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SSRN 2024年

作者： Othman, Norinsan Kamil Mohammed, Naba Jasim Yusop, Muhammed Rahimi Al-Gburi, Ahmed Jamal Abdullah Materials Science Program Department of Applied Physics Faculty of Science and Technology University Kebangsaan Malaysia Selangor Bangi43600 Malaysia Faculty of Science and Technology School of Chemical Sciences and Food Technology University Kepangsaan Malaysia Selangor Bangi43600 Malaysia Faculty of Electronics and Computer Engineering Universiti Teknikal Malaysia Melaka Hang Tuah Jaya Melaka Durian Tunggal76100 Malaysia

In this investigation, we explored the corrosive effects of date palm seed extracted from natural sources and biomass residues on mild steel in a solution of 0.5 M hydrochloric acid (HCl), employing a combination of experimental and theoretical approaches. Our objective was to scrutinize the interaction of the inhibitor with the metal surface, analyze experimental data, and elucidate how the structural characteristics of the inhibitors influence the corrosion process. The experimental results indicated that as the immersion time and temperature increased, the inhibitory effectiveness declined. Notably, the highest level of inhibition occurred when the concentration of date palm seed extract (DPSE) reached 1100 ppm, showcasing peak inhibitory effects of 95.8% and 97.8% through potentiodynamic polarization and electrochemical impedance spectroscopy techniques, respectively. Additionally, an analysis using X-ray diffraction (XRD) was conducted to scrutinize the chemical composition of the mild steel's surface. The adsorption data were evaluated using adsorption isotherms, revealing that DPSE adhered to the Langmuir adsorption isotherm on the mild steel surface. The Langmuir model exhibited the highest linear regression coefficient value and a slope close to unity. The Gibbs free energy () values suggested that the protection afforded by DPSE involved physical and spontaneous absorption. Examination of the results pertaining to the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) indicated that the carboxyl (COOH) group and the C=C bond were the principal regions exhibiting elevated electron acceptance activity. These components were found to be crucial in the adsorption process on the surface of iron (Fe). © 2024, The Authors. All rights reserved.

关键词： Electrochemical impedance spectroscopy

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Prelithiation of silicon encapsulated in MOF-derived carbon/ZnO framework for high-performance lithium-ion battery

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Nano materials science 2024年

作者： Liu, Congcong Yang, Yang Yao, Yu Dai, Tao Xu, Shitan Yang, Shoumeng Ali, Ghulam Rui, Xianhong Yu, Yan Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter School of Materials and Energy Guangdong University of Technology Guangzhou510006 China Hefei National Research Center for Physical Sciences at the Microscale Department of Materials Science and Engineering CAS Key Laboratory of Materials for Energy Conversion University of Science and Technology of China Anhui Hefei230026 China New Material Co. Ltd China U.S.-Pakistan Center for Advanced Studies in Energy National University of Sciences and Technology Islamabad Pakistan

Silicon possesses a high theoretical capacity, making it a potential contender for lithium-ion battery (LIB) anodes. Nonetheless, its practical usage is challenged by low electrical conductivity and significant volume expansion during cycling. Here, we synthesized a novel silicon/carbon (Si/C) anode doped with ZnO via a template-derived method and high-temperature carbonization. The carbon structure, originated from metal-organic frameworks (MOFs) and ZnO doping, substantially enhanced the electrochemical properties of the composite material. It exhibited an initial capacity of 2 100.3 mA h g−1 at a current density of 0.2 A g−1 and demonstrated excellent capacity retention over successive cycles. Moreover, the composite material displayed superior rate performance at higher current densities of 2 A g−1 and 3 A g−1. To address the low initial Coulombic efficiency (ICE) of silicon-based materials, we adopted a direct contact prelithiation approach and optimized the lithiation process by controlling the prelithiation time. After 30 min of prelithiation, the ICE reached 97.9 %, thereby reducing the initial irreversible capacity loss (ICL) and realizing stable discharge-charge in subsequent cycles. This rational design provides valuable insights for achieving high-performance silicon anode. © 2024 Chongqing University

关键词： II-VI semiconductors

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Large-Scale Distributed Multidisciplinary Design Optimization of the NASA Lift-Plus-Cruise Air Taxi Concept

Large-Scale Distributed Multidisciplinary Design Optimizatio...

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AIAA science and Technology Forum and Exposition, AIAA SciTech Forum 2025

作者： van Schie, Sebastiaan P. C. Ruh, Marius L. Fletcher, Andrew Warner, Michael Sperry, Mark Scotzniovsky, Luca Orndorff, Nicholas C. Xiang, Ru Yan, Jiayao Zhao, Han Krokowski, Joshua J. Chen, J.S. Sarojini, Darshan Gill, Hyunjune Lee, Seongkyu Tagg, Andrew Anderson, Ryan Green, Eric Joseph, Cibin Ning, Andrew Cheng, Zeyu Cao, Zhi Mi, Chunting Guibert, Alexandre T. R. Cronk, Ashley Kim, H. Alicia Meng, Y. Shirley Silva, Christopher Hwang, John T. University of California San Diego 9500 Gilman Dr La Jolla CA92093 United States Department of Mechanical and Aerospace Engineering University of California San Diego 9500 Gilman Dr La Jolla CA92093 United States Department of Structural Engineering University of California San Diego 9500 Gilman Dr La Jolla CA92093 United States Aerospace and Ocean Engineering Department Virginia Tech 1600 Innovation Dr BlacksburgVA24060 United States Department of Mechanical and Aerospace Engineering University of California Davis 1 Shields Avenue DavisCA95616 United States Mechanical Engineering Brigham Young University ProvoUT84602 United States Department of Electrical & Computer Engineering San Diego State University 5500 Campanile Dr San Diego92182 United States Structural Engineering Department University of California San Diego 9500 Gilman Dr La Jolla CA92093 United States Materials Science & Engineering Program University of California San Diego 9500 Gilman Dr La Jolla CA92093 United States Pritzker School of Molecular Engineering The University of Chicago ChicagoIL60607 United States NASA Ames Research Center Moffett FieldCA94035 United States

ISBN: (数字)9781624107238

ISBN: (纸本)9781624107238

Large-scale gradient-based Multidisciplinary Design Optimization (MDO) can aid in the exploration of high-dimensional design spaces for novel air vehicle concepts, thereby leading to more efficient and economic designs. This paper builds on past works where we demonstrated large-scale physics-based MDO capabilities and applied these to NASA’s lift-plus-cruise electric air taxi concept. We extend this comprehensive mid-fidelity system-level optimization problem with high(er)-fidelity subsystem-level optimizations of various aircraft systems and mission phases, with the aim of further enhancing the accuracy and scope of the aforementioned system-level optimization problem: 1) Power minimization during the transition mission phase;2) Electrical powertrain topology optimization;3) Cell chemistry modeling and thermomechanical battery pack topology optimization;4) Shell-based coupled aero-elastic wing structure optimization. An Analytical Target Cascading-like distributed MDO architecture allows us to couple the system- and subsystem-level optimizations in order to arrive at a consistent and feasible design. We find that the system-level design is most heavily impacted by the reduced battery pack-level energy densities that stem from power peaks in the mission profile. These power peaks seem to result from the inefficient lift rotor blade designs that are needed to satisfy noise constraints. We draw conclusions based on trends in our results and give recommendations for future MDO studies of electrical air taxi vehicle concepts. © 2025, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Shape optimization

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Theoretical and Experimental studies on Characterisation and Collection of Particulate Matter in Single-Wire, Single-Stage Electrostatic Precipitator with Square Cross-Section

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SSRN 2024年

作者： Kumar, Aiswarya A. Nawale, Prashant Rohidas Mayya, Y.S. Sahu, Manoranjan Aerosol and Nanoparticle Technology Laboratory Environmental Science and Engineering Department Indian Institute of Technology Bombay Mumbai400076 India Interdisciplinary Program in Climate Studies Indian Institute of Technology Bombay Mumbai400076 India Centre for Machine Intelligence and Data Science Indian Institute of Technology Bombay Mumbai400076 India Chemical Engineering Department Indian Institute of Technology Bombay Mumbai400076 India

Electrostatic precipitation (ESP) is a technology widely used to remove particulate matter (PM) from industrial gas streams. To adopt the same for varying scales as well as for different clean air delivery applications, there exists a requirement for the development of comprehensive, readily adaptable, reasonably good, comparable, rigorous, step-by-step analytical theory and experimental validation of same for design of modular units of ESP. In this regard, current study conducted theoretical and experimental studies to investigate corona characterisation and PM collection efficiency in a modular unit of a single-wire, single-stage, wire-plate ESP with square cross-sectional geometry. The theory integrated the corona discharge with particle transport while the experimental study was conducted using a laboratory scale ESP. Best agreement between I-V characteristics of theory and experiment was obtained while adjusting inception electric field to 12.35´105 Vm-1 as well as the ion diffusion coefficient value to 0.0647´10-4 m2s-1. Relative error for local minimum efficiency between theory as well as experiment for three tested flow rates 30 LPM, 50 LPM and 100 LPM were 5.37%, 1.36%, 14.58% and was 1.36%, 7.52% and 6.23% for three potentials 9 kV, 11 kV as we all as 13 kV respectively. As accuracy and reliability of present model are verified in terms of collecting efficiency at different operating conditions, present model can facilitate the design and scale-up of ESPs for indoor PM control with high collection efficiency. The study also illustrated a sample calculation on the applicability of this filter-less technology for air cleaning in an indoor environment. © 2024, The Authors. All rights reserved.

关键词： Electrostatic precipitators

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Breaking boundaries in optical manipulation:beyond Nobel-Prize-winning tweezers

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Photonics Insights 2023年第2期2卷 1-2页

作者： Pavana Siddhartha Kollipara Yuebing Zheng Walker Department of Mechanical Engineering The University of Texas at AustinAustinUSA Materials Science and Engineering Program and Texas Materials Institute The University of Texas at AustinAustinUSA

Richard Feynman’s famous 1959 lecture“There is plenty of room at the bottom”inspired scientists and engineers to focus on manipulating matter at the nanoscale[1].Optical tweezers,groundbreaking tools that use light to trap and move small particles with nanoscale precision,have revolutionized many fields such as materials science,biology,physics,and nanotechnology[2,3].For example,optical tweezers have enabled researchers to investigate the mechanical properties of biological molecules,study the behavior of colloidal suspensions,explore the movement of motor proteins,and investigate the directed assembly of nanoscale structures[4–6].

关键词： plenty breaking optical

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A Rapid Manual Solid Phase Peptide Synthesis Method for High-Throughput Peptide Production

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Journal of Biomedical materials Research - Part A 2025年第5期113卷 e37922页

作者： Overby, Clyde Abraham, Brittany Adjei-Sowah, Emmanuella March, Alyson Ling, Kevin Basu, Sayantani Benoit, Danielle S. W. Department of Biomedical Engineering University of Rochester RochesterNY United States Center for Musculoskeletal Research University of Rochester RochesterNY United States Department of Chemical Engineering University of Rochester RochesterNY United States Materials Science Program University of Rochester RochesterNY United States Department of Bioengineering Knight Campus for Accelerating Scientific Impact University of Oregon EugeneOR United States

Solid phase peptide synthesis (SPPS) techniques are critical for developing and using peptides in various biomedical applications. However, typical synthesis routes used in SPPS are either resource-intensive (e.g., with automated synthesis or commercial services) or time-consuming (e.g., with manual benchtop synthesis). Here, a rapid manual synthesis method was developed to produce up to 8 peptides with fast cycle times simultaneously. Peptides synthesized manually were of equivalent or superior quality to those produced by in-house microwave-assisted automated peptide synthesis, with higher average crude purity of 70% compared to 50%. The method significantly reduced synthesis time, enabling the parallel coupling of up to 8 amino acids simultaneously in 15–20 min, as opposed to traditional benchtop peptide synthesis, which requires 80–150 min per amino acid. This approach offers an intermediate throughput between milligram-scale libraries and gram-scale single peptide synthesis, enabling rapid iteration for novel peptide designs without the need for expensive automated systems. As a result, peptide modifications, including incorporation of unnatural amino acids, can be explored, accelerating the development of peptides for a wide range of applications. © 2025 The Author(s). Journal of Biomedical materials Research Part A published by Wiley Periodicals LLC.

关键词： Medical applications

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Energy harvesting in cellular radio access networks based on Q-learning

Energy harvesting in cellular radio access networks based on...

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27th International Conference on Advanced Computing and Communications (ADCOM 2022)

作者： S. Sharma N. Dewangan S. Mandal K. Thakur A. Sharma Department of Electrical and Computer Engineering Ajou University Suwon-16499 Republic of Korea School of Studies in Electronics and Photonics Pt. Ravishankar Shukla University Raipur-492010 India Department of Materials Science and Engineering Ajou University Suwon 16499 Republic of Korea

In the modern communication world, capacity of future mobile networks will continuously rise for enhanced data traffic and high reliability. The current evolution trends in 5G networks and beyond impose drastic increase in energy consumption and therefore, a high level of carbon footprint by industry network infrastructures. Modern 5G wireless communication can be a potential driver for machine learning (ML) and artificial intelligence architecture at network edge. Herein, we investigate the performance and evaluation analysis of cellular radio access networks (RAN) simulated and based Q-learning approach by turning on-off some base stations (BSs) to achieve enhanced energy savings in a cellular RAN. In this work, we study the BS switching actions, considering traffic load variations. We formulate the network models as action state, environment and reward. It was shown that the proposed learning scheme results in efficient energy saving under varying workloads.

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Maximizing the ion accessibility and high mechanical strength in nanoscale ion channel MXene electrodes for high-capacity zinc-ion energy storage

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science Bulletin 2022年第21期67卷 2216-2224页

作者： Yongfa Cheng Yimei Xie Shuwen Yan Zunyu Liu Yanan Ma Yang Yue Jianbo Wang Yihua Gao Luying Li Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Information Materials and Intelligent Sensing Laboratory of Anhui Province Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of EducationInstitutes of Physical Science and Information TechnologyAnhui UniversityHefei 230601China International School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China School of Physics and Technology Center for Electron MicroscopyKey Laboratory of Artificial Micro-and Nano-Structures of Ministry of Education and the Institute for Advanced StudiesWuhan UniversityWuhan 430072China

Two-dimensional transition-metal carbides(MXenes)have superhydrophilic surfaces and superior metal conductivity,making them competitive in the field of electrochemical energy ***,MXenes with layered structures are easily stackable,which reduces the ion accessibility and transport paths,thus limiting their electrochemical *** fully exploit the advantages of MXenes in electrochemical energy storage,this study reports the etching of large-sized MXene into nanosheets with nanoscale ion channels via a chemical oxidation *** the resulting ion-channel MXene electrodes retain the excellent mechanical strength and electrical conductivity of large-sized MXene nanosheets,they can effectively shorten the ion transport distance and improve the overall electrochemical *** fabricated self-healing MXene-based zinc-ion microcapacitor exhibits a high areal specific capacitance(532.8 mF cm^(-2))at the current density of 2mA cm^(-2),a low self-discharge rate(4.4 mV h^(-1)),and high energy density of 145.1μWh cm^(-2)at the power density of 2800μW cm^(-2).The proposed nanoscale ion channel structure provides an alternative strategy for constructing high-performance electrochemical energy storage electrodes,and has great application prospects in the fields of electrochemical energy storage and flexible electronics.

关键词： MXene Ion channel Ion accessibility High strength Zinc-ion microcapacitor

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Performance Evaluation of Sulfidated Nanoscale Iron for Hexavalent Chromium Removal from Groundwater in Sequential Batch Study

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SSRN 2023年

作者： Bhattacharya, Mainak Barbhuiya, Najmul Haque Singh, Swatantra Pratap Environmental Science and Engineering Department Indian Institute of Technology Bombay Mumbai India Interdisciplinary Program in Climate Studies Indian Institute of Technology Bombay Mumbai400076 India Centre for Research in Nanotechnology & Science Indian Institute of Technology Bombay Mumbai400076 India

Chromium [Cr] contamination in groundwater is one of the serious environmental concerns due to the carcinogenicity of its water-soluble and mobile hexavalent [Cr(VI)] form. In spite of the existence of multiple precipitation and adsorption-based Cr(VI) remediation technologies, the usage of sulfidated nano zerovalent iron (S-nZVI) has recently attracted researchers due to its high selectivity. Although S-nZVI effectively immobilized Cr(VI), its long-term performance in multiple shifted equilibrium has not been explored. In this contribution, a comparative study between conventional nano zerovalent iron (nZVI) and S-nZVI was conducted to investigate their respective efficiencies during repeated usage. First, influences of S-nZVI dosage, initial concentration of Cr(VI), pH, ionic strength, total hardness, sulfate, carbonate, and silicate were probed in ultrapure water. Further experiments were performed in synthetic groundwater to investigate the effects of the initial concentration of Cr(VI) in the pH range of 4 – 8 for 1 g L-1 S-nZVI dosage. The removal rate of Cr(VI) was quantified in groundwater without pH fixation. Finally, a set of sequential batch studies was performed to compare the performance of nZVI and S-nZVI due to repeated usage in Cr(VI)-spiked ultrapure water and groundwater matrices. Mechanistic interpretation of the processes governing the immobilization of Cr(VI) was done by integrating the results of these experiments with the metadata. While aggregation due to magnetic properties and rapid oxidation of Fe decreased the efficiency of nZVI with repeated usage, sulfidation minimized the passivation and favored an extended reducing environment because of continuous electron transfer from iron and sulfur components. © 2023, The Authors. All rights reserved.

关键词： Groundwater

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Evolution of magnetism in the magnetic topological semimetal NdSbxTe2−x+δ

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Physical Review B 2024年第18期109卷 184429-184429页

作者： Santosh Karki Chhetri Rabindra Basnet Jian Wang Krishna Pandey Gokul Acharya Md Rafique Un Nabi Dinesh Upreti Josh Sakon Mansour Mortazavi Jin Hu Department of Physics University of Arkansas Fayetteville Arkansas 72701 USA Department of Chemistry and Physics University of Arkansas at Pine Bluff Pine Bluff Arkansas 71603 USA Department of Chemistry and Biochemistry Wichita State University Wichita Kansas 67260 USA Materials Science and Engineering Program Institute for Nanoscience and Engineering University of Arkansas Fayetteville Arkansas 72701 USA Department of Chemistry and Biochemistry University of Arkansas Fayetteville Arkansas 72701 USA

Magnetic topological semimetals LnSbTe (Ln=lanthanide) have attracted intensive attention because of the presence of interplay between magnetism, topological, and electron correlations depending on the choices of magnetic Ln elements. Recently, varying Sb-Te composition has been found to effectively control the electronic and magnetic states in LnSbxTe2−x. With this motivation, we report the evolution of magnetic properties with Sb-Te substitution in NdSbxTe2−x+δ, (0≤x≤1). Our work reveals the interesting nonmonotonic change in magnetic ordering temperature with varying composition stoichiometry. In addition, reducing the Sb content x drives the reorientation of moments from in-plane (ab-plane) to out-of-plane (c-axis) direction that results in the distinct magnetic structures for two end compounds NdTe2 (x=0) and NdSbTe (x=1). Furthermore, the moment orientation in NdSbxTe2−x+δ is also found to be strongly tunable upon application of a weak magnetic field, leading to rich magnetic phases depending on the composition stoichiometry, temperature, and magnetic field. Such strong tuning of magnetism in this material establishes it as a promising platform for investigating tunable topological states and correlated topological physics.

关键词： Charge density waves Magnetic phase transitions Spin reorientation transition

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