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Top gate engineering of field-effect transistors based on wafer-scale two-dimensional semiconductors

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Journal of Materials Science & Technology 2022年第11期106卷 243-248页

作者： Jingyi Ma Xinyu Chen Yaochen Sheng Ling Tong Xiaojiao Guo Minxing Zhang Chen Luo Lingyi Zong yin Xia Chuming Sheng yin Wang Saifei Gou Xinyu Wang Xing Wu Peng Zhou David Wei Zhang Chenjian Wu Wenzhong Bao State Key Laboratory of ASIC and System School of MicroelectronicsFudan UniversityShanghai200433China In Situ Devices Center Shanghai Key Laboratory of Multidimensional Information ProcessingEast China Normal UniversityShanghai 200241China School of Electronic Information Soochow UniversitySuzhou215006China

The investigation of two-dimensional(2D)materials has advanced into practical device applications,such as cascaded logic ***,incompatible electrical properties and inappropriate logic levels remain enormous *** this work,a doping-free strategy is investigated by top gated(TG)MoS_(2) field-effect transistors(FETs)using various metal gates(Au,Cu,Ag,and Al).These metals with different work functions provide a convenient tuning knob for controlling threshold voltage(V_(th))for MoS_(2) *** instance,the Al electrode can create an extra electron doping(n-doping)behavior in the MoS_(2) TG-FETs due to a dipole effect at the gate-dielectric *** this work,by achieving matched electrical properties for the load transistor and the driver transistor in an inverter circuit,we successfully demonstrate wafer-scale MoS_(2) inverter arrays with an optimized inverter switching threshold voltage(V_(M))of 1.5 V and a DC voltage gain of 27 at a supply voltage(V_(DD))of 3 *** work offers a novel scheme for the fabrication of fully integrated multistage logic circuits based on wafer-scale MoS_(2) film.

关键词： Two-dimensional semiconductor MoS_(2) Top gate Field effect transistor Logic inverter

Recent advances and practical challenges of high-energy-density flexible lithium-ion batteries

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Frontiers of Chemical Science and Engineering 2024年第8期18卷 79-98页

作者： Guangxiang Zhang Xin Chen Yulin Ma Hua Huo Pengjian Zuo Geping yin Yunzhi Gao Chuankai Fu State Key Laboratory of Space Power-Sources Harbin Institute of TechnologyHarbin 150001China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China

With the rapid iteration and update of wearable flexible devices,high-energy-density flexible lithium-ion batteries are rapidly ***,energy density,and safety are all important indicators for flexible lithium-ion batteries,which can be determined jointly by material selection and structural ***,recent progress on high-energy-density electrode materials and flexible structure designs are *** electrode materials and the next-generation high-energy-density electrode materials are analyzed in *** electrolytes with high safety and excellent flexibility are classified and *** strategies to increase the mass loading of active materials on the electrodes by designing the current collector and electrode structure are discussed with keys of representative *** the novel configuration structures to enhance the flexibility of batteries are *** the end,it is pointed out that it is necessary to quantify the comprehensive performance of flexible lithium-ion batteries and simultaneously enhance the energy density,flexibility,and safety of batteries for the development of the next-generation high-energy-density flexible lithium-ion batteries.

关键词： lithium-ion batteries flexibility high energy density safety

Cobalt Determination by Means of Flow Injection On-line Sorbent Preconcentration-Flame Atomic Absorption Spectrometry with 1-Nitroso-2-naphthol as a Complexing Reagent

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Chemical Research in Chinese Universities 2001年第3期17卷 264-270页

作者： yin Xue-feng ALI Akbar XU Guang-ming LING Yun-yang GAO Jian YE Mei-ying Department of Chemistry Zhejiang UniversityHangzhou 310027P.R.China

The suitability of 1-nitroso-2-naphthol(NN) as a complexing agent for on-line preconcentration of cobalt eluted on the C_(18) microcolumn by means of the FI-FAAS system was tested. Various parameters affecting the complex formation and its elution were optimized. A 2.3×10^(-3) mol/L reagent solution and the aqueous sample solution acidified with 0.1% (volume fraction) nitric acid were on-line mixed (6.4 mL/min) on a reaction coil set at (65±1)℃ and flowed through the microcolumn for 30 s. The pH of the mixed solution was adjusted to 3—4 with HNO_3(1 mol/L) or NaOH(1 mol/L). The adsorbed complexes in the microcolumn were eluted into the nebulizer of FAAS in 10 s with ethanol acidified with 1% HNO_3(3.0 mL/min). A good precision(1.6% for 100μg/L Co(Ⅱ), n=10), a high enrichment factor 17.2, with detection limit (3σ) 3.2μg/L, and sample throughput (90 h^(-1)) were obtained. The method was applied to the certified reference materials(CRMs), NBS-362 and NBS-364, for the determination of cobalt and the results were in good agreement with the certified values.

关键词： Cobalt FI on-line preconcentration AAS 1-Nitroso-2-naphthol

NIR-plasmon-enhanced Systems for Energy Conversion and Environmental Remediation

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Chemical Research in Chinese Universities 2020年第6期36卷 1000-1005页

作者： WANG Wenke Sandra Elizabeth SAJI Siva KARUTURI ZHENG Hong MENG Guodong CHENG Yonghong yin Zongyou Center of Nanomaterials for Renewable Energy(CNRE) State Key Laboratory of Electrical Insulation and Power EquipmentSchool of Electrical EngineeringXi'an Jiaotong UniversityXi'an 710049P.R.China Research School of Chemistry Australian National UniversityACT 2601Australia Research School of Physics and Research School of Electrical Energy and Materials EngineeringAustralian National UniversityCanberraATC 2601Australia

The introduction of plasmons is an important method to solve the insufficient utilization of the full spectrum of solar energy by semiconductor ***,semiconductor catalysts combined with traditional noble metal plasmons(Au,Ag)can only extend the absorption spectrum to partially visible *** order to further improve the photoenergy absorption efficiency of catalysts,they need to be able to effectively utilize near-infrared light,which has become a new research *** studies have shown that traditional noble metal plasmons can absorb a part of NIR through special morphology,size control and material *** the same time,gratifying achievements have been made in the application of plasmonic semiconductors with broad spectrum absorption in *** article reviews the principles of generating and regulating plasmonic effects in different catalytic *** applications of plasmon absorption of near-infrared light in energy conversion and environmental remediation have also been presented.

关键词： Near-infrared Plasmon Energy conversion Environmental remediation

The Sense of Flow of L1 Audience for L2 Composition——A Pedagogical Implication from Cross-Pacific Exchange to the Teaching of English Writing

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Journal of Literature and Art Studies 2018年第7期8卷 1064-1070页

作者： DU yin-yin Guangdong University of Foreign Studies GuangzhouChina

The present study focuses on the native readers’sense of flow,a construct frequently ignored in L2 writing *** on the author’s analysis of the communicative data in the web-based transnational peer editing activities named Cross-Pacific Exchange,an amendment is proposed for the currently well-accepted“input-output”models;that is,fluent output by classroom L2 learners may not always be accepted by native ***,L2 writing teachers should encourage their students to pay attention to their L1 readers’sense of flow,so as to enhance their own reader awareness,and improve the quality of their L2 composition through interaction with their L1 audience.

关键词： sense of flow reader audience English writing Cross-Pacific Exchange

A cellulose-based lithium-ion battery separator with regulated ionic transport and high thermal stability for extreme environments

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Nano Research 2025年第1期18卷 315-322页

作者： Kun-Peng Yang Song Xie Zi-Meng Han Hao-Cheng Liu Chong-Han yin Wen-Bin Sun Zhang-Chi Ling Huai-Bin Yang De-Han Li Qing-Fang Guan Shu-Hong Yu Department of Chemistry New Cornerstone Science LaboratoryInstitute of Biomimetic Materials&ChemistryAnhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials&ChemistryHefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China Institute of Innovative Materials Department of Materials Science and EngineeringDepartment of ChemistrySouthern University of Science and TechnologyShenzhen 518055China

Separators play a critical role in lithium-ion ***,the restrictions of thermal stability and inferior electrical performance in commercial polyolefin separators significantly limit their applications under harsh ***,we report a cellulose-assisted self-assembly strategy to construct a cellulose-based separator massively and *** an ultrahigh ionic conductivity in electrolytes of 3.7 mS·cm^(-1) and the ability to regulate ion transport,the obtained separator is a promising alternative for high-performance lithium-ion *** addition,integrated with high thermal stability,the cellulose-based separator endows batteries with high safety at high temperatures,greatly expanding the application scenarios of energy storage devices in extreme environments.

关键词： lithium-ion batteries bio-inspired materials battery separators cellulose nanofiber ultrahigh ionic conductivity high safety

Effects of Chromium,Vanadium and Austenite Deformation on Transformation Behaviors of High-strength Spring Steels

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Journal of Iron and Steel Research International 2016年第12期23卷 1323-1332页

作者： Gang NIU yin-li CHEN Hui bin WU Xuan WANG Mao-fang ZUO Zhi-jun XU Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China Engineering Research Institute University of Science and Technology BeijingBeijing 100083China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation Beijing 100083China

The phase transformation behavior during continuous cooling of high-strength spring steels containing different amounts of Cr was studied. Furthermore, the effects of combining Cr with V as well as austenite deformation on the transformation kinetics were investigated in the method of dilatometry and metallography hardness. The re suits showed that, with the increase of Cr, the pearlite transformation field was enlarged, the ferrite transformation field was narrowed, and the entire phase field shifted to the right. With the addition of V, the start transformation temperature of undercooling austenite （Ar3） was gradually increased, but the ferrite and pearlite transformation fields were not affected. Besides, the minimum critical cooling rate of martensilic transformation was also reduced. In addition, the dynamic continuous cooling transformation （CCT） curve moves to the top left compared with the static CCT curve. The transformed microstructures showed that the addition of V and the deformation not only refined the overall transformed microstructures but also reduced the lamellar spacing of pearlite. The alloying elements Cr and V promoted the Vickers hardness. However, the effect of Cr on the Vickers hardness of martensite was stronger and the influence of V on that of pearlite was stronger. Moreover, the Vickers hardness affected by the austenite deformation was more complex and strongly depended on the transformed microstructures.

关键词： spring steel phase transformation Chromium deformation microstructure

Discharge voltage behavior of electric double-layer capacitors during high-g impact and their application to autonomously sensing high-g accelerometers

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Nano Research 2018年第2期11卷 1146-1156页

作者： Keren Dai Xiaofeng Wang Fang Yi Yajiang yin Cheng Jiang Simiao Niu Qingyu Li Zheng You Collaborative Innovation Center for Micro/Nano Fabrication Device and System Tsinghua University Beijing China State Key Laboratory of Precision Measurement Technology and Instruments Tsinghua University Beijing China Department of Precision Instrument Tsinghua University Beijing China College of Chemistry and Molecular Engineering Peking University Beijing China School of Chemical Engineering Stanford University Stanford USA Department of Electronic Engineering Tsinghua University Beijing China

In this study, the discharge voltage behavior of electric double-layer capacitors （EDLCs） during high-g impact is studied both theoretically and experimentally. A micro-scale dynamic mechanism is proposed to describe the physical basis of the increase in the discharge voltage during a high-g impact. Based on this dynamic mechanism, a multi-field model is established, and the simulation and experimental studies of the discharge voltage increase phenomenon are conducted. From the simulation and experimental data, the relationship between the increased voltage and the high-g acceleration is revealed. An acceleration detection range of up to 10,000g is verified. The design of the device is optimized by studying the influences of the parameters, such as the electrode thickness and discharge current, on the outputs. This work opens up new avenues for the development of autonomous sensor systems based on energy storage devices and is significant for many practical applications such as in collision testing and automobile safety.

关键词： electric double-layercapacitor high-g acceleration autonomous sensor dynamic model

Photoactivated organic phosphorescence by stereo-hindrance engineering for mimicking synaptic plasticity

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Light(Science & Applications) 2023年第6期12卷 972-981页

作者： He Wang Yuan Zhang Chifeng Zhou Xiao Wang Huili Ma Jun yin Huifang Shi Zhongfu An Wei Huang Key Laboratory of Flexible Electronics(KLoFE)&Institute of Advanced Materials(IAM) Nanjing Tech UniversityNanjing 211800China The Institute of Flexible Electronics(IFE Future Technologies)Xiamen UniversityXiamen 361005China Department of Applied Physics The Hong Kong Polytechnic UniversityKowloon 999077 Hong KongChina State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM) Nanjing University of Posts&Telecommunications9 Wenyuan RoadNanjing 210023China Frontiers Science Center for Flexible Electronics(FSCFE) MIIT Key Laboratory of Flexible Electronics(KLoFE)Northwestern Polytechnical UniversityXi’an 710072China

Purely organic phosphorescent materials with dynamically tunable optical properties and persistent luminescent characteristics enable more novel applications in intelligent ***,we reported a concise and universal strategy to achieve photoactivated ultralong phosphorescence at room temperature through stereo-hindrance *** dynamically photoactivated phosphorescence behavior was ascribed to the suppression of non-radiative transitions and improvement of spin-orbit coupling(SOC)as the variation of the distorted molecular conformation by the synergistic effect of electrostatic repulsion and steric ***“trainable”phosphorescent behavior was first proposed to mimic biological synaptic plasticity,especially for unique experience-dependent plasticity,by the manipulation of pulse intensity and *** study not only outlines a principle to design newly dynamic phosphorescent materials,but also broadens their utility in intelligent sensors and robotics.

关键词： plasticity stereo electrostatic