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Effect of ambient polycyclic aromatic hydrocarbons and nicotine on the structure of Aβ_(42) protein

Frontiers of Environmental science & engineering 2023年第2期17卷 9-18页

作者： Samal Kaumbekova Mehdi Amouei Torkmahalleh Naoya Sakaguchi Masakazu Umezawa Dhawal Shah Department of Chemical and Materials Engineering School of Engineering and Digital SciencesNazarbayev UniversityKabanbay Batyr 53Nur-Sultan010000Kazakhstan Department of Materials Science and Technology Faculty of Advanced EngineeringTokyo University of Science6-3-1 NiijukuKatsushikaTokyo 125-8585Japan

Recent studies have correlated the chronic impact of ambient environmental pollutants like polycyclic aromatic hydrocarbons(PAHs)with the progression of neurodegenerative disorders,either by using statistical data from various cities,or via tracking biomarkers during in-vivo *** different neurodegenerative disorders,PAHs are known to cause increased risk for Alzheimer’s disease,related to the development of amyloid beta(Aβ)peptide ***,the complex molecular interactions between peptide monomers and organic pollutants remains *** this work,we performed an atomistic molecular dynamics study via GROMACS to investigate the structure of Aβ_(42) peptide monomer in the presence of benzo[a]pyrene,nicotine,and *** the results revealed strong hydrophobic,and hydrogen-bond based interactions between Aβpeptides and these environmental pollutants that resulted in the formation of stable intermolecular *** strong interactions affected the secondary structure of the Aβ_(42) peptide in the presence of the organic pollutants,with almost 50%decrease in theα-helix and 2%–10%increase in theβ-sheets of the ***,the undergoing changes in the secondary structure of the peptide monomer in the presence of the pollutants under the study indicates an enhanced formation of Aβpeptide oligomers,and consequent progression of Alzheimer’s disease.

关键词： Polycyclic aromatic hydrocarbons Nicotine toxicology Aβ_(42)peptide Alzheimer’s disease Molecular dynamics simulations Environmental pollution

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High-rate sodium-ion storage of vanadium nitride via surface-redox pseudocapacitance

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Interdisciplinary materials 2023年第3期2卷 434-442页

作者： Qiulong Wei Tingyi Huang Xiaojuan Huang Binhao Wang Yalong Jiang Dafu Tang Dong-Liang Peng Bruce Dunn Liqiang Mai Department of Materials Science and Engineering Fujian Key Laboratory of Surface and Interface Engineering for High Performance MaterialsCollege of MaterialsXiamen UniversityXiamenChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanChina Department of Materials Science and Engineering University of California Los AngelesLos AngelesCaliforniaUSA

Vanadium nitride(VN)electrode displays high-rate,pseudocapacitive responses in aqueous electrolytes,however,it remains largely unclear in nonaqueous,Na+-based *** traditional view supposes a conversion-type mechanism for Na+storage in VN anodes but does not explain the phenomena of their size-dependent specific capacities and underlying causes of pseudocapacitive charge storage ***,we insightfully reveal the VN anode exhibits a surface-redox pseudocapacitive mechanism in nonaqueous,Na+-based electrolytes,as demonstrated by kinetics analysis,experimental observations,and first-principles *** ex situ X-ray photoelectron spectroscopy and semiquantitative analyses,the Na+storage is characterized by redox reactions occurring with the V5+/V4+to V3+at the surface of VN particles,which is different from the well-known conversion reaction *** pseudocapacitive performance is enhanced through nanoarchitecture design via oxidized vanadium states at the *** optimized VN-10 nm anode delivers a sodium-ion storage capability of 106 mAh g−1 at the high specific current of 20 A g−1,and excellent cycling performance of 5000 cycles with negligible capacity *** work demonstrates the emerging opportunities of utilizing pseudocapacitive charge storage for realizing high-rate sodium-ion storage applications.

关键词： high-rate capability pseudocapacitance sodium-ion storage vanadium nitride

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Topological magnetoelectric response in ferromagnetic axion insulators

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National science Review 2024年第2期11卷 8-14页

作者： Yuhao Wan Jiayu Li Qihang Liu Department of Physics and Shenzhen Institute for Quantum Science and Engineering(SIQSE) Southern University of Science and Technology Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices Southern University of Science and Technology Guangdong Provincial Key Laboratory for Computational Science and Material Design Southern University of Science and Technology

The topological magnetoelectric effect （TME） is a hallmark response of the topological field theory,which provides a paradigm shift in the study of emergent topological ***,its direct observation is yet to be realized due to the demanding magnetic configuration required to gap all surface ***,we theoretically propose that axion insulators with a simple ferromagnetic configuration,such as the MnBi2Te4/（Bi2Te3）nfamily,provide an ideal playground to realize the *** the designed triangular prism geometry,all the surface states are magnetically *** a vertical electric field,the surface Hall currents give rise to a nearly half-quantized orbital moment,accompanied by a gapless chiral hinge mode circulating in ***,the orbital magnetization from the two topological origins can be easily distinguished by reversing the electric *** work paves the way for direct observation of the TME in realistic axion-insulator materials.

关键词： topological magnetoelectric effect axion insulator magnetic topological materials

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Bidirectionally polarizing surface chemistry of heteroatom-doped carbon matrix towards fast and longevous lithium-sulfur batteries

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Chinese Chemical Letters 2023年第7期34卷 313-317页

作者： Hongyang Li Bo Cai Yingze Song Wenlong Cai Gaoran Li MIIT Key Laboratory of Advanced Display Materials and Devices College of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing210094China State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts&TelecommunicationsNanjing210023China State Key Laboratory of Environmental-Friendly Energy Materials School of Materials Science and EngineeringSouthwest University of Science and TechnologyMianyang621010China Department of Advanced Energy Materials College of Materials Science and EngineeringSichuan UniversityChengdu 610064China

Herein, a bidirectional polarization strategy is proposed for hosting efficient and durable lithium-sulfur battery(Li-S) electrochemistry. By co-doping electronegative N and electropositive B in graphene matrix(BNrGO), the bidirectional electron redistribution enables a higher polysulfide affinity over its monodoped counterparts, contributing to strong sulfur immobilization and fast conversion kinetics. As a result,BNrGO as the cathode host matrix realizes excellent cycling stability over 1000 cycles with a minimum capacity fading of 0.027% per cycle, and superb rate capability up to 10 C. Meanwhile, decent areal capacity(6.46 m Ah/cm^(2)) and cyclability(300 cycles) are also achievable under high sulfur loading and limited electrolyte. This work provides instructive insights into the interaction between doping engineering and sulfur electrochemistry for pursuing superior Li-S batteries.

关键词： Lithium-sulfur battery Facile synthesis Heteroatom doping Bidirectional polarization Shuttle effect

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DEVELOPMENT AND CHARACTERIZATION OF SODIUM ALGINATE-ZnO NANOPARTICLE REINFORCED COMPOSITES FOR BIOMEDICAL APPLICATIONS

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UPB Scientific Bulletin, Series B: Chemistry and materials science 2024年第3期86卷 157-168页

作者： Doicin, Irina Elena Neacsu, Ionela Andreea Ene, Vladimir Lucian Birca, Alexandra Catalina Andronescu, Ecaterina Department of Science and Engineering of Oxide Materials and Nanomaterials Faculty of Chemical Engineering and Biotechnologies National University of Science and Technology POLITEHNICA Bucharest Romania Center for Advanced Research on New Materials Products and Innovative Processes—CAMPUS Research Institute National University of Science and Technology POLITEHNICA Bucharest Romania

The field of pharmaceutical science is witnessing a surge in interest in developing controlled-release dosage forms to optimize therapeutic outcomes. Biodegradable polymers like chitosan, sodium alginate, and starch offer significant advantages due to their biocompatibility and ability to form diverse drug delivery systems. Alginate, derived from brown seaweed or bacterial sources, is particularly promising for its antimicrobial properties. This study aims to evaluate the characteristics of a porous composite material comprising alginate (Alg) as a matrix and microwave-assisted hydrothermal synthesized zinc oxide nanoparticles (ZnO NPs) as a reinforcing agent. Leveraging the distinctive properties of both alginate and ZnO NPs, this research seeks to develop a material with prospective antimicrobial efficacy and reduced cytotoxicity, potentially applicable in biomedical fields, particularly for advanced wound dressing solutions. The innovation in this study also stems from incorporating salicylic acid (SA) into the proposed Alg-ZnO wound dressings, addressing critical aspects such as infection control, inflammation reduction, and tissue regeneration promotion. The obtained materials were characterized morphologically and spectroscopically, as well as tested to establish cytotoxicity and biocompatibility. Thus, SEM/EDS and FTIR analysis indicated a good structural integrity and high functional performance of the composites. XTT and LDH assays indicated high cellular viability and a minimal cell membrane damage, which recommends them for biomedical applications. © 2024, Politechnica University of Bucharest. All rights reserved.

关键词： Salicylic acid

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Two-stage dynamic recrystallization and texture evolution in Al-7Mg alloy during hot torsion

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International Journal of Minerals,Metallurgy and materials 2024年第8期31卷 1900-1911页

作者： Kwang Tae Son Chang Hee Cho Myoung Gyun Kim Ji Woon Lee School of Mechanical Industrialand Manufacturing EngineeringOregon State UniversityCorvallis OR 97331USA Department of Materials Science Engineering Northwestern UniversityEvanston IL 60208USA Research Institute of Industrial Science and Technology(RIST) Pohang 37673Rep.of Korea Division of Advanced Materials Engineering Kongju National UniversityCheonan 31080Rep.of Korea Center for Advanced Materials and Parts of Powders Kongju National UniversityCheonan 31080Rep.of Korea

Hot torsion tests were performed on the Al-7Mg alloy at the temperature ranging from 300 to 500℃ and strain rates between 0.05 and 5 s^(-1) to explore the progressive dynamic recrystallization(DRX)and texture *** DRX behavior of the alloy manifested two distinct stages:Stage 1 at strain of≤2 and Stage 2 at strains of≥*** Stage 1,there was a slight increase in the DRXed grain fraction(X_(DRX))with predominance of discontinuous DRX(DDRX),followed by a modest change in X_(DRX) until the transition to Stage *** 2 was marked by an accelerated rate of DRX,culminating in a substantial final X_(DRX) of~*** backscattered diffraction(EBSD)analysis on a sample in Stage 2 revealed that continuous DRX(CDRX)predominantly occurred within the(121)[001]grains,whereas the(111)[110]grains underwent a geometric DRX(GDRX)evolution without a noticeable sub-grain ***,a modified Avrami’s DRX kinetics model was utilized to predict the microstructural refinement in the Al-7Mg alloy during the DRX *** this kinetics model did not accurately capture the DDRX behavior in Stage 1,it effectively simulated the DRX rate in Stage *** texture index was employed to assess the evolution of the texture isotropy during hot-torsion test,demonstrating significant improvement(>75%)in texture randomness before the commencement of Stage *** initial texture evolution is attributed to the rotation of parent grains and the substructure evolution,rather than to an increase in X_(DRX).

关键词： Al-7Mg alloys hot deformation hot torsion tests dynamic recrystazlliation microstructure texture

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FE Analysis of Additive Manufacturing of Al Magnetic Shield for EV Wireless Charging

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Journal of The Institution of Engineers (India): Series D 2024年第3期105卷 1763-1770页

作者： Santhosh Kumar, S. Datta, Shubhabrata Center for Composites and Advanced Materials Department of Mechanical Engineering SRM Institute of Science and Technology Kattankulathur Chengalpattu district Tamil Nadu 603204 India

The present study describes the finite element analysis of additive manufacturing of an electric vehicle component, a magnetic shield for wireless charging using aluminum alloy. Metal additive manufacturing involves making substantial and complex components layer by layer using laser powder bed fusion process. The AlSi10Mg alloy is used here as the material for the simulation of the process for the designed component. The drawback of the laser powder bed fusion process is the emergence of thermal residual stress resulting from sudden heating and cooling. This research aims to reduce this residual stress and part distortion with the help of finite element simulation, varying the machine parameters, viz. laser beam diameter, laser power, powder layer thickness, laser scan speed, and hatch distance. The Ansys Additive print software is used for the present simulation. Based on the simulation result, we found an optimized Al magnetic shield machine parameter that reduces the residual stress and part deformation. The optimized machine parameters are found to be scanning speed of 2000 mm/s, layer thickness of 50 μm, laser power of 350 W, laser beam diameter of 100 μm and hatch spacing of 200 μm. © The Institution of Engineers (India) 2023.

关键词： Finite element method

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Electromagnetic wave absorption performance and rheological behavior of rubber composites with low mass filling rate carbon nanofiber aerogel

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Journal of Materiomics 2024年第4期10卷 928-936页

作者： Zhiyi Zhang Bicheng Zhou Lan Jia Wenwen Yu Qiang Zheng College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan030024China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan030000China rd Research Institute of China Electronics Technology Group Corporation Taiyuan030032China Department of Polymer Science&Engineering Zhejiang UniversityHangzhou310027China

With the development of electronic information science and technology,electromagnetic information security and electromagnetic pollution become more and more *** wave absorption(EMWA)rubber based on the absorbent of carbon with low density and good corrosion resistance is a kind of good EMWA materials for solving electromagnetic information security and electromagnetic *** this article,three-dimensional network structure carbon nanofiber aerogels(3DNSCAs)are prepared by vacuum annealing of three-dimensional network structure agarose/zinc acetate obtained by freeze-drying of agarose/zinc acetate *** EMWA rubber composites with 2.2%(in mass)3DNSCAs have almost the same density as silicone rubber(PDMS),and the dispersity of 3DNSCAs in PDMS is studied by rheological *** effective absorption bandwidth(EAB,frequency for reflection loss<–10 dB)of the 2 mm thick PDMS/C-800 is 4 GHz,and the minimum value of reflection loss(RL_(min))is−52 dB with the thickness of 3.5 *** PDMS/C-1000 with the thickness of 3.5 mm has an EAB up to 4.8 *** cross section(RCS)reduction of PDMS/C-800 can achieve 20 dB⋅m^(2) at the frequency of 6 GHz.

关键词： Electromagnetic wave absorption Rubber composite Carbon aerogel Rheological behavior Power loss density

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TiZrHfNb refractory high-entropy alloys with twinning-induced plasticity

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Journal of materials science & technology 2024年第20期187卷 72-85页

作者： Shubin Wang Da Shu Peiying Shi Xianbing Zhang Bo Mao Donghong Wang Peter.K.Liaw Baode Sun Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming and State Key Lab of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518055China Department of Materials Science and Engineering The University of TennesseeKnoxvilleTN37996USA

The twinning-induced plasticity(TWIP)effect has been widely utilized in austenite steels,β-Ti alloys,and recently developed face-centered-cubic(FCC)high-entropy alloys(HEAs)to simultaneously enhance the tensile strength and *** this study,for the first time,the TWIP effect through hierarchical{332}<113>mechanical twinning has been successfully engineered into the TiZrHfNb refractory HEAs by decreasing temperature and tailoring the content of Nb to destabilize the BCC *** cryogenic tem-perature,the comprehensive hierarchical{332}<113>mechanical twins are activated in TiZrHfNb_(0.5) alloy from micro-to nanoscale and progressively segment the BCC grains into nano-scale islands during de-formation,ensuring sustainable strain hardening capability and eventually achieving a substantial 35%uniform tensile *** addition,at 77 K,the tensile strength and uniform elongation of TiZrHfNbx alloys can further be adjusted by a moderate increase of *** results above shed new light on the de-velopment of high-performance refractory HEAs with a high and adjustable strength and ductility com-bination down to the cryogenic temperature.

关键词： Refractory high-entropy alloys Cryogenic temperature Twinning induced plasticity Hierarchical twins Tensile properties

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Anode surface engineering of zinc-ion batteries using tellurium nanobelt as a protective layer for enhancing energy storage performance

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Journal of Energy Chemistry 2024年第5期92卷 113-123页

作者： Soobeom Lee Yeonjin Je Boeun Seok Hyun Tae Kim Yong-Ryun Jo Soong Ju Oh Byoungyong Im Dae Guen Kim Sang-Soo Chee Geon-Hyoung An Department of Energy System Engineering Gyeongsang National UniversityJinju 52725Republic of Korea Nano Convergence Materials Center Korea Institute of Ceramic Engineering and Technology(KICET)Jinju 52851Republic of Korea Department of Materials Science and Engineering Korea UniversitySeoul 02841Republic of Korea School of Materials Science and Engineering Gyeongsang National UniversityJinju 52828Republic of Korea GIST Advanced Insitute of Instrumental Analysis(GAIA) Electron Microscopy LaboratoryGwangju Institute of Science and TechnologyGwangju 61005Republic of Korea Center for Advanced Materials and Processing Institute for Advanced EngineeringYongin 17180Republic of Korea Department of Energy Engineering Gyeongsang National UniversityJinju 52725Republic of Korea

Over the years,zinc-ion batteries(ZIBs)have attracted attention as a promising next-generation energy storage technology because of their excellent safety,long cycling performance,eco-friendliness,and high-power ***,issues,such as the corrosion and dissolution of the Zn anode,limited wet-tability,and lack of sufficient nucleation sites for Zn plating,have limited their practical *** introduction of a protective layer comprising of tellurium(Te)nanobelts onto the surface of Zn anode has emerged as a promising approach to overcome these limitations and improve the electrochemical behav-ior by enhancing the safety and wettability of ZIBs,as well as providing numerous nucleation sites for Zn *** the presence of a Te-based protective layer,the energy power density of the surface-engineered Zn anode improved significantly(ranging from 310 to 144 W h kg^(-1),over a power density range of 270 to 1,800 W kg^(-1)),and the lifespan capability was *** results demonstrate that the proposed strategy of employing Te nanobelts as a protective layer holds great promise for enhancing the energy storage performance of zIBs,making them even more attractive as a viable energy storage solution forthefuture.

关键词： Zn ion battery Anode Protective layer Tellurium Nanobelt

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