检索结果-内蒙古大学图书馆

engineering biomaterials by inkjet printing of hydrogels with functional particulates

Med-X 2024年第1期2卷 150-169页

作者： Cih Cheng Eric J Williamson George T.-C.Chiu Bumsoo Han School of Mechanical Engineering Purdue UniversityWest LafayetteINUSA Purdue Institute for Cancer Research Purdue UniversityWest LafayetteINUSA Department of Mechanical Science and Engineering Materials Research Laboratory and Cancer Center at IllinoisUniversity of Illinois Urbana-Champaign1206 W Green StUrbanaIL 61801USA

Hydrogels with particulates,including proteins,drugs,nanoparticles,and cells,enable the development of new and innovative *** control of the spatial distribution of these particulates is crucial to produce advanced ***,there is a high demand for manufacturing methods for particle-laden *** this context,3D printing of hydrogels is emerging as a promising method to create numerous innovative *** the 3D printing methods,inkjet printing,so-called drop-on-demand(DOD)printing,stands out for its ability to construct biomaterials with superior spatial ***,its printing processes are still designed by trial and error due to a limited understanding of the ink behavior during the printing *** review discusses the current understanding of transport processes and hydrogel behaviors during inkjet printing for particulate-laden ***,we review the transport processes of water and particulates within hydrogel during ink formulation,jetting,and ***,we examine current inkjet printing applications in fabricating engineered tissues,drug delivery devices,and advanced bioelectronics ***,the challenges and opportunities for next-generation inkjet printing are also discussed.

关键词： Drop-on-demand printing Water-matrix interaction Particle transport Tissue engineering Drug delivery device Bioelectronics

来源：评论

学校读者我要写书评

暂无评论

Enabling plastic co-deformation of disparate phases in a laser rapid solidified Sr-modified Al-Si eutectic through partial-dislocation-mediated-plasticity in Si

arXiv

引用

arXiv 2023年

作者： Ghosh, Arkajit Wu, Wenqian Sahu, Bibhu Prasad Wang, Jian Misra, Amit Department of Materials Science and Engineering University of Michigan Ann ArborMI48109 United States Department of Mechanical and Materials Engineering University of Nebraska LincolnNE68588 United States Department of Mechanical Engineering University of Michigan Ann ArborMI48109 United States

Nano-scale eutectics, such as rapid solidified Al-Si, exhibit enhanced yield strength and strain hardening but plasticity is limited by cracking of the hard phase (Si). Mechanisms that may suppress cracking and enable plastic co-deformation of soft and hard phases are key to maximizing plasticity in these high-strength microstructures. Using a combination of laser rapid solidification and chemical (Sr) modification, we have synthesized fully eutectic Al-Si microstructures with heavily twinned Si nano-fibers that exhibit high hardness up to 2.9 GPa, and high compressive flow strength (~840 MPa) with stable plastic flow to ~26% plastic strain. After deformation, the hard Si(Sr) fibers did not exhibit cracks, but a high density of stacking faults were observed in the Si(Sr) fibers suggesting partial dislocation mediated plasticity. Mechanisms for suppression of cracking and activation of partial dislocations in Si deformed at room temperature are discussed in terms of nanoscale fiber geometry with reduced aspect ratio and lowering of the Peierls barrier in chemically-modified, nano-twinned Si fibers. Copyright © 2023, The Authors. All rights reserved.

关键词： Ductile fracture

来源：评论

学校读者我要写书评

暂无评论

In Situ Constructing Heterogeneous Mn(Vo3)2/Navo3 Nanoribbons as High-Performance Cathodes for Aqueous Zinc-Ion Batteries

SSRN

引用

SSRN 2023年

作者： Lu, Jie Du, Huiling Liu, Huan Cao, Na Li, Zhuo Cao, Bin College of Mechanical Engineering Xi’an University of Science and Technology Xi’an710054 China College of Materials Science and Engineering Xi’an University of Science and Technology Xi’an710054 China College of Safety Science and Engineering Xi’an University of Science and Technology Xi’an710054 China

Aqueous zinc-ion batteries (AZIBs) are emerging as a promising candidate, enjoying accolades for their safety, low cost, and ease of operation. However, some challenges like the slow kinetics and structural collapse of cathode materials hamper their rate capability and cyclability. To address these limitations, a heterogeneous Mn(VO3)2/NaVO3 (MNVO) nanoribbon hybrid was designed as high-performance cathodes for zinc storage. Owing to the heterointerface between Mn(VO3)2 and NaVO3 boosting the charge-transfer kinetics and leading to enhanced zinc diffusion kinetics, the MNVO exhibits a high specific capacity of 381.2 mAh g-1 at 0.2 A g-1, high rate capability (286.7 mAh g-1 at 5 A g-1), and excellent electrochemical kinetics. Additionally, the MNVO cathode exhibits stable cyclability (a high-capacity retention rate of 95.7 % at 1 A g-1 after 200 cycles) and excellent long-term cyclability (a high-capacity retention of 83.0 % after 2000 cycles). Moreover, the zinc storage mechanism of co-intercalation of Zn2+ and H2O into the host of MNVO were investigated by ex situ XRD and XPS characterizations. Our work offers new insight and understanding into the development of high-performance cathode materials through constructing heterogeneous structure. © 2023, The Authors. All rights reserved.

关键词： Cathodes

来源：评论

学校读者我要写书评

暂无评论

MXenes as catalysts for lightweight hydrogen storage materials: A review

Materials Today Catalysis

引用

materials Today Catalysis 2024年 7卷

作者： Deng, Jiayi Li, Yun Ning, Hua Qing, Peilin Huang, Xiantun Luo, Hui Zhang, Liang Li, Guangxu Huang, Cunke Lan, Zhiqiang Zhou, Wenzheng Guo, Jin Wang, Xinhua Liu, Haizhen Guangxi Novel Battery Materials Research Center of Engineering Technology School of Physical Science and Technology Guangxi University Nanning530004 China School of Mechanical and Electrical Engineering Quzhou College of Technology Quzhou324000 China College of Mathematics and Physics Guangxi Minzu University Nanning530006 China Guangxi Key Laboratory of Green Manufacturing for Ecological Aluminum Industry & Engineering Research Center of Advanced Aluminium Matrix Materials of Guangxi Province Department of Materials Science and Engineering Baise University Baise533000 China State Key Laboratory of Silicon and Advanced Semiconductor Materials School of Materials Science & Engineering Zhejiang University Hangzhou310027 China Guangxi Key Laboratory of Electrochemical Energy Materials Nanning530004 China Nankai University Tianjin300071 China

Hydrogen can serve as a clean storage medium for large-scale renewable energy due to its characteristics of cleanness, high gravimetric energy density, abundant resources, and flexible applications. However, storing hydrogen in a manner both compactly and safely is still a thorny issue currently. Hydrogen storage in materials provides a feasible solution for such tough issue. Unfortunately, most of the light-weight hydrogen storage materials such as complex metal hydrides (LiBH4, Mg(BH4)2, LiAlH4, NaAlH4, etc.), binary light-weight metal hydrides (MgH2, AlH3, etc.) are currently facing the problems of high thermal stability, slow desorption and absorption kinetics, or poor reversibility. Introduction of catalysts or constructing nanostructures are two of the feasible methods that can efficiently tailor the hydrogen storage properties of the materials. Recently two-dimensional (2D) transition metal carbides, nitrides, or carbonitrides (called MXenes) have shown great development potential as catalysts to regulate the performances of hydrogen storage materials due to their unique electronic properties, layered structures and catalytic activity of the transition metals contained. It is possible to simultaneously nanoconfine and catalyze the hydrogen storage materials by layered MXenes. In this review, the synthesis methods and application situation of MXenes are first briefly introduced. Then, the emphasis is placed on the research progress and recent advances of MXenes as catalysts for regulating the hydrogen storage properties of light materials such as MgH2, AlH3, LiAlH4, NaAlH4, LiBH4, Mg(BH4)2 or multicomponent hydrogen storage composites such as LiBH4−MgH2, MgH2−LiAlH4, LiBH4−Mg(BH4)2, etc. This review demonstrates that MXenes have exhibited very good catalytic activity on the dehydrogenation and rehydrogenation of various hydrogen storage materials. Since there is barely review focused on the various kinds of hydrogen storage materials, this review will close th

关键词： Dehydrogenation

来源：评论

学校读者我要写书评

暂无评论

On-Chip Unidirectional Waveguiding for Surface Acoustic Waves along a Defect Line in a Triangular Lattice

引用

Physical Review Applied 2023年第2期19卷 024053-024053页

作者： Yun Zhou Naiqing Zhang Dia’aaldin J. Bisharat Robert J. Davis Zichen Zhang James Friend Prabhakar R. Bandaru Daniel F. Sievenpiper Department of Mechanical Engineering University of California San Diego La Jolla 92093-0411 California USA Department of Electrical Engineering University of California San Diego La Jolla 92093-0411 California USA Program in Materials Science University of California San Diego La Jolla 92093-0411 California USA

The latest advances in topological physics have yielded a toolset for highly robust wave-propagation modalities for overcoming obstacles involving beam steering and lateral diffraction in surface acoustic waves (SAWs). However, extant proposals are limited to the exploitation of spin- or valley-polarized phases and rely on nonzero Berry curvature effects. Here, we propose and experimentally demonstrate a highly robust guiding principle, which instead employs an intrinsic chirality of phase vortices and maintains a zero Berry curvature for SAWs. Based on a line defect within a true triangular phononic lattice, the guided SAW mode spans a wide bandwidth [(Δω/ωcenter) ∼ 10%] and is well confined in the lateral direction with 3-dB attenuation within half of a unit cell. SAW routing around sharp bends with negligible backscatter is demonstrated. The on-chip integrated design permits unidirectional SAW modes that can enable considerable miniaturization of SAW-based devices, with applications ranging from radio-frequency devices to quantum information transduction.

关键词： Line defects Ultrasonics Acoustic metamaterials Phononic crystals Topological insulators Triangular lattice Waveguides Surface acoustic wave

来源：评论

学校读者我要写书评

暂无评论

Fully implantable and battery-free wireless optoelectronic system for modulable cancer therapy and real-time monitoring

引用

npj Flexible Electronics 2023年第1期7卷 119-130页

作者： Kiho Kim In Sik Min Tae Hee Kim Do Hyeon Kim Seungwon Hwang Kyowon Kang Kyubeen Kim Sangun Park Jongmin Lee Young Uk Cho Jung Woo Lee Woon-Hong Yeo Young Min Song Youngmee Jung Ki Jun Yu Functional Bio-integrated Electronics and Energy Management Lab School of Electrical and Electronic EngineeringYonsei University50 Yonsei-roSeodaemun-guSeoul 03722Republic of Korea Center for Biomaterials Biomedical Research InstituteKorea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea Department of Fusion Research and Collaboration Biomedical Research InstituteSeoul National University HospitalSeoul 03080Republic of Korea School of Electrical Engineering and Computer Science(EECS) Gwangju Institute of Science and Technology(GIST)Gwangju 61005Republic of Korea PA1 Foundry BusinessSamsung Electronics1 Samsungjeonja-roHwaseong-siGyeonggi-doRepublic of Korea R&D Center DNA Lab PharmaresearchSeongnam 13486Republic of Korea KU-KIST Graduate School of Converging Science and Technology Korea UniversitySeoul 136-705Republic of Korea School of Materials Science and Engineering Energy Materials for Soft Electronics LaboratoryPusan National UniversityBusan 46241Republic of Korea IEN Center for Human-Centric Interfaces and Engineering and George W.Woodruff School of Mechanical Engineering Georgia Institute of TechnologyAtlantaGA 30332USA Wallace H.Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University School of MedicineAtlantaGA 30332USA Institute for Robotics and Intelligent Machines Parker H.Petit Institute for Bioengineering and BiosciencesInstitute for MaterialsNeural Engineering CenterGeorgia Institute of TechnologyAtlantaGA 30332USA School of Electrical and Electronic Engineering YU-Korea Institute of Science and Technology(KIST)InstituteYonsei University50Yonsei-roSeodaemun-guSeoul 03722Republic of Korea

Photodynamic therapy(PDT)is attracting attention as a next-generation cancer treatment that can selectively destroy malignant tissues,exhibit fewer side effects,and lack pain during *** PDT systems have recently been developed to resolve the issues of bulky and expensive conventional PDT systems and to implement continuous and repetitive *** implantable PDT systems,however,are not able to perform multiple functions simultaneously,such as modulating light intensity,measuring,and transmitting tumor-related data,resulting in the complexity of cancer ***,we introduce a flexible and fully implantable wireless optoelectronic system capable of continuous and effective cancer treatment by fusing PDT and hyperthermia and enabling tumor size monitoring in *** system exploits micro inorganic light-emitting diodes(μ-LED)that emit light with a wavelength of 624 nm,designed not to affect surrounding normal tissues by utilizing a fully programmable light intensity ofμ-LED and precisely monitoring the tumor size by Si phototransistor during a long-term implantation(2–3 weeks).The superiority of simultaneous cancer treatment and tumor size monitoring capabilities of our system operated by wireless power and data transmissions with a cell phone was confirmed through in vitro experiments,ray-tracing simulation results,and a tumor xenograft mouse model in *** all-in-one single system for cancer treatment offers opportunities to not only enable effective treatment of tumors located deep in the tissue but also enable precise and continuous monitoring of tumor size in real-time.

关键词： optoelectronic enable battery

来源：评论

学校读者我要写书评

暂无评论

Predicting the Heterogeneous Chemo-Mechano-Biological Degeneration of Cartilage Using 3-D Biphasic Finite Elements

SSRN

引用

SSRN 2024年

作者： Rahman, Muhammed Masudur Watton, Paul N. Neu, Corey P. Pierce, David M. Department of Mechanical Engineering University of Connecticut Storrs CT United States Department of Computer Science Insigneo Institute for in silico Medicine University of Sheffield Sheffield United Kingdom Department of Mechanical Engineering and Materials Science University of Pittsburgh Pittsburgh United States Paul M. Rady Department of Mechanical Engineering University of Colorado BoulderCO United States Biomedical Engineering Program University of Colorado BoulderCO United States BioFrontiers Institute University of Colorado BoulderCO United States Department of Biomedical Engineering University of Connecticut Storrs CT United States

We establish a novel chemo-mechano-biological (CMB) modeling framework for cartilage implemented within 3-D nonlinear, finite element analyses. The framework integrates a nonlinear biphasic constitutive model with a signaling-pathways biochemical model to capture the coupled effects of mechanical stimuli, biochemical factors, and cellular activity on cartilage degeneration and remodeling. Through finite element simulations of cyclic compression, we explored cartilage degeneration similar to early-stage osteoarthritis (OA), demonstrating that oxygen-dependent, depth-specific metabolic activity yields more realistic patterns of degeneration compared to our previous models. Specifically, our results align with experimental observations, capturing depth-dependent cartilage degradation most pronounced in the superficial zone. Incorporating these insights, our framework provides a platform to investigate mechanisms of cartilage degeneration and simulate therapeutic interventions. We previously developed automated and publicly available tools to generate patient-specific knee models from MR Images, altogether enabling personalized diagnostics/prognostics and pre-/post-operative planning. Our CMB framework is also publicly available for academic use at https://***/imLab/FEVGnR-Plugin, offering a robust basis for advancing research and clinical strategies in understanding and managing osteoarthritis. © 2024, The Authors. All rights reserved.

关键词： Cartilage

来源：评论

学校读者我要写书评

暂无评论

Upcycling of Disposed Photovoltaic Backsheet to Microcellular Thermal-Insulation Material Through Supercritical Co2 Foaming

SSRN

引用

SSRN 2024年

作者： Lu, Miao Jia, Jiyun Gao, Quan Xia, Mingxu Li, Jin Park, Chul B. Zhang, Ruiyan Ningxia Key Laboratory of Photovoltaic Materials School of Materials and New Energy Ningxia University Yinchuan750021 China Department of Mechanical and Industrial Engineering University of Toronto TorontoM5S 3G8 Canada School of Materials Science and Engineering

Upcycling of disposed photovoltaic backsheets plays important role in sustainable development of the photovoltaic industrial chain. However, since the melt strength of the main component (rPET) decreased dramatically after long-term outside exposure, it is still challenging to develop a microcellular thermal-insulation foam. Herein, we utilize a crystalline-amorphous network (CAN) strategy to enhance rPET melt strength and develop microcellular thermal-insulation material via supercritical CO2 (Sc-CO2) foaming technology. The tunable CAN fractions can be achieved by manipulation of crystallinity and rigid amorphous fraction (RAF) via annealing process. The crystallinity was increased to 31.9% for the sample annealed at the temperature of 115 oC, while the RAF value rose to 44.6%. Consequently, the zero-shear complex viscosity of rPET samples increased from 164.2 Pa·s to 1826.6 Pa·s with increased CAN fractions up to 76.5%, demonstrating a typical shear-thinning behavior. Combined with the Sc-CO2 foaming technology, the void fraction can be tuned from 31.6% to 83.5%. The cell density was optimized, reaching a high value of 1.12×109 cells/cc with the CAN fraction of 21.5%. Furthermore, the thermal conductivity decreased from 254 mW/m·K for a solid rPET sample to 47.3 mW/m·K for thermal-insulation rPET foam. As a proof of concept, this work provides a novel route for resource utilization of disposed photovoltaic backsheet. © 2024, The Authors. All rights reserved.

关键词： Thermal insulation

来源：评论

学校读者我要写书评

暂无评论

Polarization switching in ferroelectric HfO2 from first-principles lattice mode analysis

引用

Physical Review B 2025年第13期111卷 134106-134106页

作者： Yubo Qi Sobhit Singh Karin M. Rabe Department of Physics University of Alabama at Birmingham Birmingham Alabama 35294 USA Department of Mechanical Engineering University of Rochester Rochester New York 14627 USA Materials Science Program University of Rochester Rochester New York 14627 USA Department of Physics and Astronomy Rutgers University Piscataway New Jersey 08854 USA

In this paper, we introduce a first-principles-based lattice mode analysis method to investigate the competition between different polarization switching paths in HfO2. Because the stability of the polar orthorhombic Pca21 phase of HfO2 arises from a trilinear coupling, polarization switching requires the flipping of not only the polar Γ15Z mode, but also at least one zone-boundary antipolar mode. This means that each polarization state has multiple variants, leading to multiple possible switching paths connecting up- and down-polarized states, which can be systemically enumerated within this framework for efficient identification of the optimal switching path. Our lattice mode analysis also explains why the activation energy of propagation of the most widely studied domain-wall structure in HfO2, which requires the reversal of the X2− mode, is much larger than that of propagation of domain-wall structures with a uniform sign for the X2− mode. This approach deepens our understanding of distinctive properties of ferroelectric HfO2 related to polarization switching and domain-wall motion, including sluggish domain-wall motion, robust ferroelectricity in thin films, and the observation that the antipolar Pbca phase can hardly be transformed to the ferroelectric Pca21 phase by an electric field. Our mode analysis method can be more generally applied to any improper or hybrid improper ferroelectric, in which polarization switching requires changes of nonpolar distortions, for systematic and efficient prediction of optimal switching paths and estimation of coercive fields.

关键词： Ferroelectricity

来源：评论

学校读者我要写书评

暂无评论

Innovation for forming aluminum alloy thin shells at ultra-low temperature by the dual enhancement effect

引用

International Journal of Extreme Manufacturing 2022年第3期4卷 99-103页

作者： Fan Xiaobo Yuan Shijian School of Mechanical Engineering Dalian University of TechnologyDalianPeople’s Republic of China School of Materials Science and Engineering Harbin Institute of TechnologyHarbinPeople’s Republic of China

Integral thin shells made of high strength aluminum alloys are urgently needed in new generation transportation equipment. There are challenges to overcoming the co-existing problems of wrinkling and splitting by the cold forming and hot forming processes. An innovative technology of ultra-low temperature forming has been invented for aluminum alloy thin shells by the new phenomenon of ‘dual enhancement effect’. That means plasticity and hardening are enhanced simultaneously at ultra-low temperatures. In this perspective, the dual enhancement effect is described, and the development, current state and prospects of this new forming method are introduced. This innovative method can provide a new approach for integral aluminum alloy components with large size, ultra-thin thickness, and high strength. An integral tank dome of rocket with 2 m in diameter was formed by using a blank sheet with the same thickness as the final component, breaking through the limit value of thickness-diameter ratio.

关键词： aluminum alloy thin shell ultra-low temperature forming dual enhancement effect

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：