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Nano Research 2020年第4期13卷 952-958页

作者： Xiaoming Zheng Xueao Zhang Yuehua Wei Jinxin Liu Hang Yang Xiangzhe Zhang Shitan Wang Haipeng Xie chuyun deng Yongli Gao Han Huang Hunan Key Laboratory of Super-microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha 410083China College of Arts and Science National University of Defense TechnologyChangsha 410073China College of Physical Science and Technology Xiamen UniversityXiamen 361005China Department of Physics and Astronomy University of RochesterRochesterNY 14627USA

Doping can improve the band alignment at the metal-semiconductor interface to modify the corresponding Schottky barrier,which is crucial for the realization of high-performance logic ***,we systematically investigated a convenient and effective method,ultraviolet ozone treatment,for p-type doping of MoTe2 field-effect transistors to enormously enhance the corresponding electrical *** resulted hole concentration and mobility are near 100 times enhanced to be〜1.0×10^13 cm^-2 and 101.4 cm^2/(V·s),respectively,and the conductivity is improved by 5 orders of *** values are comparable to the highest ones ever obtained via annealing doping or non-lithographic fabrication methods at room *** with the pristine one,the photoresponsivity(522 mA/W)is enhanced approximately 100 *** excellent performances can be attributed to the sharply reduced Schottky barrier because of the surface charge transfer from MoTe2 to MoOx(x<3),as proved by photoemission ***,the p-doped devices exhibit excellent stability in ambient *** findings show significant potential in future nanoelectronic and optoelectronic applications.

关键词： MoTe2 ultraviolet ozone surface charge transfer Schottky barrier air stable hole doping

Highly in-plane anisotropy of thermal transport in suspended ternary chalcogenide Ta_(2)NiS_(5)

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Nano Research 2022年第7期15卷 6601-6606页

作者： Yue Su chuyun deng Jinxin Liu Xiaoming Zheng Yuehua Wei Yangbo Chen Wei Yu Xiao Guo Weiwei Cai Gang Peng Han Huang Xueao Zhang College of Physical Science and Technology Xiamen UniversityXiamen 361005China College of Arts and Sciences National University of Defense TechnologyChangsha 410073China College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China Jiujiang Research Institute of Xiamen University Jiujiang 332105China Hunan Key Laboratory of Super-microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha 410083China Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China

Energy dissipation has always been an attention-getting issue in modern electronics and the emerging low-symmetry two-dimensional(2D)materials are considered to have broad prospects in solving the energy dissipation *** the thermal transport of a typical 2D ternary chalcogenide Ta_(2)NiS_(5) is *** the first time we have observed strongly anisotropic in-plane thermal conductivity towards armchair and zigzag axes of suspended few-layer Ta_(2)NiS_(5) flakes through Raman *** 7-nm-thick Ta_(2)NiS_(5) flakes,theκz i g z a g is 4.76 W·m^(−1)·K^(−1) andκa r m c h a i r is 7.79 W·m^(−1)·K^(−1),with a large anisotropic ratio(κa r m c h a i r/κz i g z a g)of 1.64 mainly ascribed to different phonon mean-free-paths along armchair and zigzag ***,the thickness dependence of thermal anisotropy is also *** the flake thickness increases,theκa r m c h a i r/κz i g z a g reduces sharply from 1.64 to *** could be attributed to the diversity in phonon boundary scattering,which decreases faster in zigzag direction than in armchair *** anisotropic property enables heat flow manipulation in Ta_(2)NiS_(5) based devices to improve thermal management and device *** work helps reveal the anisotropy physics of ternary transition metal chalcogenides,along with significant guidance to develop energy-efficient next generation nanodevices.

关键词： anisotropic thermal conductivity ternary transition metal chalcogenide Ta_(2)NiS_(5) energy dissipation phonon mode

Highly anisotropic thermal conductivity of few-layer CrOCl for efficient heat dissipation in graphene device

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Nano Research 2022年第10期15卷 9377-9385页

作者： Xiaoming Zheng Yuehua Wei Zhenhua Wei Wei Luo Xiao Guo Xiangzhe Zhang Jinxin Liu Yangbo Chen Gang Peng Weiwei Cai Shiqiao Qin Han Huang chuyun deng Xueao Zhang College of Physical Science and Technology Xiamen UniversityXiamen 361005China College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China College of Arts and Sciences National University of Defense TechnologyChangsha 410073China Hunan Key Laboratory of Super-microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha 410083China Jiujiang Research Institute of Xiamen University Jiujiang 332105China

With the packing density growing continuously in integrated electronic devices,sufficient heat dissipation becomes a serious ***,dielectric materials with high thermal conductivity have brought insight into effective dissipation of waste heat in electronic devices to prevent them from overheating and guarantee the performance *** CrOCl,an antiferromagnetic insulator with low-symmetry crystal structure and atomic level flatness,might be a promising solution to the thermal ***,we have systematically studied the thermal transport of suspended few-layer CrOCl flakes by microRaman *** CrOCl flakes exhibit high thermal conductivities along zigzag direction,from~392±33 to~1,017±46 W·m^(−1)·K^(−1) with flake thickness from 2 to 50 ***,pronounced thickness-dependent thermal conductivity ratio(/from~2.8±0.24 to~4.3±0.25)has been observed in the CrOCl flakes,attributed to the discrepancy of phonon dispersion and phonon surface *** a demonstration to the heat sink application of layered CrOCl,we then investigate the energy dissipation in graphene devices on CrOCl,SiO_(2) and hexagonal boron nitride(h-BN)substrates,*** graphene device temperature rise on CrOCl is only 15.4%of that on SiO_(2) and 30%on h-BN upon the same electric power density,indicating the efficient heat dissipation of graphene device on *** study provides new insights into two-dimentional(2D)dielectric material with high thermal conductivity and strong anisotropy for the application of thermal management in electronic devices.

关键词： CrOCl High thermal conductivity strong anisotropy efficient heat dissipation heat sink graphene devices

Anisotropic in-plane thermal conductivity for multi-layer WTe_(2)

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Nano Research 2022年第1期15卷 401-407页

作者： Yuehua Wei chuyun deng Xiaoming Zheng Yangbo Chen Xiangzhe Zhang Wei Luo Yi Zhang Gang Peng Jinxin Liu Han Huang Weiwei Cai Qi Ge Renyan Zhang Xueao Zhang Shiqiao Qin College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China College of Arts and Sciences National University of Defense TechnologyChangsha 410073China College of Physical Science and Technology Xiamen UniversityXiamen 361005China Hunan Key Laboratory of Super-microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha 410083China Chongqing 2D Materials Institute Liangjiang New AreaChongqing 400714China

Improving thermal transport between substrate and transistors has become a vital solution to the thermal challenge in *** 2D WTe_(2) has sparked extensive interest because of heavy atomic mass and low Debye ***,the thermal transport of supported WTe_(2) was studied via Raman thermometry with electrical *** supported 30 nm WTe2 encased with 70 nm Al_(2)O_(3) delivered 4.8 W·m^(-1)·K^(-1)in-plane thermal conductivity along zigzag direction at room temperature,which was almost 1.6 times larger than that along armchair direction(3.0 W·m^(-1)·K^(-1)).Interestingly,the superior and inferior directions for thermal transport are just opposite of those for electrical ***,a heat manipulation model in WTe_(2) FET device was *** the designed configuration,waste heat in WTe_(2) would be mostly dissipated to metal contacts located along zigzag,relieving the local temperature discrepancy in the channel effectively and preventing degradation or *** study provides new insight into thermal transport of anisotropic 2D materials,which might inspire energy-efficient nanodevices in the future.

关键词： WTe_(2) anisotropy in-plane thermal conductivity Raman thermometry with electrical heating Raman spectrum

Effect of graphene grain boundaries on MoS2/graphene heterostructures

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Chinese Physics B 2020年第6期29卷 44-48页

作者： Yue Zhang Xiangzhe Zhang chuyun deng Qi Ge Junjie Huang Jie Lu Gaoxiang Lin Zekai Weng Xueao Zhang Weiwei Cai College of Physical Science and Technology Xiamen UniversityXiamen 361005China College of Arts and Science National University of Defense TechnologyChangsha 410073China Chongqing 2D Materials Institute Chongqing 400714China

The grain boundaries of graphene are disordered topological defects,which would strongly affect the physical and chemical properties of *** this paper,the spectral characteristics and photoresponse of MoS2/graphene heterostructures are *** is found that the blueshift of the G and 2D peaks of graphene in Raman spectrum is due to *** lattice mismatch at the graphene boundaries results in a blueshift of MoS2 features in the photoluminescence spectra,comparing to the MoS2 grown on *** addition,the photocurrent signal in MoS2/hexagonal single-crystal graphene heterostructures is successfully captured without bias,but not in MoS2/polycrystalline graphene *** electron scattering at graphene grain boundaries affects the optical response of MoS2/graphene *** photoresponse of the device is attributed to the optical absorption and response of MoS2 and the high carrier mobility of *** findings offer a new approach to develop optoelectronic devices based on two-dimensional material heterostructures.

关键词： photoresponse heterostructures grain-boundary

“互联网+”背景下大学生班级自主管理机制探究

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创新创业理论研究与实践 2019年第5期2卷 177-178页

作者：邓楚云中山大学新华学院

新时代随着我国互联网高速发展,在以人为本的教育理念下,高校大学生的自主管理方式有了许多创新。如何运用好互联网思维模式,对大学生班级自主管理机制创新具有重要意义。班集体作为学生自主管理的重要组织架构,大学生自主管理机制的完... 详细信息

新时代随着我国互联网高速发展,在以人为本的教育理念下,高校大学生的自主管理方式有了许多创新。如何运用好互联网思维模式,对大学生班级自主管理机制创新具有重要意义。班集体作为学生自主管理的重要组织架构,大学生自主管理机制的完善,对于培养大学生的自我教育、自我管理能、自我服务、自我监督有着重要作用。本文通过对'互联网+'背景下大学生班级的自主管理机制的探究,为新时代高校大学生班级自主管理提供理论参考。

关键词： “互联网+” 大学教育班级自主管理易班平台建设

Growth behaviors and emission properties of Co-deposited MAPbI_(3) ultrathin films on MoS_(2)

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Chinese Physics B 2023年第1期32卷 553-558页

作者：游思雯邵子依郭晓蒋俊杰刘金鑫王凯李明君欧阳方平邓楚芸宋飞孙家涛黄寒 Hunan Key Laboratory of Super-Microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha 410083China College of Arts and Science National University of Defense TechnologyChangsha 410073China Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201000China School of Information and Electronics MIIT Key Laboratory for Low-Dimensional Quantum Structure and DevicesBeijing Institute of TechnologyBeijing 100081China

Hybrid organic–inorganic perovskite thin films have attracted much attention in optoelectronic and information fields because of their intriguing properties. Due to quantum confinement effects, ultrathin films in nm scale usually show special properties. Here, we report on the growth of methylammonium lead iodide(MAPbI_(3)) ultrathin films via co-deposition of PbI_2 and CH_3NH_3I(MAI) on chemical-vapor-deposition-grown monolayer MoS_(2) as well as the corresponding photoluminescence(PL) properties at different growing stages. Atomic force microscopy and scanning electron microscopy measurements reveal the MoS_(2) tuned growth of MAPbI_(3) in a Stranski–Krastanov mode. PL and Kelvin probe force microscopy results confirm that MAPbI_(3) /MoS_(2) heterostructures have a type-Ⅱ energy level alignment at the interface. Temperaturedependent PL measurements on layered MAPbI_(3) (at the initial stage) and on MAPbI_(3) crystals in averaged size of 500 nm(at the later stage) show rather different temperature dependence as well as the phase transitions from tetragonal to orthorhombic at 120 and 150 K, respectively. Our findings are useful in fabricating MAPbI_(3) /transition-metal dichalcogenide based innovative devices for wider optoelectronic applications.

关键词： MAPbI_(3)/MoS_(2)heterostructure Co-deposition temperature-dependent photoluminescence growth behavior

新时代民办高校基层党建工作的问题及对策探究

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创新创业理论研究与实践 2019年第7期2卷 150-151页

作者：邓楚云李杏余中山大学新华学院

十九大以来,在党中央提出'全面从严治党'的背景下,民办高校的基层党建工作非常重要,如何在民办高校中充分发挥党的政治核心作用,实现高校基层党组织战斗堡垒力量具有十分重要的意义。本文通过新时代背景下,从三个方面对民办高校基层党... 详细信息

十九大以来,在党中央提出'全面从严治党'的背景下,民办高校的基层党建工作非常重要,如何在民办高校中充分发挥党的政治核心作用,实现高校基层党组织战斗堡垒力量具有十分重要的意义。本文通过新时代背景下,从三个方面对民办高校基层党建工作的问题及对策进行分析,并结合新时代民办高校现阶段的管理水平,创新党建工作新方法和新思路,为新时代基层党建工作提供理论参考。

关键词：民办高校基层党建创新新媒体

Preventing surface passivation of transition metal nanoparticles in oxygen electrocatalyst to extend the lifespan of Zn-air battery

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Journal of Materials Science & Technology 2022年第33期128卷 205-212页

作者： Zhuo Peng Changcun Han chuyun Huang Zehua Dong Xinguo Ma Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy School of ScienceHubei University of Technology(HBUT)Wuhan 430068China Hubei Key Laboratory of Material Chemistry and Service Failure Key laboratory of Material Chemistry for Energy Conversion and Storage(Ministry of Education)School of Chemistry and Chemical EngineeringHuazhong University of Science and Technology(HUST)Wuhan 430074China

Prolonging the lifespan of oxygen catalysts in Zn-air batteries was urgently required for the potential ***,two interactional active species were integrated into porous N-doped carbon microspheres(Co-Fe-Ru/PNCS)to act as bifunctional oxygen *** to the electron transfer from Ru to Co/Fe element,the high value state of Ru could promote OER performance and reduce the charge voltage of the *** extended cycle stability of 200 h was achieved in Co-Fe-Ru/PNCS-based ***,the quasi in-situ potentiodynamic sweep of air-electrode in battery cell confirmed it was the incorporation of Ru that avoided the passivation of Co/Fe-based ***,this novel electrocatalyst may provide a new strategy of designing durable bifunctional oxygen electrocatalyst for Zn-air batteries.

关键词： Prussian blue analogous Bifunctional electrocatalysts Zn-air batteries Quasi in-situ electrochemical tests

New insights into pathogen‑mediated modulation of host RNA splicing

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Stress Biology 2022年第1期2卷 284-286页

作者： chuyun Gao Suomeng Dong Department of Plant Pathology and Key Laboratory of Plant Immunity Nanjing Agricultural UniversityNanjing 210095China

Alternative splicing(AS)regulation of pre-mRNA has been proven to be one of the fundamental layers of plant immune *** pathogens disrupt plant AS process to suppress plant immunity by secreted effectors remain poorly *** the recent study,Gui et *** that a previously identified effector PSR1 of Phytophthora interferes with host RNA splicing machinery to modulate small RNA biogenesis,leading to compromised plant *** study provided a novel insight into the importance of AS process during pathogen-host interactions.

关键词： pre-mRNA splicing plant-microbe interaction effector splicing factor