaya30662Indonesia Department of Sociology Faculty of Social and Political SciencesUniversitas SriwijayaIndralaya30662Indonesia

The Langat River Basin in Malaysia is vulnerable to soil erosion risks because of its exposure to intensive land use activities and its topography,which primarily consists of steep slopes and mountainous ***,climate change frequently exposes this basin to drought,which negatively affects soil and water ***,recent studies have rarely shown how soil reacts to drought,such as soil ***,the purpose of this study is to evaluate the relationship between drought and soil erosion in the Langat River *** analyzed drought indices using Landsat 8 satellite images in November 2021,and created the normalized differential water index(NDWI)via Landsat 8 data to produce a drought *** used the revised universal soil loss equation(RUSLE)model to predict soil *** verified an association between the NDWI and soil erosion data using a correlation *** results revealed that the southern and northern regions of the study area experienced drought *** predicted an average annual soil erosion of approximately 58.11 t/(hm^(2)·a).Analysis of the association between the NDWI and soil erosion revealed a strong positive correlation,with a Pearson correlation coefficient of *** assumed that the slope length and steepness factor was the primary contributor to soil erosion in the study *** a result,these findings can help authorities plan effective measures to reduce the impacts of drought and soil erosion in the future.

关键词： Drought Soil erosion Normalized differential water index(NDWI) Revised universal soil loss equation(RUSLE) Langat River Basin

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Enhanced Lithium-Ion Battery Electrodes with Metal–Organic Framework Additives Featuring Undercoordinated Zr4+ Sites

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Advanced Materials 2025年第21期37卷 e2500909页

作者： Shen, Li Liu, Qian Huang, Xuecong Fortini, Alexis Li, Xianyang Tang, Mue Yin, Qingyang Yang, Jinhu Zhang, Chi Lu, Yunfeng School of Chemical Science and Engineering Institute for Advanced Studies Tongji University Shanghai200092 China Department of Chemical and Biomolecular Engineering University of California Los AngelesCA90095 United States School of Chemical Science and Engineering Tongji University Shanghai200092 China Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Beijing100029 China

Performances of lithium-ion batteries (LIBs) are dictated by processes of electron-ion separation, transfers, and combination. While carbon additives are routinely used to ensure electronic conductivity, additives capable of simultaneously boosting ion conduction and delivering step-change performance remain elusive. Herein, metal–organic frameworks (MOFs) possessing coordinately unsaturated Zr4+ sites are exploited as a new material library of electrode additives. The MOFs imbue infused electrolytes with an expanded electrochemical stability window (0 to 5 V vs Li/Li⁺) and enhanced Li⁺ transport efficiency. Mechanistically, strong interactions between Zr4+ sites and Li+ solvation sheaths result in trimmed, anion-fixed, and solvent-separated ion pairs, mitigating electrostatic coupling and enabling efficient Li⁺ translocation in the porous nanospace. Concomitantly, these solvation structural modulations foster interfacial and electrochemical stabilities. When implemented at 1.7 wt.% in graphite and sub-Ah full cell, the MOF additives significantly improved Li+ diffusional kinetic, rate capability beyond 2C, and cycling longevity doubling lifespan. This work offers a straightforward yet effective route to remedy the bottlenecks of industrial LIBs. © 2025 Wiley-VCH GmbH.

关键词： Solvation

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Exploring the Potential of Nitrogen-Doped Graphene-Coated Copper Foam in Co2 Reduction Reactions

SSRN

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SSRN 2023年

作者： Srimanon, Krisara Pikulrat, Daranphop Homlamai, Kan Duangdangchote, Salatan Sawangphruk, Montree Sasipatworakarn, Thanthita Department of Chemical and Biomolecular Engineering School of Energy Science and Engineering Vidyasirimedhi Institute of Science and Technology Rayong21210 Thailand

This study examines the effectiveness of 3D nitrogen-doped graphene-coated copper foam (N-Gr/CuF), synthesized via a chemical vapor deposition (CVD), in catalyzing carbon dioxide reduction reaction (CO2RR). Our findings indicate that N-Gr/CuF shows a promising selectivity towards formate production, achieving a Faradaic efficiency of 66.5% at an overpotential of -1.0 V vs RHE. Through in situ electrochemical gas chromatography (GC) and density functional theory analysis, we observed that N-Gr/CuF appears to reduce the undesirable hydrogen evolution reaction (HER) by more than two-fold. This effect is potentially due to the presence of electron-rich nitrogen dopants, which can stabilize HCOOH* intermediates. Additionally, the Gibbs free energies for HCOOH* and CO* adsorption on N-Gr/CuF are -1.85 and -1.97 eV, respectively. This suggests that HCOOH required less energy for conversion into gas molecules. These initial results indicate that N-Gr@CuF could be a viable candidate for selective and efficient CO2 reduction to formate, while also offering insights into the suppression of HER. This study contributes to the growing body of research in CO2 reduction and may inform future technological developments in the field. © 2023, The Authors. All rights reserved.

关键词： Carbon dioxide

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A quantitative image analysis platform for assessing trophoblast differentiation

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Placenta 2025年 166卷 117-125页

作者： Jabeen, Mahe Karakis, Victoria Britt, John Miguel, Adriana San Rao, Balaji Department of Chemical and Biomolecular Engineering North Carolina State University Raleigh 27695 NC United States Golden LEAF Biomanufacturing Training and Education Center North Carolina State University Raleigh 27695 NC United States Genetics Program North Carolina State University Raleigh 27695 NC United States

Immunofluorescence microscopy is extensively used in characterization of trophoblast differentiation in vitro. However, such data is primarily used to confirm the presence of protein markers or qualitatively compare levels of protein markers across experimental conditions. Imaging data, when processed and analyzed appropriately can provide quantitative and spatial information, and provide biological insight. Towards this end, here we present MATroph, an open-source MATLAB-based computational tool to process images generated by immunofluorescent microscopy. MATroph automatically executes a series of image processing operations, including the classification of red, blue, and green channels from images, background extraction, morphological operations, and image filtering. From the isolated blue channels corresponding to nuclear staining, this tool generates numerical values for cell number. Additionally, relative levels and spatial location of proteins are obtained by mapping red and green channel pixels to blue pixels by assigning minimum pixel distance between the blue and other color objects. Thus, this tool provides information about intracellular protein accumulation areas. Additionally, this tool can also classify cells as single cells or part of colonies, and extract information on protein levels for each;this is particularly useful for quantitative studies on extravillous trophoblast maturation. We provide a user-guide to analyze the relative levels of markers relevant to human trophoblast stem cell self-renewal and differentiation. Importantly, MATroph is composed of a simple MATLAB algorithm, and its implementation requires minimal expertise in programming. © 2024 Elsevier Ltd

关键词： Confocal microscopy Extravillous trophoblast Human trophoblast stem cell Image analysis Immunofluorescence Quantitative analysis Syncytiotrophoblast Trophoblast differentiation

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Reusable Hydrogen Storage Tank with Flange Design 10

Reusable Hydrogen Storage Tank with Flange Design

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10th International Conference on Applied System Innovation, ICASI 2024

作者： Li, Yun-Qi Chen, Hsuan-Jung Yang, Hsi-Wen Chen, Chih-Yuan Chang, Shao-Fu Chen, Ssu-Ying Chen, Chien-Chon College of Engineering and Science Ph.D. Program in Materials and Chemical Engineering National United University Miaoli Taiwan Michigan State University Department of Chemistry MI48824 United States National United University Department of Materials Engineering Miaoli Taiwan Graduate Institute of Intellectual Property National Taipei University of Technology Taiwan National United University Department of Energy Engineering Miaoli Taiwan

ISBN: (纸本)9798350394924

For how to store and transport hydrogen, the first thought is to store hydrogen directly in the cylinder. However, this method is not desirable, because generally at least 700 atm high pressure, the hydrogen contained in the cylinder to be useful. Therefore it is very unsafe at such high pressures. In This paper, we design and production of a new generation of solid-state hydrogen storage and discharge container. The goal of 'development of solid-state hydrogen storage technology' is to break through the bottlenecks of hydrogen storage technology safety, hydrogen storage density, high-efficiency hydrogen absorption and release, transportation safety, and engineering practice. © 2024 IEEE.

关键词： Aluminum

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End-to-End Reaction Field Energy Modeling via Deep Learning based Voxel-to-voxel Transform

arXiv

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arXiv 2024年

作者： Wu, Yongxian Zhu, Qiang Luo, Ray Department of Chemical and Biomolecular Engineering Molecular Biology and Biochemistry Materials Science and Engineering and Biomedical Engineering University of California Irvine IrvineCA92697 United States

In computational biochemistry and biophysics, understanding the role of electrostatic interactions is crucial for elucidating the structure, dynamics, and function of biomolecules. The Poisson-Boltzmann (PB) equation is a foundational tool for modeling these interactions by describing the electrostatic potential in and around charged molecules. However, solving the PB equation presents significant computational challenges due to the complexity of biomolecular surfaces and the need to account for mobile ions. While traditional numerical methods for solving the PB equation are accurate, they are computationally expensive and scale poorly with increasing system size. To address these challenges, we introduce PBNeF, a novel machine learning approach inspired by recent advancements in neural network-based partial differential equation solvers. Our method formulates the input and boundary electrostatic conditions of the PB equation into a learnable voxel representation, enabling the use of a neural field transformer to predict the PB solution and, subsequently, the reaction field potential energy. Extensive experiments demonstrate that PBNeF achieves over a 100-fold speedup compared to traditional PB solvers, while maintaining accuracy comparable to the Generalized Born (GB) model. Copyright © 2024, The Authors. All rights reserved.

关键词： Boltzmann equation

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Role of 3d Cvd N-Doped Graphene Coated on Cu Foam Towards Selective Electrochemical Reduction of Carbon Dioxide to Formate: In Situ Electrochemical Gas Chromatography

SSRN

引用

SSRN 2023年

作者： Sasipatworakarn, Thanthita Pikulrat, Daranphop Homlamai, Kan Duangdangchote, Salatan Sawangphruk, Montree Department of Chemical and Biomolecular Engineering School of Energy Science and Engineering Vidyasirimedhi Institute of Science and Technology Rayong21210 Thailand

This study investigates the potential of 3D nitrogen-doped graphene-coated copper foam (N-Gr/Cu), synthesized via chemical vapor deposition (CVD), as an efficient and scalable electrocatalyst for carbon dioxide reduction reactions (CO2RR). The N-Gr/Cu foam demonstrates notable selectivity for formate production, achieving a Faradaic efficiency of 66.5% at an overpotential of -1.0 V vs RHE. Our research based on an in situ electrochemical gas chromatography (GC) and density functional theory reveals that this catalyst significantly suppresses the undesirable hydrogen evolution reaction (HER) by more than two-fold, due to the presence of electron-rich nitrogen dopants that stabilize HCOOH* intermediates. Additionally, N-Gr/Cu exhibits comparable Gibbs free energies for HCOOH* and CO*, approximately -1.85 and -1.97 eV, respectively. Despite this similarity, our energy release analysis demonstrates that HCOOH requires less energy for conversion into gas molecules. These findings underscore the substantial potential of N-Gr@Cu as a selective and efficient electrocatalyst for CO2 reduction to formate by suppressing the HER, providing valuable insights for future research and technological advancements in this field. © 2023, The Authors. All rights reserved.

关键词： Carbon dioxide

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