检索结果-内蒙古大学图书馆

Generalized assembly of sandwich-like 0D/2D/0D heterostructures with highly exposed surfaces toward superior electrochemical performances

引用

Nano Research 2022年第1期15卷 255-263页

作者： Shuqing Xue Guanhong Wu Mingzhong Li Zihan Liu Yuwei Deng Wenqian Han Xuanyu Lv Siyu Wan Xiangyun Xi Dong Yang Angang Dong State Key Laboratory of Molecular Engineering of Polymers and Department of Macromolecular Science Fudan UniversityShanghai 200438China Collaborative Innovation Center of Chemistry for Energy Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsDepartment of ChemistryFudan UniversityShanghai 200438China

Heterostructures composed of two-dimensional(2D)nanosheets and zero-dimensional(0D)nanoparticles(NPs)have attracted increasing attention because of the synergy arising from the coupling interactions between the two mixed-dimensional *** recent advances,it remains a challenge to fabricate 2D/0D heterostructures with clean and accessible surfaces,which is highly desirable for the diversity of catalytic,sensing,and energy storage ***,we report a generalized methodology that enables the facile assembly of sandwich-like 0D/2D/0D heterostructures with facilitated mass-transport channels and exposed surface active sites.A ligand-exchange strategy with HBF4 is employed to strip off the surface-coating ligands of colloidal NPs,rendering them positively charged and dispersible in polar *** allows subsequent electrostatic assembly of NPs with oppositely charged 2D nanosheets to afford sandwich-like 0D/2D/0D *** barely covered surfaces and the advantageous architectures of such sandwich-like 0D/2D/0D heterostructures induce the desired synergistic effect,making them particularly suitable for electrochemical energy storage and *** demonstrate this by employing MXene/NiFe_(2)O_(4) and MXene/Fe3O4 heterostructures for high-performance electrocatalytic oxygen evolution and supercapacitors,respectively.

关键词： assembly heterostructures ligand-exchange MXene oxygen evolution supercapacitor

来源：评论

学校读者我要写书评

暂无评论

Recent Advances of Covalent Organic Frameworks in Chemical Sensing

引用

Chemical Research in Chinese Universities 2022年第2期38卷 339-349页

作者： XU Kai HUANG Ning Key Laboratory of Macromolecular Synthesis and Functionalization Ministry of EducationState Key Laboratory of Silicon MaterialsDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027P.R.China

With the rapid development of reticular chemistry,an increasing number of covalent organic frameworks(COFs)have been designed and synthesized over the past *** to the large surface areas,numerous active sites,and high chemical stability,recent effects gradually were made to investigate the interaction with various small *** the reported application areas,sensorics is an attractive field,where COFs have exhibited tremendous potential and acquired high-performance sensitivity and selectivity due to their structural *** this review,we highlighted the recent progress of COFs as sensors for the detection of various analytes,mainly depending on the analysis of change of fluorescence *** basic principles of physics for fluorescence-based sensors were briefly discussed for better understanding of the relationship between structures and functions of ***,we reviewed various classes of small molecule analytes that have been successfully detected by COFs,including explosives,gases,humidity,metal ions,pH,and biological *** this work,we detailedly discussed the components of COFs,functional sites,and sensing performance in each sensing application,aiming to disclose their intrinsic *** review also concluded with several issues to be solved and provided the outlook for the future development direction for practical applications.

关键词： Covalent organic framework(COF) Sensing Fluorescence Porous polymer

来源：评论

学校读者我要写书评

暂无评论

Ion Migration and Accumulation in Halide Perovskite Solar Cells

引用

Chinese Journal of Chemistry 2023年第7期41卷 861-876页

作者： Lijian Zuo Zexin Li Hongzheng Chen State Key Laboratory of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhouZhejiang310027 China Zhejiang University-Hangzhou Global Scientific and Technological Innovation Center HangzhouZhejiang310014 China

Comprehensive Summary The halide perovskite semiconductors-based solar cells(PVSCs)show great promise as next-generation renewable energy sources,with the merits of low cost,high performance,good flexibility,etc.A major difference distinguishing the perovskite semiconductors from others lies in their ionic *** intrinsic property induces“freely-moving”ions to migrate and accumulate in the perovskite films and devices under different external *** a charge carrier,these processes will strongly couple with the electronic process,and dramatically affect the performance and stability of *** review summarizes and discusses the recent progresses and fundamental understandings of ion migration and accumulation behaviors in ***,the basic principles of the general ion migration are ***,following the fundamental understandings,the critical factors,e.g.,ion migration activation energy,ion density,ion diffusion coefficient,etc.,are extracted to understand the ion migration and accumulation in perovskite ***,the principles governing ion accumulation behaviors under different external stresses are ***,the effect of ion migration and accumulation on band bending,and device performance is ***,we hope this review provides a tutorial and insightful perspective regarding the most prominent ionic feature of perovskite semiconductors and their application for photovoltaics.

关键词： Semiconductors Perovskite phases Crystal engineering Defects Photovoltaic

来源：评论

学校读者我要写书评

暂无评论

Core/shell magnetite/copolymer composite nanoparticles enabling highly stable magnetorheological response

引用

International Journal of Mechanical System Dynamics 2022年第2期2卷 155-164页

作者： Wenjiao Han Shun Wang Xiaoting Rui Yuzhen Dong Hyoungjin Choi School of Energy and Power Engineering Nanjing University of Science and TechnologyNanjingChina School of Materials Science and Engineering Harbin Institute of Technology at WeihaiWeihaiChina Department of Polymer Science and Engineering Inha UniversityIncheonRepublic of Korea Program of Environmental and Polymer Engineering College of EngineeringInha UniversityIncheonRepublic of Korea

Magnetorheological fluids(MRFs)have been successfully used in a variety of smart control systems,but are still limited due to their relatively poor settling ***,a core/shell‐structured Fe_(3)O_(4)/copolymer composite nanoparticle is synthesized as a new candidate material for stimulus‐responsive MRFs to tackle the limitation of the long‐term dispersion ***‐co‐diphenylamine copolymers(PANI‐co‐PDPA)are loaded onto the surface of Fe_(3)O_(4) nanoparticles,providing a lighter density and sufficient active interface for the dispersion of magnetic particles in the carrier *** features of the Fe_(3)O_(4)/copolymer composite nanoparticles,including morphology,compositional,and crystalline properties,are *** MRF is prepared by suspending Fe_(3)O_(4)/copolymer composite nanoparticles in a nonmagnetic medium oil,and its rheological properties are assessed using a controlled shear rate test and dynamic oscillation tests using a rotational *** models including the Bingham model and the Herschel–Bulkley model are fitted to the flow curves of the *** obtained Fe_(3)O_(4)/copolymer composite shows soft‐magnetic properties,as well as greater density adaptability and higher stability,compared to Fe_(3)O_(4).Moreover,the sedimentation testing provides information about the dispersion stability characteristics of MRF and shows a good correlation with high‐stability magnetorheological(MR)*** Fe_(3)O_(4)/copolymer‐based MRF with a tunable and instantaneous MR response is considered a promising material for smart control applications.

关键词： magnetorheological fluids core/shell dispersion stability copolymer magnetite

来源：评论

学校读者我要写书评

暂无评论

Chiral phonon-induced magnetization in cerium fluorides

Chiral phonon-induced magnetization in cerium fluorides

引用

CLEO: Fundamental science, CLEO:FS 2024 - Part of Conference on Lasers and Electro-Optics, CLEO 2024

作者： Luo, Jiaming Lin, Tong Zhang, Junjie Chen, Xiaotong Blackert, Elizabeth R. Xu, Rui Yakobson, Boris I. Zhu, Hanyu Department of Materials Science and Nano Engineering Rice University Houston United States Applied Physics Graduate Program Rice University Houston United States

We report that circularly polarized terahertz light pulses can drive chiral phonons, which then induce an effective quasi-static magnetic field on the order of 1 tesla to polarize the paramagnetic cerium fluoride. ... 详细信息

ISBN: (纸本)9781957171395

关键词： Phonons

来源：评论

学校读者我要写书评

暂无评论

Ultrafast dynamics of chiral phonons in tungsten disulfide

Ultrafast dynamics of chiral phonons in tungsten disulfide

引用

CLEO: Fundamental science, CLEO:FS 2024 - Part of Conference on Lasers and Electro-Optics, CLEO 2024

作者： Lin, Tong Chen, Xiaotong Xu, Rui Luo, Jiaming Zhu, Hanyu Department of Materials Science and Nano Engineering Rice University Houston United States Applied Physics Graduate Program Rice University Houston United States

Linearly and circularly polarized phonons in monolayer WS2 are directly excited by resonant infrared pulses. The dynamics of coherent and incoherent chiral phonons are measured by time-resolved Raman spectroscopy and ... 详细信息

ISBN: (纸本)9781957171395

关键词： Time-resolved spectroscopy

来源：评论

学校读者我要写书评

暂无评论

Silk Fibroin Nacre

引用

Advanced Fiber materials 2022年第5期4卷 1191-1208页

作者： Chenxi Zhao Yawen Liu Zhuochen Lv Leitao Cao Jing Ren Zhengzhong Shao Shengjie Ling School of Physical Science and Technology ShanghaiTech University393 Middle Huaxia RoadShanghai 201210China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceLaboratory of Advanced MaterialsFudan UniversityShanghai 200433China

Producing lightweight,mechanically strong,ductile,and biocompatible materials remains a significant challenge in material engineering due to the conflict between structural and mechanical *** by the“brick-and-mortar”structure of nacre,a construction with a naturally optimized structure-performance-function relationship,this study developed silk fibroin(SF)nacre as a silk protein-based nacre by integrating ice-templating and thermoplastic molding *** nacres are similar to natural nacre in microstructure,and their strength and toughness are even superior to natural *** mechani-cal properties permit machining by extreme processing techniques,such as ion beam ***,SF nacre can be used to modulate the polarization of laser beams and generate bright structural ***,mechanical robustness,good processability,and tunable coloration allow SF nacres to be used as a plastic replacement for structural engineering and biomedical use,showing promising advancement of such implantable devices towards clinical translation.

关键词： Silk fibroin Nacre Mechanical properties Optical modulation

来源：评论

学校读者我要写书评

暂无评论

Evaluation of temperature dependent vortex pinning properties in strongly pinned YBa_(2)Cu_(3)O_(7-δ)thin films with Y_(2)BaCuO_(5)nanoinclusions

引用

Superconductivity 2024年第1期9卷 95-105页

作者： Alok K.Jha Kaname Matsumoto Tomoya Horide Shrikant Saini Ataru Ichinose Paolo Mele Yutaka Yoshida Satoshi Awaji Department of Materials Science and Engineering Kyushu Institute of TechnologyTobata-kuKitakyushu 804-8550Japan Department of Mechanical and Control Engineering Kyushu Institute of TechnologyTobata-kuKitakyushu 804-8550Japan Central Research Institute of Electrical Power Industry YokosukaKanagawa 240-0196Japan College of Engineering-Innovative Global Program Shibaura Institute of TechnologyMinuma-kuSaitama 337-8570Japan Department of Energy Engineering and Science Nagoya UniversityChikusa-kuNagoya 464-8603Japan Institute for Materials Research Tohoku UniversityAoba-kuSendai 980-8577Japan

The pinning of quantized magnetic vortices in superconducting YBa_(2)Cu_(3)O_(7-δ)(YBCO or Y123)thin films with Y_(2)BaCuO_(5)(Y211)nanoinclusions have been investigated over wide temperature range(4.2-77 K).The concentration of Y211 nanoinclusions has been systematically varied inside YBCO thin films prepared by laser ablation technique using surface modified target *** pinning force density values(Fp∼0.5 TNm^(−3)at 4.2 K,9 T)have been observed for the YBCO film with moderate concentration of Y211 nanoinclusions(3.6 area%on ablation target).In addition,uniform enhancement in critical current density(J_(c))was observed in the angular dependent J_(c)measurement of YBCO+Y211 nanocomposite films.Y211 nanoinclusions have been found to be very efficient in pinning the quantized vortices thereby enhancing the in‐field J_(c)values over a wide range of *** the concentration of Y211 secondary phase into Y123 film matrix results into agglomeration of Y211 phase and observed as increased Y211 nanoparticle *** larger secondary phase nanoparticles are not as efficient pinning centers at lower temperatures as they are at higher temperatures due to substantial reduction of the coherence length at lower *** of the temperature dependence of J_(c)for YBCO+Y211 nanocomposite films has been conducted and possible vortex pinning mechanism in these nanocomposite films has been discussed.

关键词： YBCO thin film Critical current Vortex pinning Nanoscale APCs

来源：评论

学校读者我要写书评

暂无评论

Numerical Modeling of C45 Steel to Predict the Temperature Ranges for Activation of Dynamic Strain Aging at Different Strain Rates 8th

Numerical Modeling of C45 Steel to Predict the Temperature R...

引用

8th International Conference on Manufacturing, Material and Metallurgical engineering, ICMMME 2024

作者： Hassan, Arhum Abed, Farid Materials Science and Engineering Program College of Arts and Sciences American University of Sharjah Sharjah26666 United Arab Emirates Department of Civil Engineering American University of Sharjah Sharjah26666 United Arab Emirates

ISBN: (纸本)9783031782947

This work predicts the temperature ranges for dynamic strain aging (DSA) activation in C45 steel at various strain rates through constitutive modeling and finite element (FE) simulations. DSA is often defined by a sudden increase in a metal’s strength when subjected to specific combinations of strain rates and temperatures due to the interaction of the diffused solute atoms with dislocations, and there is currently no effective constitutive model in the literature that can explain DSA physically. The current study offers a modification to the Voyiadjis–Abed (VA) model, which is used to predict DSA activation in C45 steel, in order to address this limitation. The modified constitutive model considers the diffusion kinetics and concentration of solute atom along the dislocation cores. The developed model was able to capture the activation of DSA in C45 steel at strain rates of 0.0015/s-0.15/s and temperature ranges of 500 K-750 K, which was found to be caused by carbon solute atoms. Additionally, FE simulations were carried out in ABAQUS through subroutine coded as VUMAT to validate the modified VA model’s prediction abilities. The results obtained compare effectively with the available experimental data. By integrating physical and microstructural features, the modified constitutive VA model can effectively capture the increase in flow stress due to the activation of DSA. This enables further investigation and progress in understanding the behavior of metals under specified temperature and strain rate conditions. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Digital elevation model

来源：评论

学校读者我要写书评

暂无评论

AI for organic and polymer synthesis

引用

science China Chemistry 2024年第8期67卷 2461-2496页

作者： Xin Hong Qi Yang Kuangbiao Liao Jianfeng Pei Mao Chen Fanyang Mo Hua Lu Wen-Bin Zhang Haisen Zhou Jiaxiao Chen Lebin Su Shuo-Qing Zhang Siyuan Liu Xu Huang Yi-Zhou Sun Yuxiang Wang Zexi Zhang Zhunzhun Yu Sanzhong Luo Xue-Feng Fu Shu-Li You Center of Chemistry for Frontier Technologies Department of ChemistryZhejiang UniversityHangzhou 310027China Center of Basic Molecular Science Department of ChemistryTsinghua UniversityBeijing 100084China Guangzhou National Laboratory Guangzhou 510005China Center for Quantitative Biology Academy for Advanced Interdisciplinary StudiesPeking UniversityBeijing 100871China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200433China School of Materials Science and Engineering Peking UniversityBeijing 100871China Beijing National Laboratory for Molecular Sciences Center for Soft Matter Science and EngineeringKey Laboratory of Polymer Chemistry and Physics of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China AI for Science(AI4S)-Preferred Program Shenzhen Graduate SchoolPeking UniversityShenzhen 518055China State Key Laboratory of Chemical Biology Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200032China Department of Chemical Sciences National Natural Science Foundation of ChinaBeijing 100085China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

Recent years have witnessed the transformative impact from the integration of artificial intelligence with organic and polymer synthesis. This synergy offers innovative and intelligent solutions to a range of classic problems in synthetic chemistry. These exciting advancements include the prediction of molecular property, multi-step retrosynthetic pathway planning, elucidation of the structure-performance relationship of single-step transformation, establishment of the quantitative linkage between polymer structures and their functions, design and optimization of polymerization process, prediction of the structure and sequence of biological macromolecules, as well as automated and intelligent synthesis platforms. Chemists can now explore synthetic chemistry with unprecedented precision and efficiency, creating novel reactions, catalysts, and polymer materials under the datadriven paradigm. Despite these thrilling developments, the field of artificial intelligence(AI) synthetic chemistry is still in its infancy, facing challenges and limitations in terms of data openness, model interpretability, as well as software and hardware support. This review aims to provide an overview of the current progress, key challenges, and future development suggestions in the interdisciplinary field between AI and synthetic chemistry. It is hoped that this overview will offer readers a comprehensive understanding of this emerging field, inspiring and promoting further scientific research and development.

关键词： organic synthesis polymer synthesis machine learning prediction chemical database automated synthesis

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：