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PdSe_(2)/MoSe_(2) vertical heterojunction for self-powered photodetector with high performance

Nano Research 2022年第3期15卷 2489-2496页

作者： jiahong zhong Biao Wu Yassine MADOUNE Yunpeng Wang Zongwen Liu Yanping Liu School of Physics and Electronics Hunan Key Laboratory for Super-microstructure and Ultrafast ProcessCentral South UniversityChangsha 410083China State Key Laboratory of High-Performance Complex Manufacturing Central South UniversityChangsha 410083China School of Chemical and Biomolecular Engineering The University of SydneyNSW 2006Australia The University of Sydney Nano Institute The University of SydneyNSW 2006Australia Shenzhen Research Institute of Central South University A510aVirtual University BuildingSouthern DistrictHigh-tech Industrial ParkYuehai StreetNanshan DistrictShenzhen 518057China

Van der Waals’two-dimensional(2D)material heterostructure engineering offers an effective strategy for the design of multifunctional and high-performance optoelectronic ***,2D heterostructure photodetectors with a photoconductive effect tend to suffer from high driving source-drain voltages and significant dark noise ***,a self-powered photodetector with high performance was fabricated based on vertically stacked graphene/MoSe_(2)/PdSe_(2)/graphene heterojunctions through a dry transfer *** fabricated device displays current rectification characteristics in darkness(on/off ratio>10^(3))and superior photovoltaic behaviors under *** addition,benefitting from the strong built-in field,the Gr/PdSe_(2)/MoSe_(2)/Gr heterojunction photodetector is able to respond to a broad spectrum from visible to near-infrared(NIR)with a remarkable responsivity of 651 mA·W^(−1),a high specific detectivity of 5.29×10^(11) Jones and a fast response speed of 41.7/62.5μ***,an enhanced responsivity of 1.16 A·W^(−1) has been obtained by a reverse voltage(−1 V)and further evaluation on image recognition has also demonstrated the great application potential of the Gr/MoSe_(2)/PdSe_(2)/Gr heterojunction *** findings are expected to bring new opportunities for the development of highly sensitive,high-speed and energy-efficient photodetectors for comprehensive applications.

关键词： heterostructure MoSe_(2) PdSe_(2) self-powered photodetector high performance

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Observation of double indirect interlayer exciton in MoSe_(2)/WSe_(2) heterostructure

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Nano Research 2022年第3期15卷 2661-2666页

作者： Biao Wu Yunpeng Wang jiahong zhong Cheng Zeng Yassine Madoune Wanting Zhu Zongwen Liu Yanping Liu School of Physics and ElectronicsHunan Key Laboratory for Super-microstructure and Ultrafast Process Central South University932 South Lushan RoadChangshaHunan 410083China State Key Laboratory of High-Performance Complex Manufacturing Central South University932 South Lushan RoadChangshaHunan 410083China School of Chemical and Biomolecular Engineering The University of SydneyNSW 2006Australia The University of Sydney Nano Institute The University of SydneyNSW 2006Australia Shenzhen Research Institute of Central South University A510aVirtual University BuildingSouthern DistrictHigh-tech Industrial ParkYuehai StreetNanshan DistrictShenzhen 518057China

Interlayer excitons(IXS)are electron–hole pairs bound in the spatial separation layer by the Coulomb effect,and their lifetime is several orders of magnitude longer than that of direct excitons,providing an essential platform for long-lived exciton *** recent emergence of the van der Waals heterostructure(HS),which combines two layers of different transitional metal dichalcogenides(TMDs),has created new opportunities for IX ***,we demonstrate the observation of double indirect interlayer excitons in the MoSe_(2)/WSe_(2)HS using photoluminescence(PL)*** intensities of the two peaks are essentially the same,and the energy difference is 22 meV,which is perfectly in line with the calculation result of density functional ***,the experience of variable excitation power also proves that the splitting of the IXs originates from the conduction band spin-splitting of MoSe_(2).The observation results provide a promising platform for further exploring the new physical properties and optoelectronic phenomena of TMD HS.

关键词： transitional metal dichalcogenides heterostructure interlayer exciton photoluminescence density functional theory

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数字经济下平台个性化定价的反垄断规制

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市场周刊 2024年第7期37卷 173-176页

作者：钟佳宏青岛科技大学法学院山东青岛266061

数字经济的发展大大促进了平台了解客户支付意愿的能力,可通过算法对个体消费者的购物偏好与支付意愿进行建模与预测,完成精准的用户画像。平台通过用户画像为用户制订个性化的价格,削弱消费者信任、损害消费者的隐私权和选择权并产生... 详细信息

数字经济的发展大大促进了平台了解客户支付意愿的能力,可通过算法对个体消费者的购物偏好与支付意愿进行建模与预测,完成精准的用户画像。平台通过用户画像为用户制订个性化的价格,削弱消费者信任、损害消费者的隐私权和选择权并产生垄断风险。我国需要针对平台个性化定价构建反垄断规制体系。

关键词：数字经济个性化定价算法反垄断

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Spintronics in Two-Dimensional Materials

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Nano-Micro Letters 2020年第7期12卷 192-217页

作者： Yanping Liu Cheng Zeng jiahong zhong Junnan Ding Zhiming MWang Zongwen Liu School of Physics and Electronics Hunan Key Laboratory for Super-Microstructure and Ultrafast ProcessCentral South University932 South Lushan RoadChangsha 410083HunanPeople’s Republic of China Shenzhen Research Institute of Central South University A510aVirtual University BuildingSouthern DistrictHigh-Tech Industrial ParkYuehai StreetNanshan DistrictShenzhenPeople’s Republic of China State Key Laboratory of High-Performance Complex Manufacturing Central South University932 South Lushan RoadChangsha 410083HunanPeople’s Republic of China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054People’s Republic of China School of Chemical and Biomolecular Engineering The University of SydneySydneyNSW 2006Australia

Spintronics,exploiting the spin degree of electrons as the information vector,is an attractive field for implementing the beyond Complemetary metal-oxide-semiconductor(CMOS)***,two-dimensional(2D)materials have been drawing tremendous attention in spintronics owing to their distinctive spin-dependent properties,such as the ultralong spin relaxation time of graphene and the spin-valley locking of transition metal ***,the related heterostructures provide an unprecedented probability of combining the di erent characteristics via proximity e ect,which could remedy the limitation of individual 2D ***,the proximity engineering has been growing extremely fast and has made significant achievements in the spin injection and ***,there are still challenges toward practical application;for example,the mechanism of spin relaxation in 2D materials is unclear,and the high-effciency spin gating is not yet *** this review,we focus on 2D materials and related heterostructures to systematically summarize the progress of the spin injection,transport,manipulation,and application for information storage and *** also highlight the current challenges and future perspectives on the studies of spintronic devices based on 2D materials.

关键词： Spintronics 2D materials TMDCs Heterostructure Proximity effect

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High-performance polarization-sensitive photodetector based on a few-layered PdSe2 nanosheet

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Nano Research 2020年第6期13卷 1780-1786页

作者： jiahong zhong Juan Yu Lingkai Cao Cheng Zeng Junnan Ding Chunxiao Cong Zongwen Liu Yanping Liu School of Physics and Electronics Hunan Key Laboratory for Super-microstructure and Ultrafast ProcessCentral South UniversityChangsha410083China School of Electronics and Information Hangzhou Dianzi UniversityHangzhou310018China School of Information Science and Technology Fudan UniversityShanghai200433China School of Chemical and Biomolecular Engineering The University of SydneySydneyNSW2006Australia Shenzhen Research Institute of Central South University Shenzhen518057China State Key Laboratory of High Performance Complex Manufacturing Central South UniversityChangsha410083China

The extraordinary optical and electronic properties of anisotropic two-dimensional materials,such as black phosphorus,ReS2,and GeSe,enable them a promising component of polarization-sensitive ***,these applications are significantly limited by the challenges of air-stability,response time,and linearly dichroic ***,palladium diselenide(PdSe2)with high air stability is an emerging material that has robust in-plane anisotropy induced by its asymmetric pentagonal lattice *** have successfully prepared a few-layer PdSe2 using micromechanical exfoliation,and here we demonstrate the strong linear dichroism behavior of PdSe2 by polarization-resolved absorption spectra *** unique linear dichroism,endows the PdSe2 photodetector powerful ability to detect polarized *** photodetector based on 5L PdSe2,as tested with polarization-dependent photocurrent mapping,exhibited competitive capability to detect polarized light,achieving a significant photocurrent on/off ratio(>10^2),the quite fast response time(<11 ms)and robust linearly dichroic ratios(/max//min≈1.9 at 532 nm).These results are essential advance in the development of polarization-sensitive photodetector,a crucial step towards opening up a new avenue for the application of 2D optoelectronic devices.

关键词： PdSe2 anisotropy polarization-sensitive linear dichroism

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PDE4 inhibition protects against rotenone-induced neurotoxicity through activation of the AMPK/Sirt1 pathway

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中国药理学与毒理学杂志 2023年第7期37卷 510-510页

作者： LONG Lu DONG Wenli zhong jiahong XU Jiangping WANG Haitao School of Pharmaceutical Sciences Southern Medical University

OBJECTIVE We have previously shown that inhibition of phosphodiesterase-4(PDE4) protects against neuronal damage in models of Parkinson′s disease(PD). However, the mechanisms have not yet been completely revealed. Here we aimed to elucidate the pharmacological effects and mechanisms of action of roflupram(ROF), an novel PDE4 inhibitor, in experimental models of PD. METHODS The survival rate, apoptosis rate and toxicity level of SH-SY5Y cells were determined by MTT, flow cytometry and lactate dehydrogenase detection kit. At the same time, LYT staining was used to detect the changes of lysosome fluorescence intensity: Western blotting was used to detect the changes of lysosome associated proteins, Sirtuin1 and α-Syn;NAD/NADH assay kit was used to determine the change of NAD content. To explore whether SIRT1 inhibitor(EX527) and lysosomal inhibitor could block the effect of ROF. In addition, ROT was used to stimulate C57BL/6J mice to construct a mouse model of PD to verify the effect and mechanism of ROF. The changes of motor function were evaluated by behavioral experiments(pole climbing, bar rotating and balance beam experiments). Superoxide dismutase kit and Western blotting were used to detect the changes of SOD activity and expression of related proteins in substantia nigra. RESULTS We showed that pretreatment with ROF significantly attenuated cell apoptosis in ROT-treated SH-SY5Y cells. Furthermore, ROF significantly enhanced the lysosomal function, as evidenced by the increased levels of mature cathepsin D(CTSD) and lysosomal-associated membrane protein 1(LAMP1) through increasing NAD+/NADH and the expression of sirtuin 1(SIRT1). Pretreatment with an SIRT1 inhibitor selisistat(SELI, 10 μ mol · L-1)attenuated the neuroprotection of ROF, and ROFincreased expression levels of LAMP1 and mature CTSD. Moreover, inhibition of CTSD by pepstatin A(20 μmol·L-1) attenuated the protective effects of ROF. In vivo study was conducted in mice exposed to ROT(10 mg · kg-1· d-1,

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Design and Realization of Control System for Warehouse based on MSCOMM Component

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International Journal of Technology Management 2013年第7期 109-111页

作者： jiahong zhong Yin Lei Gannan Medical University Ganzhou.Jiangxi.341000China

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The Design and Realization of Network Remote Control Based on Embedded Systems

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International Journal of Technology Management 2013年第5期 77-80页

作者： Yin Lei jiahong zhong Gannan Medical University GanzhouJiangxi341000China

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Multifunctional catalytic sites regulation of atomic-scale iridium on orthorhombic-CoSe_(2)for high efficiency dual-functional alkaline hydrogen evolution and organic degradation

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Journal of Energy Chemistry 2024年第5期92卷 271-281页

作者： Jingjing Huang Chenglin zhong Yanjie Xia Jia Liu Guizhen Li Chao Yang jiahong Wang Qian Wang Zhenbao Zhang Feng Yan Jianghua Wu Yu Deng Zhenjiang Zhou Xingchen He Paul K.Chu Woon-Ming Lau Xue-Feng Yu College of Chemistry and Chemical Engineering Linyi UniversityLinyi 276005ShandongChina Shenzhen Engineering Center for the Fabrication of Two-Dimensional Atomic Crystals Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongChina National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093JiangsuChina College of Biosystems Engineering and Food Science Zhejiang UniversityHangzhou 310058ZhejiangChina Department of Physics Department of Materials Science and EngineeringDepartment of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina

The earth-abundant and high-performance catalysts are crucial for commercial implementation of hydrogen evolution reaction(HER).Herein,a multifunctional site strategy to construct excellent HER catalysts by incorporating iridium(Ir)ions on the atomic scale into orthorhombic-CoSe2(Ir-CoSe_(2))was *** hydrogen evolution activity in alkaline media such as a low overpotential of 48.7 mV at a current density of 10 mA cm^(-2)and better performance than commercial Pt/C catalysts at high current densities were found in the Ir-CoSe_(2) *** the experiments and theoretical calculations,it was revealed that Ir enabled CoSe_(2)to form multifunctional sites to synergistically catalyze alkaline HER by promoting the adsorption and dissociation of H_(2)O(Ir sites)and optimizing the binding energy for H^(*)on Co *** was noticeable that the electrolytic system comprising the Ir-CoSe_(2)electrode not only produced hydrogen efficiently via HER,but also degraded organic pollutants(Methylene blue).The cell voltage of the dual-function electrolytic system was 1.58 V at the benchmark current density of 50 mA cm^(-2),which was significantly lower than the conventional water splitting *** was indicated that this method was a novel strategy for designing advanced HER electrocatalysts by constructing multifunctional catalytic sites for hydrogen production and organic degradation.

关键词： Orthorhombic-CoSe_(2) Multifunctional sites design Hydrogen evolution reaction Synergistically catalyze Methylene blue oxidation

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新型船用中高速机涡轮增压器自主研发现状及发展趋势

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柴油机 2023年第1期45卷 26-30页

作者：周黎钟佳宏王肖路刘扬袁小平重庆江增船舶重工有限公司重庆402284 船舶与海洋工程特种装备和动力系统国家工程研究中心重庆402284

在介绍国外先进船用涡轮增压器产品及技术的基础上,详细探讨我国在船用中高速机增压器的设计、制造等方面取得的技术突破。指出国产船用中高速机涡轮增压器技术经历了引进、消化吸收和自主研发的发展过程,到目前已逐步建立起较为全面的... 详细信息

在介绍国外先进船用涡轮增压器产品及技术的基础上,详细探讨我国在船用中高速机增压器的设计、制造等方面取得的技术突破。指出国产船用中高速机涡轮增压器技术经历了引进、消化吸收和自主研发的发展过程,到目前已逐步建立起较为全面的自主研发体系。展望国产船用中高速机涡轮增压器未来的发展方向以及主要的技术难点。

关键词：中高速机涡轮增压器压比两级增压

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