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Superhydrophobic fluoride conversion coating on bioresorbable magnesium alloy——fabrication,characterization,degradation and cytocompatibility with BMSCs

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Journal of Magnesium and Alloys 2021年第4期9卷 1252-1266页

作者： Chunyan Zhanga Shiyu Zhang Dongwei Sun Jiajia Lin Fancheng Meng Huinan Liu School of Materials Science&Engineering Chongqing University of TechnologyNo.69 Hongguang AvenueChongqing 400054China Department of Bioengineering and the Materials Science and Engineering ProgramUniversity of CaliforniaRiverside900 University AvenueMSE 205RiversideCA 92521USA

A micro-nano structure CaF_(2)chemical conversion layer was prepared on fluoride-treated AZ31 alloy,then the composite fluoride conversion film(CaF_(2)/MgF_(2))was modified by stearic acid(SA)and fabricated a superhydrophobic *** fluoride-treated magnesium,fluoride conversion film and superhydrophobic coating were characterized by SEM,EDS,XRD and *** properties of coatings1 adhesion and corrosion resistance were evaluated via tape test and electrochemical *** cytocompatibility of the MgF_(2),CaF_(2)and superhydrophobic CaF_(2)/SA surface was investigated with bone marrow-derived mesenchymal stem cells(BMSCs)by direct culture for 24 *** results showed that the superhydrophobic fluoride conversion coating composed of inner MgF_(2)layer and the outer CaF_(2)/SA composite layer had an average water contact angle of 152°.SA infiltrated into the micro-nano structure CaF_(2)layer and formed a strong adhesion with CaF_(2)***,the super-hydrophobic coating showed higher barrier properties and corrosion resistance compared with the fluoride conversion film and fluoride-treated AZ31 *** BMSC adhesion test results demonstrated MgF_(2)CaF_(2)and CaF_(2)/SA coatings were all nontoxic to *** the condition of in direct contact with cells,MgF_(2)showed higher cell density and enhanced the BMSCs proliferation,while CaF_(2)and CaF_(2)/SA coating showed no statistically difference in cell density compared with glass reference but the CaF_(2)and CaF_(2)/SA coating were not conducive to BMSCs adhesion.

关键词： Biodegradable Magnesium alloy Superhydrophobic Fluoride conversion film Cytocompatibility

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Peripheral octamethyl-substituted nickel(Ⅱ)-phthalocyanine-decorated carbon-nanotube electrodes for high-performance all-solid-state flexible symmetric supercapacitors

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Journal of Energy Chemistry 2023年第1期76卷 214-225,I0006页

作者： Yu Wang Minzhang Li Rajendran Ramachandran Haiquan Shan Qian Chen Anxin Luo Fei Wang Zong-Xiang Xu Department of Chemistry Southern University of Science and TechnologyShenzhen 518055GuangdongChina Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices Southern University of Science and TechnologyShenzhen 518055GuangdongChina School of Microelectronics Southern University of Science and TechnologyShenzhen 518055GuangdongChina SUSTech Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055GuangdongChina Engineering Research Center of Integrated Circuits for Next-Generation Communications Ministry of EducationShenzhen 518055GuangdongChina

Construction of advanced electrode materials with unique performance for supercapacitors(SCs)is essential to achieving high implementation in the commercial ***,we report a novel peripheral octamethyl-substituted nickel(Ⅱ)phthalocyanine(Ni Me_(2)Pc)-based nanocomposite as the electrode material of all-solid-state *** highly redox-active NiMe_(2)Pc/carboxylated carbon nanotube(CNTCOOH)dendritic nanocomposite provides rapid electron/electrolyte ion-transport pathways and exhibits excellent structural stability,resulting in high-capacity activity and impressive cycling *** composite prepared with the optimized weight ratio of Ni Me_(2)Pc:CNT-COOH(6:10)showed the highest specific capacitance of 330.5 F g^(-1)at 0.25 A g^(-1).The constructed NiMe_(2)Pc/CNT-COOH-based all-solid-state symmetric SC device showed excellent performance with a maximum energy density of 22.8 Wh kg^(-1)and outstanding cycling stability(111.6%retained after 35,000 cycles).Moreover,flexible carbon cloth significantly enhanced the energy density of the NiMe_(2)Pc/CNT-COOH all-solid-state symmetric device to 52.1 Wh kg^(-1)with 95.4%capacitance retention after 35,000 cycles,and it could be applied to highperformance flexible electronics *** findings provide a novel strategy to design phthalocyanine-based electrode materials for next-generation flexible SC devices.

关键词： Nickel phthalocyanine Carbon nanotubes Nanocomposites Flexible supercapacitors Cycling stability

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Anomalous properties of spark plasma sintered boron nitride solids

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materials Today 2025年 86卷 42-51页

作者： Biswas, Abhijit Serles, Peter Alvarez, Gustavo A. Schimpf, Jesse Hache, Michel Kong, Jonathan Demingos, Pedro Guerra Yuan, Bo Pieshkov, Tymofii S. Li, Chenxi Puthirath, Anand B. Gao, Bin Gray, Tia Zhang, Xiang Murukeshan, Jishnu Vajtai, Robert Dai, Pengcheng Singh, Chandra Veer Howe, Jane Zou, Yu Martin, Lane W. Clancy, James Patrick Tian, Zhiting Filleter, Tobin Ajayan, Pulickel M. Department of Materials Science and Nanoengineering Rice University HoustonTX77005 United States Department of Mechanical & Industrial Engineering University of Toronto 5 King's College Road TorontoM5S 3G8 Canada Sibley School of Mechanical and Aerospace Engineering Cornell University IthacaNY14853 United States Department of Materials Science and Engineering University of California Berkeley94720 United States Department of Materials Science and Engineering University of Toronto 184 College St TorontoM5S 3E4 Canada Department of Physics and Astronomy McMaster University HamiltonL8S 4M1 Canada Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Physics and Astronomy Rice University HoustonTX77005 United States Materials Sciences Division Lawrence Berkeley National Laboratory Berkeley94720 United States

Hexagonal boron nitride (h-BN) is a brittle ceramic with a layered structure, however, recent experiments have suggested that inter-layer structural engineering could be key to new structural and functional properties. Here we report the scalable bulk synthesis of high-density crystalline h-BN solids, by using high-temperature spark plasma sintering (SPS) of h-BN powders, which show high values of mechanical strength, ductility, dielectric constant, thermal conductivity, and exceptional neutron radiation shielding capability. Through exhaustive characterizations we reveal that SPS induces non-basal plane crystallinity, twisting of layers, and facilitates inter-grain fusion with a high degree of in-plane alignment across macroscale dimensions, resulting in near-theoretical density and improved properties. Our findings highlight the importance of material design, via new approaches such as layer twisting and interlayer interconnections, to create novel ceramics with properties that could go beyond their intrinsic limits. © 2025

关键词： Ductility

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7th International Conference of Computer and Informatics engineering, IC2IE 2024

作者： Wandy, Wandy Adi, Kusworo Ayu, Media Anugerah Diponegoro University Doctoral Program of Information Systems School of Postgraduate Studies Semarang Indonesia Diponegoro University Faculty of Science and Mathematics Department of Physics Semarang Indonesia Sampoerna University Faculty of Engineering and Technology Department of Computer Science South Jakarta Indonesia

ISBN: (纸本)9798331505530

Full-marathon and Half-marathon distances are categorized as road running. Full-marathon running is becoming increasingly popular, and Half-marathon is increasing worldwide in both sexes and all age groups. Some aspects might relate to Full-marathon and Half-marathon running performance during training and races. Technology also plays an essential role in supporting runners and running races. Technology like artificial intelligence (AI) now supports the running athlete, not only predicting performance and results. It can also be used later to help the coach generate training programs for the athlete. This research aimed to find many aspects of marathons and performance and analyze them to see if artificial intelligence could later support them. It used secondary data and a systematic literature review proposed by Kitchenham. Out of the 58 articles, 21 of them (36.21%) received a score of 1 from Q1. Additionally, 19 articles (32.76%) received a score of 1 from both Q2 and Q3. Among the 58 articles, 9 (15.52%) received a total score of 3, with all three Q1, Q2, and Q3 scores being 1. This indicates that artificial intelligence will likely support the content of these nine articles. Several factors were also discovered to be connected to marathons and athletic performance. These findings suggested that additional investigation into marathons and performance, later backed by artificial intelligence, remained pertinent and essential. © 2024 IEEE.

关键词： artificial intelligence aspects marathon performance

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High-Throughput Powder Diffraction Using White X-Ray Beam and a Simulated Energy-Dispersive Array Detector

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engineering 2022年第3期8卷 81-88页

作者： Xiaoping Wang Weiwei Dong Peng Zhang Haoqi Tang Lanting Zhang Tieying Yang Peng Liu Hong Wang X.-D.Xiang Materials Genome Initiative Center&School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055China Department of Materials Science and Engineering&Department of Physics Southern University of Science and TechnologyShenzhen 518055China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201204China Guangdong Provincial Key Laboratory of Energy Materials for Electric Power Southern University of Science and TechnologyShenzhen 518055China Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices Southern University of Science and TechnologyShenzhen 518055China

High-throughput powder X-ray diffraction(XRD)with white X-ray beam and an energy-dispersive detector array is demonstrated in this work on a CeO;powder sample on a bending magnet synchrotron beamline at the Shanghai Synchrotron Radiation Facility(SSRF),using a simulated energy-dispersive array detector consisting of a spatially scanning silicon-drift detector(SDD).Careful analysis and corrections are applied to account for various experimental hardware-related and diffraction angle-related *** resulting diffraction patterns show that the relative strength between different diffraction peaks from energy-dispersive XRD(EDXRD)spectra is consistent with that from angle-resolved XRD(ARXRD),which is necessary for analyzing crystal structures for unknown *** X-ray fluorescence(XRF)signal is collected *** counts from all pixels are integrated directly by energy,while the diffraction spectra are integrated by d-spacing,resulting in a much improved peak strength and signal-to-noise(S/N)ratio for the array *** comparison with ARXRD,the diffraction signal generated by a white X-ray beam over monochromic light under the experimental conditions is about 104 times *** full width at half maximum(FWHM)of the peaks in q-space is found to be dependent on the energy resolution of the detector,the angle span of the detector,and the diffraction *** is possible for EDXRD to achieve the same or even smaller FWHM as ARXRD under the energy resolution of the current detector if the experimental parameters are properly chosen.

关键词： High-throughput experiment White beam X-ray diffraction Energy-dispersive array detector Energy-dispersive X-ray diffraction Angle-resolved X-ray diffraction

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Reusable Hydrogen Storage Tank with Flange Design 10

Reusable Hydrogen Storage Tank with Flange Design

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10th International Conference on Applied System Innovation, ICASI 2024

作者： Li, Yun-Qi Chen, Hsuan-Jung Yang, Hsi-Wen Chen, Chih-Yuan Chang, Shao-Fu Chen, Ssu-Ying Chen, Chien-Chon College of Engineering and Science Ph.D. Program in Materials and Chemical Engineering National United University Miaoli Taiwan Michigan State University Department of Chemistry MI48824 United States National United University Department of Materials Engineering Miaoli Taiwan Graduate Institute of Intellectual Property National Taipei University of Technology Taiwan National United University Department of Energy Engineering Miaoli Taiwan

ISBN: (纸本)9798350394924

For how to store and transport hydrogen, the first thought is to store hydrogen directly in the cylinder. However, this method is not desirable, because generally at least 700 atm high pressure, the hydrogen contained in the cylinder to be useful. Therefore it is very unsafe at such high pressures. In This paper, we design and production of a new generation of solid-state hydrogen storage and discharge container. The goal of 'development of solid-state hydrogen storage technology' is to break through the bottlenecks of hydrogen storage technology safety, hydrogen storage density, high-efficiency hydrogen absorption and release, transportation safety, and engineering practice. © 2024 IEEE.

关键词： Aluminum

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Control of skyrmion lattice order in the van der Waals ferromagnet Fe3GeTe2 16

Control of skyrmion lattice order in the van der Waals ferro...

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Spintronics XVI 2023

作者： Li, Yue McCray, Arthur R.C. Wang, Wei Basnet, Rabindra Pandey, Krishna Ma, Xuedan Hu, Jin Petford-Long, Amanda K. Phatak, Charudatta Materials Science Division Argonne National Laboratory LemontIL60439 United States Applied Physics Program Northwestern University EvanstonIL60208 United States Center for Nanoscale Materials Argonne National Laboratory LemontIL60439 United States Department of Physics University of Arkansas FayettevilleAR72701 United States Materials Science and Engineering Program University of Arkansas FayettevilleAR72701 United States Department of Materials Science and Engineering Northwestern University EvanstonIL60208 United States

ISBN: (纸本)9781510665262

Van der Waals ferromagnets are an intersting class of materials for exploring fundamental physics of magnetic order in the 2D limit as well as for technological applicaitons due to possibility of creating novel heterostructures. These materials have shown to host magnetic skyrmion lattices with their organization controlled by the magnetic properties such as anisotropy, exchange, and Dzyaloshinkii-Moriya interaction. For technological applications, it is also necessary to understand to the behavior of skyrmions in response to electric currents. In this work, we show the effect of electric current pulses on the magnetic skyrmions formed in Fe3GeTe2which has a Curie temperature of 220 K. We demonstrate via real-space in situ imaging using Lorentz transmission electron microscopy (LTEM) the effect of temperture and pulse width. © 2023 SPIE.

关键词： High resolution transmission electron microscopy

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Wafer-Scale Uniform Synthesis of 2D Transition Metal Dichalcogenides Single Crystals via Chemical Vapor Deposition

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Accounts of materials Research 2022年第2期3卷 161-174页

作者： Pengfei Yang Lijie Zhu Fan Zhou Yanfeng Zhang School of Materials Science and Engineering and Academy for Advanced Interdisciplinary Studies Peking UniversityBeijing 100871People’s Republic of China

CONSPECTUS:Two-dimensional(2D)semiconducting transition metal dichalcogenides(TMDCs),most with a formula of MX2(M=Mo,W;X=S,Se,etc.),have emerged as ultrathin channel materials in next-generation electronics,due to their atomic thickness,tunable bandgap,and relatively high carrier mobility,*** propel their practical applications in integrated circuits,large-scale preparation of large-domain MX2 single crystals and singlecrystal films is significantly *** all the synthetic methods,chemical vapor deposition(CVD)has shown great promise for the controllable syntheses of large-area uniform 2D materials with electronic-grade quality and reasonable *** far,intensive efforts have been devoted to the controllable growth of MX2 single crystals with large sizes,controlled thicknesses,fast growth rates,and unidirectional ***,due to the complexity of the precursor species(mostly like solid powders)and their gradient feeding distributions along the gas flow direction,it is still a huge challenge to synthesize large-area MX2 samples with centimeter-scale uniformity,which inevitably hinders their practical applications in *** significantly,due to the noncentrosymmetric structures of MX2,antiparallel domains and twin grain boundaries usually evolved on most substrates(e.g.,mica,C-sapphire).These defective grain boundaries usually exhibit metallic characteristics and serve as conducting channels,seriously impairing the electrical and optical properties of related devices.

关键词： Transition hinder devoted

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Porous Poly(vinylidene fluoride-co-hexafluoropropylene)/copper oxide nanocomposite membranes for piezoelectric strain sensing

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Discover Applied sciences 2025年第5期7卷 1-17页

作者： Al-Ejji, Maryam Promi, Tamanna Sangor, Farah Al-Awa, Zinab Bonthula, Sumalatha Radhika, V. Ponnamma, Deepalekshmi Center for Advanced Materials Qatar University P O Box 2713 Doha Qatar Department of Biological and Environmental Sciences Qatar University P O Box 2713 Doha Qatar Department of Chemical Engineering University of Calicut Kerala Thenhipallam India Materials Science and Technology Program Department of Mathematics Statistics and Physics College of Arts and Sciences Qatar University Doha2713 Qatar

The emerging field of porous piezoelectric strain sensors attracted a wide range of applications in healthcare monitoring, wearable electronics, and other dynamic applications due to their durability, high sensitivity, and real-time monitoring. This study presents the development of porous poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP)/copper oxide (CuO) nanocomposite membranes for piezoelectric strain sensing. The morphology and the dispersion of CuO nanoparticles and nanofibers in PVDF piezoelectric films with different nano-CuO contents are studied by X-ray diffraction, Fourier transform infrared spectrum, scanning electron microscopy and dielectric studies. The PVDF-HFP acts as a scaffold, allowing ions to flow within the porous percolated channels, resulting in a highly robust membrane with desired dielectric properties. The DMA studies enhanced the strain sensing performance of the 3.5 and 7 wt.% CuO nanofibers loaded with PVDF-HFP membranes compared with the 3.5 and 7 wt.% CuO nanoparticles and pristine membranes. The dielectric properties of the composites also showed high storage values for the CuO/PVDF-HFP samples compared to the pristine polymer. Moreover, the surface water contact angles of the membranes have slightly increased after loading the nanomaterial into the PVDF-HFP matrix, which strongly influenced the surface energies, indicating hydrophobicity. The current study, thus, demonstrates the piezoelectric strain sensing devices made from PVDF-HFP/CuO nanofibers for humid atmospheres. © The Author(s) 2025.

关键词： Fourier transform infrared spectroscopy

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Blockchain-Based Architecture for Improving Maize Supply Chain Performance: Designing an Aggregator Platform

Blockchain-Based Architecture for Improving Maize Supply Cha...

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2023 IEEE International Conference on Industrial engineering and engineering Management, IEEM 2023

作者： Lumbantobing, R.D.H. Chandima Ratnayake, R.M. Simatupang, T.M. Okdinawati, L. Mulyono, N.B. School of Business and Management Bandung Institute of Technology Indonesia Del Institute of Technology Faculty of Vocational Studies Indonesia University of Stavanger Faculty of Science and Technology Department of Mechanical and Structural Engineering and Materials Science Norway

ISBN: (纸本)9798350323153

Blockchain technology (BcT) presents opportunities for improving transparency and traceability in an agriculture supply chain. The BcT enables the combination of the immutable decentralized data ledger with smart contracts to unify different actors in an agriculture supply chain into a digital platform. The latter is an executable program that enables automatic running if certain conditions are met. It brings BcT implementation in improving supply chain performance in minimizing non-added value processes, especially from the farmer's perspective. An agriculture supply chain comprises several actors with various digital infrastructures and standards. The information regarding products and services is also scattered, and individual actors' various infrastructure facilities silo the access. Thus, this study carries a maize supply chain (MSC) case study. This manuscript presents the development of a conceptual architecture, using the BcT and smart contract feature, for an MSC's aggregator platform. © 2023 IEEE.

关键词： aggregator design blockchain technology Maize supply chain smart contract

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