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17th Unified International Technical Conference on Refractories, UNITECR 2022

作者： Moreira, M.H. Dal Pont, S. Tengattini, A. Luz, A.P. Cunha, T.M. Ausas, R.F. Pandolfelli, V.C. Federal University of Sao Carlos Graduate Program in Materials Science and Engineering SP Sao Carlos Brazil 3SR Université Grenoble Alpes Grenoble France Large Scale Structures Institut Laue-Langevin Grenoble France Institute of Mathematical and Computer Sciences University of São Paulo São Carlos Brazil

The drying of refractory monolithics is one of the main drawbacks of this class of materials due to its implication on the production halt of many industrial equipment. This is especially true for calcium aluminate cement (CAC)-bonded castables, where the vapor derived from the unreacted water and dehydration reactions can pressurize yielding cracks and explosions of the ceramic lining. Numerous advances on additives have been made to increase these materials' resistance to explosive spalling, however, the fundamentals of the physical phenomena that yields such a problem remain an open issue. For years, the techniques used to study this process were limited to indirect tests, such as the thermogravimetric analysis or the pressure and temperature measurements of samples being unidirectionally heated. Recently, direct techniques such as nuclear magnetic resonance and X-ray tomography were applied in the context of regular concrete on fire scenarios. The current work presents preliminary results of neutron tomography applied to monitoring the drying of refractory castables. The overall behavior of the castable was qualitatively similar to those observed for regular concrete, and the results provide information that can be successfully applied on numerical simulations of larger pieces with dimensions closer to the industrial ones, overcoming the main drawback of such techniques, their small sample dimensions. © 2022 Unified International Technical Conference on Refractories, UNITECR 2022 - Proceedings. All rights reserved.

关键词： Drying

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Investigation of Sm Addition on Microstructural and Optical Properties of CoFe Thin Films

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materials 2023年第15期16卷 5380-5380页

作者： Liu, Wen-Jen Chang, Yung-Huang Chiang, Chia-Chin Lai, Jian-Xin Chen, Yuan-Tsung Chen, Hsiung-Liang Lin, Shih-Hung Department of Materials Science and Engineering I-Shou University Kaohsiung840 Taiwan Bachelor Program in Industrial Technology National Yunlin University of Science and Technology 123 University Road Section 3 Yunlin Douliou640301 Taiwan Department of Mechanical Engineering National Kaohsiung University of Science and Technology Kaohsiung City80778 Taiwan Graduate School of Materials Science National Yunlin University of Science and Technology 123 University Road Section 3 Yunlin Douliou640301 Taiwan Department of Electronic Engineering National Yunlin University of Science and Technology 123 University Road Section 3 Yunlin Douliou640301 Taiwan

CoFe-based alloys and rare earth (RE) elements are among the most studied materials in applying magnetic devices to improve soft magnetic characteristics. A series of Co40Fe40Sm20 films are deposited on a glass substrate via the sputtering technique, followed by an annealing process to investigate their effect on microstructural and optical properties of Co40Fe40Sm20 films. In this study, the increase in the thickness of Co40Fe40Sm20 films and annealing temperatures resulted in a smoother surface morphology. The 40 nm Co40Fe40Sm20 films annealed 300 °C are expected to have good wear resistance and adhesive properties due to their high values of H/E ratio and surface energy. Optical transparency also increased due to the smoother surface of the Co40Fe40Sm20 films. © 2023 by the authors.

关键词： Iron alloys

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Low Threshold Plasmonic Lattice Laser Based on CsPbBr3 Quantum Dots with Directional Emission

Low Threshold Plasmonic Lattice Laser Based on CsPbBr3 Quant...

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Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Di Xing Cheng-Chieh Lin Ya-Lun Ho Yang-Chun Lee Mu-Hsin Chen Bo-Wei Lin Chun-Wei Chen Jean-Jacques Delaunay School of Engineering The University of Tokyo Tokyo Japan International Graduate Program of Molecular Science and Technology (NTU-MST) National Taiwan University and Academia Sinica Taipei Taiwan Department of Materials Science and Engineering National Taiwan University Taipei Taiwan Molecular Science and Technology Program Taiwan International Graduate Program (TIGP) Academia Sinica Taipei Taiwan Center of Atomic Initiative for New Materials (AI-MAT) National Taiwan University Taipei Taiwan

Metallic nanoparticles array is served as a promising way to realize on-chip lasers. To achieve high-performance lasers, efficient gain media are also critical. Here, we present a pressure-assisted process for CsPbBr3...

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Thermodynamics of the Solid-Liquid Phase Equilibrium of a Binary System: Effect of a Chemical Reaction in the Liquid and Epitaxial Strain in the Solid

SSRN

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SSRN 2023年

作者： Deymier, Alix C. Deymier, Pierre Alix Muralidharan, Krishna Latypov, Marat I. Department of Biomedical Engineering UConn Health FarmingtonCT06030 United States Department of Materials Science and Engineering University of Arizona TucsonAZ85721 United States Graduate Interdisciplinary Program in Applied Mathematics University of Arizona TucsonAZ85721 United States

We introduce two thermodynamics models of solid-liquid phase equilibrium of a binary system in the presence of (a) a chemical reaction in the liquid involving only one of the binary components and, (b) strain-inducing epitaxial conditions on the solid in addition to the chemical reaction in the liquid. These models show the existence of the counter intuitive behavior that epitaxy may promote recrystallization of the solid in spite of the reaction driving dissolution. The conditions for this recrystallization behavior are determined by the value of the epitaxial lattice matching composition, the temperature and the overall composition of the binary solid-liquid system. © 2023, The Authors. All rights reserved.

关键词： Chemical reactions

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Fabrication of superabsorbent fibrous membranes via a homemade green centrifugal spinning system for the efficient removal of excess water in patients with kidney failure

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Journal of Membrane science 2023年第1期683卷

作者： Yang, I-Hsuan Sasaki, Makoto Takahashi, Kaho Uto, Koichiro Lin, Feng-Huei Ebara, Mitsuhiro Research Center for Macromolecules and Biomaterials National Institute for Materials Science 1-1 Namiki Tsukuba305-0044 Japan Department of Biomedical Engineering College of Medicine and College of Engineering National Taiwan University No. 49 Fanglan Rd Taipei10672 Taiwan Institute of Biomedical Engineering and Nanomedicine National Health Research Institutes No. 35 Keyan Road Zhunan Miaoli County35053 Taiwan Graduate School of Science and Technology University of Tsukuba 1-1 Tennodai Tsukuba305-8577 Japan Graduate School of Industrial Science Tokyo University of Science 1-3 Kagurazaka Shinjuku Tokyo162-8601 Japan

Fibrous membranes have attracted attention as advanced absorbents for dialysis treatment due to their efficient removal properties. However, traditional fabrication methods remain expensive, time-consuming, inconvenient, and non-ecofriendly in resource-poor environments. In this study, poly(acrylic acid)-ethylene glycol (PAA-EG) superabsorbent fibrous membranes fabricated via a homemade green centrifugal spinning system for mass production were designed to efficiently remove excess water from kidney failure patients. The designed system could produce PAA-EG fibrous membranes with a uniform fiber diameter of 1.77 ± 0.67 μm and a high production rate of 50 mg/min of dry fibrous membranes. The efficacy and safety of the materials were characterized and evaluated, including a comparison with PAA-EG films, both in vitro using a mimicked wearable dialysis device and in porcine blood. Results showed that the liquid could be quickly absorbed into the polymer and the network structure of PAA-EG fibrous membranes with 6.53 times more water than PAA-EG films with no cytotoxicity and excellent hemocompatibility. Furthermore, the prepared fibrous membranes could selectively absorb water in the blood without affecting other large molecules in the blood, thereby achieving higher compatibility with the body. Thus, the described strategy of PAA-EG fibrous membranes could serve as suitable superabsorbents in wearable dialysis devices for removing excess water from kidney failure patients. © 2023 Elsevier B.V.

关键词： Ethylene glycol

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Real-time temperature correction for magnetoresistive biosensors integrated with temperature modulator

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Biosensors and Bioelectronics: X 2023年 14卷 100356页

作者： Kim, Songeun Wang, Shan X. Lee, Jung-Rok Division of Mechanical and Biomedical Engineering Ewha Womans University Seoul03760 Korea Republic of Graduate Program in Smart Factory Ewha Womans University Seoul03760 Korea Republic of Department of Materials Science and Engineering Stanford University StanfordCA93405 United States Department of Electrical Engineering Stanford University StanfordCA93405 United States

Magnetoresistance-based biosensors utilize changes in electrical resistance upon varying magnetic fields to measure biological molecules or events involved with magnetic tags. However, electrical resistance fluctuates with temperature. To decouple unwanted temperature-dependent signals from the signal of interest, various methods have been proposed to correct signals from magnetoresistance-based biosensors. Yet, there is still a need for a temperature correction method capable of instantaneously correcting signals from all sensors in an array, as multiple biomarkers need to be detected simultaneously with a group of sensors in a central laboratory or point-of-care setting. Here we report a giant magnetoresistive biosensor system that enables real-time temperature correction for individual sensors using temperature correction coefficients obtained through a temperature sweep generated by an integrated temperature modulator. The algorithm with individual temperature correction coefficients obviously outperformed that using the average temperature correction coefficient. Further, temperature regulation did not eliminate temperature-dependent signals completely. To demonstrate that the method can be used in biomedical applications where large temperature variations are involved, binding kinetics experiments and melting curve analysis were conducted with the temperature correction method. The method successfully removed all temperature-dependent artifacts and thus produced more precise kinetic parameters and melting temperatures of DNA hybrids. © 2023 The Authors

关键词： Kinetics

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High-Order Nonlinear Electrophoresis in a Nematic Liquid Crystal

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Physical Review Letters 2024年第15期132卷 158102-158102页

作者： Mojtaba Rajabi Taras Turiv Bing-Xiang Li Hend Baza Dmitry Golovaty Oleg D. Lavrentovich Advanced Materials and Liquid Crystal Institute Kent State University Kent Ohio 44242 USA Department of Physics Kent State University Kent Ohio 44242 USA College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology) Nanjing University of Posts and Telecommunications Nanjing 210023 China Department of Mathematics The University of Akron Akron Ohio 44325-4002 USA Materials Science Graduate Program Kent State University Kent Ohio 44242 USA

Electrophoresis is the motion of particles relative to a surrounding fluid driven by a uniform electric field. In conventional electrophoresis, the electrophoretic velocity grows linearly with the applied field. Nonlinear effects with a quadratic speed vs field dependence are gaining research interest since an alternating current field could drive them. Here, we report on the giant nonlinearity of electrophoresis in a nematic liquid crystal in which the speed grows with the fourth and sixth powers of the electric field. The mechanism is attributed to the shear thinning of the nematic environment induced by the moving colloid. The observed giant nonlinear effect dramatically enhances the efficiency of electrophoretic transport.

关键词： Electrophoresis Non-Newtonian fluids Nonlinear dynamics in fluids Colloids Liquid crystals Nematic liquid crystals Optical microscopy Rheology techniques

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Developments in the utilization of heterogeneous catalysts for biodiesel generation: An update on recent advancements

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Journal of the Taiwan Institute of Chemical Engineers 2024年

作者： Parameshwar, Sai Agnihotri, Mayank Bhan, Uday Nangan, Senthilkumar Verma, Deepak Rajendran, Saravanan Jain, Siddharth Department of Petroleum Engineering and Earth Sciences UPES Dehradun248007 India Metallurgy and Materials Science Research Institute Chulalongkorn University Bangkok10330 Thailand International Graduate Program of Nanoscience and Technology Chulalongkorn University Bangkok10330 Thailand Instituto de Alta Investigacion Universidad de Tarapacá Arica1000000 Chile Department of Mechanical Engineering UPES Dehradun248007 India

Background: Biodiesel is one of the ecofriendly energy sources that can be generated from edible, non-edible, waste, and algae feedstocks. Over time, the utilization of different kinds of heterogeneous catalysts has been proven critical in the manufacture of biodiesel from diverse feedstocks. They exhibit better reusability and easier separation compared to the homogenous catalysts. Methods: In this work, the advances in the use of heterogeneous catalysts for biodiesel production from 2018 to 2024 have been evaluated. The process parameters like alcohol to oil molar ratio (M/O), catalyst concentration (%), reaction time and reaction temperature (RT), reusability of the catalyst, etc. are evaluated. The catalysts derived from waste materials through the calcination process are an efficient and cost-effective substitute for conventional catalysts. Nanomaterials, due to their small size and higher aspect ratio, provide very high efficiency and reusability in catalytic reactions. Significant findings: The heterogeneous catalysts are also found to be highly reusable for multiple cycles and the leaching of active sites, clogging of pore spaces of catalyst, etc. are the major causes of catalyst deactivation. Magnetic heterogeneous catalysts have shown good biodiesel yields and high reusability. Also, naturally occurring calcium oxide and potassium compounds present in waste derived catalysts helped to give high biodiesel yields. The future direction in the path of development of heterogeneous catalysts from cheap, abundant, and environmentally benign materials. The synthesis of heterogeneous catalysts from waste materials addresses the issue of waste disposal and converting solid waste to value-added catalysts. The life cycle assessment studies, encompassing heterogeneous catalyst synthesis, feedstock oil extraction, biodiesel production, and fuel combustion may give valuable input on the environmental impact of the entire process. © 2024

关键词： Potassium compounds

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Exotic Magnetism in Perovskite KOsO3

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Physical Review Letters 2024年第15期132卷 156701-156701页

作者： Jie Chen Hongze Li Javier Gainza Angel Muñoz Jose A. Alonso Jue Liu Yu-Sheng Chen Alexei A. Belik Kazunari Yamaura Jiaming He Xinyu Li John B. Goodenough J.-S. Zhou Materials Science and Engineering program Mechanical Engineering University of Texas at Austin Austin Texas 78712 USA Instituto de Ciencia de Materiales de Madrid CSIC Cantoblanco E-28049 Madrid Spain Universidad Carlos III Avenida Universidad 30 E-28911 Leganés-Madrid Spain Neutron Scattering Division Oak Ridge National Laboratory Oak Ridge Tennessee 37830 USA NSF’s ChemMatCARS The University of Chicago Chicago Illinois 60437 USA Research Center for Materials Nanoarchitectonics (MANA) National Institute for Materials Science Namiki 1-1 Tsukuba Ibaraki 305-0044 Japan Graduate School of Chemical Sciences and Engineering Hokkaido University North 10 West 8 Kita-ku Sapporo Hokkaido 060-0810 Japan

A new perovskite KOsO3 has been stabilized under high-pressure and high-temperature conditions. It is cubic at 500 K (Pm−3m) and undergoes subsequent phase transitions to tetragonal at 320 K (P4/mmm) and rhombohedral (R−3m) at 230 K as shown from refining synchrotron x-ray powder diffraction (SXRD) data. The larger orbital overlap integral and the extended wave function of 5d electrons in the perovskite KOsO3 allow to explore physics from the regime where Mott and Hund’s rule couplings dominate to the state where the multiple interactions are on equal footing. We demonstrate an exotic magnetic ordering phase found by neutron powder diffraction along with physical properties via a suite of measurements including magnetic and transport properties, differential scanning calorimetry, and specific heat, which provide comprehensive information for a system at the crossover from localized to itinerant electronic behavior.

关键词： Magnetic interactions Magnetic order Antiferromagnets Density functional theory First-principles calculations Neutron diffraction Sintering

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Terahertz Time-Domain Imaging for Radiotherapy Treatment Monitoring in Pancreatic Ductal Adenocarcinoma

Terahertz Time-Domain Imaging for Radiotherapy Treatment Mon...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Debamitra Chakraborty Bradley N. Mills Jing Cheng Ivan Komissarov Scott Gerber Roman Sobolewski Materials Science Graduate Program University of Rochester Rochester New York Laboratory for Laser Energetics University of Rochester Rochester New York Department of Surgery University of Rochester Medical Center Rochester New York Department of Electrical and Computer Engineering University of Rochester Rochester New York

ISBN: (纸本)9798350369311

Terahertz time-domain imaging was performed of stereotactic body radiotherapy-treated murine pancreatic ductal adenocarcinoma (PDAC) with a high spatial resolution. To generate 2D maps of the tissue samples, the refractive index and absorption coefficient were used as imaging markers extracted with the maximum a-posteriori probability (MAP) estimation algorithm. The results were then compared with the terahertz maps of untreated murine PDAC tissue samples and demonstrated that terahertz imaging can probe physical changes with high sensitivity in the tissue post treatment.

关键词： Maximum a posteriori estimation Terahertz wave imaging Laser theory Sensitivity Refractive index Radiation therapy Time-domain analysis Spatial resolution Probes Monitoring

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