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International Journal of Ceramic engineering and science 2020年第2期2卷 83-91页

作者： Kikuchi, Masanori Arioka, Yuki Tafu, Masamoto Irie, Mitsuteru Bioceramics Group National Institute for Materials Science Tsukuba Japan Master's Program in Life Science Innovation University of Tsukuba Tsukuba Japan Department of Applied Chemistry and Chemical Engineering Toyama College National Institute of Technology Toyama Japan Faculty of Engineering University of Miyazaki Miyazaki Japan

Changes in fluoride removal ability of chicken bone char (CBC) were investigated by both remained amounts of carbon including organic substances and crystallite size of hydroxyapatite in the CBC. Carbon contents in CBC were controlled by heating time at 600°C. Although temperature for crystal-grain growth for HAp, 650°C, was higher than 600°C, crystallite size of HAp in CBC increased with heating time. Fluoride ion removal ability positively related to the amount of remaining carbon and negatively related to the square of crystallite size, as an index of surface area, of HAp. These results suggested that fluoride ion removal from water by CBC is not only by ion exchange and/or dissolution-precipitation process, but also by adsorption by carbon and/or temporal capture of fluoride ion by microstructure of carbonate in CBC before immobilize it in apatite structure. © 2019 The Authors. International Journal of Ceramic engineering & science published by Wiley Periodicals, Inc. on behalf of American Ceramic Society.

关键词： Crystallite size

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Statistical Analysis Based Imaging-Free Method for Efficient and Fast Wafer Defect Detection

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IEEE Transactions on Instrumentation and Measurement 2025年

作者： Zhong, Xiang Sun, Yu Zhou, Guangcheng Liu, Yujia Zhu, Yikai Deng, Huaxia Ma, Mengchao Chen, Dong Gong, Xinglong Hefei University of Technology Anhui Province Key Laboratory of Measuring Theory and Precision Instrument School of Instrument Science and OptoElectronics Engineering Anhui Hefei230009 China University of Macau Avenue of University Taipa Macau Special Administrative Region Institute of Applied Physics and Material Engineering China University of Science and Technology of China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern Mechanics Hefei230026 China

This paper proposes an imaging-free method based on single-pixel imaging and statistical analysis for efficient and fast wafer defect detection. Firstly, the chi-square test, a commonly used statistical analysis approach, is used to determine the correlation between projected patterns and the presence or absence of defects in wafers. The selection of the most efficient patterns is informed by the top k chi-square values. Moreover, a straightforward feature calculation method is employed instead of deep learning algorithms to reduce the computing resource requirement. Results show that the average recognition accuracy is 97.16% at a sampling rate of 30.5%, and still reaches 84.69% at a low sampling rate of 1.5%. A comparison of the proposed method with the traditional feature extraction strategy based on CNN models demonstrates that the former decreases the model size by 4-5 orders whilst maintaining comparable accuracy. The statistical analysis based imaging-free method is efficient and resource-friendly, could be a potential solution for wafer defect detection. © 2025 IEEE.

关键词： Feature Selection

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Increasing the mobility and power-electronics figure of merit of AlGaN with atomically thin AlN/GaN digital-alloy superlattices

arXiv

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arXiv 2022年

作者： Pant, Nick Lee, Woncheol Sanders, Nocona Kioupakis, Emmanouil Applied Physics Program University of Michigan Ann ArborMI48109 United States Department of Materials Science and Engineering University of Michigan Ann ArborMI48109 United States Department of Electrical Engineering and Computer Science University of Michigan Ann ArborMI48109 United States

Alloy scattering in random AlGaN alloys drastically reduces the electron mobility and therefore the power-electronics figure of merit. As a result, Al compositions greater than 75% are required to obtain even a two-fold increase of the Baliga figure of merit compared to GaN. However, beyond approximately 80% Al composition, donors in AlGaN undergo the DX transition which makes impurity doping increasingly more difficult. Moreover, the contact resistance increases exponentially with increasing Al content, and integration with dielectrics becomes difficult due to the upward shift of the conduction band. Atomically thin superlattices of AlN and GaN, also known as digital alloys, are known to grow experimentally under appropriate growth conditions. These chemically ordered nanostructures could offer significantly enhanced figure of merit compared to their random-alloy counterparts due to the absence of alloy scattering, as well as better integration with contact metals and dielectrics. In this work, we investigate the electronic structure and phonon-limited electron mobility of atomically thin AlN/GaN digital-alloy superlattices using first-principles calculations based on density-functional and many-body perturbation theory. The band gap of the atomically thin superlattices reaches 4.8 eV, and the in-plane (out-of-plane) mobility is 369 (452) cm2 V-1 s-1. Using the modified Baliga figure of merit that accounts for the dopant ionization energy, we demonstrate that atomically thin AlN/GaN superlattices with a monolayer sublattice periodicity have the highest modified Baliga figure of merit among several technologically relevant ultra-wide band-gap materials, including random AlGaN, β-Ga2O3, cBN, and diamond. Copyright © 2022, The Authors. All rights reserved.

关键词： Aluminum gallium nitride

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Investigating the Biomechanics of Red Blood Cells Through Deformable Interendothelial Slits Model in the Spleen

SSRN

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SSRN 2024年

作者： Li, Guansheng Li, He Ndou, Papa Alioune Franco, Mélanie Li, Xuejin MacDonald, Ian Dao, Ming Buffet, Pierre A. Karniadakis, George Em Division of Applied Mathematics Brown University ProvidenceRI02906 United States School of Chemical Materials and Biomedical Engineering University of Georgia AthensGA30602 United States Université Paris Cité Université des Antilles Inserm Paris75015 France Laboratoire d′Excellence du Globule Rouge Paris75015 France Department of Engineering Mechanics Center for X-Mechanics Zhejiang University Zhejiang Hangzhou310027 China Department of Medical Biophysics Schulich School of Medicine and Dentistry Western University LondonON Canada Department of Materials Science and Engineering Massachusetts Institute of Technology CambridgeMA02139 United States

The spleen constantly clears altered red blood cells (RBCs) from the circulation, tuning the balance between RBC formation (erythropoiesis) and removal. The retention and elimination of RBCs occur predominantly in the open circulation of the spleen, where RBCs must cross submicron-wide inter-endothelial slits (IES). Several experimental and computational studies have illustrated the role of IES in filtrating the biomechanically and morphologically altered RBCs based on a rigid wall assumption. However, these studies also reported that when the size of IES is close to the lower end of clinically observed sizes (less than 0.5 µm), an unphysiologically large pressure difference across the IES is required to drive the passage of normal RBCs, sparking debates on the feasibility of the rigid wall assumption. In this work, We propose two deformable IES models, namely the passive model and the active model, aiming to explore the impact of the deformability of IES on the filtration function of the spleen. In the passive model, we implement the worm-like string model to depict the IES’s deformation as it interacts with blood plasma and allows RBC to traverse. In contrast, the active model involved regulating the IES deformation based on the local pressure surrounding the slit. To demonstrate the validity of the deformable model, we simulate the filtration of RBCs with varied size and stiffness by IES under three scenarios: 1) a single RBC traversing a single slit;2) a suspension of RBCs traversing an array of slits, mimicking in vitro spleen-on-a-chip experiments;3) RBC suspension passing through the 3D spleen filtration unit known as ’the splenon’. Our simulation results of RBC passing through a single slit show that the deformable IES model offers more accurate predictions of the critical cell surface area to volume ratio that dictate the removal of aged RBCs from circulation compared to prior rigid-wall models. Our biophysical models of the spleen-on-a-chip indicate a hier

关键词： Blood

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A Visco-Hyperelastic Model for Hydrogels with Tunable Water Content

SSRN

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SSRN 2022年

作者： Zhong, Danming Xiang, Yuhai Wang, Zhicheng Chen, Zhe Liu, Junjie Wu, Zi Liang Xiao, Rui Qu, Shaoxing Yang, Wei State Key Laboratory of Fluid Power & Mechatronic System Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province Center for X-Mechanics Department of Engineering Mechanics Zhejiang University Hangzhou310027 China Department of Chemical Engineering and Materials Science University of Minnesota Minneapolis55455 United States Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province School of Mechanics and Aerospace Engineering Southwest Jiaotong University Chengdu611756 China Department of Polymer Science and Engineering Zhejiang University Hangzhou310027 China

Hydrogels without special treatment would lose water dramatically, which significantly alters their properties. No physically-based constitutive models have been developed so far to quantify the evolution of visco-hyperelastic responses with water content of hydrogels. In this work, systematical experiments are performed on polyacrylamide (PAAm) hydrogels with varied water content. The results reveal that the increase of modulus caused by deswelling is much more pronounced than the decrease of modulus caused by swelling. A more significant strain-softening phenomenon and a transition from almost pure hyperelastic behaviors to apparent viscoelastic behaviors are observed as the water content decreases. To fully capture the experimental observations, a micromechanical model is developed. In this model, the rate-independent hyperelastic response comes from the contributions of both cross-linked networks and entanglements, while the rate-dependent viscoelastic response arises from the reptation of free chains. The relations between model parameters (e.g., cross-linked shear modulus, entangled shear modulus, and relaxation time) and water content are further derived using the scaling law in polymer physics. The developed visco-hyperelastic model exhibits remarkable prediction ability for PAAm hydrogels with a wide water content distribution. The finite element analysis also verifies that the model can describe the mechanical responses of hydrogels in complex loading conditions. The current work deepens our fundamental understanding on the effect of water content on mechanical behaviors of hydrogels. It also provides an efficient theoretical framework to predict the performance of hydrogels in practical applications. © 2022, The Authors. All rights reserved.

关键词： Hydrogels

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Calcination Temperature-Dependent Structural and Photoluminescence Properties of Hydroxyapatite Derived from Labeo Rohita Fish Scales

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Journal of The Institution of Engineers (India): Series D 2020年第2期101卷 223-232页

作者： Sinha, Arijit Pal, Anindya Santra, A. Murmu, S. Ghorai, U.K. Chowdhury, Amit Roy Banerjee, D. Dr. M.N. Dastur School of Materials Science Engineering Indian Institute of Engineering Science and Technology Botanic Garden Shibpur Howrah711103 India Ramakrishna Mission Vidyamandira Department of Industrial Chemistry & Applied Chemistry Swami Vivekananada Research Centre Belur Math Howrah711202 India Aerospace Engineering and Applied Mechanics Indian Institute of Engineering Science and Technology Botanic Garden Shibpur Howrah711103 India Faculty of Engineering and Computer Science Teerthanker Mahaveer University MoradabadUP244001 India

The nanocrystalline hydroxyapatite was synthesized from Labeo Rohita fish scales by calcination of raw scales at temperatures ranges from 400 to 1000 °C. The synthesized powders were characterized using, X-ray diffraction (XRD), thermogravimetric/differential thermal analyzer (TG–DTA), Fourier transform infrared spectroscopy, scanning and high-resolution transmission electron microscope and energy-dispersive X-ray analysis, respectively. Crystallite size, crystallinity and lattice parameters of HAp were evaluated from XRD, and it is shown that the average crystallite sizes were significantly enhanced with the calcination temperature attending its maximum value at ~ 40 nm. TG–DTA analysis predicts the thermal stability of the samples, and it has been observed that the thermal stability increases with the calcination temperature. Moreover, a detailed photoluminescence study of the as-synthesized samples has been carried out for the first time and an appropriate excitation energy gives rise to several distinct peaks in the emission spectra which has not been reported previously. © 2020, The Institution of Engineers (India).

关键词： Optical properties

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Effect of pyrolysis temperature on characteristics of tunable magnetic biochar synthesized from watermelon rind and its tetracycline adsorption performance

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Journal of the Taiwan Institute of Chemical Engineers 2024年 160卷

作者： Thairattananon, Phisit Le, Giang T.T. Matsumura, Yukihiko Wu, Kevin C.W. Charinpanitkul, Tawatchai Department of Chemical Engineering Faculty of Engineering Center of Excellence in Particle and Material Processing Technology Chulalongkorn University Bangkok10330 Thailand Institute of Fundamental and Applied Sciences Duy Tan University Ho Chi Minh700000 Viet Nam Faculty of Environmental and Chemical Engineering Duy Tan University Da Nang550000 Viet Nam Mechanical Engineering Program Graduate School of Advanced Science and Engineering Kagamiyama Hiroshima Higashi-Hiroshima739-8527 Japan Department of Chemical Engineering National Taiwan University Taipei10617 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Chung-Li Taoyuan Taiwan Research Network of NANOTEC-KU on Nanocatalyst and Nanomaterials for Sustainable Energy and Environment Bangkok10900 Thailand

Background: Tetracycline is an emerging contaminant in water reservoirs, causing undesirable influences on human society. The promising usage of magnetic biochar (MBC) derived from watermelon rind has been explored in the adsorption of various contaminants owing to its high specific surface area and separability;however, the temperature-dependent changes of MBC and its sorption ability toward antibiotics have not been widely examined. Method: Tunable MBCs could be synthesized via simple pyrolysis of watermelon rind impregnated with FeCl3 at different temperatures (700–900 °C). The as-synthesized MBCs were characterized using scanning electron microscopy (SEM), an elemental analyzer, N2 adsorption/desorption, Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffractometry (XRD), and vibrating sample magnetometry (VSM). Then Tetracycline, an emerging contaminant in water reservoirs, was employed as the target contaminant, while adsorption kinetics, isotherm, the effect of pH, and reusability were investigated. Significant findings: The tunability of as-synthesized MBCs could be observed by their distinct changes in structural characteristics when varying pyrolysis temperature. MBC synthesized at 900 °C (MBC900) possessed a high-specific surface area (401 m2.g−1) and saturation magnetization (55.29 emu.g−1), resulting in a greater amount of sorption sites. Tetracycline adsorption by MBCs followed a pseudo-second-order kinetic model and fitted well with the Freundlich model. MBC900 is an excellent adsorbent with a maximum adsorption capacity of 77.6 mg.g−1 and could be used for at least five cycles with an insignificant decrease in the adsorption capacity. © 2024 Taiwan Institute of Chemical Engineers

关键词： Adsorption

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Investigation on cutting fluid use in finish milling of polylactide (PLA) 3D-printed parts

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Procedia CIRP 2025年 133卷 656-661页

作者： Margaux Lorenzoni Laurent Spitaels Edouard Rivière-Lorphèvre Jérémy Odent Rachid M’Saoubi Liam Cloëz Michaël Fontaine François Ducobu Machine Design and Production Engineering Lab – Research Institute for Materials Science and Engineering University of Mons Place du Parc 20 7000 Mons Belgium Laboratory of Polymeric and Composite Materials (LMPC) – Center of Innovation and Research in Materials and Polymers (CIRMAP) University of Mons Place du Parc 20 7000 Mons Belgium R&D Material and Technology Development Seco Tools AB Björnbacksvägen 2 SE-737 82 Fagersta Sweden Department of Mechanical Engineering Sciences - Division of Production and Materials Engineering Lund University Ole Römers väg 1 SE-221 00 Lund Sweden FEMTO-ST Institute – Applied Mechanics Dept. Université de Franche-Comté – SUPMICROTECH – CNRS Rue de l’épitaphe 24 F-25000 Besançon France

Fused Filament Fabrication (FFF) is an additive manufacturing process based on Material Extrusion (MEX) of polymeric filament. This manufacturing technology is commonly used for personalized production applications and prototyping, allowing to obtain customized parts with complex geometries at a low cost. However, this production technique has its limitations regarding dimensional accuracy and surface roughness of the final parts. To overcome these limitations, finish milling is considered to be a promising technique as it is widely used for metallic parts. Yet, the specific thermal properties of polymers such as low thermal conductivity and low melting temperature are adding a challenge in the determination of optimal cutting conditions. In this context, the use of cutting fluid could be the key to keep the material from melting during milling. Therefore, this paper proposes to compare the impact of using a compressed air flow to dry conditions on the cutting forces and the surface quality obtained on 3D-printed polylactide (PLA) parts. The qualification test of the tool-material couple standard (NF E 66-520-6) will be used as a guideline to determine the relevance of cutting fluid use for cutting conditions varying around an operating point. Moreover, simulated cutting forces using a mechanistic model will be compared to experimental data to evaluate the applicability of the model.

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Characteristics of low-pressure-plasma-processed NiRu-MOFs/nickel foam for Hydrogen evolution reaction

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Physica Scripta 2024年第4期99卷 045605-045605页

作者： Yu, Shuo-En Wang, Ying-Chyi Tseng, Chia-Yun Cheng, I-Chun Chen, Jian-Zhang Graduate School of Advanced Technology National Taiwan University Taipei City10617 Taiwan Graduate Institute of Applied Mechanics National Taiwan University Taipei City10617 Taiwan Advanced Research Center for Green Materials Science and Technology National Taiwan University Taipei City10617 Taiwan Graduate Institute of Photonics and Optoelectronics Department of Electrical Engineering National Taiwan University Taipei City10617 Taiwan

NiRu bimetallic metal-organic frameworks (NiRu-MOFs) are grown by a simple hydrothermal method on nickel foam (NF) as an the electrocatalyst for the hydrogen evolution reaction. Low-pressure plasmas of pure Ar, 95%Ar + 5%H2, and 95% Ar + 5%O2 are used for the post-treatment of the NiRu-MOFs. NiRu-MOFs-AO with post-plasma treatment with 95%Ar + 5%O2 show the lowest overpotential of 123.3 mV at a current density of 10 mA cm−2 and a Tafel slope of 72.0 mV dec−1 in 1 M KOH electrolyte. Electrochemical impedance spectroscopy results indicate that post-plasma treatment can further reduce the charge transfer resistance. Moreover, the electric double-layer capacitance (Cdl) is calculated based on the cyclic voltammetry results, and the electrocatalyst subjected to 95%Ar + 5%O2 post-plasma treatment shows a 2Cdl value of 3.69 mF/cm2, suggesting a larger electrochemically active surface area after oxygen-containing-plasma treatment. © 2024 IOP Publishing Ltd.

关键词： Electrochemical impedance spectroscopy

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Antibiofilm and immunomodulatory resorbable nanofibrous filing for dental pulp regenerative procedures

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Bioactive materials 2022年第10期7卷 173-186页

作者： Mauricio Gonçalves da Costa Sousa Gabriela Conceiçao de Almeida Danilo Cesar Martins Mota Rosiane Andrade da Costa Simoni Campos Dias Samuel Nunes Limberger Frank Ko Li Ting Lin Evan FHaney Hashem Etayash Beverlie Baquir Michael J.Trimble Ya Shen Zheng Su Markus Haapasalo Daniel Pletzer Letícia Chaves de Souza Glaucia Schuindt Teixeira Renato M.Silva Robert E.W.Hancock Octavio Luiz Franco Taia Maria Berto Rezende Post-Graduation Program in Genomic Sciences and Biotechnology Catholic University of BrasíliaBrasíliaBrazil Dentistry Course Catholic University of BrasíliaBrasíliaBrazil Post-Graduation Program in Health Sciences University of BrasíliaBrazil LIMA Chemistry InstituteUniversity of Brasília-UNBBrasíliaBrazil Animal Biology Department Campus Darcy RibeiroUniversidade de BrasíliaBrazil Department of Materials Engineering Faculty of Applied ScienceUniversity of British ColumbiaVancouverCanada Department of Microbiology and Immunology University of British ColumbiaVancouverBCCanada Department of Oral Biological and Medical Sciences Faculty of DentistryUniversity of British ColumbiaVancouverCanada Department of Microbiology and Immunology University of OtagoDunedinNew Zealand Department of Endodontics School of DentistryUniversity of Texas Health Science Center at HoustonHoustonUSA Department of Prosthesis Faculty of DentistryRio de Janeiro State UniversityRio de JaneiroBrazil Post-Graduation Program in Biotechnology Catholic University Dom BoscoCampo GrandeMato Grosso do SulBrazil

Multifunctional scaffolds with host defense peptides designed for regenerative endodontics are desirable nanobiotechnological tools for ***,different scaffolds were tested for use during the pulp revascularization process,including poly(vinyl alcohol)-PVA hydrogels or resins,collagen hydrogels and poly(vinyl alcohol)PVA/Chitosan(PVA/CS)*** on time to degradation(21 days),nanofibers were chosen to be incorporated with ciprofloxacin and IDR-1002(each at 50 mg/g).Nanofibers containing ciprofloxacin and IDR-1002 had anti-biofilm activity against Enterococcus faecalis,Staphylococcus aureus and a multispecies oral biofilm,besides anti-inflammatory *** in vivo subcutaneous tissue response to tooth fragments filled with nanofibers demonstrated a pulp-like tissue formation,when compared to empty teeth ***,we designed a strong antimicrobial,immunomodulatory and regenerative candidate for pulp revascularization and regeneration procedures.

关键词： Regenerative endodontics Scaffolds Nanofibers Host defense peptides Ciprofloxacin IDR-1002

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