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Black phosphorus-based van der Waals heterostructures for mid-infrared light-emission applications

Light(Science & Applications) 2020年第1期9卷 922-929页

作者： Xinrong Zong Huamin Hu Gang Ouyang Jingwei Wang run shi Le Zhang Qingsheng Zeng Chao Zhu Shouheng Chen Chun Cheng Bing Wang Han Zhang Zheng Liu Wei Huang Taihong Wang Lin Wang Xiaolong Chen Department of Electrical and Electronic Engineering Southern University of Science and Technology518055 ShenzhenChina Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing Tech University(Nanjing Tech)30 South Puzhu Road211816 NanjingChina Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education and Key Laboratory for Matter Microstructure and Function of Hunan ProvinceHunan Normal University410081 ChangshaChina Department of Materials Science and Engineering Southern University of Science and Technology518055 ShenzhenChina Center for Programmable Materials School of Materials Science and Engineering Nanyang Technological University Singapore 639798Singapore Institute of Microscale Optoelectronics Collaborative Innovation Centre for Optoelectronic Science&TechnologyKey Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen Key Laboratory of Micro-Nano Photonic Information TechnologyGuangdong Laboratory of Artificial Intelligence and Digital Economy(SZ)Shenzhen University518060 ShenzhenChina Frontiers Science Center for Flexible Electronics(FSCFE) Shaanxi Institute of Flexible Electronics(SIFE)&Shaanxi Institute of Biomedical Materials and Engineering(SIBME)Northwestern Polytechnical University(NPU)127 West Youyi Road710072 Xi’anChina

Mid-infrared(MIR)light-emitting devices play a key role in optical communications,thermal imaging,and material analysis applications.Two-dimensional(2D)materials offer a promising direction for next-generation MIR devices owing to their exotic optical properties,as well as the ultimate thickness limit.More importantly,van der Waals heterostructures-combining the best of various 2D materials at an artificial atomic level-provide many new possibilities for constructing MIR light-emitting devices of large tuneability and high integration.Here,we introduce a simple but novel van der Waals heterostructure for MIR light-emission applications built from thin-film BP and transition metal dichalcogenides(TMDCs),in which BP acts as an MIR light-emission layer.For BP–WSe_(2) heterostructures,an enhancement of~200% in the photoluminescence intensities in the MIR region is observed,demonstrating highly efficient energy transfer in this heterostructure with type-Ⅰ band alignment.For BP-MoS_(2) heterostructures,a room temperature MIR light-emitting diode(LED)is enabled through the formation of a vertical PN heterojunction at the interface.Our work reveals that the BP-TMDC heterostructure with efficient light emission in the MIR range,either optically or electrically activated,provides a promising platform for infrared light property studies and applications.

关键词： light phosphorus constructing

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Meiotic nuclear divisions 1(MND1)fuels cell cycle progression by activating a KLF6/E2F1 positive feedback loop in lung adenocarcinoma

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Cancer Communications 2021年第6期41卷 492-510页

作者： Quanli Zhang run shi Yongkang Bai Lijuan Meng Jingwen Hu Hongyu Zhu Tongyan Liu Xiaomeng De Siwei Wang Jie Wang Lin Xu Guoren Zhou Rong Yin Department of Thoracic Surgery the Affiliated Cancer Hospital of Nanjing Medical University&Jiangsu Cancer Hospital&Jiangsu Institute of Cancer ResearchJiangsu Key Laboratory of Molecular and Translational Cancer ResearchCollaborative Innovation Center for Cancer Personalized MedicineNanjingJiangsu 210009P.R.China Department of Scientific Research Jiangsu Cancer Hospital&the Affiliated Cancer Hospital of Nanjing Medical University&Jiangsu Institute of Cancer ResearchJiangsu Key Laboratory of Molecular and Translational Cancer ResearchNanjingJiangsu 210009P.R.China The Fourth Clinical College of Nanjing Medical University NanjingJiangsu 210009P.R.China Jiangsu Biobank of Clinical Resources NanjingJiangsu 210009P.R.China Faculty of Medicine Ludwig-Maximilians-Universität(LMU)MünchenMünchenBayern D-80539Germany Department of Oncology Jiangsu Cancer Hospital&the Affiliated Cancer Hospital of Nanjing Medical University&Jiangsu Institute of Cancer ResearchNanjingJiangsu 210009P.R.China Department of Geriatric Oncology The First Affiliated Hospital with Nanjing Medical UniversityNanjingJiangsu 210009P.R.China

Background:Considering the increase in the proportion of lung adenocarcinoma(LUAD)cases among all lung cancers and its considerable contribution to cancer-related deaths worldwide,we sought to identify novel oncogenes to provide potential targets and facilitate a better understanding of the malignant progression of LUAD.Methods:The results from the screening of transcriptome and survival analyses according to the integrated Gene Expression Omnibus(GEO)datasets and The Cancer Genome Atlas(TCGA)data were combined,and a promising risk biomarker called meiotic nuclear divisions 1(MND1)was selectively acquired.Cell viability assays and subcutaneous xenograftmodelswere used to validate the oncogenic role ofMND1 in LUADcell proliferation and tumor growth.Aseries of assays,including mass spectrometry,co-immunoprecipitation(Co-IP),and chromatin immunoprecipitation(ChIP),were performed to explore the underlying mechanism.Results:MND1 up-regulation was identified to be an independent risk factor for overall survival in LUAD patients evaluated by both tissue microarray staining and third party data analysis.In vivo and in vitro assays showed that MND1 promoted LUAD cell proliferation by regulating cell cycle.The results of the Co-IP,ChIP and dual-luciferase reporter assays validated that MND1 competitively bound to tumor suppressor Kruppel-like factor 6(KLF6),and thereby protecting E2F transcription factor 1(E2F1)from KLF6-induced transcriptional repression.Luciferase reporter and ChIP assays found that E2F1 activated MND1 transcription by binding to its promoter in a feedback manner.Conclusions:MND1,KLF6,and E2F1 form a positive feedback loop to regulate cell cycle and confer DDP resistance in LUAD.MND1 is crucial for malignant progression and may be a potential therapeutic target in LUAD patients.

关键词： cell cycle cisplatin resistance E2F transcription factor 1(E2F1) Kruppel-like factor 6(KLF6) lung adenocarcinoma meiotic nuclear divisions 1(MND1) positive feedback loop

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Progress and Prospect of Photothermal Catalysis

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Chemical Research in Chinese Universities 2022年第3期38卷 723-734页

作者： DU shihao BIAN Xuanang ZHAO Yunxuan shi run ZHANG Tierui Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing100090P.R.China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100149P.R.China

Recently,solar-driven synthesis due to its energy-saving and environmentally friendly advantages has attracted more and more attention,whereas the low solar-to-chemical conversion efficiency significantly hindered its development.New effective options that fully utilize full-band sunlight are urgently needed.Novel photothermal catalysis combined with the advantages of photocatalysis and thermalcatalysis can improve the utilization efficiency of solar energy and lower the reaction temperature,thus becoming a promising technology.This review divides photothermal catalysis into photo-assisted thermalcatalysis,thermal-assisted photocatalysis,and photothermal synergistic catalysis.Furthermore,the catalytic mechanical understanding of how photothermal affects the catalytic property of different applications(e.g.,water splitting,CO_(2)/N_(2) reduction,and environmental treatment)was also summed up and discussed in detail.The discussion ends with unsolved challenges in photothermal catalysis,particularly emphasizing the effect of temperature or sunlight on catalytic performance.

关键词： Photothermal catalysis Photocatalysis Solar Fuel Environment

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减震器静摩擦力检测系统开发

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机械工程与自动化 2024年第1期 141-143页

作者：李生辉孙晓帮蔡世润辽宁工业大学辽宁锦州121000

针对减震器静摩擦力测试精度差、测试角度不可设的问题,开发了减震器静摩擦力检测系统。通过SolidWorks软件完成了检测系统的机械设计,采用PLC作下位机控制伺服电机完成测试的机械动作,使用LabVIEW虚拟仪器作为上位机完成控制数据输出... 详细信息

针对减震器静摩擦力测试精度差、测试角度不可设的问题,开发了减震器静摩擦力检测系统。通过SolidWorks软件完成了检测系统的机械设计,采用PLC作下位机控制伺服电机完成测试的机械动作,使用LabVIEW虚拟仪器作为上位机完成控制数据输出、传感器参数采集、静摩擦力曲线绘制。最后对检测系统进行实际运行试验,试验结果表明:该检测系统有效完成了减震器静摩擦力测试,具有检测精度高、测试角度可设定、测试曲线绘制等特点。

关键词：减震器静摩擦力检测系统

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基于最优化残差划分Markov修正的城市用电量预测模型

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智能城市 2024年第2期10卷 49-53页

作者：曾孟佳温柔施闰虎黄旭唐陈宇湖州学院电子信息学院浙江湖州313000 湖州师范学院信息工程学院浙江湖州313000 湖州市城市多维感知与智能计算重点实验室浙江湖州313000 辽宁大学辽宁沈阳110000

对湖州城市居民用电量进行预测过程中,历史用电量数据显示出较强的波动性与季节性,导致原始模型预测效果不理想,文章引入并改进Markov修正组合模型,将Markov修正残差划分部分改进为不同算子残差划分,并用来修正新陈代谢GM(1,1)、SARIMA... 详细信息

对湖州城市居民用电量进行预测过程中,历史用电量数据显示出较强的波动性与季节性,导致原始模型预测效果不理想,文章引入并改进Markov修正组合模型,将Markov修正残差划分部分改进为不同算子残差划分,并用来修正新陈代谢GM(1,1)、SARIMA、Holt-Winters、LSTM等原始模型。使用DC-Markov、MC-Markov、SC-Markov修正后的组合模型预测湖州市的未来月份城市居民用电数据。结果表明,文章提出的最优化残差划分Markov修正模型预测精度较原始模型有一定程度提高,DC-Markov-Holt-Winters模型在湖州市城市居民用电数据的预测上具有较高的精度。

关键词：残差划分 Markov修正季节性分析用电量预测

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Static recrystallization behaviors and mechanisms of 7Mo super-austenitic stainless steel with undissolved sigma precipitates during double-stage hot deformation

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Journal of Iron and Steel Research(International) 2024年第2期31卷 475-487页

作者： shi-guang Xu Jin-shan He run-ze Zhang Fu-cheng Zhang Xi-tao Wang Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing100083China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao066004HebeiChina Shandong Provincial Key Laboratory for High Strength Lightweight Metallic Materials Advanced Materials InstituteQilu University of Technology(Shandong Academy of Science)Jinan250353ShandongChina

Static recrystallization(SRX)behaviors and corresponding recrystallization mechanisms of 7Mo super-austenitic stainless steel were studied under different deformation conditions.The order of influence of deformation parameters on static recrystallization behaviors,from high to low,is followed by temperature,first-stage strain and strain rate.Meanwhile,the effect of holding time on static recrystallization behaviors is significantly controlled by temperature.In addition,with the increase in temperature from 1000 to 1200°C,the static recrystallization mechanism evolves from discontinuous static recrystallization and continuous static recrystallization(cSRX)to metadynamic recrystallization and cSRX,and finally to cSRX.The cSRX exists at all temperatures.This is because high stacking fault energy(56 mJ m−2)promotes the movement of dislocations,making the deformation mechanism of this steel is dominated by planar slip of dislocation.Large undissolved sigma precipitates promote static recrystallization through particle-stimulated nucleation.However,small strain-induced precipitates at grain boundaries hinder the nucleation of conventional SRX and the growth of recrystallized grains,while the hindering effect decreases with the increase in temperature.

关键词： 7Mo super-austenitic stainless steel Double-stage hot deformation Conventional static recrystallization Metadynamic recrystallization Strain-induced precipitation

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Intermittent sliding-lock-knot suture for limbal conjunctival autograft fixation in pterygium surgery:a technique note

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International Journal of Ophthalmology(English edition) 2024年第5期17卷 838-844页

作者： Ling Zhang run-Hua Lyu Jing-Ru Wang Wen-Jian shi Feng Zheng Ying-Ying Gao Department of Ophthalmology the Second Affiliated HospitalFujian Medical UniversityQuanzhou 362000Fujian ProvinceChina Department of Neurosurgery the Second Affiliated HospitalFujian Medical UniversityQuanzhou 362000Fujian ProvinceChina

AIM:To report a technique used with intermittent slidinglock-knot(ISLK)fixation for limbal conjunctival autografts in pterygium surgery and compared with those of routine intermittent(RI)fixation.METHODS:Consecutive patients with primary pterygium who had undergone pterygium excision combined with limbal conjunctival autograft transplantation between March 2021 and March 2022 at our institute were retrospectively analyzed.Primary outcome measures were mean duration of surgery and suture removal,degree of conjunctival hyperemia on postoperative day 1,pain score at suture removal,postoperative symptoms at 6mo,including conjunctival hyperemia,foreign body sensation,and graft stability.RESULTS:Ninety-eight patients underwent monocular surgery and were divided into ISLK(51 eyes)and RI(47 eyes)groups according to the type of conjunctiva autograft fixation method planned.There was no significant difference in mean duration of surgery between the two groups(18.59±2.39min vs 18.15±2.20min,P=0.417);however,compared to the RI group,shorter suture removal times were observed in the ISLK group[0.58min(0.42-0.87)vs 3.00min(2.21-4.15),P<0.001].The degree of conjunctival hyperemia on postoperative day 1 was milder in the ISLK group(P<0.001).Pain scores at suture removal were lower in the ISLK group than in RI group[1(0-3)vs 2(1-4),P<0.001].Postoperative symptoms at 6mo were comparable between the groups(P=0.487),with no recurrence.CONCLUSION:ISLK is an innovative method for limbal conjunctival autograft fixation after pterygium excision.Compared to RI fixation,ISLK facilitates suture removal and reduces discomfort,with comparable surgery duration and less conjunctival hyperemia.

关键词： intermittent sliding-lock-knot fixation pterygium suture removal

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A Hf-doped dual-phase high-entropy alloy: phase evolution and wear features

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Rare Metals 2024年第1期43卷 324-333页

作者： Hao Ren Rui-run Chen Xue-Feng Gao Tong Liu Gang Qin Yu-Lung Chiu shi-Ping Wu Jing-Jie Guo National Key Laboratory for Precision Hot Processing of Metals School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China School of Metallurgy and Materials University of BirminghamEdgbastonBirmingham B152TTUK

Initially defined high entropy alloys(HEAs)usually exhibit a single-phase solid-solution structure.However,two and/or more types of phases in HE As possibly induce the desired microstructure features,which contribute to improving the wear properties of HE As.Here,we prepare a series of(AlCoCrFeNi)_(100-x)Hf_(x)(x=0,2,4and 6;at%) HEAs and concern their phase compositions,micro structures and wear properties.Hf leads to the formation of(Ni,Co)_(2)Hf-type Laves phase and tailors the microstructure from a body-centered cubic(BCC) singlephase structure to a hypoeutectic structure.An increased hardness from~HV 512.3 to~HV 734.1 is due to solid-solution strengthening,grain refinement strengthening and precipitated phase strengthening.And a few oxides(Al_(2)O_(3)+Cr_(2)O_(3)) caused by the wear heating contribute to an 85.5% decrease in wear rate of the HEA system from6.71×10^(-5) to 0.97×10^(-5) m^(3)·N^(-1)·m^(-1).In addition,Hf addition changes the wear mechanism from abrasive wear,mild oxidative wear and adhesive wear to oxidative wear and adhesive wear.

关键词： High entropy alloy Laves phase Hardness Wear mechanism

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Introduction of rare-earth element Sc in alloy design to modify wear features of dual-phase high-entropy alloy

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Rare Metals 2024年第2期43卷 817-828页

作者： Hao Ren Rui-run Chen Xue-Feng Gao Tong Liu Gang Qin Yu-Lung Chiu shi-Ping Wu Jing-Jie Guo Guo National Key Laboratory for Precision Hot Processing of Metals School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin150001China School of Metallurgy and Materials University of BirminghamBirminghamB152TTUK

Tailoring the alloy composition,which induces the hard secondary phase to increase hardness and strength to improve the wear features,is a feasible approach for developing wear-resistant metal materials.Here,a group of(AlCoCrFeNi)_(100–x)Sc_(x)(x=0–2.0,at%)high-entropy alloys(HEAs)are designed and the phase compositions and wear behaviors are explored.Sc-doped HEA series contain the primary body-centered cubic(BCC)and eutectic phases,in which the eutectic phase is composed of the alternately grown BCC and Laves phases.Sc addition promotes the diffusion of Ni atoms from BCC phase to form the Sc-rich Laves phase at the grain boundaries.Vickers hardness increases due to solid solution strengthening and second phase strengthening.And the second phase strengthening plays a more significant role relative to solid solution strengthening.Laves phase and the oxides caused by wear heating prevent the direct contact between friction pair and HEAs,thus inducing a decreased wear rate from 6.82×10^(−5) to 3.47×10^(−5)m^(3)·N^(−1)·m^(−1).Moreover,the wear mechanism changes from adhesive wear,abrasive wear and oxidative wear to abrasive wear and oxidative wear.

关键词： High entropy alloy(HEA) Laves phase Hardness Wear mechanism

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Coupling of electrons and inertial Alfven waves in the top-side ionosphere

Coupling of electrons and inertial Alfven waves in the top-s...

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中国空间科学学会空间物理学专业委员会第十五届全国日地空...

作者： run shi Huixin Liu A.Yoshikawa Beichen Zhang Binbin Ni Department of Earth and Planetary Sciences Kyushu University SOA Key Laboratory for Polar Science Polar Research Institute of China Department of Atmospheric and Oceanic Sciences UCLALos AngelesCAU.S.A

A one dimensional kinetic model is constructed to simulate the electron acceleration by inertial Alfven waves.The electrons are divided into cold and hot electrons and treated separately.Cold components are described by the fluid equation and hot ones by the Vlasov equation,both carrying field-aligned currents.Intense variation of Alfven speed has been introduced by inclusion of cold electrons.The model results show that the exponential decrease of the plasma density plays a key role,which leads to the sharp gradient of both Alfven velocity and electron inertial length.When Alfven waves encounter this sharp gradient at lower altitudes,the electrons accelerated by the waves become super-Alfvenic,and the width of burst structures becomes much wider than the electron inertial length.Consequently,the background electrons carry the oppositely field-aligned current due to plasma oscillation.It is demonstrated that the current carried by the electrons exceeding the wave front is balanced by the reverse current carried by background electrons.This mechanism can be used to reasonably explain observations of the electron bursts accompanied by little net field-aligned current.Furthermore,our simulation indicates another type of Alfven wave reflection due to mirror force and wave particle interaction.

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