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Okra‑Like Multichannel TiO@NC Fibers Membrane with Spatial and Chemical Restriction on Shuttle‑Effect for Lithium–Sulfur Batteries

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Advanced Fiber materials 2023年第1期5卷 252-265页

作者： Shuai Li Jingchong Liu Linlin Ma Li‑Juan Yu Lanlan Hou Dianming Li Songwei Gao Guichu Yue Zhimin Cui NüWang Xiaoxian Zhao Yong Zhao Key Laboratory of Bio‑Inspired Smart Interfacial Science and Technology of Ministry of Education Beijing Key Laboratory of Bioinspired Energy Materials and DevicesSchool of ChemistryBeijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijing 100191People’s Republic of China Beijing Key Laboratory for Bioengineering and Sensing Technology Daxing Research InstituteSchool of Chemistry and Biological EngineeringUniversity of Science and Technology BeijingBeijing 100083People’s Republic of China Department of Chemistry College of ScienceHebei Agricultural UniversityBaoding 071001People’s Republic of China Research School of Chemistry Australian National UniversityAustralian Capital TerritoryCanberra 2601Australia School of Materials Science and Engineering Lanzhou Jiaotong UniversityLanzhou 730070China

It is especially important to coordinately design the structure and composition of the host in lithium–sulfur batteries(LSBs)for improving its physicochemical adsorption and conversion of lithium polysulfide,which can alleviate the harmful shuttle ***,a self-supporting multichannel nitrogen-doped carbon fibers membrane embedded with TiO nanoparticles(TiO@NC)was constructed as the electrode for *** inner channels and the embedded TiO nanoparticles offer spatial confinement and chemical binding for polysulfides,***,the TiO nanoparticles have abundant oxygen vacancies that promote the conversion of *** addition,the nitrogen-doped carbon skeleton can not only serve as highly conductive transportation paths for electrons,but also integrate with the inner channels to sustain the morphology and bear volume expansion during cycling ***,the fabricated self-supporting quadruple-channel TiO@NC ultrathin fibers electrode exhibits a high initial specific capacity of 1342.8 mAh g^(-1)at 0.5 C and high-rate capability of 505.8 mAh g^(-1)at 4.0 *** addition,it maintains 696.0 mAh g^(-1)over 500 cycles with only 0.059%capacity decay per cycle at the high current density of 2.0 *** multichannel configuration combined with TiO nanoparticles provides a synergetic design strategy for fabricating high-performance electrodes in LSBs.

关键词： Multichannel Electrospinning Hierarchical structure Spatial confinement Chemical binding Lithium–sulfur battery

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Electrochemically Modulated Metasurfaces

Electrochemically Modulated Metasurfaces

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2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Eaves-Rathert, Janna Kovalik, Elena Ugwu, Chibuzor Fabian Pint, Cary L. Valentine, Jason G. Department of Mechanical Engineering Vanderbilt University NashvilleTN37212 United States Interdisciplinary Materials Science Program Vanderbilt University NashvilleTN37212 United States Department of Mechanical Engineering Iowa State University AmesIA50011 United States

Electrochemical intercalation of lithium in titanium dioxide and silicon-based metasurfaces is used to initiate phase changes in a continuously tunable, reversible, and bistable manner for dynamic control over structu... 详细信息

ISBN: (纸本)9781957171258

关键词： Titanium dioxide

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Electrical Characterization of Individual Boron Nitride Nanowall Structures 5th

Electrical Characterization of Individual Boron Nitride Nano...

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5th International Conference on Nanotechnologies and biomedical engineering, ICNBME 2021

作者： Postica, Vasile Schütt, F. Lupan, C. Krüger, H. Adelung, R. Lupan, O. Center for Nanotechnology and Nanosensors Department of Microelectronics and Biomedical Engineering Technical University of Moldova Chisinau Moldova Institute for Materials Science Chair for Functional Nanomaterials Faculty of Engineering Kiel Germany

ISBN: (纸本)9783030923273

In this work, the individual hexagonal boron nitride (h-BN) microtubular structures with different diameter (ranging from ≈0.2 to ≈2.5 μm) and a wall thickness below 25 nm were investigated for the first time by integration on SiO2/Si substrate using a method based on focused ion beam deposition (FIB/SEM). The current-voltage (I-V) measurements were carried out in from a bias of −40 V to +40 V and in a temperature range from 25 to 100 ℃. All fabricated devices showed excellent insulating properties and the resistance of ≈111 GΩ was calculated, which was attributed mainly to the top SiO2 layer of the substrate measured without h-BN. The obtained results elucidate the excellent potential of the boron nitride microtubular structures with nanowalls to be used as high-quality shielding materials of other nano- and microstructures for application in nanoelectronics, nanophotonics and power electronics, where a relatively wide range of operating temperature is necessary. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Silica

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Fabricated technology of biomedical micro-nano hydrogel

Biomedical Technology

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biomedical Technology 2023年 2卷 31-48页

作者： Yang, Shu Wang, Fan Han, Huijie Santos, Hélder A. Zhang, Yu Zhang, Hongbo Wei, Jie Cai, Zhengwei Department of Orthopaedics Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases Shanghai Institute of Traumatology and Orthopaedics Ruijin Hospital Shanghai Jiao Tong University School of Medicine 197 Ruijin 2nd Road Shanghai 200025 China Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China Department of Biomedical Engineering W.J. Korf Institute for Biomedical Engineering and Materials Science University Medical Center Groningen/University of Groningen Groningen 9713 AV Netherlands Pharmaceutical Sciences Laboratory Åbo Akademi University Turku 20520 Finland

Micro-nano hydrogel is a novel functional material that has attracted extensive attention in various fields. Due to the size of micron and nano level, high water content and high specific surface area, the micro-nano hydrogels can achieve minimally invasive repair and are considered as promising agents in tissue repair engineering. In this review, we summarize the design and development of micro-nano hydrogels for biomedical applications, first introduce biopolymers for the synthesis of hydrogels, then introduce the preparation technologies of microgels and nanogels respectively, and systematically summarize the application characteristics and forms of different preparation technologies. Finally, the latest application progresses of microgels in local drug delivery, bone tissue repair, soft tissue repair and immunomodulation are introduced in detail, as well as the latest application progress of nanohydrogels in cartilage repair, antibacterial, antitumor/cancer nerve repair and prevention and diagnosis of diseases, and the key research directions of micro-nano hydrogel preparation technologies in the future are clarified. © 2022 The Authors

关键词： Biopolymers Hydrogel Microgels Nanogels Tissue engineering

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Design and fabrication of universal resolution targets for microsphere-assisted microscopy 31

Design and fabrication of universal resolution targets for m...

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Three-Dimensional and Multidimensional Microscopy: Image Acquisition and Processing XXXI 2024

作者： Abbasian, Vahid Awan, Kashif Masud Darafsheh, Arash Department of Radiation Oncology Washington University School of Medicine in St. Louis St. LouisMO63110 United States Imaging Science Program McKelvey School of Engineering Washington University in St. Louis St. LouisMO63130 United States Institute of Materials Science and Engineering Washington University St. LouisMO63130 United States Department of Mechanical Engineering and Materials Science Washington University in St. Louis St. LouisMO63130 United States

ISBN: (纸本)9781510669550

Determining the achieved spatial resolution in microsphere-assisted microscopy (MAM) has remained an important and challenging task. While fluorescent-based microscopies use fluorescent nano-beads to determine the point spread function (PSF), such a method is not practical in label-free super-resolution techniques. In some previous studies, objects with certain features have been imaged and those feature sizes have been reported as the resolution;however, determining the resolution in that way is not consistent with the definition of resolution based on point sources. Furthermore, the imaging characteristics in MAM may depend on specimen-specific properties, such as materials and substrate. In this study, we propose a robust and objective technique to address these issues. We fabricate arrays of nano-pillars varying in diameter and periodicity, ranging from 50 to 1000 nm. These pillars consist of a 20 nm Ag layer with a 2 nm Cr adhesion layer, deposited on a silicon substrate. The role of specimen-specific properties can be investigated by considering different materials. Fabrication involves the bilayer PMMA resist lift-off process, ensuring accurate deposition of nanometer-scale features to serve as sub-diffraction-limited targets in optical super-resolution microscopy. A deconvolution method that provides a robust platform for resolution measurement was used. By deconvolving the object profile, obtained from scanning electron microscopy, from the image profile, the PSF of the system is determined. Our proposed technique offers a reliable and standardized approach for quantifying resolution, magnification, and field-of-view in MAM or any other label-free microscopy technique, enabling accurate and objective comparison across different novel microscopy techniques. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Microspheres

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New insights into the hardening and pitting corrosion mechanisms of thermally aged duplex stainless steel at 475℃:A comparative study between 2205 and 2101 steels

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Journal of materials science & Technology 2022年第3期98卷 123-135页

作者： R.Silva G.S.Vacchi C.L.Kugelmeier I.G.R.Santos A.A.Mendes Filho D.C.C.Magalhães C.R.M.Afonso V.L.Sordi C.A.D.Rovere Munir Rachid Corrosion Laboratory Department of Materials EngineeringFederal University of São CarlosRodovia Washington Luis Km 23513565-905 São CarlosSPBrazil Engineering Modeling and Applied Social Sciences Center(CECS)Federal University of ABCAvenida dos Estados 500109210580 Santo AndréSPBrazil Federal University of São Carlos Graduate Program in Materials Science and EngineeringBrazil

In this study,the relationship between spinodal decomposition and the formation of Ni-rich clusters and G-phase in the ferrite on hardening and pitting corrosion of two thermally aged duplex stainless steels(DSSs)at 475℃was *** indicate that,for 2205 DSS,pitting corrosion behavior is influenced by the presence and size of G-phase precipitates for longer aging times,but this contribution is masked by the advanced stage of spinodal decomposition in the ferritic *** the other hand,for 2101 DSS,the formation of Cr-richer nitrides impairs pitting corrosion resistance more than spinodal decomposition.

关键词： Duplex stainless steel Spinodal decomposition G-phase precipitation Pitting corrosion Hardening

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Carbon capture and storage(CCS):development path based on carbon neutrality and economic policy

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Carbon Neutrality 2022年第1期1卷 71-91页

作者： Minghai Shen Fulin Kong Lige Tong Yang Luo Shaowu Yin Chuanping Liu Peikun Zhang Li Wang Paul K.Chu Yulong Ding School of Energy and Environmental Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Laboratory of Energy Saving and Emission Reduction for Metallurgical Industry University of Science and Technology BeijingBeijing 100083China Department of Physics Department of Materials Science and EngineeringDepartment of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina Department of Materials ETH ZurichVladimir‑Prelog‑Weg 58093 ZurichSwitzerland Birmingham Centre for Energy Storage and School of Chemical Engineering University of BirminghamBirmingham B152TTUK.

In order to limit global warming to 2°C,countries have adopted carbon capture and storage(CCS)technologies to reduce greenhouse gas ***,it is currently facing challenges such as controversial investment costs,unclear policies,and reduction of new energy power generation *** particular,some CCS projects are at a *** promote the development of CCS projects in different countries,this paper reviews and compares energy conservation and emission reduction policies and different national *** a policy perspective,CCS-driven policies are *** on this,corresponding policy recommendations are put forward,in order to promote the healthy development of global CCS technology and deal with climate issues more *** less than 10 years away from the short-term goal,promoting the development and application of CCS projects requires scientific research from universities,enterprises and governments in order to attain zero or negative CO_(2)*** the basis of focusing on the development of CCS technology,according to the actual situation of each country,the appropriate application of CCS engineering should focus on the development of science and technology,rather than a unified requirement around the world.

关键词： CCS Carbon neutralility Government policies Emission target

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Investigation of the significance of the plaque morphology evolution in plaque rupture events using computational biomechanics 46

Investigation of the significance of the plaque morphology e...

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46th Annual International Conference of the IEEE engineering in Medicine and Biology Society, EMBC 2024

作者： Pleouras, Dimitrios S. Siogkas, Panagiotis K. Potsika, Vassiliki T. Tsakanikas, Vasilis D. Dimos, Sokratis S. Mantzaris, Michalis D. Koncar, Igor Fotiadis, Dimitrios I. University of Ioannina Unit of Medical Technology and Intelligent Information Systems Dept. of Materials Science and Engineering IoanninaGR45110 Greece University of Belgrade Faculty of Medicine Department of Vascular and Endovascular Surgery Belgrade Serbia University of Ioannina Unit of Medical Technology and Intelligent Information Systems Biomedical Research Institute Forth Dept. of Materials Science and Engineering IoanninaGR45110 Greece

ISBN: (纸本)9798350371499

Forwarded by the technological urge of this era, several computational methods are implemented to give further insights into possible outcomes of diseases. In this context, atherosclerosis, which is one of the most fatal diseases nowadays, is treated alike, where several computational models are proposed annually allowing for the evaluation of several outcomes for patient specific cases. Among them, one of the most significant models is able to predict the atherosclerotic evolution over time. In this proof-of-concept study, we aim to investigate the effect of plaque morphology on plaque rupture in a two-case scenario - a longitudinal and a bulk plaque evolution in 3D-reconstructed patient-specific carotids arteries. Our approach is based on a three-step process: i) the implementation of a state-of-the-art plaque growth model that predicts evolving and new plaques in real patient specific carotid arteries, ii) the selection of 2 patient cases, one with longitudinal plaque evolution and one with bulk plaque evolution and, finally, iii) the evaluation the maximum principal stress over the plaques and the endothelium layers to assess the plaque rupture risk. The results indicate that the evolving plaques towards the lumen, not only cause stenoses but also are more prone to rupture. Clinical relevance- This proof-of-concept work establishes that the plaques that grow towards the luminal border present with a higher risk of potential rupture compared to plaques that grow longitudinally, thus giving valuable insights to clinicians for important decision making regarding potential endarterectomy procedures. © 2024 IEEE.

关键词： 3D reconstruction

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Functional Peptide-Loaded Gelatin Nanoparticles as Eyedrops for Cornea Neovascularization Treatment

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International Journal of Nanomedicine 2023年 18卷 1413-1431页

作者： Chu, Ya-Chun Fang, Hsu-Wei Wu, Yu-Yi Tang, Yu-Jun Hsieh, Erh-Hsuan She, Yizhou Chang, Che-Yi Lin, I-Chan Chen, Yin-Ju Liu, Guei-Sheung Tseng, Ching-Li Graduate Institute of Biomedical Materials and Tissue Engineering College of Biomedical Engineering Taipei Medical University Taipei City Taiwan Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei City Taiwan Institute of Biomedical Engineering and Nanomedicine National Health Research Institutes Miaoli County Taiwan School of Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei City Taiwan Department of Ophthalmology Wan Fang Hospital Taipei Medical University Taipei City Taiwan Department of Ophthalmology School of Medicine College of Medicine Taipei Medical University Taipei City Taiwan Department of Radiation Oncology Taipei Medical University Hospital Taipei City Taiwan International Ph.D. Program in Biomedical Engineering College of Biomedical Engineering Taipei Medical University Taipei City Taiwan Center for Precision Medicine and Translational Cancer Research Taipei Medical University Hospital Taipei City Taiwan Centre for Eye Research Australia Royal Victorian Eye and Ear Hospital East Melbourne VIC Australia Ophthalmology Department of Surgery University of Melbourne East Melbourne VIC Australia Menzies Institute for Medical Research University of Tasmania Hobart TAS Australia Research Center of Biomedical Device College of Biomedical Engineering Taipei Medical University Taipei City Taiwan

Background: Corneal neovascularization (NV) is a process of abnormal vessel growth into the transparent cornea from the limbus and can disturb the light passing through the cornea, resulting in vision loss or even blindness. The use of nanomedicine as an effective therapeutic formulation in ophthalmology has led to higher drug bioavailability and a slow drug release rate. In this research, we designed and explored the feasibility of a new nanomedicine, gp91 ds-tat (gp91) peptide-encapsulated gelatin nanoparticles (GNP-gp91), for inhibiting corneal angiogenesis. Methods: GNP-gp91 were prepared by a two-step desolvation method. The characterization and cytocompatibility of GNP-gp91 were analyzed. The inhibition effect of GNP-gp91 on HUVEC cell migration and tube formation was observed by an inverted microscope. The drug retention test in mouse cornea was observed by in vivo imaging system, fluorescence microscope, and DAPI/TAMRA staining. Finally, the therapeutic efficacy and evaluation of neovascularization-related factors were conducted through the in vivo corneal NV mice model via topical delivery. Results: The prepared GNP-gp91 had a nano-scale diameter (550.6 nm) with positive charge (21.7 mV) slow-release behavior (25%, 240hr). In vitro test revealed that GNP-gp91 enhanced the inhibition of cell migration and tube formation capacity via higher internalization of HUVEC. Topical administration (eyedrops) of the GNP-gp91 significantly prolongs the retention time (46%, 20 min) in the mouse cornea. In chemically burned corneal neovascularization models, corneal vessel area with a significant reduction in GNP-gp91 group (7.89%) was revealed when compared with PBS (33.99%) and gp91 (19.67%) treated groups via every two days dosing. Moreover, GNP-gp91 significantly reduced the concentration of Nox2, VEGF and MMP9 in NV’s cornea. Conclusion: The nanomedicine, GNP-gp91, was successfully synthesized for ophthalmological application. These data suggest that GNP-gp91 contain

关键词： control release corneal neovascularization eye drops gelatin gp91 peptide nanoparticles ocular retention

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End-to-End Reaction Field Energy Modeling via Deep Learning based Voxel-to-voxel Transform

arXiv

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arXiv 2024年

作者： Wu, Yongxian Zhu, Qiang Luo, Ray Department of Chemical and Biomolecular Engineering Molecular Biology and Biochemistry Materials Science and Engineering and Biomedical Engineering University of California Irvine IrvineCA92697 United States

In computational biochemistry and biophysics, understanding the role of electrostatic interactions is crucial for elucidating the structure, dynamics, and function of biomolecules. The Poisson-Boltzmann (PB) equation is a foundational tool for modeling these interactions by describing the electrostatic potential in and around charged molecules. However, solving the PB equation presents significant computational challenges due to the complexity of biomolecular surfaces and the need to account for mobile ions. While traditional numerical methods for solving the PB equation are accurate, they are computationally expensive and scale poorly with increasing system size. To address these challenges, we introduce PBNeF, a novel machine learning approach inspired by recent advancements in neural network-based partial differential equation solvers. Our method formulates the input and boundary electrostatic conditions of the PB equation into a learnable voxel representation, enabling the use of a neural field transformer to predict the PB solution and, subsequently, the reaction field potential energy. Extensive experiments demonstrate that PBNeF achieves over a 100-fold speedup compared to traditional PB solvers, while maintaining accuracy comparable to the Generalized Born (GB) model. Copyright © 2024, The Authors. All rights reserved.

关键词： Boltzmann equation

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