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SSRN 2025年

作者： Li, Dezhen Yin, Jianhang Yu, Zeping Gao, Ziqian Meng, Lei Xu, Na College of Materials Science and Engineering Jilin Institute of Chemical Technology Jilin132022 China College of Information Control Engineering Jilin Institute of Chemical Technology Jilin132022 China College of Mechanical and Electrical Engineering Jilin Institute of Chemical Technology Jilin132022 China

Rapid detection methods face challenges in identifying various pesticide residues together, and sensor arrays are limited by high costs and complexity of receptor preparation. Inspired by self-assembled nanoenzymes, we developed three types of laccase nanoenzymes from L-leucine, L-isoleucine, and L-phenylalanine with copper ions. These form thin-film (Cu-Leu, Cu-Ile) and rod-shaped (Cu-Phe) structures, modulating laccase activity for a three-channel sensor array. The distinct interactions between the amino acids and copper ions allowed us to modulate the laccase activity, leading to the construction of a three-channel colorimetric sensor array. This array provides differential responses to pesticides, analyzed by LDA and HCA, achieving an LOD of less than 0.0012 μM, which is more sensitive than most previously reported studies. Most notably, the arrays demonstrated robust resistance to interference and a high feasibility for identifying pesticides in fruits and vegetables, with accurate identification of blind samples. © 2025, The Authors. All rights reserved.

关键词： Colorimetry

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Random Walker based Automated Phase Discrimination and Morphological Insights in Ultra-High Carbon Steel

Random Walker based Automated Phase Discrimination and Morph...

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Data Analytics for Business and Industry: Way Towards a Sustainable Economy (ICDABI), International Conference on

作者： Varnit Jain Vidyapati Kumar Ankita Mistri Mohit Jain Amitava Choudhury Manojit Ghosh Department of Metallurgy and Materials Engineering Indian Institute of Engineering Science and Technology (IIEST) SHIBPUR West Bengal India Department of Mechanical Engineering Indian Institute of Technology Kharagpur West Bengal India Department of Mechanical Engineering Indian Institute of Technology Dhanbad Jharkhand India Department of Computer Science and Engineering Pandit Deendayal Energy University Gandhinagar India

ISBN: (数字)9798350369786

ISBN: (纸本)9798350369793

Image analysis is an important process required for characterization in different engineering domains. This work presents a novel image processing methodology to segment phases and quantify grain morphology in ultra-high carbon steel (UHCS) micrographs. Unlike conventional global thresholding methods, an interactive random walker technique which leverages user-defined markers for localized phase discrimination was deployed. Adaptive histogram equalization enhances contrast to identify seed markers representing distinct phases. The random walker algorithm propagates labels from these seeds by minimizing an edge-weighted cost function. This interactive approach provides precise phase boundaries despite variability in grain morphology. The segmented output enables statistical grain size, shape, and orientation quantification. The study demonstrates the UHCS micrograph data for an input grayscale image, and the mean area, mean intensity, and mean orientation of all the grains are computed to be 716.667 px 2 , 129.449, and -53.648, respectively. By combining accessible preprocessing, interactive localization, and rigorous postprocessing, our pipeline automates the characterization of microstructural features from image customizable nature of this physics-based machine learning technique makes it widely applicable for robust characterization of varied material microstructures from images.

关键词： Image segmentation Histograms Image analysis Shape Morphology Machine learning Microstructure

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Effect of Annealing Temperature and MoO3 Composition on the mechanical Properties of PEDOT:PSS-MoO3 Blend Thin Film Layers for Organic Solar Cells and Organic Light Emitting Diodes Applications

Effect of Annealing Temperature and MoO3 Composition on the ...

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Multidisciplinary engineering and Applied science (ICMEAS), International Conference on

作者： Kum Tatchen Buh Daniel Iramofu Amune Vitalis Chioh Anye Odette Fayen Ngasoh Abdulhakeem Bello Sadiq Thomas Department of Materials Science and Engineering African University of Science and Technology (AUST) Abuja Nigeria Department of Materials Science and Engineering Department of Electical-Electronics Engineering Faculty of Engineering African University of Science and Technology (AUST) Nile University of Nigeria Abuja Nigeria Department of Mechanical Engineering African University of Science and Technology (AUST) Abuja Nigeria Department of Theoritical & Applied Physics African University of Science and Technology (AUST) Abuja Nigeria Department of Computer Engineering Faculty of Engineering Nile University of Nigeria Abuja Abuja Nigeria

ISBN: (数字)9798350358834

ISBN: (纸本)9798350358841

Experimental and computational methods are employed in this study to examine how varying heat treatment temperatures and composition of Moo3nanoparticles, a transition metal oxide (TMO) impact the mechanical properties of PEDOT:PSS/MoO3 thin film blends for organic photovoltaics (OPVs) and organic light emitting diode (OLED) applications. The study primarily investigates the mechanical properties (hardness and Young's modulus), microstructure and surface morphology of solution-processed PEDOT:PSS/MoO3 ink blends of different compositions prepared at temperature regimes between 60 to 120 °C. Nanoindentation is used to investigate mechanical properties and Scanning Probe Microscopy to examine the surface morphological and microstructural changes. mechanical maps and statistical deconvolutions are used to show the distribution of mechanical properties and phases respectively in the PEDOT:PSS/Mo03 thin film blends at the different annealing temperatures (60 - 120 °C). The experimental and computational results lead to the conclusion that incorporating different percentages of Moo3into PEDOT:PSS can, depending on the blended ratio improve the microstructure, mechanical properties and surface morphology of the PEDOT:PSS/MoO3 blends. Lightly doped PEDOT:PSS/MoO3 blends (1:0.1, 1:0.3), generally exhibit improved surface morphologies, enhanced elastic modulus and hardness, suitable for applications in efficient and mechanically durable electronic devices.

关键词： Temperature Annealing Surface morphology Morphology Organic light emitting diodes mechanical factors Microstructure

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Tandem Solar Cell Approach: Unveiling the Potential of Rudorffite/Silicon Combinations for Providing the Best Solar Cell Performance

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Physica Status Solidi (A) Applications and materials science 2025年第0期

作者： Islam, Md. Arif Ul Das, Ovijit Khadka, Dev Bahadur Kato, Shinya Soga, Tetsuo Department of Physics University of Barishal Barishal8200 Bangladesh Department of Electrical and Mechanical Engineering Nagoya Institute of Technology Gokiso-cho Showa-Ku Nagoya466-8555 Japan Department of Materials Science and Engineering University of Connecticut ConnecticutCT06269 United States

The first-ever investigation on rudorffite/silicon-based two-terminal (2T) tandem solar cells is presented in this innovative study, which investigates their potential to achieve unprecedented levels of efficiency. Thus, the only way to improve conversion efficiency in rudorffite photovoltaic systems would be to use multijunction or tandem ideas. For three distinct rudorffite materials—Ag3BiI6 (1.71 eV), Ag2BiI5 (1.90 eV), and AgBiI4 (1.87 eV)—a number of parameters, including absorber thickness, electron transport layer thickness, hole transport layer thickness, absorber defects, and interference defects, are optimized. For every rudorffite material, the optimization efforts produce outstanding results that led to a notable increase in efficiency. The efficiency of Ag3BiI6 increases from 5.77% to a remarkable 15.26%. Similarly, there is a significant improvement in the efficiency of Ag2BiI5, with an increase from 4.10 to 10.59%. Finally, AgBiI4 shows significant improvement, with efficiency increasing from 4.06 to 10.44%. The 2T double-junction solar cell configuration is investigated by combining rudorffite top cells with silicon-based bottom cells. According to the results, the efficiency of Ag3BiI6, Ag2BiI5, and AgBiI4 tandem solar cells is 22.31, 18.63, and 18.89%, respectively, showing remarkable improvements over their single-cell counterparts. © 2025 The Author(s). physica status solidi (a) applications and materials science published by Wiley-VCH GmbH.

关键词： Defects

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Design and Optimization of the Porous Metamaterial EM Absorbers in X-band

Design and Optimization of the Porous Metamaterial EM Absorb...

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IEEE International Symposium on Electromagnetic Compatibility (EMC)

作者： Kanat Anurakparadorn Alan Taub Eric Michielssen Macromolecular Science and Engineering Program Department of Material Science and Engineering University of Michigan Ann Arbor Michigan USA Department of Mechanical Engineering University of Michigan Ann Arbor Michigan USA Department of Electrical Engineering and Computer Science University of Michigan Ann Arbor Michigan USA

A strategy that combines experiment and simulation to design and optimize electromagnetic (EM) metamaterial absorbers containing a periodic porous structure is described. The approach provides the ability to produce absorbers that meet multiple user-specified objectives. Using the measured intrinsic properties of the baseline materials as an input to EM-field based computational modelling and optimization, absorption by the studied metamaterials measured by their reflection loss (RL) increases significantly. The resulting metamaterials have the potential for lower cost and lighter weight while providing greater protection than traditional metal gaskets and foams.

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A novel approach to fabricating SUS 316L steel foam using material extrusion additive manufacturing technology

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Journal of materials Research and Technology 2025年 36卷 8219-8229页

作者： Noh-Geon Song So-Yeon Park Jung-Yeul Yun Ju-Yong Kim Kee-Ahn Lee Department of Materials Science and Engineering Inha University Incheon 22212 Republic of Korea Program in Semiconductor Convergence Inha University Incheon 22212 Republic of Korea Metal Powder Department Korea Institute of Materials Science Changwon 51508 Republic of Korea Reprotech Suwon-si 16229 Gyeonggi-do Republic of Korea

This study introduces a novel method for manufacturing porous SUS316L using the metal material extrusion (MEX) process and examines the effects of the powder particle size on the pore structure, gas flowability, and mechanical properties. SUS316L foams were fabricated using powders with average sizes of 50 μm and 8 μm. Open pore diameters were approximately 10 μm for the 50 μm foam and 2 μm for the 8 μm foam. Gas flowability measurements revealed that the 50 μm foam exhibited slope values suitable for filtration applications, whereas the 8 μm foam showed lower flowability due to a reduced pore fraction and size. Compressive testing indicated yield strengths of 82.57 MPa and 141.33 MPa for the 50 μm and 8 μm foams, respectively, demonstrating superior strength-to-weight ratios compared to SUS316L foams fabricated by conventional methods and surpassing the mechanical performance of commercial 316L filters manufactured by powder metallurgy process. These findings highlight the capability of MEX in producing porous SUS316L structures with tunable pores and mechanical properties for various applications.

关键词： Material extrusion additive manufacturing 316L stainless steel Foam Compressive property Gas flowability

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Modulating vectored non-covalent interactions for layered assembly with engineerable properties

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Bio-Design and Manufacturing 2022年第3期5卷 529-539页

作者： Jiahao Zhang Sarah Guerin Haoran Wu Bin Xue Yi Cao Syed A.M.Tofail Yancheng Wang Damien Thompson Wei Wang Kai Tao Deqing Mei Ehud Gazit State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China Future Science Research Institute Hangzhou Global Scientific and Technological Innovation CenterZhejiang UniversityHangzhou 311200China Department of Physics and Bernal Institute University of LimerickCastletroyCo.LimerickLimerick V94T9PXIreland National Laboratory of Solid State Microstructure Department of PhysicsNanjing UniversityNanjing 210093China Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China School of Molecular Cell Biology and Biotechnology George S.Wise Faculty of Life SciencesTel Aviv University6997801 Tel AvivIsrael Department of Materials Science and Engineering Iby and Aladar Fleischman Faculty of EngineeringTel Aviv University6997801 Tel AvivIsrael

Vectored non-covalent interactions—mainly hydrogen bonding and aromatic interactions—extensively contribute to(bio)-organic self-assembling processes and significantly impact the physicochemical properties of the associated ***,vectored non-covalent interaction-driven assembly occursmainly along one-dimensional(1D)or three-dimensional(3D)directions,and a two-dimensional(2D)orientation,especially that of multilayered,graphene-like assembly,has been reported *** this present research,by introducing amino,hydroxyl,and phenyl moieties to the triazine skeleton,supramolecular layered assembly is achieved by vectored non-covalent *** planar hydrogen bonding network results in high stability,with a thermal sustainability of up to about 330°C and a Young’s modulus of up to about 40 *** introducing wrinkles by biased hydrogen bonding or aromatic interactions to disturb the planar organization,the stability ***,the intertwined aromatic interactions prompt a red edge excitation shift effect inside the assemblies,inducing broad-spectrum fluorescence covering nearly the entire visible light region(400–650 nm).We show that bionic,superhydrophobic,pillar-like arrays with contact angles of up to about 170°can be engineered by aromatic interactions using a physical vapor deposition approach,which cannot be realized through hydrogen *** findings show the feasibility of 2D assembly with engineerable properties by modulating vectored non-covalent interactions.

关键词： Vectored non-covalent interactions Layered assembly Supramolecular graphene Engineerable properties Physical vapor deposition

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Assessing Radiative Cooling Textiles for Extreme Thermal Conditions

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IEEE Journal of Selected Topics in Quantum Electronics 2025年第6: Photon. for Climate Chng. Mitigation and Adapt.期31卷

作者： Patel, Diya Karua, Pranto Zhou, Kai Cai, Lili University of Illinois Urbana-Champaign Department of Mechanical Science and Engineering the Grainger College of Engineering UrbanaIL61801 United States University of Illinois Urbana-Champaign Frederick Seitz Materials Research Laboratory the Grainger College of Engineering UrbanaIL61801 United States

Global warming necessitates energy-efficient thermal management solutions, and radiative cooling has emerged as a promising strategy for buildings and wearable applications. Despite significant advancements, the efficacy of these materials under extreme heat conditions remains underexplored. Here, we present a passive radiative daytime cooling (PDRC) -coated high-performance textile based on glass fiber (GF), carbon fiber (CF), and Kevlar (KV), integrating superior optical, thermal, and mechanical properties. Our experiments demonstrate that these textiles achieve high solar reflectivity (93-97%) and infrared emissivity (95-96%), enabling an average 8.3°C of cooling under sunlight compared to cotton. Additionally, these coated textiles offer exceptional durability, maintaining performance under various environmental stressors with minimal degradation. Analytical modeling, combined with experiment testing, further underscores the critical role of high near infrared reflectance in high-temperature environments like fire, providing important insights for extending their applicability to personal protective equipment, emergency wearables, and structural thermal management in extreme conditions. © 1995-2012 IEEE.

关键词： Protective clothing

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Development of Flame Retardant Property on Sodium Silicate Treated Paper Based materials 21

Development of Flame Retardant Property on Sodium Silicate T...

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21st International Union of materials Research Societies International Conference in Asia, IUMRS-ICA 2021

作者： Suttipintu, Thitiporn Lhosupasirirat, Siraprapa Osotchan, Tanakorn Srikhirin, Toemsak Materials Science and Engineering Program School of Materials Science and Innovation Faculty of Science Mahidol University Bangkok10400 Thailand Research Network of NANOTEC Mahidol University National Nanotechnology Center Thailand Department of Physics Faculty of Science Mahidol University 272 Rama VI Road Ratchathewi District Bangkok10400 Thailand

The preparation of cellulose-based flame retardant paper treated with sodium silicate and silicon dioxide (SiO2) colloidal particle by simple immersion process is reported. Cellulose-based paper was preheated at 90°C for surface preparation. The heat treated paper was immersed in solution of sodium silicate-SiO2 at different immersion time ranging from 15 min to 24 hrs. Treated solution diffused into paper coated on the paper fiber and filled the void in the paper microstructure. Treated paper was heated at 90°C to convert an impregnated sodium silicate-SiO2 precursor into silicate framework. The treated paper showed Vsym Si-O-Si from siloxane bond at 792 cm-1 which confirmed a presence of SiO2 in paper. Treated paper at 1 hr immersion showed the highest weight percent gain (WPG) of 40% and total combustion time was improved to 14 sec. © Published under licence by IOP Publishing Ltd.

关键词： Silica

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Complex coating system for improving corrosion resistance of AZ31 magnesium alloy 5

Complex coating system for improving corrosion resistance of...

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5th International Conference: Innovative materials, Structures and Technologies, IMST 2022

作者： Drunka, R. Iesalniece, P. Steins, I. Grase, L. Eiduks, T.V. Savkovs, K. Blumbergs, I. Institute of Materials and surface engineering Faculty of Applied chemistry and Materials science Riga Technical University P. Valdena street 3 RigaLV-1048 Latvia SMW Group Kr. Barona street 3-1 RigaLV-1050 Latvia Institute of Aeronautics Faculty of Mechanical Engineering Transport and Aeronautics Riga Technical University Kipsalas street 6B RigaLV-1068 Latvia

Complex coating for corrosion protection was developed on magnesium alloy AZ31 using plasma electrolytic oxidation (PEO), spray pyrolysis (SP) and two-part paint. PEO coatings were obtained using electrolyte with phosphate modifier. The oxide layer formed via PEO was sealed using pyrolyzed TiO2 and finally coated with spray primer-paint system to further protect the surface. The specimens were tested for corrosion using immersion gravimetric method in 3% NaCl solution for 1 week and mass loss was recorded. Morphology of the PEO and SP coatings were studied using SEM and chemical analysis of SP coating by EDS. It was found that 30 minutes of spray time in SP process caused surface cracks in the coating. Paint was applied in varying numbers of primer and paint layers and 2 layers each produced the best results in terms of corrosion resistance. © 2023 Institute of Physics Publishing. All rights reserved.

关键词： Corrosion resistance

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