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Microstructure Evolution and Growth Kinetics of Cu6sn5 Intermetallic Compound at Liquid-Solid Interfaces in Cu/Sn/Cu Interconnects Under Ultrasonic Waves

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SSRN 2024年

作者： Niu, Hongwei Bian, Hong Wang, Jian Song, Xiaoguo Zhao, Hongyun School of Materials Engineering Jiangsu University of Technology Changzhou213001 China State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin150001 China Shandong Provincial Key Laboratory of Special Welding Technology Harbin Institute of Technology at Weihai Weihai264209 China

The microstructure evolution and growth kinetics of Cu6Sn5 intermetallic compound (IMC) in a Cu/Sn/Cu interconnection structure during the ultrasonic-assisted transient liquid phase (TLP) soldering process were investigated. Being different from the symmetrical growth during isothermal aging without ultrasonic waves (USW), highly asymmetrical growth of Cu6Sn5 at the upper and lower Sn/Cu interfaces was observed with USW. Cu6Sn5 grains exhibited scallop-type morphology, and were discrete at the upper interface;while that at the lower Sn/Cu interface exhibited column-type morphology, and were conterminous at the lower interface. USW caused the mass migration of Cu atoms from the upper Cu surface toward the lower interface, resulting in sufficient Cu atomic ﬂux for the fast formation of Cu6Sn5 at the lower interface, and many cavitation pits on the upper Cu surface. A growth model was established to explain the growth kinetics of the Cu6Sn5 IMC, indicating a reaction-controlled growth mechanism. © 2024, The Authors. All rights reserved.

关键词： Growth kinetics

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Deep-red and near-infrared organic lasers based on centrosymmetric molecules with excited-state intramolecular double proton transfer activity

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Opto-Electronic Advances 2023年第7期6卷 19-28页

作者： Chang-Cun Yan Zong-Lu Che Wan-Ying Yang Xue-Dong Wang Liang-Sheng Liao Macao Institute of Materials Science and Engineering Macao University of Science and TechnologyTaipaMacao SAR 999078China Institute of Functional Nano&Soft Materials Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesJoint International Research Laboratory of Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China Jiangsu Engineering Laboratory of Novel Functional Polymeric Materials Jiangsu Key Laboratory of Advanced Negative Carbon TechnologiesCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China.

Organic lasers that emit light in the deep-red and near-infrared(NIR)region are of essential importance in laser communication,night vision,bioimaging,and information-secured displays but are still challenging because of the lack of proper gain ***,a new molecular design strategy that operates by merging two excited-state intramolecular proton transfer-active molecules into one excited-state double proton transfer(ESDPT)-active molecule was *** on this new strategy,three new materials were designed and synthesized with two groups of intramolecular resonance-assisted hydrogen bonds,in which the ESDPT process was proven to proceed smoothly based on theoretical calculations and experimental results of steady-state and transient *** from the effective six-level system constructed by the ESDPT process,all newly designed materials showed low threshold laser emissions at approximately 720 nm when doped in PS microspheres,which in turn proved the existence of the second proton transfer *** importantly,our well-developed NIR organic lasers showed high laser stability,which can maintain high laser intensity after 12000 pulse lasing,which is essential in practical *** work provides a simple and effective method for the development of NIR organic gain materials and demonstrates the ESDPT mechanism for NIR lasing.

关键词： excited-state intramolecular proton transfer organic laser near-infrared emission molecular design

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Phosphorus-doping and oxygen vacancy endowing anatase TiO_(2) with excellent sodium storage performance

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Rare Metals 2022年第4期41卷 1284-1293页

作者： Hong-Shun Zhao Yan-Li Qi Kang Liang Wei-Kai Zhu Hao-Bin Wu Jian-Bin Li Yu-Rong Ren School of Materials Science and Engineering Changzhou UniversityChangzhou 213164China Changzhou Key Laboratory of Intelligent Manufacturing and Advanced Technology for Power Battery Changzhou 213164China Jiangsu Province Engineering Research Center of Intelligent Manufacturing Technology for the New Energy Vehicle Power Battery Changzhou 213164China Institute for Composites Science Innovation(InCSI) School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China

Titanium dioxide is considered to be promising anode for sodium-ion batteries due to stable structure during the charge/discharge ***,its practical application is hindered by the slow electron/ion ***,phosphorus-doped anatase TiO_(2) nanoparticles with oxygen vacancies are successfully synthesized and utilized as high-performance sodium-storage *** dual strategy of phosphorus-doping and oxygen vacancies can concurrently boost electronic conductivity and adjust ion diffusion *** significantly contribute to the improved rate performance(167 mAh·g^(-1) at 20.0C)and stable cycling(95.9%after 2000 cycles at 20.0C).The proposed dual strategy can be potentially used to improve other oxide anodes for rechargeable batteries.

关键词： Titanium dioxide Phosphorus doping Oxygen vacancy Anode Sodium-ion batteries

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Correction to: Constitutive Model and Hot Workability of 022Cr19Ni10 Nuclear-Grade Austenitic Stainless Steel (Journal of Materials Engineering and Performance, (2025), 10.1007/s11665-025-10934-y)

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Journal of Materials Engineering and Performance 2025年 1-1页

作者： Jiang, Changchun Pan, Xujie Ma, Mingjuan Wang, Liqiang Qian, Jing School of Mechanical Engineering Jiangnan University Jiangsu214122 China Wuxi Flange Forging Co. Ltd Jiangsu214156 China Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology School of Mechanical Engineering Jiangnan University Jiangsu214122 China

The name of corresponding author Jing Qian was misspelled in the article as originally published. The original article has been corrected © ASM International 2025.

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Rapidly-Constructed Material-Extrusion 3d Printing Platform with a Low Cost for Conformal Sensor Array Printing on Non-Developable Curved Surfaces

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SSRN 2024年

作者： Yu, Peishi Yao, Qin Zhao, Yuxiang Li, Maoyang Zhang, Xin Tao, Yin Zhao, Junhua Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology School of Mechanical Engineering Jiangnan University Wuxi214122 China Jiangsu Province Engineering Research Center of Micro-Nano Additive and Subtractive Manufacturing Institute of Advanced Technology Jiangnan University Wuxi214122 China

The conformal assembly of sensor arrays on curved surfaces is highly desired in the structural health monitoring of critical 3D components. However, transfer printing to attach sensors on an object surface makes it difficult to deploy sensors in specific locations with desired orientations and high precision. In this work, we inherited the open-sourced Open5x motion strategy, constructed a linkage and synchronously controlled the driving air pressure with trajectory-guided motion. Thus, we achieved a paste material-extrusion platform for a conformal printing sensor array on a non-developable curved surface. A direct conformal trajectory planning was proposed based on meshing-discretization for the curved surfaces, avoiding the trajectory distortion and twisting induced by the existing two-step strategy from a 2D pattern to a 3D surface projection. Furthermore, a real-time interpolative correction algorithm was developed to optimize the motion trajectory and bridge the gap between the contour profile of the physical component and the imported 3D digital model, thus, enhancing the printing conformability. Specifically, we rapidly constructed the paste material-extrusion platform by assembling polylactic-acid-fusion printed components at a cost reduction of 95%. The printing trajectory error was less than 10 µm due to the correction algorithm, and even the components were fabricated with low accuracy. Finally, pre-designed sensor arrays were conformally printed on typical curved surfaces and strains at different positions were successfully detected. This work offers insight into conformal sensor printing on non-developable curved surfaces with high precision at a drastic cost reduction. © 2024, The Authors. All rights reserved.

关键词： Extrusion

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Mechanical And Tribocorrosion Performance Evaluation Of AISI 316L Stainless Steel Prepared by Digital Light Processing 3D Printing

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SSRN 2025年

作者： Bian, Da Wang, Junnai Guo, Jie Cao, Xinjian Qian, Shanhua Yang, Jun Liu, Weimin School of Mechanical Engineering Jiangnan University Wuxi214100 China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou730000 China Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai Yantai264006 China Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology Jiangnan University Jiangsu Wuxi214100 China

Digital light processing (DLP) is widely used in ceramic additive manufacturing, but it is difficult to form metal materials, and related research is in the infancy. On the one hand, metal slurries are difficult to cure under ultraviolet light. On the other hand, the mechanical properties and functionalities of metal materials after debinding and sintering require precise process regulation to ensure. In this paper, the geometric accuracy, mechanical and tribocorrosion properties of AISI 316L prepared by DLP (DLP-316L) are systematically evaluated. The dimensional error of the formed part can be controlled within ± 70 μm, and the surface roughness on the exposure plane is only 1.6 μm. The relative density of DLP-316L is 95.9 %, and its microstructure includes austenite and a small amount of M7C3-type carbides at grain boundaries. It not only has a high ultimate tensile strength of 543.5 ± 2.5 MPa, but more importantly, the fracture elongation can reach 58.73 ± 2.55 %, which is at a high level in the preparation of AISI 316L using DLP. In addition, the tribocorrosion performance of DLP-316L in 3.5 wt. % NaCl solution is better than that of the commercial rolled AISI 316L (R-316L). This is mainly attributed to the presence of a small amount of high-hardness M7C3 in the microstructure, which improves the wear and corrosion resistance of the material. © 2025, The Authors. All rights reserved.

关键词： Tensile strength

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Magnetic dynamics of two-dimensional itinerant ferromagnet Fe_(3)GeTe_(2)

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Chinese Physics B 2021年第9期30卷 506-512页

作者： Lijun Ni Zhendong Chen Wei Li Xianyang Lu Yu Yan Longlong Zhang Chunjie Yan Yang Chen Yaoyu Gu Yao Li Rong Zhang Ya Zhai Ronghua Liu Yi Yang Yongbing Xu Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials School of Electronic Science and EngineeringNanjing UniversityNanjing 210093China Jiangsu Provincial Key Laboratory for Nanotechnology School of PhysicsNanjing UniversityNanjing 210093China Department of Physics Southeast UniversityNanjing 211189China York-Nanjing Joint Centre for Spintronics and NanoEngineering Department of Electronic EngineeringUniversity of YorkYork YO105DDUnited Kingdom Jiangsu Key Laboratory of Opto-Electronic Technology Center for Quantum Transport and Thermal Energy ScienceSchool of Physics and TechnologyNanjing Normal UniversityNanjing 210023China

Among the layered two-dimensional ferromagnetic materials(2D FMs),due to a relatively high T_(C),the van der Waals(vdW)Fe_(3)GeTe_(2)(FGT)crystal is of great importance for investigating its distinct magnetic ***,we have carried out static and dynamic magnetization measurements of the FGT crystal with a Curie temperature TC≈204 *** M-H hysteresis loops with in-plane and out-of-plane orientations show that FGT has a strong perpendicular magnetic anisotropy with the easy axis along its ***,we have calculated the uniaxial magnetic anisotropy constant(K_(1))from the SQUID *** dynamic magnetic properties of FGT have been probed by utilizing the high sensitivity electron-spin-resonance(ESR)spectrometer at cryogenic *** on an approximation of single magnetic domain mode,the K_(1)and the effective damping constant(αeff)have also been determined from the out-of-plane angular dependence of ferromagnetic resonance(FMR)spectra obtained at the temperature range of 185 K to T_(C).We have found large magnetic damping with the effective damping constantαeff~0.58 along with a broad linewidth(ΔH_(pp)>1000 Oe at 9.48 GHz,H||c-axis).Our results provide useful dynamics information for the development of FGT-based spintronic devices.

关键词： two-dimensional ferromagnet ferromagnetic resonance magnetic anisotropy magnetic damping

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Mitochondrial flashes are interlinked with adaptive thermogenesis in brown adipocytes

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hLife 2024年第4期2卷 179-188页

作者： Xinyu Chen Huwatibieke Bahetiyaer Xuejiao Song Zuzhi Jiang Wenfeng Qi Weizheng Gao Lin Zhang Jue Zhang Heping Cheng Xianhua Wang State Key Laboratory of Membrane Biology Institute of Molecular MedicineCollege of Future TechnologyPeking UniversityBeijingChina Academy for Advanced Interdisciplinary Studies Peking UniversityBeijingChina College of Engineering Peking UniversityBeijingChina Research Unit of Mitochondria in Brain Diseases Chinese Academy of Medical SciencesPKU-Nanjing Institute of Translational MedicineJiangsuChina

Mitochondrial flash(mitoflash)is the electrochemical excitation of a single mitochondrion and plays diverse signaling roles in a variety of *** the viewpoint of bioenergetics,it represents the transient uncoupling of mitochondrial respiration from ATP *** adipose tissue(BAT)produces heat,primarily via mitochondrial uncoupled ***,we aim to illustrate the mitoflash activity in BAT *** show that BAT mitochondria undergo stochastic and intermittent mitoflashes at the levels of isolated mitochondria,cultured brown adipocytes,and even intact BAT.A BAT mitoflash contains multiple signals,including transient depolarization of mitochondrial membrane potential,transient matrix alkalization,and bursting production of reactive oxygen ***,thermogenic activation by b3-adrenergic stimulation dramatically augments mitoflash incidence,with mild effects on its unitary *** of the thermogenic uncoupling protein 1(UCP1)showed little effect on mitoflash biogenesis during heat ***,our results suggest that mitoflash might constitute an elemental signaling activity of mitochondria to regulate BAT thermogenesis.

关键词： mitochondrial flash(mitoflash) mitochondria thermogenesis brown adipocyte

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ILO-based Actuator and Sensor Faults Estimation for Nonlinear Discrete-time Systems

ILO-based Actuator and Sensor Faults Estimation for Nonlinea...

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Chinese Control and Decision Conference, CCDC

作者： Sheng Gao Wei Zhang Yuanzheng Tian Weiguo Kong Zhaoguang Wang State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Shenyang China Institutes for Robotics and Intelligent Manufacturing Chinese Academy of Sciences Shenyang China China-Portugal Belt and Road Joint Laboratory on Space & Sea Technology Advanced Research Shanghai China

ISBN: (数字)9798350387780

ISBN: (纸本)9798350387797

This paper addresses the multiple faults estimation problem of actuator and sensor faults with using iterative learning observer (ILO) for nonlinear discrete-time systems. First, an augmented descriptor system including system state and sensor fault vectors is constructed to achieve multiple faults estimation purpose. Then, a novel iterative learning observer is proposed, and the nonlinear estimation error is deduced into a more compact system by using a reformulated Lipschitz property. Next, design conditions of the observers are derived into the LMI optimization problem where a slack variable and L ∞ . performance index is introduced to reduce the conservativeness and obtain a more excellent performance of fault estimation. Finally, numerical simulations of an example of a single-link robot arm are provided to illustrate the effectiveness of the proposed method and multiple fault estimation scheme.

关键词： Discrete-time systems Actuators Simulation Estimation Observers Robot sensing systems Vectors

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Current AAV-mediated gene therapy in sensorineural hearing loss

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Fundamental Research 2025年第1期5卷 192-202页

作者： Jieyu Qi Xiaolong Fu Liyan Zhang Fangzhi Tan Nianci Li Qiuhan Sun Xiaojie Hu Zuhong He Ming Xia Renjie Chai State Key Laboratory of Digital Medical Engineering Department of Otolaryngology Head and Neck SurgeryZhongda HospitalSchool of Life Sciences and TechnologySchool of MedicineAdvanced Institute for Life and HealthJiangsu Province High-Tech Key Laboratory for Bio-Medical ResearchSoutheast UniversityNanjing 210096China Department of Neurology Aerospace Center HospitalSchool of Life ScienceBeijing Institute of TechnologyBeijing 100081China State Key Laboratory of Hearing and Balance Science Beijing Institute of TechnologyBeijing 100081China Advanced Technology Research Institute Beijing Institute of TechnologyJinan 250300China Department of Otorhinolaryngology-Head and Neck Surgery Zhongnan Hospital of Wuhan UniversityWuhan 430071China Department of Otolaryngology Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan 250021China Medical Science and Technology Innovation Center Shandong First Medical University&Shandong Academy of Medical SciencesJinan 250021China Co-Innovation Center of Neuroregeneration Nantong UniversityNantong 226001China Department of Otolaryngology Head and Neck Surgery Sichuan Provincial People's HospitalUniversity of Electronic Science and Technology of ChinaChengdu 610072China Southeast University Shenzhen Research Institute Shenzhen 518063China

The number of patients with hearing loss is on the rise due to congenital abnormalities,degenerative changes in old age,and acquired injuries such as virus or ototoxic drug-induced *** loss is a refractory and disabling disease that has serious negative effects on quality of *** pathology of hearing loss in the inner ear is characterized by varying degrees of damage to the cochlear sensory epithelium cells(such as hair cells and supporting cells),stria vascularis(including marginal,intermediate and basal cells)and spiral ganglion *** or direct repair of damaged cells in the inner ear is an effective way to treat sensorineural *** is currently possible to regenerate hair cells to treat sensorineural hearing loss by FX-322,a small molecule drug in clinical *** the development of genetic engineering technology,gene therapy has brought a promising treatment strategy for many previously intractable *** therapy has been regarded as a promising method in the treatment and rehabilitation of sensorineural hearing loss,and recombinant adeno-associated virus gene therapy has been widely used in fundamental research into hearing loss *** present,gene therapy for hearing loss is transitioning from feasibility studies to explorations of its safety and its therapeutic *** present article reviews the concepts,strategies,and applications of gene therapy mediated by recombinant adeno-associated viruses in the field of hearing loss treatment.

关键词： Hearing loss Cochlea Gene therapy Adeno-associated virus Auditory repair

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