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Tailoring the Microstructure of a Cu-0.7cr-0.07zr Alloy Submitted to Ecap at Cryogenic Temperature for Improved Thermal Stability

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SSRN

SSRN 2022年

作者： Oliveira, Pedro H.F. Magalhães, Danielle Cristina Camilo Unti, Luiz Fernando K. Cintho, O.M. Kliauga, Andrea M. Sordi, Vitor Luiz Federal University of São Carlos Graduate Program in Materials Science and Engineering Rod. Washington Luís km 235 São Carlos SP CEP 13565-905 Brazil Federal University of São Carlos Department of Materials Engineering Rod. Washington Luís km 235 São Carlos SP CEP 13565-905 Brazil Department of Mechanical Engineering Aeronautics Institute of Technology Praça Marechal Eduardo Gomes 50 SP São José dos CamposCEP 12228-900 Brazil Department of Materials Engineering State University of Ponta Grossa Av. General Carlos Cavalcanti PR Ponta GrossaCEP 84030-900 Brazil

Severe Plastic Deformation (SPD) routes, such as Equal Channel Angular Pressing (ECAP), are capable of producing ultrafine-grained (UFG) materials with outstanding mechanical properties. Although grain refinement and the increase in mechanical processing could be enhanced through ECAP processing at cryogenic temperatures, this route presents the drawback of microstructural instability, which is responsible for reversing the gain in mechanical properties and microstructural refinement when the material is stored at room temperature or submitted to relatively high temperatures. Aiming to design severely deformed and stable microstructures, this study investigated pure copper (Cu) and a commercial ITER-grade Cu-0.7Cr-0.07Zr alloy submitted to ECAP at 298 and 123 K followed by annealing heat treatments. ECAP processing introduced a high density of dislocations and vacancy concentration in the materials assessed. Pure Cu showed poor microstructural stability when long-term stored at room temperature after ECAP processing at cryogenic temperatures, and when submitted to annealing post-ECAP processing. In contrast, the Cu-0.7Cr-0.07Zr alloy submitted to cryo-ECAP showed outstanding thermal stability even when submitted to annealing at 673 K for 120 min. For this alloy, the fine Cr-rich precipitates were responsible for preventing static recovery and preserving a grain size of ~6.6 μm and an area fraction of recrystallized grains of 6.2%. Finally, it was possible to pave the way for the design of refined and stable microstructures after cryo-SPD processing. © 2022, The Authors. All rights reserved.

关键词： Equal channel angular pressing

Photoactivated theranostic nanomaterials based on aggregation-induced emission luminogens for cancer photoimmunotherapy

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Responsive Materials

Responsive materials 2024年第2期2卷

作者： Yuqi Tang Xing Wang Shilin Chen Quan Li Institute of Advanced Materials and School of Chemistry and Chemical Engineering Southeast University Nanjing China Department of Thoracic Surgery The Affiliated Cancer Hospital of Nanjing Medical University Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research Nanjing China Materials Science Graduate Program Kent State University Kent Ohio USA

In this study, a series of high liposoluble near-infrared emissive aggregation-induced emission luminogens with triphenylamine derivatives as donor units and 1-indanone as electron acceptor units are developed. Specifically, MTTOI has promising lipid droplets targeting ability and viscosity-response characteristics, and it can monitor the viscosity fluctuations in living cells in real time. It is found that MTTOI is able to fulfill the activation of the apoptosis-related signaling pathways under white light, and it can also activate the ferroptosis to synergize apoptosis resulting in tumor elimination. Interestingly, the occurrence of ferroptosis is positively related to the enhancement of immunogenic cell-death effect, thus boosting the tumor infiltration of CD8 + T cells and reducing the proportion of regulatory T cells by cooperating with dendritic cells, which can not only carry out primary antitumor treatment, but also prevent tumor metastasis through strong immunological memory effect. Moreover, in vivo experimental results confirm that MTTOI successfully effectuates fatty liver tissue imaging. MTTOI fluorescence signals can be captured at the tumor site after 3 days of administration due to its high fat-solubility and ease of fusion with tumors. This classic example could promote the further development of phototherapeutic agents in preclinical research and clinical applications.

关键词： cancer photoimmunotherapy ferroptosis near-infrared aggregation-induced emission luminogen photoactivated theranostic nanomaterial viscosity response

Influence of Crystallization on Corrosion and Mechanical Properties of Two Novel Fecrmonbb and Fecrmonib Amorphous Alloys

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SSRN

SSRN 2022年

作者： Batalha, Weverson Capute Roche, Virginie Champion, Yannick Mantel, Marc Verdier, Marc Martin, Vincent Kiminami, Claudio Shyint Jorge Junior, Alberto Moreira Moreira Univ. Grenoble Alpes Univ. Savoie Mont Blanc CNRS Grenoble INP LEPMI Grenoble38000 France Institute of Engineering and Management Univ. Grenoble Alpes France Univ. Grenoble Alpes Univ. Savoie Mont Blanc CNRS Grenoble INP SIMAP Grenoble38000 France Graduate Program of Materials Science and Engineering Federal University of São Carlos DEMa São Carlos13565-905 Brazil

The influence of thermally induced devitrification on microstructure, corrosion, and mechanical properties of two novel Fe-based amorphous alloys has been investigated in this work (FeCrMoXB, where X=Nb, Ni). Hence, providing an overview of the perspectives for using these new alloys as coatings. Ribbons were produced by melt spinning. Samples were characterized using X-ray diffraction (XRD), differential scanning calorimetry (DSC), and transmission electron microscopy (TEM), accompanied by chemical analysis via energy dispersive spectroscopy (EDS). As-cast ribbons were amorphous. Considering DSC data of such ribbons, they were heat-treated under an Ar protective atmosphere to simulate crystallization that may occur during coating processing. The mechanical behavior was evaluated by nanoindentation. High hardness (around 14 GPa) and elastic modulus (>220 GPa) were identified for both compositions. Corrosion properties were analyzed by potentiodynamic polarization in seawater at three different pHs. Both compositions in the amorphous state exhibited outstanding corrosion resistance, forming a broad passivation plateau in the various media analyzed. After devitrification, the Nb-containing alloy preserved excellent corrosion behavior, with a slight decrease in corrosivity up to 720°C, better than the Ni-containing alloy that exhibited lower corrosion resistance with good corrosivity kept only up to 690°C. Results indicate outstanding corrosion behavior and wear resistance, indicating that these materials are promising for coating application through different techniques. © 2022, The Authors. All rights reserved.

关键词： Corrosion resistance

Local and global measures of the shear moduli of jammed disk packings

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arXiv 2023年

作者： Zhang, Shiyun Jin, Weiwei Wang, Dong Xu, Ding Zhang, Jerry Shattuck, Mark D. O’Hern, Corey S. Department of Physics University of Science and Technology of China Anhui Hefei230026 China Department of Mechanical Engineering and Materials Science Yale University New HavenCT06520 United States Benjamin Levich Institute and Physics Department The City College of New York New YorkNY10031 United States Department of Physics Yale University New HavenCT06520 United States Department of Applied Physics Yale University New HavenCT06520 United States Graduate Program in Computational Biology and Bioinformatics Yale University New HavenCT06520 United States

Strain-controlled isotropic compression gives rise to jammed packings of repulsive, frictionless disks with either positive or negative global shear moduli. We carry out computational studies to understand the contributions of the negative shear moduli to the mechanical response of jammed disk packings. We first decompose the ensemble-averaged, global shear modulus as hGi = (1 − F−)hG+i + F−hG−i, where F− is the fraction of jammed packings with negative shear moduli and hG+i and hG−i are the average values from packings with positive and negative moduli, respectively. We show that hG+i and h|G−|i obey different power-law scaling relations above and below pN2 ∼ 1. For pN2 > 1, both hG+iN and h|G−|iN ∼ (pN2)β, where β ∼ 0.5 for repulsive linear spring interactions. Despite this, hGiN ∼ (pN2)β0 with β0 & 0.5 due to the contributions from packings with negative shear moduli. We show further that the probability distribution of global shear moduli P(G) collapses at fixed pN2 and different values of p and N. We calculate analytically that P(G) is a Gamma distribution in the pN2 1 limit. As pN2 increases, the skewness of P(G) decreases and P(G) becomes a skew-normal distribution with negative skewness in the pN2 1 limit. We also partition jammed disk packings into subsystems using Delanunay triangulation of the disk centers to calculate local shear moduli. We show that the local shear moduli defined from groups of adjacent triangles can be negative even when G > 0. The spatial correlation function of local shear moduli C(~r) displays weak correlations for pn2sub −2, where nsub is the number of particles within each subsystem. However, C(~r) begins to develop long-ranged spatial correlations with four-fold angular symmetry for pn2sub & 10−2 © 2023, CC BY-NC-ND.

关键词： Elastic moduli

Magnetically Tuned Continuous Transition from Weak to Strong Coupling in Terahertz Magnon Polaritons

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arXiv 2022年

作者： Baydin, Andrey Hayashida, Kenji Makihara, Takuma Tay, Fuyang Ma, Xiaoxuan Ren, Wei Ma, Guohong Noe, G. Timothy Katayama, Ikufumi Takeda, Jun Nojiri, Hiroyuki Cao, Shixun Bamba, Motoaki Kono, Junichiro Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States The Smalley-Curl Institute Rice University HoustonTX77005 United States Division of Applied Physics Graduate School of Engineering Hokkaido University Hokkaido Sapporo060-8628 Japan Department of Physics and Astronomy Rice University HoustonTX77005 United States Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Physics International Center of Quantum and Molecular Structures Materials Genome Institute Shanghai University Shanghai200444 China Department of Physics Graduate School of Engineering Science Yokohama National University Yokohama240-8501 Japan Institute for Materials Research Tohoku University Sendai980-8577 Japan The Hakubi Center for Advanced Research Kyoto University Kyoto606-8502 Japan Department of Physics I Kyoto University Kyoto606-8502 Japan PRESTO Japan Science and Technology Agency Kawaguchi332-0012 Japan Department of Materials Science and NanoEngineering Rice University HoustonTX77005 United States

Depending on the relative rates of coupling and dissipation, a light-matter coupled system is either in the weak- or strong-coupling regime. Here, we present a unique system where the coupling rate continuously increases with an externally applied magnetic field while the dissipation rate remains constant, allowing us to monitor a weak-to-strong coupling transition as a function of magnetic field. We observed a Rabi splitting of a terahertz magnon mode in yttrium orthoferrite above a threshold magnetic field of ∼14 T. Based on a microscopic theoretical model, we show that with increasing magnetic field the magnons transition into magnon polaritons through an exceptional point, which will open up new opportunities for in situ control of non-Hermitian systems. Copyright © 2022, The Authors. All rights reserved.

关键词： Polariton

Corrigendum to "Curcumin-laden dual-targeting fucoidan/chitosan nanocarriers for inhibiting brain inflammation via intranasal delivery" [Int. J. Biol. Macromol. 181 (2021) 835-846]

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International journal of biological macromolecules 2022年 206卷 1040-1041页

作者： Trong-Ming Don Wan-Ju Chang Pei-Ru Jheng Yi-Cheng Huang Er-Yuan Chuang Department of Chemical and Materials Engineering Tamkang University New Taipei City Taiwan College of Life Sciences Department of Food Science National Taiwan Ocean University Keelung Taiwan Graduate Institute of Biomedical Materials and Tissue Engineering International PhD Program in Biomedical Engineering Graduate Institute of Biomedical Optomechatronics School of Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei Taiwan Research Center of Biomedical Device Taipei Medical University Taipei Taiwan Cell Physiology and Molecular Image Research Center Taipei Medical University-Wan Fang Hospital Taipei Taiwan. Cell Physiology and Molecular Image Research Center Taipei Medical University-Wan Fang Hospital Taipei Taiwan. Electronic address: ychuang@mail.ntou.edu.tw. Cell Physiology and Molecular Image Research Center Taipei Medical University-Wan Fang Hospital Taipei Taiwan. Electronic address: eychuang@tmu.edu.tw.

Application of response surface methodology in the characterization and sensorial analysis of Anacardium humile liqueur

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Food Chemistry Advances

Food Chemistry Advances 2023年 3卷

作者： de Oliveira, Caroline Beatriz Queiroz, Betânia Branco Tiago Delalibera, Priscila Navarro, José Pérez Gómez-Alonso, Sérgio Pertuzatti, Paula Becker Graduate Program in Materials Science Institute of Exact and Earth Sciences Federal University of Mato Grosso Avenida Valdon Varjão 6390 Barra do Garças 78600-000 Brazil Graduate Program in Immunology and Basic Parasitology Federal University of Mato Grosso Avenida Valdon Varjão 6390 Barra do Garças 78600-000 Brazil Department of Food Engineering Institute of Exact and Earth Sciences Federal University of Mato Grosso Avenida Valdon Varjão 6390 Barra do Garças 78600-000 Brazil Regional Institute for Applied Scientific Research Castilla-La Mancha University Ronda de Calatrava 7 Ciudad Real 13071 Spain

Anacardium humile, known as “cajuzinho-do-cerrado,” is a native Brazilian Cerrado fruit similar to the cashew but less studied, particularly its phenolic compound content and profile. This study used a factorial design to examine how A. humile concentration and maturation time affect the liqueur's physicochemical attributes, phenolic content, antioxidant capacity, and sensory appeal. The liqueurs exhibited low antioxidant capacities as determined by the 2,2-diphenyl-1-picrylhydrazyl radical scavenging capacity assay (DPPH), ferric ion reducing antioxidant power (FRAP), and 2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonic acid). This is likely attributable to a reduction in phenolic compounds within the liqueurs compared to A. humile. The phenolic compound profile of A. humile showed 11 compounds, comprising 5 flavonols, 3 hydroxycinnamic acids, and 2 hydrolyzable tannins. Treatment 8 (500 g of A. humile and 17 days of maturation) showed the highest value for phenolic compound content. However, with regard to sensory analysis, this was the darkest liqueur and the least accepted test, while Treatment 5 (147.5 g of A. humile and 10 days of maturation) was one of the most accepted and chosen as the best liqueur due to the highest antioxidant capacity by FRAP and DPPH methods. The fusion of technology and factorial design proved efficacious in formulating functional liqueurs. © 2023

关键词： Antioxidant capacity Cajuzinho-do-cerrado Factorial design Phenolic compounds

Topological Surface State Evolution in Bi2Se3 via Surface Etching

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arXiv 2024年

作者： Yue, Ziqin Huang, Jianwei Wang, Ruohan Li, Jia-Wan Rong, Hongtao Guo, Yucheng Wu, Han Zhang, Yichen Kono, Junichiro Zhou, Xingjiang Hou, Yusheng Wu, Ruqian Yi, Ming Department of Physics and Astronomy Rice University HoustonTX77005 United States Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices Center for Neutron Science and Technology School of Physics Sun Yat-Sen University Guangzhou510275 China Institute of Physics Chinese Academy of Sciences Beijing100190 China Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Department of Materials Science and NanoEngineering Rice University HoustonTX77005 United States Department of Physics and Astronomy University of California Irvine IrvineCA92697 United States

Topological insulators are materials with an insulating bulk interior while maintaining gapless boundary states against back scattering. Bi2Se3 is a prototypical topological insulator with a Dirac-cone surface state around Γ. Here, we present a controlled methodology to gradually remove Se atoms from the surface Se-Bi-Se-Bi-Se quintuple layers, eventually forming bilayer-Bi on top of the quintuple bulk. Our method allows us to track the topological surface state and confirm its robustness throughout the surface modification. Importantly, we report a relocation of the topological Dirac cone in both real space and momentum space, as the top surface layer transitions from quintuple Se-Bi-Se-Bi-Se to bilayer-Bi. Additionally, charge transfer among different surface layers is identified. Our study provides a precise method to manipulate surface configurations, allowing for the fine-tuning of the topological surface states in Bi2Se3, which represents a significant advancement towards nano-engineering of topological states. Copyright © 2024, The Authors. All rights reserved.

关键词： Topological insulators

Precision measurements of muonium and muonic helium hyperfine structure at J-PARC

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arXiv 2025年

作者： Strasser, Patrick Abe, Mitsushi Asai, Kanta Fukumura, Seiso Fushihara, Mahiro Goto, Yu Ino, Takashi Iwai, Ryoto Kanda, Sohtaro Kawamura, Shiori Kitaguchi, Masaaki Nishimura, Shoichiro Oku, Takayuki Okudaira, Takuya Powell, Adam Sasaki, Ken-Ichi Shimizu, Hirohiko M. Shimomura, Koichiro Tada, Hiroki Torii, Hiroyuki A. Yamanaka, Takashi Yamazaki, Takayuki 1-1 Oho Ibaraki Tsukuba305-0801 Japan Materials and Life Science Division J-PARC Center 2-4 Shirakata Tokai-mura Naka-gun Ibaraki319-1195 Japan Materials Structure Science Program Graduate Institute for Advanced Studies SOKENDAI 1-1 Oho Ibaraki Tsukuba305-0801 Japan 1-1 Oho Ibaraki Tsukuba305-0801 Japan Graduate School of Science Nagoya University Furo-cho Chikusa-ku Aichi Nagoya464-8601 Japan Department of Physics Niigata University 8050 Ikarashi 2-no-cho Nishi-ku Niigata-shi Niigata950-2181 Japan Facility for Rare Isotope Beams Michigan State University 640 South Shaw Lane East LansingMI48824 United States Kobayashi-Maskawa Institute Nagoya University Furo-cho Chikusa-ku Aichi Nagoya464-8601 Japan 2-4 Shirakata Tokai-mura Naka-gun Ibaraki319-1195 Japan Graduate School of Science and Engineering Ibaraki University 2-1-1 Bunkyo Ibaraki Mito310-8512 Japan Department of Physics and Astronomy University of Calgary 2500 University Drive NW CalgaryABT2N 1N4 Canada School of Science The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-0033 Japan Faculty of Arts and Science Kyushu University 744 Motooka Nishi Fukuoka819-0395 Japan

At the J-PARC Muon science Facility (MUSE), the MuSEUM collaboration is now performing new precision measurements of the ground state hyperfine structure (HFS) of both muonium and muonic helium atoms. High-precision measurements of the muonium ground-state HFS are recognized as one of the most sensitive tools for testing bound-state quantum electrodynamics theory to precisely probe the standard model and determine fundamental constants of the positive muon magnetic moment and mass. The same technique can also be employed to measure muonic helium HFS, obtain the negative muon magnetic moment and mass, and test and improve the theory of the three-body atomic system. Measurements at zero magnetic field have already yielded more accurate results than previous experiments for both muonium and muonic helium atoms. High-field measurements are now ready to start collecting data using the world’s most intense pulsed muon beam at the MUSE H-line. We aim to improve the precision of previous measurements ten times for muonium and a hundred times or more for muonic helium. We review all the key developments for these new measurements, focusing on the high-field experiment, and report the latest results and prospects. Copyright © 2025, The Authors. All rights reserved.

关键词： Microwave spectroscopy