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Science China Materials 2023年第11期66卷 4317-4325页

作者：梁华岳邹冀刘晶晶顾熠涵季伟王子涵王为民傅正义 Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration ZoneXiangyang 441000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China Jingdezhen Huaxun Special Ceramics Co. Ltd.Jingdezhen 333000China

导电陶瓷的物理性能由连续的导电基体所决定,调控困难.在这项研究中,通过在陶瓷基体中引入hBN薄片,成功实现了导电陶瓷力学和物理性能各向异性的调控.以包含TiN、Al、硼和hBN的混合粉末为原料,通过放电等离子烧结制备了两种hBN含量不同... 详细信息

导电陶瓷的物理性能由连续的导电基体所决定,调控困难.在这项研究中,通过在陶瓷基体中引入hBN薄片,成功实现了导电陶瓷力学和物理性能各向异性的调控.以包含TiN、Al、硼和hBN的混合粉末为原料,通过放电等离子烧结制备了两种hBN含量不同的导电TiB_(2)-AlNhBN陶瓷.在垂直于烧结压力的方向上,TiB_(2)-AlN-60vol%hBN陶瓷在室温下的弯曲强度、断裂韧性、电导率和热导率分别为151±6.34MPa、2.62±0.31MPam^(1/2)、5.3×10^(5)S m^(−1)和77.87Wm^(-1)K^(-1).而在平行于烧结压力的方向上,室温电导率和热导率分别降低到2.0×10^(5)S m^(−1)和32.25Wm^(-1)K^(-1).这些差异是通过在导电基体中加入少量额外排列的hBN薄片而产生的,为材料选择和设计提供了新的机会.

关键词： hexagonal boron nitride texture microstructure mechanical property physical property

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Erbium-Ytterbium Co-doped Tantalum Pentoxide as a Gain Material for Silicon-based Optoelectronics 16

Erbium-Ytterbium Co-doped Tantalum Pentoxide as a Gain Mater...

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16th Pacific Rim Conference on Lasers and Electro-Optics, CLEO-PR 2024

作者： He, Xiwen Zhang, Zheng Wang, Rongping Chen, Weibiao Zhou, Zhiping Qiguang Research and Innovation Center Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Aerospace Laser Technology and Systems Department Shanghai201800 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China Laboratory of Infrared Material and Devices Advanced Technology Research Institute Ningbo University Zhejiang Ningbo315211 China State Key Laboratory of Advanced Optical Communications Systems and Networks School of Electronics Peking: University Beijing100871 China

We demonstrate an Erbium-Ytterbium (Er-Yb) co-doped tantalum pentoxide (Ta2O5) gain material for integrated waveguide amplifiers and lasers. Luminescence properties of the film were characterized, and optical waveguid... 详细信息

ISBN: (纸本)9798350372076

关键词： Tantalum oxides

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Electrolyte engineering Toward High-Voltage Aqueous Energy Storage Devices

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Energy & Environmental Materials 2021年第3期4卷 302-306页

作者： Jianfeng Tan Jinping Liu School of Chemistry Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070China State Center for International Cooperation on Designer Low-carbon&Environmental Materials and School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China

Aqueous electrochemical energy storage(EES)devices are highly safe,environmentally benign,and inexpensive,but their operating voltage and energy density must be increased if they are to efficiently power multifunctional electronics,new-energy cars as well as to be used in smart *** Minireview summarizes the key breakthroughs and progress in expanding the electrochemical stability window(ESW)of aqueous EES devices over the past five *** briefly introducing the electrode engineering ways to widen ESW,we focus on four ground-breaking electrolyte engineering strategies and classify them into two kinds from the perspective of salts and exotic solutes/*** widening degree toward ESW of these emerging electrolytes is compared and the universal fundamental mechanism relating to the interactions between limited water molecules and high-concentration salts(or large amounts of exotic solutes/solvents)is *** challenges and perspectives for high-ESW electrolytes as well as recent advances in low-cost and other metal ion(sodium,potassium,zinc,etc.)-based electrolytes for expanding ESW are also outlined.

关键词： aqueous energy storage systems electrolyte engineering high voltage high-energy density water electrolysis

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Improving high-temperature mechanical properties of cast CrFeCoNi high-entropy alloy by highly thermostable in-situ precipitated carbides

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Journal of Materials Science & technology 2021年第13期72卷 29-38页

作者： X.W.Liu N.Gao J.Zheng Y.Wu Y.Y.Zhao Q.Chen W.Zhou S.Z.Pu W.M.Jiang Z.T.Fan State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621999China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China School of Materials Engineering Purdue UniversityWest LafayetteIN 47907USA Southwest Technology and Engineering Research Institute Chongqing 400039China Center for Electron Microscopy Wuhan UniversityWuhan 430072China

The Cr Fe Co Ni high-entropy alloy(HEA)exhibits excellent mechanical properties at lower temperatures due to its low stacking-fault energy,however,its medium-and high-temperature strengths are still *** consideration of the potential diversified applications,more strengthening approaches except for the previously proposed L12 phase hardening deserve further exploration due to its rapid coarsening tendency at high ***,we achieved significant high-temperature strengthening of the cast Cr Fe Co Ni HEA by in-situ precipitation of highly thermostable *** with 0.5 at.%and 1 at.%niobium and carbon were prepared by simple casting processes,*** cast,solute solution and aging.A highly thermostable microstructure was formed,which comprises very coarse grains accompanied with extensive thermostable carbide precipitates embedded,including submicrometer coherent Nb C particles in grain interiors and intergranular coherent M_(23)C_(6)*** high thermostability of microstructure,which is beneficial for the high-temperature loading,is ascribed to the synergy of lacking growth driving force and Zenner pinning effect by the *** properties tested at 673,873 and1073 K show that the yield strength and ultimate tensile strength are significantly increased by Nb/C doping,along with the elongation escalation at higher *** strengthening is mainly due to the precipitation hardening of carbide particles.

关键词： High-entropy alloy Carbides Precipitation High-temperature property Strengthening

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Effect of thickness variations of lithium niobate on insulator waveguide on the frequency spectrum of spontaneous parametric down-conversion

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Chinese Physics B 2021年第11期30卷 268-273页

作者： Guang-Tai Xue Xiao-Hui Tian Chi Zhang Zhenda Xie Ping Xu Yan-Xiao Gong Shi-Ning Zhu National Laboratory of Solid State Microstructures School of PhysicsSchool of Electronic Science and EngineeringCollege of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Institute for Quantum Information and State Key Laboratory of High Performance Computing College of ComputingNational University of Defense TechnologyChangsha 410073China

We study the effect of waveguide thickness variations on the frequency spectrum of spontaneous parametric downconversion in the periodically-poled lithium niobate on insulator(LNOI)*** analyze several variation models and our simulation results show that thickness variations in several nanometers can induce distinct effects on the central peak of the spectrum,such as narrowing,broadening,and *** also prove that the effects of positive and negative variations can be canceled and thus lead to a variation-robust feature and an ultra-broad *** study may promote the development of on-chip photon sources in the LNOI platform,as well as opens up a way to engineer photon frequency state.

关键词： lithium niobate on insulator spontaneous parametric down-conversion waveguide thickness variation frequency spectrum

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Increasing ionic conductivity in Li_(0.33)La_(0.56)TiO_(3)thin-films via optimization of processing atmosphere and temperature

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Rare Metals 2022年第1期41卷 179-188页

作者： Shi-Pai Song Cheng Yang Chun-Zhi Jiang Yong-Min Wu Rui Guo He Sun Jing-Lei Yang Yong Xiang Xiao-Kun Zhang School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China State Key Laboratory of Space Power-Sources Technology Shanghai Institute of Space Power-SourcesShanghai 200245China Department of Mechanical and Aerospace Engineering Hong Kong University of Science and TechnologyHong Kong 999077China Advanced Energy Research Institute University of Electronic Science and Technology of ChinaChengdu 611731China Sichuan Provincial Engineering Research Center of Flexible Display Material Genome University of Electronic Science and Technology of ChinaChengdu 611731China

As a promising solid electrolyte for thin-film lithium batteries,the amorphous Li_(0.33)La_(0.56)TiO_(3)(LLTO)thin film has gained great ***,enhancing ionic conductivity remains challenging in the ***,a systematical study was performed to improve the ionic conductivity of sputter-deposited LLTO thin films via the optimization of processing atmosphere and *** combining the optimized oxygen partial pressure(30%),annealing temperature(300℃),and annealing atmosphere(air),an amorphous LLTO thin film with an ionic conductivity of 5.32910^(-5)·S·cm^(-1) at room temperature and activation energy of 0.26 eV was *** results showed that,first,the oxygen partial pressure should be high enough to compensate for the oxygen loss,but low enough to avoid the abusive oxygen scattering effect on lithium precursors that results in a lithium-poor *** oxygen partial pressure needs to achieve a balance between lithium loss and oxygen defects to improve the ionic ***,a proper annealing temperature reduces the oxygen defects of LLTO thin films while maintaining its amorphous state,which improves the ionic ***,the highest ionic conductivity for the LLTO thin films that were annealed in air(a static space without a gas stream)occurs because of the decreased lithium loss and oxygen defects during *** findings show that the lithium-ion concentration and oxygen defects affect the ionic conductivity for amorphous LLTO thin films,which provides insight into the optimization of LLTO thin-film solid electrolytes,and generates new opportunities for their application in thinfilm lithium batteries.

关键词： Li_(0.33)La_(0.56)TiO_(3) Thin film Ionic conductivity Lithium-ion concentration Oxygen defects

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Active-matrix Addressed High Brightness and Ultra-high PPI Field-Sequential-Color Display based on Deformed Helix Ferroelectric Liquid Crystal for VR/AR

Active-matrix Addressed High Brightness and Ultra-high PPI F...

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International Conference on Display technology, ICDT 2022

作者： Sun, Zhibo Wang, Sisi Yuan, Zhengnan Xia, Zhihe Lu, Lei Wong, Man Kwok, Hoi-Sing Srivastava, Abhishek Kumar State Key Laboratory of Advanced Displays and Optoelectronics Technologies Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Kowloon Hong Kong Electronic and Computer Engineering Peking University Shenzhen518055 China

Barriers exits regarding increasing brightness and pixel density for various display technologies, be it, LCD, LED and OLED. In this paper, we proposed a defect-free high-contrast fast (~100us) active-matrix addressed DHFLC with a theoretical 11500 PPI due to its nature of no fringe field effect (FFE) and high capacitance, shedding a light on the barriers. For the realization, the no-storage-capacitor AM-DHFLC display device is fabricated as preliminary demo with both optimizations in the DHFLC alignment and pixel design. Innovatively, the no-storage-capacitor characteristic, which is impossible for NLC, not only rockets efficiency and aperture ratio from 57% to 83% with high brightness, but also reveals the potential in reducing the pixel size for higher resolution. Moreover, fast response around 100 us at 360 Hz for FSC display and no-FFE strengthen the promising potential of DHFLC in various modern display technologies, be it VR/AR, high PPI display, micro display, and high-resolution hologram. © 2022, John Wiley and Sons Inc. All rights reserved.

关键词： Rockets

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Effect of Zn Transition Layer on Properties of Vacuum Deposited Zn-Mg Coating 3

Effect of Zn Transition Layer on Properties of Vacuum Deposi...

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2022 3rd International Conference on Mechanical engineering and Materials, ICMEM 2022

作者： Liu, Qiuyuan Qiu, Xiaopan Liu, Xin Zhao, Xingyuan Jiang, Sheming Zhang, Qifu Laboratory of Advanced Coating Technology for Metals China Iron and Steel Research Institute Group National Engineering Beijing100081 China State Key Laboratory of Multiphase Complex Systems Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China

Zinc coatings have been served as a barrier and a galvanic protection for steel products for over a century. However, with the depletion of zinc resources, it becomes an urgent issue to obtain a new type of zinc coating that uses less zinc and has higher corrosion resistance. In order to develop Zn/ZnMg coatings with better corrosion resistance than traditional galvanized steel and suitable for advanced high strength steel, the vacuum thermal evaporation technique was used to simultaneously deposit Zn/ZnMg coating onto interstitial free steel plates and single-crystal silicon wafers in a high vacuum environment. The microstructure, morphology, adhesion and corrosion resistance behavior of the Zn/ZnMg coating were studied by scratch test, salt spray test and electrochemical method. The results shows that the grain size in the Zn/ZnMg coating tended to increase with the increase of the substrate temperature. After deposited the pure Zn transition layer, the adhesion of the coating has been obviously improved. When the substrate temperature was increased to 200°C, the obtained coating exhibited strong corrosion resistance. © Published under licence by IOP Publishing Ltd.

关键词： Corrosion resistance

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Surface defect engineered-Mg-based implants enable the dual functions of superhydrophobic and synergetic photothermal/chemodynamic therapy

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Bioactive Materials 2023年第12期30卷 15-28页

作者： Dongdong Zhang Ru Xu Shuhan Chen Huihui Du Shi Qian Feng Peng Xuanyong Liu State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China Shenzhen Key Laboratory for Innovative Technology in Orthopaedic Trauma The University of Hong Kong Shenzhen HospitalShenzhenChina Center for Human Tissues and Organs Degeneration Shenzhen Institutes of Advanced TechnologyChinese Academy of ScienceShenzhen518055PR China Medical Research Institute Department of OrthopedicsGuangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences)Southern MedicalUniversityGuangzhou510080China GuangDong Engineering Technology Research Center of Functional Repair of Bone Defects and Biomaterials Guangzhou510080China School of Chemistry and Materials Science Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of Sciences1 Sub-lane XiangshanHangzhou310024China

Promoting metallic magnesium(Mg)-based implants to treat bone diseases in clinics,such as osteosarcoma and bacterial infection,remains a challenging ***,an iron hydroxide-based composite coating with a twostage nanosheet-like structure was fabricated on Mg alloy,and this was followed by a thermal reduction treatment to break some of the surface Fe–OH *** coating demonstrated three positive changes in properties due to the ***,the removal of–OH made the coating superhydrophobic,and it had self-cleaning and antifouling *** is beneficial for keeping the implants clean and for anti-corrosion before implantation into the human ***,the superhydrophobicity could be removed by immersing the implant in a 75%ethanol solution,to further facilitate biological action during ***,the color of the coating changed from yellow to brown-black,leading to an increase in the light absorption,which resulted in an excellent photothermal ***,the defects increased the Fe2+content in the coating and highly improved peroxidase ***,the defect coating exhibited synergistic photothermal/chemodynamic therapeutic effects for bacteria and ***,the coating substantially enhanced the anti-corrosion and biocompatibility of the Mg ***,this study offers a novel multi-functional Mg-based implant for osteosarcoma therapy.

关键词： Magnesium-based implants Surface defects Superhydrophobic Anti-bacterial Anti-tumor

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Brain organoids in motor cortex involved in motor output 24

Brain organoids in motor cortex involved in motor output

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9th International Conference on Biomedical Signal and Image Processing, ICBIP 2024

作者： Fan, Xiaoman Xu, Yuchen Xu, Shibo Yang, Yuqi Shi, Lufeng Liu, Yan Zhang, Shaomin Qiushi Academy for Advanced Studies Department of Biomedical Engineering Zhejiang University China Center of Excellence in Biomedical Research on Advanced Integrated-on-Chips Neurotechnologies School of Engineering Westlake University China State Key Laboratory of Reproductive Medicine Institute for Stem Cell and Neural Regeneration Nanjing Medical University China Qiushi Academy for Advanced Studies Department of Computer Science and Technology Zhejiang University China Department of Neurosurgery Sir Run Run Shaw Hospital Medical College Zhejiang University China

ISBN: (纸本)9798400717970

Motor function is essential in daily life while brain damage in motor system such as stroke would lead to long term motor function deficits. Brain organoids, a novel in vitro stem cell culture technology, offer a new idea for motor function recovery. In this study, we pumped out the motor cortex of forelimbs to mimic brain injury in mice and implanted human brain organoids into the cavity combined with microwire electrodes to simultaneously record neural signals from both the organoids and the host animals. Our findings indicate that the brain organoids can be involved in motor output and the involvement can be improved through behavioral training. © 2024 Copyright held by the owner/author(s).

关键词： Stem cells

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