期刊文献+
共找到24篇文章
< 1 2 >
每页显示 20 50 100
The Effect of Simulated Transportation Conditions on the Chemical, Physical and Sensory Profiles of Mailler-Thurgau and Scheurebe Wines
1
作者 Molly Crandles Martha Wicks-Mfiller +1 位作者 Christoph Schuessler Rainer Jung 《Journal of Food Science and Engineering》 2016年第4期177-196,共20页
The impact of different phases of shipment (at sea and at port) on two German white wines of two vintages and the lasting effects of the temperature regimes over time was investigated. The wines were subjected to th... The impact of different phases of shipment (at sea and at port) on two German white wines of two vintages and the lasting effects of the temperature regimes over time was investigated. The wines were subjected to three temperature programs--control (15 ℃), linear increase (15℃ steadily increasing to 45 ℃), and diurnal fluctuation (15 ℃/40 ℃)--in both movement and non-movement conditions. The wines were analyzed for chemical, physical and sensorial changes at one and eight months post-treatment. Changes in temperature and pressure were recorded within the bottles, which correlated with the temperature programs: +0.04 bar/℃ in the linear increase program and +0.08 bar/℃ in the diurnal fluctuation program. The oxygen levels in the headspace and in the wine were monitored during all of the treatments. The oxygen development in the bottles was similar between the diurnal and linear programs, and was found to be distinctive from the control program. The chemical analysis revealed that there were significant differences related to the experimental treatments of the wines for the following parameters: tartaric acid, free sulfur dioxide, total sulfur dioxide and percent cork weight loss measurements. Difference sensory testing found very few differences. After eight months storage, significant differences were found in the Diurnal Non-movement treatment compared to Linear Non-movement and control treatments, as well as Diurnal Movement and Control treatments for the 2014 Miiller-Thurgau wine. Sensory descriptive analysis of the wines found that the wines could be differentiated by variety, but could not be distinguished according to experimental treatment after one month storage. These results indicate that wines of these types are more robust to shipping conditions than previously found. 展开更多
关键词 simulated transportation conditions Scheurebe Mtiller-Thurgau OXYGEN descriptive analysis.
下载PDF
Sample size adaptive strategy for time-dependent Monte Carlo particle transport simulation 被引量:3
2
作者 Dan-Hua ShangGuan Wei-Hua Yan +3 位作者 Jun-Xia Wei Zhi-Ming Gao Yi-Bing Chen Zhi-Cheng Ji 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2023年第4期127-134,共8页
When multiphysics coupling calculations contain time-dependent Monte Carlo particle transport simulations, these simulations often account for the largest part of the calculation time, which is insufferable in certain... When multiphysics coupling calculations contain time-dependent Monte Carlo particle transport simulations, these simulations often account for the largest part of the calculation time, which is insufferable in certain important cases. This study proposes an adaptive strategy for automatically adjusting the sample size to fulfil more reasonable simulations. This is realized based on an extension of the Shannon entropy concept and is essentially different from the popular methods in timeindependent Monte Carlo particle transport simulations, such as controlling the sample size according to the relative error of a target tally or by experience. The results of the two models show that this strategy can yield almost similar results while significantly reducing the calculation time. Considering the efficiency, the sample size should not be increased blindly if the efficiency cannot be enhanced further. The strategy proposed herein satisfies this requirement. 展开更多
关键词 Time-dependent Monte Carlo particle transport simulation Shannon entropy Adaptive strategy
下载PDF
Study on the adsorption of Cr( Ⅵ) onto landfill liners containing granular activated carbon or bentonite activated by acid 被引量:6
3
作者 LU Hai-jun LUAN Mao-tian +1 位作者 ZHANG Jin-li YU Yong-xian 《Journal of China University of Mining and Technology》 EI 2008年第1期125-130,共6页
The adsorption capacity of landfill liners containing granular activated carbon (GAC), or bentonite activated by acid, for Cr(VI) was investigated by batch testing. The results show that both GAC and activated bentoni... The adsorption capacity of landfill liners containing granular activated carbon (GAC), or bentonite activated by acid, for Cr(VI) was investigated by batch testing. The results show that both GAC and activated bentonite could be used as sorptive amendments for trapping Cr(VI) in landfill liners. The Cr(VI) sorption to GAC and activated bentonite is much greater than Cr(VI) sorption to natural clay. The adsorption capacity of Cr(VI) onto all the soils increases with increasing temperature; adsorption capacity is also significantly influenced by soil-solid concentration. As the soil-solid concentration increases the adsorption capacity first decreases logarithmically, but then stabilizes when the soil-solid concentration exceeds a critical value (e.g. 400 g/L). Permeability tests were conducted in the laboratory. The results indicate that the hydraulic conductivity of landfill liners containing GAC or activated bentonite can meet the engineering requirement of 1 nm/s. One-dimensional transport simulations for Cr(VI) were performed to evaluate the effect of GAC and activated bentonite on landfill liners. The results of the simulations indicate that landfill liners containing GAC, or activated bentonite, significantly retard the transport of Cr(VI) relative to a conventional clay liner. 展开更多
关键词 adsorption capacity soil-solid concentration landfill liners transport simulation
下载PDF
Numerical modeling and simulation of PEM fuel cells: Progress and perspective 被引量:6
4
作者 Guang-Hua Song Hua Meng 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2013年第3期318-334,共17页
This paper provides a comprehensive review on the research and development in multi-scale numerical modeling and simulation of PEM fuel cells. An overview of recent progress in PEM fuel cell modeling has been provided... This paper provides a comprehensive review on the research and development in multi-scale numerical modeling and simulation of PEM fuel cells. An overview of recent progress in PEM fuel cell modeling has been provided. Fundamental transport phenomena in PEM fuel cells and the corresponding mathematical formulation of macroscale models are analyzed. Various important issues in PEM fuel cell modeling and simulation are examined in detail, including fluid flow and species transport, electron and proton transport, heat transfer and thermal management, liquid water transport and water management, transient response behaviors, and cold-start processes. Key areas for further improvements have also been discussed. 展开更多
关键词 PEM fuel cell · Numerical modeling · Multiscale simulation · Two-phase transport · Water management · Thermal management
下载PDF
Comparison of Semi-Lagrangian Discontinuous Galerkin Schemes for Linear and Nonlinear Transport Simulations 被引量:1
5
作者 Xiaofeng Cai Wei Guo Jing-Mei Qiu 《Communications on Applied Mathematics and Computation》 2022年第1期3-33,共31页
Transport problems arise across diverse fields of science and engineering.Semi-Lagran-gian(SL)discontinuous Galerkin(DG)methods are a class of high-order deterministic transport solvers that enjoy advantages of both t... Transport problems arise across diverse fields of science and engineering.Semi-Lagran-gian(SL)discontinuous Galerkin(DG)methods are a class of high-order deterministic transport solvers that enjoy advantages of both the SL approach and the DG spatial discre-tization.In this paper,we review existing SLDG methods to date and compare numerically their performance.In particular,we make a comparison between the splitting and non-splitting SLDG methods for multi-dimensional transport simulations.Through extensive numerical results,we offer a practical guide for choosing optimal SLDG solvers for linear and nonlinear transport simulations. 展开更多
关键词 Semi-Lagrangian(SL) Discontinuous Galerkin(DG) Transport simulations SPLITTING Non-splitting COMPARISON
下载PDF
CFD simulation of effect of anode configuration on gas–liquid flow and alumina transport process in an aluminum reduction cell 被引量:3
6
作者 詹水清 李茂 +2 位作者 周孑民 杨建红 周益文 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第7期2482-2492,共11页
Numerical simulations of gas–liquid two-phase flow and alumina transport process in an aluminum reduction cell were conducted to investigate the effects of anode configurations on the bath flow, gas volume fraction a... Numerical simulations of gas–liquid two-phase flow and alumina transport process in an aluminum reduction cell were conducted to investigate the effects of anode configurations on the bath flow, gas volume fraction and alumina content distributions. An Euler–Euler two-fluid model was employed coupled with a species transport equation for alumina content. Three different anode configurations such as anode without a slot, anode with a longitudinal slot and anode with a transversal slot were studied in the simulation. The simulation results clearly show that the slots can reduce the bath velocity and promote the releasing of the anode gas, but can not contribute to the uniformity of the alumina content. Comparisons of the effects between the longitudinal and transversal slots indicate that the longitudinal slot is better in terms of gas–liquid flow but is disadvantageous for alumina mixing and transport process due to a decrease of anode gas under the anode bottom surface. It is demonstrated from the simulations that the mixing and transfer characteristics of alumina are controlled to great extent by the anode gas forces while the electromagnetic forces(EMFs) play the second role. 展开更多
关键词 aluminum reduction cell anode configuration gas–liquid flow alumina transport process simulation alumina content distribution
下载PDF
Investigation of impurity transport using supersonic molecular beam injected neon in HL-2A ECRH plasma 被引量:2
7
作者 崔学武 崔正英 +9 位作者 冯北滨 潘宇东 周航宇 孙平 傅炳忠 卢平 董云波 高金明 宋绍栋 杨青巍 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第12期338-346,共9页
In this paper, we describe the behavior of impurity transport in the HL-2A electron cyclotron resonance heating (ECRH) L-mode plasma. The neon as a trace impurity is injected by the supersonic molecular beam injecti... In this paper, we describe the behavior of impurity transport in the HL-2A electron cyclotron resonance heating (ECRH) L-mode plasma. The neon as a trace impurity is injected by the supersonic molecular beam injection (SMBI) technique, which is used for the first time to study the impurity transport in HL-2A. The progression of neon ions is monitored by the soft X-ray camera and bolometer arrays with good temporal and spatial resolutions. The convection and diffusion process of the neon ions are investigated with the one-dimensional impurity transport code STRAHL. The results show that the diffusion coefficient D of neon ions is a factor of four larger than the neoclassical value in the central region. The value of D is larger in the outer region of the plasma (ρ 〉 0.6) than in the central region of the plasma (ρ 〈 0.6). The convective velocity directs inwards with a value of ~-1.0 m/s in the Ohmic discharge, but it reverses to direct outwards with a value of ~ 8.0 m/s in the outer region of the plasma when ECRH is applied. The result indicates that the impurity transport is strongly enhanced with ECRH. 展开更多
关键词 impurity transport impurity injection SMBI numerical simulation
原文传递
Numerical simulations of flow and sediment transport within the Ning-Meng reach of the Yellow River,northern China 被引量:2
8
作者 DOU Shentang YU Xin +1 位作者 DU Heqiang ZHANG Fangxiu 《Journal of Arid Land》 SCIE CSCD 2017年第4期591-608,共18页
Effective management of a river reach requires a sound understanding of flow and sediment transport generated by varying natural and artificial runoff conditions. Flow and sediment transport within the Ning-Meng reach... Effective management of a river reach requires a sound understanding of flow and sediment transport generated by varying natural and artificial runoff conditions. Flow and sediment transport within the Ning-Meng reach of the Yellow River(NMRYR), northern China are controlled by a complex set of factors/processes, mainly including four sets of factors:(1) aeolian sediments from deserts bordering the main stream;(2) inflow of water and sediment from numerous tributaries;(3) impoundment of water by reservoir/hydro-junction; and(4) complex diversion and return of irrigation water. In this study, the 1-D flow & sediment transport model developed by the Yellow River Institute of Hydraulic Research was used to simulate the flow and sediment transport within the NMRYR from 2001 to 2012. All four sets of factors that primarily control the flow and sediment transport mentioned above were considered in this model. Compared to the measured data collected from the hydrological stations along the NMRYR, the simulated flow and sediment transport values were generally acceptable, with relative mean deviation between measured and simulated values of 〈15%. However, simulated sediment concentration and siltation values within two sub-reaches(i.e., Qingtongxia Reservoir to Bayan Gol Hydrological Station and Bayan Gol Hydrological Station to Toudaoguai Hydrological Station) for some periods exhibited relatively large errors(the relative mean deviations between measured and simulated values of 18% and 25%, respectively). These errors are presumably related to the inability to accurately determine the quantity of aeolian sediment influx to the river reach and the inflow of water from the ten ephemeral tributaries. This study may provide some valuable insights into the numerical simulations of flow and sediment transport in large watersheds and also provide a useful model for the effective management of the NMRYR. 展开更多
关键词 numerical simulation flow and sediment transport 1-D flow sediment model Yellow River
下载PDF
Optimal design of heat exchanger header for coal gasification in supercritical water through CFD simulations 被引量:1
9
作者 Lei Huang Lin Qi +2 位作者 Hongna Wang Jinli Zhang Xiaoqiang Jia 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2017年第8期1101-1108,共8页
Heat exchangers play an important role in supercritical water coal gasification systems for heating feed and cooling products. However, serious deposition and plugging problems always exist in heat exchangers. CFD mod... Heat exchangers play an important role in supercritical water coal gasification systems for heating feed and cooling products. However, serious deposition and plugging problems always exist in heat exchangers. CFD modeling was used to simulate the transport characteristics of solid particles in supercdtical water through the shell and tube of heat exchangers to alleviate the problems. In this paper, we discuss seven types of exchangers CA, B, C D, E, F and G), which vary in inlet nozzle configuration, header height, inlet pipe diameter and tube pass distribution. In the modeling, the possibility of deposition in the header was evaluated by accumulated mass of particles; we used the velocity contour of supercritical water (SCW) to evaluate the uniformity of the velocity dis- tribution among the tube passes. Simulation results indicated that the optimum heat exchanger had structure F, which had a rectangular configuration of tube pass distractions, a bottom inlet, a 200-mm header height and a 10-ram inlet pipe diameter. 展开更多
关键词 Supercritical water Shell and tube heat exchanger Particle conveying Pneumatic transport CFD simulations CFX
下载PDF
Influence of gas transport mechanisms on the productivity of multi-stage fractured horizontal wells in shale gas reservoirs 被引量:1
10
作者 Wei Wang Jun Yao +1 位作者 Hai Sun Wen-Hui Song 《Petroleum Science》 SCIE CAS CSCD 2015年第4期664-673,共10页
In order to investigate the influence on shale gas well productivity caused by gas transport in nanometer- size pores, a mathematical model of multi-stage fractured horizontal wells in shale gas reservoirs is built, w... In order to investigate the influence on shale gas well productivity caused by gas transport in nanometer- size pores, a mathematical model of multi-stage fractured horizontal wells in shale gas reservoirs is built, which considers the influence of viscous flow, Knudsen diffusion, surface diffusion, and adsorption layer thickness. A dis- crete-fracture model is used to simplify the fracture mod- cling, and a finite element method is applied to solve the model. The numerical simulation results indicate that with a decrease in the intrinsic matrix permeability, Knudsen diffusion and surface diffusion contributions to production become large and cannot be ignored. The existence of an adsorption layer on the nanopore surfaces reduces the effective pore radius and the effective porosity, resulting in low production from fractured horizontal wells. With a decrease in the pore radius, considering the adsorption layer, the production reduction rate increases. When the pore radius is less than 10 nm, because of the combined impacts of Knudsen diffusion, surface diffusion, and adsorption layers, the production of multi-stage fractured horizontal wells increases with a decrease in the pore pressure. When the pore pressure is lower than 30 MPa, the rate of production increase becomes larger with a decrease in pore pressure. 展开更多
关键词 Shale gas - Transport mechanisms ~Numerical simulation - Fractured horizontal wellProduction
下载PDF
Quantum transport simulation of the two-dimensional GaSb transistors
11
作者 Panpan Wang Songxuan Han Ruge Quhe 《Journal of Semiconductors》 EI CAS CSCD 2021年第12期15-21,共7页
Owing to the high carrier mobility,two-dimensional(2D)gallium antimonite(GaSb)is a promising channel material for field-effect transistors(FETs)in the post-silicon era.We investigated the ballistic performance of the ... Owing to the high carrier mobility,two-dimensional(2D)gallium antimonite(GaSb)is a promising channel material for field-effect transistors(FETs)in the post-silicon era.We investigated the ballistic performance of the 2D GaSb metal-oxide-semiconductor FETs with a 10 nm-gate-length by the ab initio quantum transport simulation.Because of the wider bandgap and better gate-control ability,the performance of the 10-nm monolayer(ML)GaSb FETs is generally superior to the bilayer counterparts,including the three-to-four orders of magnitude larger on-current.Via hydrogenation,the delaytime and power consumption can be further enhanced with magnitude up to 35%and 57%,respectively,thanks to the expanded bandgap.The 10-nm ML GaSb FETs can almost meet the International Technology Roadmap for Semiconductors(ITRS)for high-performance demands in terms of the on-state current,intrinsic delay time,and power-delay product. 展开更多
关键词 2D GaSb 10 nm MOSFET HYDROGENATION density functional theory quantum transport simulation
下载PDF
Simulated impacts of 3D urban morphology on urban transportation in megacities: case study in Beijing
12
作者 Shuo Liu Xiangtao Fan +2 位作者 Qingke Wen Wei Liang Yuanfeng Wu 《International Journal of Digital Earth》 SCIE EI 2014年第6期470-491,共22页
Urban morphology and morphology change and their impacts on urban transportation have been studied extensively in planar urban space.The essential feature of urban space,however,is its three-dimensionality(3D),and few... Urban morphology and morphology change and their impacts on urban transportation have been studied extensively in planar urban space.The essential feature of urban space,however,is its three-dimensionality(3D),and few studies have been conducted from a 3D perspective,overly limiting the accuracy of studies on the relationships between urban morphology and transportation.The aim of this paper is to simulate the impacts of 3D urban morphologies on urban transportation under the Digital Earth framework.On the basis of the principle that population distribution and movement are largely confined by 3D urban morphologies,which affect transportation,high spatial resolution remote sensing imagery and a thematic vector data-set were used to extract urban morphology and transportation-related variables.With a combination of three research methods-factor analysis,spatial regression analysis and Euclidean allocation-we provide an effective method to construct a simulation model.The paper indicates three general results.First,building capacity in the urban space has the most significant impact on traffic condition.Second,obvious urban space otherness,reflecting both use density characteristics and functional character-istics of urban space,mostly results in heavier traffic flow pressure.Third,no single morphology density indicator or single urban structure indicator can reflect its contribution to the pressure of traffic flow directly,but a combination of these different indicators has the ability to do so. 展开更多
关键词 digital city 3D urban morphologies simulation of urban transportation spatial regression euclidean allocation feature factor of 3D urban morphology
原文传递
Numerical Simulation of Transport Phenomena in Solidification of Multicomponent Ingot Using a Continuum Model
13
作者 Daming XU Guangju SI Geying AN and QingChun LI School of Materials Science and Engineering, Harbin institute of Technology, Harbin 150001, China 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2001年第1期67-68,共2页
A continuum model proposed for dendrite solidification of multicomponent alloys, with any partial solid back diffusion, was used to numerically simulate the macroscopic solidification transport phenomena and macrosegr... A continuum model proposed for dendrite solidification of multicomponent alloys, with any partial solid back diffusion, was used to numerically simulate the macroscopic solidification transport phenomena and macrosegregations in an upwards directionally solidified plain carbon steel ingot. The computational results of each macroscopic field of the physical variables involved in the solidification process at a middle solidification stage were presented. 展开更多
关键词 SIMULATION Numerical Simulation of Transport Phenomena in Solidification of Multicomponent Ingot Using a Continuum Model
下载PDF
Improving the efficiency of transport systems using simulation
14
作者 Bushuev Sergey Valentinovich Kovalev Igor Alexandrovich +1 位作者 Permikin Vadim Yurievich Anashkina Nataliia Yurievna 《系统仿真学报》 CAS CSCD 北大核心 2020年第2期340-345,共6页
The article describes the possibilities of application of simulation modeling for the analysis of infrastructure and technology of transport services of enterprises. The main technological and possible economic effect... The article describes the possibilities of application of simulation modeling for the analysis of infrastructure and technology of transport services of enterprises. The main technological and possible economic effects for the enterprises arising at performance of modeling of a transport component of their work are resulted. 展开更多
关键词 SERVICE Improving the efficiency of transport systems using simulation
原文传递
Numerical simulation of oxygen transport in the aorta:the effect of spiral flow
15
作者 Xiao Liu1(graduate student),Xiaoyan Deng2(supervisor),Yubo Fan(School of Biological Science & Medical Engineering,Beihang University,Beijing,100191,China) 《医用生物力学》 EI CAS CSCD 2009年第S1期131-132,共2页
It has been suggested that hypoxia may occur in the arterial system and is likely to involve in the localization of atherogenesis[1].In the present communication,we tested the hypothesis numerically that the spiral fl... It has been suggested that hypoxia may occur in the arterial system and is likely to involve in the localization of atherogenesis[1].In the present communication,we tested the hypothesis numerically that the spiral flow observed in the aorta may have a great impact on oxygen 展开更多
关键词 Numerical simulation of oxygen transport in the aorta
原文传递
High-performance sub-10-nm monolayer black phosphorene tunneling transistors 被引量:4
16
作者 Hong Li Jun Tie +8 位作者 Jingzhen Li Meng Ye Han Zhang Xiuying Zhang Yuanyuan Pan Yangyang Wang Ruge Quhe Feng Pan Jing Lu 《Nano Research》 SCIE EI CAS CSCD 2018年第5期2658-2668,共11页
Moore's law is approaching its physical limit. Tunneling field-effect transistors (TFETs) based on two-dimensional (2D) materials provide a possible scheme to extend Moore's law down to the sub-10-nm region owin... Moore's law is approaching its physical limit. Tunneling field-effect transistors (TFETs) based on two-dimensional (2D) materials provide a possible scheme to extend Moore's law down to the sub-10-nm region owing to the electrostatic integrity and absence of dangling bonds in 2D materials. We report an ab initio quantum transport study on the device performance of monolayer (ML) black phosphorene (BP) TFETs in the sub-10-nm scale (6-10 nm). Under the optimal schemes, the ML BP TFETs show excellent device performance along the armchair transport direction. The on-state current, delay time, and power dissipation of the optimal sub-10-nm ML BP TFETs significantly surpass the latest International Technology Roadmap for Semiconductors (ITRS) requirements for high- performance devices. The subthreshold swings are 56-100 mV/dec, which are much lower than those of their Schottky barrier and metal oxide semiconductor field-effect transistor counterparts. 展开更多
关键词 black phosphorene tunneling field-effect transistor device performance ab initio quantum transport simulation
原文传递
Beam transport design for a 1 MeV prototype dielectric wall accelerator 被引量:3
17
作者 朱隽 张篁 +8 位作者 彭士香 任海涛 夏连胜 王文斗 杨治勇 谌怡 石金水 章林文 邓建军 《Chinese Physics C》 SCIE CAS CSCD 2014年第4期80-83,共4页
The beam transport design of a novel proton dielectric wall accelerator is introduced in this paper. The protons will be accelerated from 40 keV to nearly 1 MeV under an accelerating gradient that is as high as 20 MV/... The beam transport design of a novel proton dielectric wall accelerator is introduced in this paper. The protons will be accelerated from 40 keV to nearly 1 MeV under an accelerating gradient that is as high as 20 MV/m. A consideration of the beam line as well as the transport simulation is presented. The influences of the injection timing jitter and the accelerating pulse timing jitter are also discussed. 展开更多
关键词 beam transport dielectric wall accelerator accelerating gradient transport simulation timing jitter
原文传递
Electrical contacts in monolayer blue phosphorene devices 被引量:2
18
作者 Jingzhen Li Xiaotian Sun +11 位作者 Chengyong Xu Xiuying Zhang Yuanyuan Pan Meng Ye Zhigang Song Ruge Quhe Yangyang Wang Han Zhang Ying Guo Jinbo Yang Feng Pan Jing Lu 《Nano Research》 SCIE EI CAS CSCD 2018年第4期1834-1849,共16页
Semiconducting monolayer (ML) blue phosphorene (BlueP) shares similar stability with ML black phosphorene (BP), and it has recently been grown on an Au surface. Potential ML BlueP devices often require direct co... Semiconducting monolayer (ML) blue phosphorene (BlueP) shares similar stability with ML black phosphorene (BP), and it has recently been grown on an Au surface. Potential ML BlueP devices often require direct contact with metal to enable the injection of carriers. Using ab initio electronic structure calculations and quantum transport simulations, for the first time, we perform a systematic study of the interfacial properties of ML BlueP in contact with metals spanning a wide work function range in a field effect transistor (FET) configuration. ML BlueP has undergone metallization owing to strong interaction with five metals. There is a strong Fermi level pinning (FLP) in the ML BlueP FETs due to the metal-induced gap states (MIGS) with a pinning factor of 0.42. ML BlueP forms n-type Schottky contact with Sc, Ag, and Pt electrodes with electron Schottky barrier heights (SBHs) of 0.22, 0.22, and 0.80 eV, respectively, and p-type Schottky contact with Au and Pd electrodes with hole SBHs of 0.61 and 0.79 eV, respectively. The MIGS are eliminated by inserting graphene between ML BlueP and the metal electrode, accompanied by a transition from a strong FLP to a weak FLP. Our study not only provides insight into the ML BlueP-metal interfaces, but also helps in the design of ML BlueP devices. 展开更多
关键词 monolayer blue phosphorene interface property Schottky barrier field-effect transistor density functional theory quantum transport simulation
原文传递
A polarization-sensitive,self-powered,broadband and fast Ti_(3)C_(2)T_(x)MXene photodetector from visible to near-infrared driven by photogalvanic effects 被引量:2
19
作者 Bo Liu Liyu Qian +5 位作者 Yanliang Zhao Yiwen Zhang Feng Liu Yi Zhang Yiqun Xie Wangzhou Shi 《Frontiers of physics》 SCIE CSCD 2022年第5期9-15,共7页
Broadband,self-power,and polarization-sensitivity are desirable qualities for a photodetector.However,currently few photodetectors can fulfill these requirements simultaneously.Here,we propose a Ti_(3)C_(2)T_(x)(MXene... Broadband,self-power,and polarization-sensitivity are desirable qualities for a photodetector.However,currently few photodetectors can fulfill these requirements simultaneously.Here,we propose a Ti_(3)C_(2)T_(x)(MXene)photodetector that is driven by the photogalvanic effect with impressive performances.A polarization-sensitive photocurrent is generated at zero bias under the illumination of linearly polarized laser light of 1064 nm,with an extinction ratio of 1.11.Meanwhile,a fast response with a 32/28 ms rise/decay time and a large on/off switching ratio of 120 are achieved.Besides,a robust zero-bias photocurrent is also generated in the photodetector under the illumination of 940 and 620 nm light,as well as the white light,showing a broadband photoresponse from the near-infrared to visible.Moreover,quantum transport simulations indicate that the photogalvanic effect plays an important role in the generation of the polarized photocurrent at zero bias due to the broken space inversion symmetry of the stacked few-layer Ti_(3)C_(2)T_(x).Our results shed light on a potential application of the Ti_(3)C_(2)T_(x)–MXene in the low-power photodetection with high performances. 展开更多
关键词 PHOTODETECTION polarization-sensitivity photogalvanic effects Ti_(3)C_(2)T_(x) MXene quantum transport simulations
原文传递
Device performance limit of monolayer SnSe_(2) MOSFET 被引量:1
20
作者 Hong Li Jiakun Liang +5 位作者 Qida Wang Fengbin Liu Gang Zhou Tao Qing Shaohua Zhang Jing Lu 《Nano Research》 SCIE EI CSCD 2022年第3期2522-2530,共9页
Two-dimensional(2D)semiconductors are attractive channels to shrink the scale of field-effect transistors(FETs),and among which the anisotropic one is more advantageous for a higher on-state current(I_(on)).Monolayer(... Two-dimensional(2D)semiconductors are attractive channels to shrink the scale of field-effect transistors(FETs),and among which the anisotropic one is more advantageous for a higher on-state current(I_(on)).Monolayer(ML)SnSe_(2),as an abundant,economic,nontoxic,and stable two-dimensional material,possesses an anisotropic electronic nature.Herein,we study the device performances of the ML SnSe_(2) metal-oxide-semiconductor FETs(MOSFETs)and deduce their performance limit to an ultrashort gate length(L_(g))and ultralow supply voltage(V_(dd))by using the ab initio quantum transport simulation.An ultrahigh I_(on) of 5,660 and 3,145µA/µm is acquired for the n-type 10-nm-L_(g) ML SnSe_(2) MOSFET at V_(dd)=0.7 V for high-performance(HP)and low-power(LP)applications,respectively.Specifically,until L_(g) scales down to 2 and 3 nm,the MOSFETs(at V_(dd)=0.65 V)surpass I_(on),intrinsic delay time(τ),and power-delay product(PDP)of the International Roadmap for Device and Systems(IRDS,2020 version)for HP and LP devices for the year 2028.Moreover,the 5-nm-L_(g) ML SnSe_(2) MOSFET(at V_(dd)=0.4 V)fulfills the IRDS HP device and the 7-nm-L_(g) MOSFET(at V_(dd)=0.55 V)fulfills the IRDS LP device for the year 2034. 展开更多
关键词 monolayer(ML)SnSe_(2) ANISOTROPIC metal-oxide-semiconductor field-effect transistor(MOSFET) device performance limit ab initio transport simulation
原文传递
上一页 1 2 下一页 到第
使用帮助 返回顶部