检索结果-内蒙古大学图书馆

SSRN 2024年

作者： Cui, Gaoxi Li, Tongyang Wang, Ziyue Wang, Lujie Yu, Yuan Tang, Huaguo Qiao, Zhuhui College of Materials Science and Chemical Engineering Harbin Engineering University Harbin150001 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 Yantai264006 China Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering Yantai264006 China Qingdao Center of Resource Chemistry and new Materials PR China Qingdao264006 China

In this study, Cu-containing Si3N4 was prepared by in-situ method using copper citrate as the second phase additive. The phase composition, microstructure, hardness, fracture toughness, and tribological properties of Cu-containing Si3N4 were investigated. The reinforcement phase was in the form of Cu3Si, which effectively improved the fracture toughness and tribological properties of Si3N4. When the Cu3Si phase content was 3wt%, the fracture toughness of Cu-containing Si3N4 could be increased by 27.1% compared to the Si3N4. When the Cu3Si phase content reached 12%, the wear rate at room temperature was reduced by 59% compared to the substrate. The toughing mechanism could be summarized as the crack bridging and deflection of the Cu3Si phase. The anti-wear mechanism could be concluded as the reduction of micro-cracks in the friction film with the participation of Cu3Si phase, thus reducing the loss in the friction process. © 2024, The Authors. All rights reserved.

关键词： Wear resistance

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Preparation Method and Performance Characterization of All-solid-Waste-Based Foam Geopolymer

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SSRN 2023年

作者： Song, Yongpeng Zhao, Qingxin Xue, Caihong Guo, Weichao Bai, Yanying Shi, Yuxuan State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao066000 China Hebei Province Engineering Research Center for Harmless Synergistic Treatment and Recycling of Municipal Solid Waste Yanshan University Qinhuangdao066000 China

In this study, foam geopolymer (FC) containing EPS (recycled expanded polystyrene) was developed from alkali activation of ground granulated blast-furnace slag (GGBS) and red mud (RM) by alkaline solid wastes including municipal solid waste incineration fly ash (MSWIFA) and carbide slag (CS), where aluminum powder and soybean was used as foam agent and foam stabilizer, respectively. The effect of water-to-binder ratio, Al powder particle size and content, stabilizer content and the addition of EPS on the properties of the FC was investigated. Moreover, XRD, FTIR, TG-DTG and SEM-EDS were employed to analyze the reaction products as well as to reveal the influence of Al powder and stabilizer on the hydration process. The results show that a higher water-to-binder ratio, fineness and content of Al powder facilitated the formation of smaller pores thus FC with lower dry density, and the dry density can be effectively reduced by the incorporation of EPS. The soybean oil prolonged the setting of fresh mix and thus allowed a better distribution of pores, but more than 0.5% soybean oil caused the collapse of FC. A large amount of aluminum hydroxide gel generated from the reaction of Al powder in the early age can attach to the surface of the raw material, which hindered the dissolution of raw materials thus the strength development, while the aluminum hydroxide gel stage promotes the generation of hydration products in the later, improving the final strength. © 2023, The Authors. All rights reserved.

关键词： Particle size

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Natural Alkaloids (Caffeine, Theobromine and Theophylline) as Dielectric Capping Layers for Gold and Aluminum Gate Electrodes in Low Operating Voltage Organic Field-Effect Transistors

IEEE Journal on Flexible Electronics

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IEEE Journal on Flexible Electronics 2025年

作者： Irimia, Cristian Vlad Yumusak, Cigdem Ban, Boyuan Leeb, Elisabeth Mayr, Felix Schimanofsky, Corina Mardare, Andrei Ionut Molnar, Maximilian Alexander Teichert, Christian Sariciftci, Niyazi Serdar Irimia-Vladu, Mihai Institute of Physical Chemistry Altenberger Str. 69 Linz4040 Austria Graz University of Technology in Graz Master of Science student in Advanced Materials Science program Austria Montanuniversität Leoben Chair of Physics Department of Physics Mechanics and Electrical Engineering Franz Josef Str. 18 Leoben8700 Austria Key Lab of Photovoltaic and Energy Conservation Materials Institute of Solid-State Physics Hefei Institute of Physical Science Hefei230031 China Altenberger Str. 69 Linz4040 Austria National Institute for Lasers Plasma and Radiation Physics Magurele077125 Romania

Three natural alkaloids: caffeine, theobromine and theophylline are reported for their application as dielectric layers in organic field effect transistors (OFETs) utilizing both gold and aluminum gate electrodes. After careful purification of the materials, a detailed analysis using x-ray diffraction spectroscopy (XRD), Fourier transform infrared spectroscopy (FTIR), contact angle (CA), impedance spectroscopy, amplitude modulated kelvin probe force microscope (AM-KPFM) and cyclic voltammetry (CV) is performed. OFET devices operating at typical voltages between 2 and 4 V have been fabricated with the investigated alkaloid films processed via blade coating (caffeine) or vacuum processing (theobromine and theophylline). The dielectric properties of these three alkaloids are measured in impedance spectroscopy and negligible leakage currents are observed when deposited in thin films as dielectric layers in OFETs on aluminum electrodes. There is a high tendency of these molecules to crystallize and form uneven surfaces. When the thin film forming properties are carefully controlled, organic alkaloids can be employed in applications involving implantable, transient or even edible electronics. © 2022 IEEE.

关键词： Fourier transform infrared spectroscopy

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Measurement of Superconductivity and Edge states in Topological Superconductor Candidate TaSe_(3)

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Chinese Physics Letters 2021年第7期38卷 110-115页

作者： Shuai Liu Si-Min Nie Yan-Peng Qi Yan-Feng Guo Hong-Tao Yuan Le-Xian Yang Yu-Lin Chen Mei-Xiao Wang Zhong-Kai Liu School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China Department of Materials Science and Engineering Stanford UniversityStanfordCA 94305USA National Laboratory of Solid State Microstructures College of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China State Key Laboratory of Low Dimensional Quantum Physics Department of PhysicsTsinghua UniversityBeijing 100084China Frontier Science Center for Quantum Information Beijing 100084China Department of Physics University of OxfordOxfordOX13PUUK ShanghaiTech Laboratory for Topological Physics Shanghai 201210China

Topological superconductors(TSCs)have been widely investigated in recent years due to their novel physics and ability to host Majorana fermions(MFs)which are key to topological quantum *** the great interest,only a few compounds have been proposed as candidates of intrinsic TSCs,such as iron-based superconductor FeSe_(0.55)Te_(0.45) and 2M-WS_(2).Among them,quasi-one-dimensional superconductor TaSe_(3) possesses fascinating properties such as its simple stoichiometry,layered nature and chemical ***,using scanning tunneling microscope/spectroscopy(STM/STS),we systematically investigate the topography and electronic structure of TaSe_(3).Our STM/STS measurement reveals large atomically flat,defect-free surfaces suitable for the search of MF;electronic density of states consistent with our angle-resolved photoemission result and band-structure calculations,and a uniform superconducting gap with a typical size of∼0.25 ***,additional edge states are observed in the vicinity of the terrace edge,suggesting they may have a topological *** result proves the coexistence of superconductivity and topological electronic structure in TaSe_(3),making it an intriguing platform to investigate topological superconductivity.

关键词： stability topological superconductor

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High-flux and anti-salt solar desalination via scalable photothermal textiles with vertically confined water layers

Device

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Device 2025年第6期3卷

作者： Zhang, Qian Wang, Manyu Yu, Hao Xu, Ning Xiao, Xingfang Pan, Luqi Zhu, Jia Xu, Weilin State Key Laboratory of New Textile Materials and Advanced Processing Wuhan Textile University Wuhan 430200 China National Laboratory of Solid State Microstructures College of Engineering and Applied Sciences Jiangsu Key Laboratory of Artificial Functional Materials Frontiers Science Center for Critical Earth Material Cycling Nanjing University Nanjing China

Interfacial solar evaporation plays a crucial role in desalination because of its sustainable, eco-friendly characteristics. However, major challenges to simultaneously achieving salt rejection, fast evaporation, and heat localization in solar desalination devices still remain. We propose a photothermal textile with vertically confined water layers for scalable, high-flux, long-term-reliable solar desalination. The photothermal textile consists of outer layers (carbon fibers) for solar absorption and core layers (hollow yarns) for water-feeding channels. Three-dimensional evaporators possess large evaporation areas and, thus, high evaporation rates, and the vertically confined water layers in the hollow yarns enable natural convection for effective salt rejection with negligible heat loss. Consequently, this photothermal textile achieves an evaporation rate of 2.05 kg m⁻² h⁻¹ in high-salinity brine (15 wt % NaCl solution) under 1-sun irradiation, with long-term reliability of over 20 days in continuous outdoor operation. © 2025 The Author(s)

关键词： DTI-2: Explore high flux photothermal textile salt rejection solar desalination vertically confined water layer

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Effects of Various Curing Methods on the Properties of Red Mud-Calcium Carbide Slag-Based Lightweight Aggregate Ceramsite Synthesized Through Cold-Bonded Pelletization Technology

SSRN

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SSRN 2023年

作者： Shi, Yuxuan Zhao, Qingxin Xue, Caihong Jia, Yali Guo, Weichao Wang, Di Wang, Shuai Gao, Yongshuai State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao066000 China Hebei Province Engineering Research Center for Harmless Synergistic Treatment and Recycling of Municipal Solid Waste Yanshan University Qinhuangdao066000 China

Industrial solid wastes red mud and calcium carbide slag are used to prepare lightweight aggregate ceramsite by cold-bonded pelletizing technology in this study. The effects of mixing water and curing method on the physical properties of ceramsite were investigated, including natural curing (in air at 20°C), sealed curing, water curing, hot air oven curing, steam curing, and CO2 curing. The results showed that the lightweight aggregate had the lowest cylinder crush strength, the lowest apparent density, and the highest water absorption after natural curing. The highest cylinder crush strength of 8.7 MPa was obtained by steam curing at 60°C for 12 h, which was 180.65% higher than that of natural curing because the high temperature promoted the hydration reaction thus the formation of C-(A)-S-H gel and hydrotalcite. CO2 curing at 60°C significantly reduced the water absorption of the lightweight aggregate by 50% and by 38.03% as compared to that obtained by natural curing and steam curing at 60°C for 12 h, respectively. During CO2 curing, the reaction between CO2 and Ca(OH)2 from the calcium carbide slag can form a dense layer of CaCO3, increasing the structural compactness and reducing the water absorption. © 2023, The Authors. All rights reserved.

关键词： Pelletizing

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Improvement on the topological localized interface enabled by chiral symmetry

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Photonics Research 2023年第9期11卷 1517-1523页

作者： JINGXUAN CHEN MINGJIN WANG TING FU YUFEI WANG XUEYOU WANG YINGQIU DAI ZIYUAN LIAO HAIYANG JI WANHUA ZHENG Laboratory of Solid State Optoelectronics Information Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China College of Future Technology University of Chinese Academy of SciencesBeijing 101408China Weifang Academy of Advanced Opto-Electronic Circuits Weifang 261021China

Zero-energy topological states,which are protected by chiral symmetry against certain perturbations topologically,localize at interfaces between trivial and non-trivial phases in the Su–Schrieffer–Heeger(SSH)chain ***,we propose and demonstrate a method to manipulate chiral symmetry itself to improve the localized interfaces and enlarge the mode volume of topological states in the SSH model,thus optimizing the lasing performance of localized *** multiple defects corresponding to off-diagonal perturbations in an eigenmatrix are introduced,the topological state expands and extends to extra defects at the topological interface without breaking chiral *** apply the proposed method in electrical pumping semiconductor laser arrays to verify our theoretical prediction and optimize the output characteristics of the *** measured results of the proposed multi-defect SSH laser array show that the output power has been increased by 27%,and the series resistance and far-field divergence have been reduced by half compared to the traditional SSH laser array,establishing a high-performance light source for integrated silicon photonics,infrared light detection and ranging,and so *** work demonstrates that the proposed method is capable of improving topological localized interfaces and redistributing zero-energy topological ***,our method can be applied to other platforms and inspire optimizations of more devices in broader areas.

关键词： pumping symmetry interface

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Whole solid Waste Inorganic Lightweight Foam Material: Preparation and Effects of Various Parameters on its Properties

SSRN

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SSRN 2023年

作者： Zhao, Qingxin Gao, Yongshuai Guo, Weichao Shi, Yuxuan Jia, Yali Wang, Shuai Li, Mengyi Wang, Di State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao066000 China Hebei Province Engineering Research Center for Harmless Synergistic Treatment and Recycling of Municipal Solid Waste Yanshan University Qinhuangdao066000 China

Flammable conventional organic foam materials imply fire hazards to constructions and buildings. Given that the accumulated alkaline solid wastes, such as red mud (RM) and carbide slag (CS), seriously damage the ecology, their safe utilization in developing nonflammable inorganic foam building materials is very lucrative. This study produced whole solid waste inorganic foam materials through chemical foaming, with aluminum powder used as a foaming agent. This preparation process was optimized by studying the effects of aluminum powder content, water-binder ratio, and stirring water temperature on the absolute dry density, compressive strength, porosity, pore morphology, and pore size distribution of the specimens. With the increased aluminum powder content and water-binder ratio, the specimen porosity and compressive strength drop. With rising stirring water temperature, the specimen porosity first grows and then drops, with a further increase, while the compressive strength first drops, then grows, and finally drops again. The optimal experimental parameters (aluminum powder content of 1%, water-cement ratio of 0.7, and stirring water temperature of 40°C) provide the foam specimen’s porosity of 33.2%, compressive strength of 0.41 MPa after 28 days, and a dry density below 0.5 g/cm3. © 2023, The Authors. All rights reserved.

关键词： Water temperature

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Salt-assisted growth and ultrafast photocarrier dynamics of large-sized monolayer ReSe2

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Nano Research 2020年第3期13卷 667-675页

作者： Shaolong Jiang Jin Yang Yuping Shi Jing Zhao Chunyu Xie Liyun Zhao Jiatian Fu Pengfei Yang Yahuan Huan Qin Xie Huachao Jiang Qing Zhang Xianlong Wang Fuhai Su Yanfeng Zhang Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing100871China Key Laboratory of Materials Physics Institute of Solid State PhysicsChinese Academy of SciencesHefei230031China University of Science and Technology of China Hefei230026China Center for Nanochemistry(CNC) Beijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing100871China

Owing to its anisotropic optical and electrical properties,rhenium diselenide(ReSe2)has garnered considerable attention recently as a candidate material for polarization-sensitive ***,the direct and controllable synthesis of large-sized ReSe2 with a uniform thickness is still a great ***,we have refined the synthesis method to obtain uniform monolayer ReSe2 flakes with a size of up to^106μm on sapphire via an ambient-pressure chemical vapor deposition technique using Na promoter from sodium ***,optical pump-probe spectroscopy revealed a fast switching from saturable absorption(SA)to absorption enhancement(AE)in subpicosecond time scale,followed by a slower decay induced by exciton ***,both AE and SA signals exhibited clear angular dependence with a periodicity of 180°,which reflected the dichroism in nonlinear absorption *** addition,the photocarrier dynamics including free-carrier transport and subpicosecond relaxation due to exciton formation or surface trapping was probed using time resolved terahertz *** believe that our study serves as a reference for atomically controlled synthesis of large-sized ReSe2 and provides useful insights on its optoelectronic properties for novel device applications.

关键词： ReSe2 chemical vapor deposition sodium chloride large size ultrafast photocarrier dynamics

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Metal-air batteries: progress and perspective

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science Bulletin 2022年第23期67卷 2449-2486,M0004页

作者： Yuhui Chen Jijing Xu Ping He Yu Qiao Shaohua Guo Huijun Yang Haoshen Zhou State Key Laboratory of Materials-oriented Chemical Engineering Nanjing Tech UniversityNanjing 211816China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China Center of Energy Storage Materials&Technology College of Engineering and Applied SciencesNational Laboratory of Solid State MicrostructuresNanjing UniversityNanjing 210093China State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Energy Technology Research Institute National Institute of Advanced Industrial Science and TechnologyUmezonoTsukuba 305-8568Japan

The metal-air batteries with the largest theoretical energy densities have been paid much more ***,metal-air batteries including Li-air/O_(2),Li-CO_(2),Na-air/O_(2).and Zn-air/O_(2) batteries,are complex systems that have their respective scientific problems,such as metal dendrite forming/deforming,the kinetics of redox mediators for oxygen reduction/evolution reactions,high overpotentials,desolution of CO_(2),H_(2)O,*** the air and related side reactions on both anode and *** should be the main direction to address these shortages to improve ***,we summarized recently research progress in these metal-air/O_(2) *** perspectives are also provided for these research fields.

关键词： Li-air battery solid-state Li-air Sealed/closed Li-O2 battery Redox mediator Na-air/Zn-air battery

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