检索结果-内蒙古大学图书馆

Space-confined vapor deposited molecular ferroelectric film for photovoltaic devices

Nano Research 2025年第3期18卷 611-618页

作者： Chen Wang Shan Cong Lingbo Xiao Chao-ran Huang Ruonan Wang Ruijie Li Lutao Li Guifu Zou Qiang Zhang College of Mechanical and Electronic Engineering Shandong University of Science and TechnologyQingdao 266590China College of Energy Soochow Institute for Energy and Materials Innovationsand Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou 215000China Department of Applied Physics Zhejiang University of Science and TechnologyHangzhou 310023China School of Advanced Energy Sun Yat-sen UniversityShenzhen 518107China

Molecular ferroelectrics,characterized by outstanding photoelectric and unique ferroelectric properties,invigorate the field of ferroelectric ***,the performance of molecular ferroelectric devices is hindered by fine grains resulting from poor high-temperature *** this work,we successfully achieved micron-grained molecular ferroelectric films by using the space-confined vapor deposited *** optimized film exhibited a significant increase in grain size from the nanometer level(0.08μm)to the micrometer level(~2μm),leading to improved optoelectronic and ***,it optimizes the energy level and enhances the photovoltaic performance of vertical *** on the mechanism shows that high annealing temperature and inhibiting component loss play an important role in obtaining large grain *** work provides new research ideas for improving the quality of molecular ferroelectric films and provides valuable reference for the fabrication of high performance molecular ferroelectric photovoltaic devices.

关键词： molecular ferroelectric large grain space confinement photovoltaic devices

来源：评论

学校读者我要写书评

暂无评论

Engineering strong spin-frustration at the surface of three-dimensional graphene

引用

science Bulletin 2024年第18期69卷 2816-2819页

作者： Wenjing Li Ken Chen Menglei Li Huiying Gao Jize Zhao Fawei Zheng Wenhui Duan Center for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(MOE)School of PhysicsBeijing Institute of TechnologyBeijing 100081China Beijing Key Lab of Nanophotonics&Ultrafine Optoelectronic Systems School of PhysicsBeijing Institute of TechnologyBeijing 100081China School of Physical Science and Technology Key Laboratory of Quantum Theory and Applications of MOELanzhou UniversityLanzhou 730000China Lanzhou Center for Theoretical Physics Key Laboratory of Theoretical Physics of Gansu ProvinceLanzhou UniversityLanzhou 730000China Department of Physics Capital Normal UniversityBeijing 100048China State Key Laboratory of Low Dimensional Quantum Physics Department of PhysicsTsinghua UniversityBeijing 100084China Institute for Advanced Study Tsinghua UniversityBeijing 100084China Frontier Science Center for Quantum Information Beijing 100084China Beijing Academy of Quantum Information Sciences Beijing 100193China

Since the first successful fabrication in 2004[1],graphene has received tremendous attention due to its extremely simple atomic structure and alluring physical *** example,its massless low energy excitations have a linear dispersion and thus its transport property is governed by Dirac equation instead of Schr?dinger *** special electronic structures suppress the intra-valley and inter-valley backscatterings,leading to the half-integer and fractional quantum Hall effect[2]under magnetic field and the relativistic quantum tunneling described by the Klein paradox[3].

关键词： properties equation quantum

来源：评论

学校读者我要写书评

暂无评论

Experimental determination of the Young’s modulus of individual single-walled carbon nanotubes with single chirality

引用

Nano Research 2024年第8期17卷 7522-7532页

作者： Jianlin Sun Xiao Zhang Yanchun Wang Mingming Li Xiaojun Wei Huaping Liu Weiya Zhou Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences and College of Materials Science and Optoelectronic Technology University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China Beijing Key Laboratory for Advanced Functional Materials and Structure Research Beijing 100190China

One-dimensional carbon nanotube(CNT)exhibits excellent mechanical properties and is considered to be an ideal candidate material for the space ***,subtle changes in its chirality strongly affect its physical and chemical properties,including mechanical properties(such as Young's modulus,YM).Theoretical studies reveal that the YMs of perfect single-walled carbon nanotubes(SWCNTs)are in the order of TPa and related to their ***,due to the lack of SWCNTs samples with well-defined structures and the difficulties in mechanical tests on individual SWCNTs,the theoretical correlations between YM and structure of SWCNTs have not been verified and are still in debate,which directly influences the practical utilization of the excellent mechanical properties of *** this work,we have developed an experimental method to measure the YM of an individual micrometer-scale suspended CNT by atomic force microscopy.A distinct regularity is found between the YM and chirality(i.e.,chiral angle and diameter)of SWCNT in the experiment for the first *** comparing the YMs of SWCNTs with similar diameters and different chiral angles,it manifests that the SWCNT with a near zigzag configuration has a larger *** finding suggests that the effect of SWCNT’s structures on the YMs cannot be *** developed method of measuring YMs of SWCNTs will be valuable for further experimental research on the inherent physical and chemical properties of SWCNTs.

关键词： Young's modulus single-walled carbon nanotubes single chirality atomic force microscopy

来源：评论

学校读者我要写书评

暂无评论

Interpretable Machine Learning-Assisted High-Throughput Screening for Understanding NRR Electrocatalyst Performance Modulation between Active Center and C-N Coordination

引用

Energy & Environmental Materials 2024年第5期7卷 263-271页

作者： Jinxin Sun Anjie Chen Junming Guan Ying Han Yongjun Liu Xianghong Niu Maoshuai He Li Shi Jinlan Wang Xiuyun Zhang College of Physics Science and Technology Yangzhou UniversityYangzhou 225002China State Key Laboratory of Organic Electronics and Information Displays(KLOEID)&Institute of Advanced Materials(IAM) School of ScienceNanjing University of Posts and TelecommunicationsNanjing 210023China College of Chemistry and Molecular Engineering Qingdao University of Science and TechnologyQingdao 266042China School of Physics&Key Laboratory of Quantum Materials and Devices Ministry of EducationSoutheast UniversityNanjing 20089China

Understanding the correlation between the fundamental descriptors and catalytic performance is meaningful to guide the design of high-performance electrochemical ***,exploring key factors that affect catalytic performance in the vast catalyst space remains challenging for ***,to accurately identify the factors that affect the performance of N2 reduction,we apply interpretable machine learning(ML)to analyze high-throughput screening results,which is also suited to other surface reactions in *** expound on the paradigm,33 promising catalysts are screened from 168 carbon-supported candidates,specifically single-atom catalysts(SACs)supported by a BC_(3)monolayer(TM@V_(B/C)-N_(n)=_(0-3)-BC_(3))via high-throughput ***,the hybrid sampling method and XGBoost model are selected to classify eligible and non-eligible *** feature interpretation using Shapley Additive Explanations(SHAP)analysis,two crucial features,that is,the number of valence electrons(N_(v))and nitrogen substitution(N_(n)),are screened *** SHAP analysis and electronic structure calculations,the synergistic effect between an active center with low valence electron numbers and reasonable C-N coordination(a medium fraction of nitrogen substitution)can exhibit high catalytic ***,six superior catalysts with a limiting potential lower than-0.4 V are *** workflow offers a rational approach to obtaining key information on catalytic performance from high-throughput screening results to design efficient catalysts that can be applied to other materials and reactions.

关键词： electrochemical nitrogen reduction feature engineering high-throughput screening machine learning

来源：评论

学校读者我要写书评

暂无评论

Transport features of topological corner states in honeycomb lattice with multihollow structure

引用

Frontiers of physics 2022年第4期17卷 83-89页

作者： Kai-Tong Wang Fuming Xu Bin Wang Yunjin Yu Yadong Wei School of Physics and Engineering Henan University of Science and TechnologyLuoyang 471023China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China

Higher-order topological phase in 2-dimensional(2D)systems is characterized by in-gap corner states,which are hard to detect and *** numerically investigate transport properties of topological corner states in 2D honeycomb lattice,where the second-order topological phase is induced by an in-plane Zeeman field in the conventional Kane–Mele *** engineering multihollow structures with appropriate boundaries in honeycomb lattice,multiple corner states emerge,which greatly increases the probability to observe them.A typical two-probe setup is built to study the transport features of a diamond-shaped system with multihollow *** results reveal the existence of global resonant states in bulk insulator,which corresponds to the resonant tunneling of multiple corner states and occupies the entire scattering ***,based on the well separated energy levels of multiple corner states,a single-electron source is constructed.

关键词： second-order topological insulator Kane–Mele model global resonant state single-electron source

来源：评论

学校读者我要写书评

暂无评论

Van der Waals materials-based floating gate memory for neuromorphic computing

引用

Chip 2023年第4期2卷 27-44页

作者： Qianyu Zhang Zirui Zhang Ce Li Renjing Xu Dongliang Yang Linfeng Sun Centre for Quantum Physics Key Laboratory of Advanced Optoelectronic Quan-tum Architecture and Measurement(MOE)School of PhysicsBeijing Institute of TechnologyBeijing 100081China Beijing Key Lab of Nanophotonics&Ultra-fine Optoelectronic Systems School of PhysicsBeijing Institute of TechnologyBeijing 100081China Thrust of Microelectronics of Function Hub The Hong Kong University of Science and Technology(Guangzhou)Guangzhou 511400China

With the advent of the“Big Data Era”,improving data storage density and computation speed has become more and more urgent due to the rapid growth in different types of *** memory with a floating gate(FG)structure is attracting great attention owing to its advantages of miniaturization,low power consumption and reli-able data storage,which is very effective in solving the problems of large data capacity and high integration ***,the FG memory with charge storage principle can simulate synaptic plasticity perfectly,breaking the traditional von Neumann computing ar-chitecture and can be used as an artificial synapse for neuromorphic computations inspired by the human *** many candidate materials for manufacturing devices,van der Waals(vdW)materials have attracted widespread attention due to their atomic thickness,high mobility,and sustainable miniaturization *** to the arbitrary stacking ability,vdW heterostructure combines rich physics and potential 3D integration,opening up various possibilities for new functional integrated devices with low power consumption and flexible *** paper provides a comprehensive review of memory devices based on vdW materials with FG structure,including the working principles and typical structures of FG structure devices,with a focus on the introduction of various highperformance FG memories and their versatile applications in neuro-morphic ***,the challenges of neuromorphic devices based on FG structures are also *** review will shed light on the design and fabrication of vdW material-based memory devices with FG engineering,helping to promote the development of practical and promising neuromorphic computing.

关键词： Van der Waals materials Floating gate memory Memristor Neuromorphic computing

来源：评论

学校读者我要写书评

暂无评论

SnS_(2) nanosheets decorated SnO_(2) hollow multishelled nanostructures for enhanced sensing of triethylamine gas

引用

Rare Metals 2024年第5期43卷 2339-2348页

作者： Wen-Di Liu Ya Xiong Ao Shen Xin-Zhen Wang Xiao Chang Wen-Bo Lu Jian Tian School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao 266590China College of Physics Qingdao UniversityQingdao 266071China Zernike Institute for Advanced Materials University of Groningen9747 AG GroningenThe Netherlands

Highly sensitive,fast and low-temperature detection of triethylamine(TEA)gas based on SnO_(2) is attractive yet remains ***,SnS_(2) nanosheets(NSs)/SnO_(2) hollow multishelled structures(HoMSs)-based sensors are designed by the synthesis of SnO_(2) HoMSs,followed by in situ sulfuration with *** varying the thioacetamide levels,Sn S_(2)/SnO_(2) heterostructures with different SnS_(2) contents were obtained and their TEA gas sensing performances were investigated.

关键词： SnS attractive sheets

来源：评论

学校读者我要写书评

暂无评论

Direct measurement of the break-out ^(19)F(p,γ)^(20)Ne reaction in the China Jinping underground laboratory(CJPL)

引用

Nuclear science and Techniques 2024年第8期35卷 142-152页

作者： Yin‑Ji Chen Hao Zhang Li‑Yong Zhang Jian‑Jun He Richard James deBoer Michael Wiescher Alexander Heger David Kahl Jun Su Daniel Odell Xin‑Yue Li Jian‑Guo Wang Long Zhang Fu‑Qiang Cao Zhi‑Cheng Zhang Xin‑Zhi Jiang Luo‑Huan Wang Zi‑Ming Li Lu‑Yang Song Liang‑Ting Sun Qi Wu Jia‑Qing Li Bao‑Qun Cui Li‑Hua Chen Rui‑Gang Ma Er‑Tao Li Gang Lian Yao‑De Sheng Zhi‑Hong Li Bing Guo Wei‑Ping Liu Key Laboratory of Beam Technology of the Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Department of Physics and Astronomy The Joint Institute for Nuclear AstrophysicsUniversity of Notre DameNotre DameIN 46556USA School of Physics and Astronomy Monash UniversityClaytonVIC 3800Australia Facility for Rare Isotope Beams Michigan State UniversityEast LansingMI 48824USA Institute of Nuclear and Particle Physics and Department of Physics and Astronomy Ohio UniversityAthensOH 45701USA Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China China Institute of Atomic Energy Beijing 102413China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China College of Science Southern University of Science and TechnologyShenzhen 518055China Institute of Radiation Technology Beijing Academy of Science and TechnologyBeijing 100875China Key Laboratory of Nuclear Physics and Ion‑Beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of Mathematics and Physics Handan UniversityHandan 056005China

Calcium production and the stellar evolution of first-generation stars remain fascinating mysteries in *** one possible nucleosynthesis scenario,break-out from the hot carbon–nitrogen–oxygen(HCNO)cycle was thought to be the source of the calcium observed in these oldest ***,according to the stellar modeling,a nearly tenfold increase in the thermonuclear rate ratio of the break-out ^(19)F(p,γ)^(20) Ne reaction with respect to the competing ^(19)F(p,α)^(16) O back-processing reaction is required to reproduce the observed calcium *** performed a direct measurement of this break-out reaction at the China Jinping underground *** measurement was performed down to the low-energy limit of E_(c.m.)=186 keV in the center-of-mass *** key resonance was observed at 225.2 keV for the first *** a temperature of approximately 0.1 GK,this new resonance enhanced the thermonuclear ^(19)F(p,γ)^(20) Ne rate by up to a factor of≈7.4,compared with the previously recommended NACRE *** is of particular interest to the study of the evolution of the first stars and implies a stronger breakdown in their“warm”CNO cycle through the ^(19)F(p,γ)^(20) Ne reaction than previously *** break-out resulted in the production of the calcium observed in the oldest stars,enhancing our understanding of the evolution of the first stars.

关键词： Nuclear astrophysics First stars Abundance of calcium Reaction cross section Reaction rate China Jinping underground laboratory(CJPL) JUNA

来源：评论

学校读者我要写书评

暂无评论

Photoemission evidence of a novel charge order in kagome metal FeGe

引用

science China(physics,Mechanics & Astronomy) 2025年第6期68卷 172-178页

作者： Zhisheng Zhao Tongrui Li Peng Li Xueliang Wu Jianghao Yao Ziyuan Chen Yajun Yan Shengtao Cui Zhe Sun Yichen Yang Zhicheng Jiang Zhengtai Liu Alex Louat Timur Kim Cephise Cacho Aifeng Wang Yilin Wang Dawei Shen Juan Jiang * and Donglai Feng Department of Physics School of Emerging TechnologyUniversity of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China National Synchrotron Radiation Laboratory School of Nuclear Science and TechnologyUniversity of Science and Technology of ChinaHefei 230026China Low Temperature Physics Laboratory College of Physics and Center of Quantum Materials and DevicesChongqing UniversityChongqing 401331China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology(SIMIT)Chinese Academy of SciencesShanghai 200050China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China Diamond Light Source Ltd. Harwell Science and Innovation CampusDidcot OX110DEUK New Cornerstone Science Laboratory University of Science and Technology of ChinaHefei 230026China

The kagome metal FeGe provides a rich platform for understanding the mechanisms behind competing orders,as it exhibits charge order(CO)emerging deep within the antiferromagnetic *** investigate the intrinsic origin of this behavior,we examine the evolution of the low-energy electronic structure across the phase transition in annealed FeGe samples using angleresolved photoemission *** find no evidence supporting a conventional nesting mechanism,such as Fermi surface nesting or van Hove ***,we observe two notable changes in the band structure:an electron-like band around the K point and another around the A point,both shifting upward in energy when CO *** findings are consistent with our density-functional theory calculations,which suggest that the charge order in FeGe is primarily driven by magnetic energy savings due to a lattice distortion involving *** results provide photoemission evidence supporting this novel mechanism for CO formation in FeGe,in contrast to the conventional nesting-driven mechanisms.

关键词： kagome metal charge order electronic structure angle-resolved photoemission spectroscopy

来源：评论

学校读者我要写书评

暂无评论

Degenerate polarization entangled photon source based on a single Ti-diffusion lithium niobate waveguide in a polarization Sagnac interferometer

引用

Chinese physics B 2023年第8期32卷 69-73页

作者：孙宇孙昌伟周唯杨然端家晨龚彦晓徐平祝世宁 National Laboratory of Solid State Microstructures and School of Physics Nanjing UniversityNanjing 210093China NanZhi Institude of Advanced Optoelectronic Integration Nanjing 210018China Institute for Quantum Information and State Key Laboratory of High Performance Computing College of Computer Science and TechnologyNational University of Defense TechnologyChangsha 410073China

Combining a Ti-diffusion periodically poled lithium niobate(PPLN)waveguide with a Sagnac interferometer,two opposite directions type-II spontaneous parametric down conversions(SPDC)occur coherently and yield a high brightness,high stability polarization entanglement *** source produces degenerate photon pairs at 1540.4 nm with a brightness of B=(1.36±0.03)×10^(6) pairs/(s·nm·m W).We perform quantum state tomography to reconstruct the density matrix of the output state and obtain a fidelity of F=0.983±*** high brightness and phase stability of our waveguide source enable a wide range of quantum information experiments operating at a low pump power as well as hold the advantage in mass production which can promote the practical applications of quantum technologies.

关键词： polarization entanglement source Sagnac interferometer quantum information lithium niobate waveguide

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：