检索结果-南通市图书馆

Self-powered and bipolar photodetector based on a van der Waals metal-semiconductor junction:Graphene/WSe_(2)/Fe_(3)GeTe_(2) heterojunction

引用

Science China(Technological Sciences) 2022年第6期65卷 1263-1272页

作者： XU GuoLiang liu danmin LI JingZhen LI JingJie YE ShuaiShuai Key Laboratory of Advanced Functional Materials Ministry of EducationFaculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Key Laboratory of Optoelectronics Technology College of MicroelectronicsFaculty of Information TechnologyBeijing University of TechnologyBeijing 100124China

A self-driven photosensor with signal-reversal response has the potential to work as a photodetector in complex environments with multiple signals owing to better signal recognition and enhanced signal-processing ***,a metal-semiconductor-metal photodetector based on ambipolar WSe_(2) with two electrodes comprising two-dimensional(2 D) van der Waals(vdWs) metal Fe_(3)GeTe_(2) and semimetal graphene was proposed to form an asymmetrical metal-contacted architecture with different Schottky barrier *** regulating gate field-induced Fermi level shift in WSe_(2) can be used to manipulate the WSe_(2) channel’s carrier type,resulting in a polarity-reversible photodetector without a bias ***,the photovoltaic effect can be observed from wavelengths of 450 nm(visible) to 850 nm(infrared) without external *** large open voltage is -0.177 V and short-circuit current is 17 nA under a 650-nm excitation *** reported WSe_(2)-based photodetector exhibits excellent properties under zero bias,including a large photo-to-dark current ratio greater than 10^(6) with dark current less than 1 fA,photovoltaic performance with an external quantum efficiency of 27.14%,an excellent detectivity of 3.4×10^(10) Jones,and a high responsivity of 116.38 mA/*** electron transfer occurs at the interface between WSe_(2) and vd Ws electrodes,resulting in a 370-μs response speed owing to the clean and nondestructive interfaces between vd Ws metals and WSe_(2).This study demonstrates the wide application prospect of the vd Ws metal Fe_(3)GeTe_(2) as an electrode forming a Schottky junction for realizing a photodetector without an external voltage and accelerates the development of 2 D photosensors with various working modes.

关键词： photodetector zero-biased WSe_(2) polarity-reversible van der Waals electrodes

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Vertical 3D Nanostructures Boost Efficient Hydrogen Production Coupled with Glycerol Oxidation Under Alkaline Conditions

引用

Nano-Micro Letters 2023年第10期15卷 609-621页

作者： Shanlin Li danmin liu Guowei Wang Peijie Ma Xunlu Wang Jiacheng Wang Ruguang Ma Key Laboratory of Advanced Functional Materials Ministry of EducationFaculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124People’s Republic of China The State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China School of Materials Science and Engineering Suzhou University of Science and Technology99 Xuefu RoadSuzhou 215011People’s Republic of China School of Materials Science and Engineering Taizhou UniversityTaizhou 318000People’s Republic of China Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials College of Materials Science and EngineeringNorth China University of Science and TechnologyTanshang 063210People’s Republic of China

Hydrogen production from electrolytic water is an important sustainable technology to realize renewable energy conversion and carbon ***,it is limited by the high overpotential of oxygen evolution reaction(OER)at the *** reduce the operating voltage of electrolyzer,herein thermodynamically favorable glycerol oxidation reaction(GOR)is proposed to replace the ***,vertical Ni O flakes and NiMoNH nanopillars are developed to boost the reaction kinetics of anodic GOR and cathodic hydrogen evolution,***,excluding the explosion risk of mixed H_2/O_(2),a cheap organic membrane is used to replace the expensive anion exchange membrane in the ***,the electrolyzer delivers a remarkable reduction of operation voltage by 280 mV,and exhibits good long-term *** work provides a new paradigm of hydrogen production with low cost and good feasibility.

关键词： Hydrogen evolution reaction Glycerol oxidation reaction Oxygen evolution reaction Flow cell Nanostructure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Binary-ternary transition metal chalcogenides interlayer coupling in van der Waals type-II heterostructure for visible-infrared photodetector with efficient suppression dark currents

引用

Nano Research 2022年第3期15卷 2689-2696页

作者： Guoliang Xu danmin liu Songyu Li Yi Wu Zhenlu Zhang Shaobo Wang Zikun Huang Yongzhe Zhang Key Laboratory of Advanced Functional Materials Ministry of EducationFaculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China School of Physics and Nuclear Energy Engineering Beihang UniversityBeijing 100083China School of Science Beijing University of Posts and TelecommunicationsBeijing 100876China Key Laboratory of Optoelectronics Technology Ministry of EducationFaculty of Information TechnologyBeijing University of TechnologyBeijing 100124China

Ternary two-dimentional(2D)materials exhibit diverse physical properties depending on their composition,structure,and *** forming heterostructures with other binary materials that show similar structure,there can be numerous potential applications of these ternary 2D *** this work,we reported the structure of few-layer CrPS_(4)by X-ray diffraction,transmission electron microscope,and electron-density distribution *** also demonstrated a new application of the CrPS_(4)/MoS_(2)heterobilayer:visible-infrared photodetectors with type-II staggered band alignment at room *** response of the heterostructure to infrared light results from a strong interlayer coupling that reduces the energy interval in the junction *** the intrinsic bandgap of individual components determines wavelengths,the decrease in energy interval allows better detection of light that has a longer *** used photoluminescence(PL)spectroscopy,Kelvin probe force microscopy(KPFM)under illumination,and electrical transport measurements to verify the photoinduced charge separation between the CrPS_(4)/MoS_(2)*** forward bias,the device functioned as a highly sensitive photodetector,as the wavelength-dependent photocurrent measurement achieved the observation of optical excitation from 532 to 1,450 nm ***,the photocurrent caused by interlayer exciton reached around 1.2 nA at 1,095 nm *** demonstration of the strong interlayer coupling in the CrPS_(4)/MoS_(2)heterostructure may further the understanding of the essential physics behind binary-ternary transition metal chalcogenides heterostructure and pave a way for their potential applications in visible-infrared devices.

关键词： heterostructure MoS_(2) CrPS_(4) interlayer transition visible-infrared photodetector type-II band alignment

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Atomic pair distribution function research on Li_2MnO_3 electrode structure evolution

引用

Science Bulletin 2019年第8期64卷 553-561页

作者： Yubo Yang Heng Su Tianhao Wu Yuyuan Jiang danmin liu Pengfei Yan Haolai Tian Haijun Yu College of Materials Science and Engineering Key Laboratory of Advanced Functional Materials Ministry of Education Beijing University of Technology Institute of Solid State Microstructure and Properties Beijing Key Laboratory of Microstructure and Property of Advanced Materials Beijing University of Technology China Spallation Neutron Source Dongguan Institute of Neutron Science Institute of High Energy of Physics Chinese Academy of Sciences

The mechanism research of structure-related reactions on Li_2MnO_3 is important to enhance the electrochemical performance of lithium-manganese-rich layered *** there are some reports on the structure evolution of Li_2MnO_3 during cycling process,the employed research techniques are very limited,mainly in/ex-situ X-ray diffraction,X-ray absorption and transmission electron ***,atomic pair distribution function,a method to study the local atomic arrangement on the basis of average spectroscopic information,is used for the first time to study the local structure evolution of Li_2MnO_3 during electrochemical charge/discharge *** results clearly demonstrate that Mn^(3+)/Mn^(4+) redox couple is activated and Mn ions are reduced during discharging *** Mn ions in Mn layers can significantly migrate to Li layers and occupy the octahedral *** a result,a portion of inserted Li ions can occupy the face-shared tetrahedron sites,accompanied by the formation of local spinel-like *** work provides an important and suitable method based on the average spectroscopic information to investigate the local structure of electrode materials of lithium-ion batteries as well as other advanced battery systems.

关键词： Li-ion battery Lithium-manganese-rich layered oxides Local structure Pair distribution function Structure evolution

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Gate regulated near-infrared photodetector utilizing interlayer excitons for MoS2/CrPS4 heterojunction

引用

Science China(Information Sciences) 2024年第3期67卷 315-316页

作者： Guoliang XU Chao HE Donghong SHI danmin liu Wenjie DENG Jingzhen LI Xingtao AN Yongzhe ZHANG Hebei Provincial Key Laboratory of Photoelectric Control on Surface and Interface College of ScienceHebei University of Science and Technology Key Laboratory of Advanced Functional Materials Ministry of EducationFaculty of Materials and ManufacturingBeijing University of Technology Key Laboratory of Optoelectronics Technology Ministry of EducationFaculty of Information TechnologyBeijing University of Technology

Excitons play an important role as interconnect in the optical and optoelectronic response and have attracted much attention for understanding the physical matters behind excitons [1, 2]. Excitons in atomically thin transition metal dichalcogenides semiconductors(TMDs) often trap an electron(X-) or a hole(X+) to form so-called trions,

关键词： Excitons

来源：

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

EFFECT OF La_2O_3 ON THE RECRYSTALLIZATION OF MOLYBDENUM WIRES

引用

Acta Metallurgica Sinica(English Letters) 1996年第2期9卷 94-98页

作者： ZHANG Jiuxing ZHOU Meiling liu danmin ZUO Tieyong(Department of Materials Science and Engineering,Beijing Polytechnic University,Beijing 100022,China) Beijing Polytechnic Univ Beijing China

The recrystallization behavior of Mo wires doped with various contents of La2O3,which were prepared by powder metallurgy method,was investigated using TEM and SEM in *** is shown that the recrystallization temperature and recrystallized microstructure of Mo-La2O3 wires are strongly dependent on the La2O3 *** interlocked large grain structure is formed in Mo-La2O3 wires with contents of 0.2-0.4 wt% La2O3,on the other hand,Mo─La2O3 wires containing less than 0.1 or more than 0.8 wt% La2O3 show equiaxed grain *** reason for this is the difference between the longitudinal interparticle spacing and the transverse spacing of La2O3 particles in various Mo-La2O3 wires,which was observed by using TEM.

关键词： molybdenum wire La_2O_3 recrystallization

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Surface Carbonization of Mo La_2O_3 Cathode

引用

中国有色金属学会会刊：英文版 1999年第3期9卷 442-445页

作者： Nie Zuoren(聂祚仁), Zuo Tieyong(左铁镛), Zhou Meiling(周美玲), liu danmin(刘丹敏), Wang Jinshu(王金淑) School of Materials Science and Engineering, Beijing Polytechnic University, Beijing 100022, P.R. China Beijing Polytech Univ Sch Mat Sci & Engn Beijing 100022 Peoples R China

The carbonized structures of Mo La 2O 3 cathode specimens have been investigated by means of FESEM and XRD, respectively. The substructure of carbonized layer in the Mo La 2O 3 cathode has been found for the first time. The results showed that the carbonized layer with uniform Mo 2C was helpful to emission, while the demixing carbonized layer with a compact MoC outside layer was harmful to emission. The uniform Mo 2C layer consists of coarse particles with lots of grain boundary crevices as well as holes arranging perpendicular to the wire axle and up to surface, which was beneficial to the migration of activated rare earth in activation and operating.

关键词： microstructure cathodes Mo La 2O 3 carbonization emissionDocument code:A

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

掺杂和复合稀土六硼化物的研究进展

引用

北京工业大学学报 2022年第8期48卷 869-877页

作者：刘丹敏石峰北京工业大学材料与制造学部北京100124

稀土六硼化物(rare earth hexaboride,REB_(6))作为热电子发射阴极材料已经应用于各种电子发射器件中,技术的发展对REB_(6)单晶阴极材料的电子发射和力学性能提出了更高的要求.掺杂稀土元素能改善发射性能,加入过渡族金属二硼化物(trans... 详细信息

稀土六硼化物(rare earth hexaboride,REB_(6))作为热电子发射阴极材料已经应用于各种电子发射器件中,技术的发展对REB_(6)单晶阴极材料的电子发射和力学性能提出了更高的要求.掺杂稀土元素能改善发射性能,加入过渡族金属二硼化物(transition metal boride,TMB_(2))形成共晶复合材料可以提高力学性能.采用区域熔炼法制备的掺杂REB_(6)单晶和REB_(6)与TMB_(2)定向凝固共晶复合材料都是极具应用前景的大尺寸阴极材料.首先,总结了二元REB_(6)的晶体结构和热发射性能,包括晶体取向和稀土元素对REB_(6)单晶热发射性能的影响.然后,综述了掺杂和复合REB_(6)的研究进展,重点总结了材料的性能,从实验和计算结果出发探讨了影响性能的因素.

关键词：稀土六硼化物稀土元素掺杂定向凝固共晶复合材料热电子发射性能阴极材料

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

放电等离子固相烧结制备高密度LaB_6阴极性能

引用

强激光与粒子束 2010年第1期22卷 171-175页

作者：周身林张久兴刘丹敏北京工业大学材料学院新型功能材料教育部重点实验室北京100124

采用放电等离子烧结(SPS)技术,以碳化硼还原法制备的LaB6粉末为原料,制备了高致密LaB6多晶块体阴极,并系统研究了烧结温度、压力对LaB6烧结样品的物相、结构和性能的影响。确定了SPS烧结LaB6的最佳工艺为:压力50MPa,烧结温度1650℃,保... 详细信息

采用放电等离子烧结(SPS)技术,以碳化硼还原法制备的LaB6粉末为原料,制备了高致密LaB6多晶块体阴极,并系统研究了烧结温度、压力对LaB6烧结样品的物相、结构和性能的影响。确定了SPS烧结LaB6的最佳工艺为:压力50MPa,烧结温度1650℃,保温时间10min。实验结果表明:与其它LaB6多晶制备方法相比,SPS制备得到的LaB6烧结块体的力学及发射性能均有大幅提高,样品相对密度达到96.2%,维氏硬度达到1720kg/mm2,抗弯强度达到203.2MPa。样品在1520℃温度下发射电流密度达到17.41A/cm2,功函数为2.40eV。SPS制备法显著降低了LaB的烧结温度,缩短了烧结时间。

关键词：放电等离子烧结 LaB阴极力学性能发射性能

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

低合金钢中钒含量与珠光体量关系的研究

引用

钢铁 1989年第10期24卷 49-52页

作者：杨国涛刘丹敏中南工业大学

本文研究了含钒低合金钢中珠光体量(V_π％)与钒含量(N％)的关系,建立了适用于普通含钒低合金钢的V_π％与N％的关系方程: V_π/V％=K·ρ_(sγ)/ρ_π(C_s％-0.02％)·[C％-12/51n(N％-Ns％)-0.02％]利用该方程从本文的V_π％实验结果... 详细信息

本文研究了含钒低合金钢中珠光体量(V_π％)与钒含量(N％)的关系,建立了适用于普通含钒低合金钢的V_π％与N％的关系方程: V_π/V％=K·ρ_(sγ)/ρ_π(C_s％-0.02％)·[C％-12/51n(N％-Ns％)-0.02％]利用该方程从本文的V_π％实验结果分析了钒在低合金钢中的状态。

关键词：低合金钢钒含量珠光体量

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

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：