检索结果-内蒙古大学图书馆

arXiv 2024年

作者： Miao, Jian-Jian Chen, Wei-Qiang Shenzhen508045 China Department of Physics Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices Southern University of Science and Technology Shenzhen518055 China

Motivated by the order fractionalization in Kitaev-Kondo model, we propose an exactly solvable spin-charge ladder model to study the order fractionalization with discrete symmetry. The spin-charge ladder is composed of a spin chain and a superconducting wire coupled via an Ising-type interaction, and we obtain the exact solution in the flat band limit. The exact solution reveals the Z2 order fractionalization with dual symmetry breaking and intertwined order parameters. We investigate the topological phase transition of the spin-charge ladder via the spectral chiral index, and identify the correlated topological superconductor (TSC*) phase with gapped Z2 Kondo flux excitations. We demonstrate Majorana spinons generated odd frequency pairing in the superconducting wire. We also discuss the order fractionalization in the perspective of Z2 lattice gauge theory. © 2024, CC BY.

关键词： Topology

来源：评论

学校读者我要写书评

暂无评论

A butterfly-shaped acceptor with rigid skeleton and unique assembly enables both efficient organic photovoltaics and high-speed organic photodetectors

引用

国家科学评论（英文版） 2025年第1期12卷 211-221页

作者： Wendi Shi Qiansai Han Yu Zhu Yingjun Xia Tengfei He Shijie Wang Longyu Li Wei Ma Guankui Long Guanghui Li Zhaoyang Yao Chenxi Li Xiangjian Wan Yongsheng Chen State Key Laboratory of Elemento-Organic Chemistry Frontiers Science Center for New Organic MatterThe Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer MaterialsInstitute of Polymer ChemistryRenewable Energy Conversion and Storage Center(RECAST)Tianjin Key Laboratory of Functional Polymer MaterialsNankai UniversityTianjin 300071China State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong UniversityXi'an 710049China School of Materials Science and Engineering National Institute for Advanced MaterialsRenewable Energy Conversion and Storage Center(RECAST)Nankai UniversityTianjin 300350China

It remains challenging to design efficient bifunctional semiconductor materials in organic photovoltaic and photodetector ***,we report a butterfly-shaped molecule,named WD-6,which exhibits low energy disorder and small reorganization energy due to its enhanced molecular rigidity and unique assembly with strong intermolecular *** binary photovoltaic device based on PM6:WD-6 achieved an efficiency of 18.41％.Notably,an efficiency of 19.42％was achieved for the ternary device based on PM6:BTP-eC9:***,the photodetection device based on WD-6 demonstrated an ultrafast response speed(205 ns response time at λ of 820 nm)and a high cutoff frequency of-3 dB(2.45 MHz),surpassing the values of most commercial Si *** on these findings,we showcased an application of the WD-6-based photodetection device in high-speed optical *** results offer valuable insights into the design of organic semiconductor materials capable of simultaneously exhibiting high photovoltaic and photodetective performance.

关键词： organic photovoltaics organic photodetectors electron acceptor efficiency response speed

来源：评论

学校读者我要写书评

暂无评论

“Three‐in‐one”strategy:Heat regulation and conversion enhancement of a multifunctional separator for safer lithium-sulfur batteries

引用

Carbon Energy 2023年第11期5卷 54-67页

作者： Kaiping Zhu Luhe Li Pan Xue Jun Pu Liyun Wu Gengde Guo Ran Wang Ye Zhang Huisheng Peng Guo Hong Qiang Zhang Yagang Yao National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesJiangsu Key Laboratory of Artificial Functional MaterialsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjingChina Key Laboratory of Functional Molecular Solids Ministry of EducationCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhuChina State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceLaboratory of Advanced MaterialsFudan UniversityShanghaiChina Department of Materials Science and Engineering College of EngineeringCity University of Hong KongHong KongChina Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijingChina

The safety problems encountered with lithium–sulfur batteries(LSBs)hinder their development for practical ***,a highly thermally conductive separator was constructed by cross‐weaving super‐aligned carbon nanotubes(SA‐C)on super‐aligned boron nitride@carbon nanotubes(SA‐BC)to create a composite film(SA‐BC/SA‐C).This separator was used to fabricate safe LSBs with improved electrochemical *** highly aligned separator structure created a uniform thermal field that could rapidly dissipate heat accumulated during continuous operation due to internal resistance,which prevented the development of extremely high *** array of boron nitride nanosheets endowed the composite separator with a large number of adsorption sites,while the highly graphitized carbon nanotube skeleton accelerated the catalytic conversion of high‐valence polysulfides into low‐valence *** arrayed molecular brush design enabled the regulation of local current density and ion flux,and considerably alleviated the growth of lithium dendrites,thus promoting the smooth deposition of Li ***,a battery constructed with the SA‐BC/SA‐C separator showed a good discharge capacity of 685.2 mAh g−1 over 300 cycles(a capacity decay of 0.026%per cycle)at 2 C and 60°***“three‐in‐one”multifunctional separator design strategy constitutes a new path forward for overcoming the safety problems of LSBs.

关键词： conversion enhancement heat regulation high safety lithium-sulfur batteries multifunctional separator

来源：评论

学校读者我要写书评

暂无评论

Ultrafine Fe/Fe3C decorated on Fe-N_(x)-C as bifunctional oxygen electrocatalysts for efficient Zn-air batteries

引用

Journal of Energy Chemistry 2021年第5期30卷 72-79页

作者： Lingbo Zong Xin Chen Siliang Liu Kaicai Fan Shuming Dou Jie Xu Xiaoxian Zhao Wenjun Zhang Yaowen Zhang Weicui Wu Fenghong Lu Lixiu Cui Xiaofei Jia Qi Zhang Yu Yang Jian Zhao Xia Li Yida Deng Yanan Chen Lei Wang Taishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and Technology Key Laboratory of Optic-electric Sensing and Analytical Chemistry fo r Life ScienceMOEState Key Laboratory of Eco-chemical EngineeringCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042ShandongChina School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin 300072China Centre for Clean Environment and Energy School of Environment and ScienceGriffith UniversityQueensland 4222Australia College of Science Hebei Agricultural UniversityBaoding 071001HebeiChina Key Laboratory of Rubber-Plastics Ministry of Education/Shandong Provincial Key Laboratory of Rubber-PlasticsQingdao University of Science and TechnologyQingdao 266042ShandongChina College of Materials Science and Engineering Qingdao University of Science&TechnologyQingdao 266042ShandongChina

Efficient bifunctional oxygen electrocatalysts for ORR and OER are fundamental to the development of high performance metal-air ***,a facile cost-efficient two-step pyrolysis strategy for the fabrication of a bifunctional oxygen electrocatalyst has been *** efficient non-preciousmetal-based electrocatalyst,Fe/Fe_(3)C@Fe-N_(x)-C consists of highly curved onion-like carbon shells that encapsulate Fe/Fe_(3)C nanoparticles,distributed on an extensively porous graphitic carbon *** obtained Fe/Fe_(3)C@Fe-N_(x)-C aerogel exhibited superb electrochemical activity,excellent durability,and high methanol *** experimental results indicated that the assembly of onion-like carbon shells with encapsulated Fe/Fe_(3)C yielded highly curved carbon surfaces with abundant Fe-Nxactive sites,a porous structure,and enhanced electrocatalytic activity towards ORR and OER,hence displaying promising potential for application as an air cathode in rechargeable Zn-air *** constructed Zn-air battery possessed an exceptional peak power density of~147 mW cm^(-2),outstanding cycling stability(200 cycles,1 h per cycle),and a small voltage gap of 0.87 *** study offers valuable insights regarding the construction of low-cost and highly active bifunctional oxygen electrocatalysts for efficient air batteries.

关键词： Non-precious metal Nitrogen-rich carbon Fe/Fe_(3)C Fe-N_(x)-C Bifunctional oxygen electrocatalysts

来源：评论

学校读者我要写书评

暂无评论

On Water Growth of Continuous Thin Films of Two-Dimensional Covalent Organic Frameworks with Large Single-Crystal Domains

引用

Chinese Journal of Chemistry 2023年第19期41卷 2425-2431页

作者： Zihao Liang Baokun Liang Li Gong Yonghang Yang Fengpiao Deng Xinyu Wang Yuanjun Xia Zhipeng Zhou Xin Dong Jiaxing Lu Wei Liu Zhongke Yuan Haoyuan Qi Zhikun Zheng Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education School of Chemistryand State KeyLaboratory of Optoelectronic Materials and TechnologiesSun Yat-Sen UniversityGuangzhouGuangdong 510275China Central Facility for Electron Microscopy Electron Microscopy Group of Materials ScienceUniversitit Ulm89081UlmGermany Instrumental Analysis and Research Center Sun Yat-Sen UniversityGuangzhouGuangdong 510275China The First School of Clinical Medicine Southern Medical UniversityGuangzhouGuangdong 510515China Department of Orthopedics General Hospital of Southern Theater CommandGuangzhouGuangdong 510010China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory JieyangGuangdong 515200China Key Laboratory of Low-Carbon Chemistry&Energy Conservation of Guangdong Province Key Laboratory for Polymeric Composite and Functional Materials of Ministry of EducationSchool of Materials Science and Engineeringand State Key Laboratory of Optoelectronic Materials and TechnologiesSun Yat-sen UniversityGuangzhouGuangdong 510275China School of Chemical Engineering and Light Industry Guangdong University pf TechnologyGuangzhouGuangdong 510006China Faculty of Chemistry and Food Chemistry&Center for Advancing Electronics Dresden(cfaed) Technische Universitat Dresden01062DresdenGermany

A core feature of two-dimensional covalent organic frameworks is crystallinity, but it remains challenging to gain their thin films with high crystallinity. Here, we presented growth of thin films of two-dimensional covalent organic frameworks with an average domain size of ~2.83 μm^(2) and maximum domain size of up to ~26.19 μm^(2) using amphiphilic glycine derivatives on water surface. We envisage that this work will inspire the growth of a wide variety of organic two-dimensional materials with high crystallinity and boost their structure property investigations.

关键词： Covalent organic frameworks Thin polymer films Self-assembly Two-dimensional polymers Surfactants

来源：评论

学校读者我要写书评

暂无评论

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

引用

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

来源：评论

学校读者我要写书评

暂无评论

Enhancement in photovoltaic properties of Nd:SnS films prepared by low-cost NSP method

引用

Rare Metals 2022年第5期41卷 1661-1670页

作者： S.Sebastian I.Kulandaisamy A.M.S.Arulanantham S.Valanarasu A.Kathalingam Mohd.Shkir Salem AlFaify PG&Research Department of Physics Arul Anandar CollegeKarumathurMadurai 625514India Millimeter Wave Innovation Technology Research Center(MINT) Dongguk University-SeoulSeoul 04620Republic of Korea Advanced Functional Materials&Optoelectronics Laboratory(AFMOL) Department of PhysicsFaculty of ScienceKing Khalid UniversityAbha 9004Saudi Arabia

The inner transition metal(ITM) neodymium(Nd)-doped tin sulfide(Nd:SnS) thin films with various Nd concentrations were coated by nebulizer spray pyrolysis(NSP) technique at 350℃. All the coated films were analyzed for their structural, optical and photoelectrical properties. X-ray diffractometer(XRD) study showed(111) direction as the highly preferred orientation with orthorhombic crystal structure for all the films. The intensity of the peaks was found to increase until 5 at% Nd doping and then reduced for higher(7 at% Nd) doping concentration. Atomic force microscopic(AFM) images of the films proclaimed an increase in the surface and line roughness of the films by increasing Nd *** analysis on the films showed a variation in energy gap from 2.05 to 1.69 eV when the doping concentration increased from 0 at% to 7 at%. At 5 at% Nd doping, the photoluminescence(PL) spectra displayed a single strong emission peak at 723.1 nm with enhanced intensity corresponding to near-band-edge emission. All the SnS thin films exhibited p-type behavior with the lowest resistivity of ~ 4.311 Ω·cm and high carrier concentrations of ~ 1.441 × 10^(17)cm^(-3) for 5 at% Nd doping level as observed from Hall effect studies. Furthermore, fluorinedoped tin oxide(FTO)/n-CdS/p-Nd:SnS hetero-junction solar cells were prepared and the current–voltage curve in dark and light condition was obtained for the device. An efficiency of 0.135% was observed for the solar cell fabricated with 5 at% Nd-doped SnS thin film.

关键词： Rare earth doping Neodymium SnS thin films Nebulizer spray Optical studies Solar cells

来源：评论

学校读者我要写书评

暂无评论

Stabilizing charge storage of Fe_(2)O_(3)-based electrode via phosphate ion functionalization for long cycling life

引用

Rare Metals 2023年第1期42卷 39-46页

作者： Li-Ming Wan Qiu-Ying Xia Jiang-Hua Wu Jing Liu Zheng-Yi Shi Si Lan Teng Zhai Serguei V.Savilov Sergey M.Aldoshin Hui Xia Herbert Gleiter Institute of Nanoscience School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing210094China National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing210093China Department of Chemistry M.V.Lomonosov Moscow State UniversityMoscow119991Russian Federation Faculty of Fundamental Physical and Chemical Engineering M.V.Lomonosov Moscow State UniversityMoscow119991Russian Federation

Compositing metal oxides with nanostructured carbon or conductive polymer supports has been regarded as a compelling way to develop electrode materials with enhanced energy density as well as large power in ***,the corresponding cycling stability is still greatly limited due to the intrinsic dissolution of metal oxide nanostructures during redox ***,phosphate ions modified Fe_(2)O_(3) nanoparticles composited with hollow carbon nanosheet arrays have been synthesized as desirable electrodes with both significantly expanded lifespan and high pseudocapacitance.

关键词： electrode expanded charge

来源：评论

学校读者我要写书评

暂无评论

In-situ generation of poly(quinolizine)s via catalyst-free polyannulations of activated diyne and pyridines

引用

science China Chemistry 2022年第4期65卷 789-795页

作者： Benzhao He Jiachang Huang Jing Zhang Xinyue Liu Dong Wang Herman H.Y.Sung Yajun Liu Anjun Qin Jacky W.Y.Lam Ben Zhong Tang Center for Advanced Materials Research Science and Technology Experimental PlatformAdvanced Institute of Natural SciencesBeijing Normal University at ZhuhaiZhuhai 519085China Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstructionand Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional MaterialsThe Hong Kong University of Science&TechnologyKowloonHong KongChina Center for AIE Research College of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China Department of Laboratory Medicine Nanfang HospitalSouthern Medical UniversityGuangzhou 510515China State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesCenter for Aggregation-Induced EmissionSouth China University of TechnologyGuangzhou 510640China HKUST-Shenzhen Research Institute Shenzhen 518057China Shenzhen Institute of Aggregate Science and Technology School of Science and EngineeringThe Chinese University of Hong KongShenzhen 518172China

The development of new polymerization routes to afford N-heterocyclic polymers is of vital importance and highly desired for various practical applications. Herein, a facile and efficient polyannulation reaction of dual-activated alkyne and pyridines was developed to construct novel N-heterocyclic poly(quinolizine)s. This polymerization can proceed smoothly under catalystfree conditions with 100% atom utilization to furnish poly(quinolizine)s with high molecular weights(up to 34,100) and welldefined structures in acceptable yields. The resulting polymers show good solubility, high thermal stability and strong red emission. Moreover, the prepared poly(quinolizine)s exhibit low cytotoxicity and can selectively label lysosomes in live *** the remarkable advantages of readily available raw materials, mild polymerization conditions, atom economy, and excellent product performance, this new and efficient polymerization tool will open up enormous opportunities for preparing functional N-heterocyclic polymers.

关键词： polyannulation activated alkyne N-heterocyclic polymers poly(quinolizine)s bioimaging

来源：评论

学校读者我要写书评

暂无评论

Precipitation mechanism and microstructural evolution of Al2O3/ZrO2(CeO2) solid solution powders consolidated by spark plasma sintering

引用

Journal of Materials science & technology 2020年第6期41卷 149-158页

作者： Wanjun Yu Yongting Zheng Yongdong Yu National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and Structures Harbin Institute of TechnologyHarbin 150080China

It is difficult to synthesize Al2O3/ZrO2 solid solution because of its low solubility under equilibrium solidification *** this work,a new combustion synthesis combined with water atomization(CS-WA)method was developed to prepare supersaturated Al2O3/ZrO2(CeO2)solid solution *** ultrahigh cooling rate supplied by CS-WA greatly extends solid solubility of Al2O3 in *** precipitation mechanism of solid solution was investigated by systematic heat *** initial temperature of the metastable phase decomposed into Al2O3 and ZrO2 is 1050℃,and it could be completely precipitated at 1400℃in 0.5 *** precipitated ZrO2 particles were uniformly dispersed in Al2O3 matrix and grew into submicron scale at annealing temperature of 1450℃.Subsequently,together with detailed microstructure,phase composition,as well as mechanical properties were collaboratively outlined to discuss spark plasma sintering(SPS)*** solid solution precipitated Al2O3 matrix and ZrO2 particles during the SPS *** ZrO2 particles were uniformly distributed within Al2O3 matrix,while the residuary ZrO2 located at the grain boundaries and formed special transgranular/intergranular *** average size of nanoscale transgranular ZrO2 particles was only^11.5 *** compact ZrO2 toughened Al2O3 nano ceramic(N-ZTA)exhibits excellent mechanical *** work provides a guidance to produce nanostructured ZTA with high performance.

关键词： Solid solution Precipitation Spark plasma sintering ZTA Transgranular/intergranular structure

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：