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Giant pattern evolution in third-harmonic generation of strained monolayer WS2 at two-photon excitonic resonance

Nano Research 2020年第12期13卷 3235-3240页

作者： Jing Liang He Ma Jinhuan Wang Xu Zhou wentao yu Chaojie Ma Muhong Wu Peng Gao Kaihui Liu Dapeng yu State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics School of PhysicsPeking UniversityBeijing100871China Academy for Advanced Interdisciplinary Studies Collaborative Innovation Center of Quantum MatterPeking UniversityBeijing100871China School of Chemistry and Chemical Engineering Beijing Institute of TechnologyBeijing100081China International Center for Quantum Materials Electron Microscopy LaboratorySchool of PhysicsPeking UniversityBeijing100871China Shenzhen Institute for Quantum Science and Engineering and Department of PhysicsSouthern University of Science and TechnologyShenzhen518055China

Strong geometrical confinement and reduced dielectric screening of two-dimensional(2D)materials leads to strong Coulomb interaction and eventually give rise to extraordinary excitonic effects,which dominates the optical and optoelectronic properties.For nonlinear 2D photonic or optoelectronic applications,excitonic effects have been proved effective to tune the light-matter interaction strength.However,the modulation of excitonic effects on the other aspect of nonlinear response,i.e.,polarization dependence,has not been fully explored yet.Here we report the first systemic study on the modulation of excitonic effects on the polarization dependence of second and third harmonic generation(SHG and THG)in strained monolayer WS2 by varying excitation wavelength.We demonstrated that polarization-dependent THG patterns undergo a giant evolution near two-photon excitonic resonance,where the long-axis of the parallel component(originally parallel to the strain direction)has a 90°flip when the excitation wavelength increases.In striking contrast,no apparent variation of polarization-dependent SHG patterns occurs at either two-or three-photon excitonic resonance conditions.Our results open a new avenue to modulate the anisotropic nonlinear optical response of 2D materials through effective control of excitonic resonance states,and thus open opportunity for new designs and applications in nonlinear optoelectronic 2D devices.

关键词： two-dimensional materials nonlinear optics excitonic effects

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How do lateral septum projections to the ventral CA1 influence sociability?

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Neural Regeneration Research 2024年第8期19卷 1789-1801页

作者： Dan Wang Di Zhao wentao Wang Fengai Hu Minghu Cui Jing Liu Fantao Meng Cuilan Liu Changyun Qiu Dunjiang Liu Zhicheng Xu Yameng Wang yu Zhang Wei Li Chen Li Department of Rehabilitation Medicine Binzhou Medical University HospitalBinzhouShandong ProvinceChina Medical Research Center Binzhou Medical University HospitalBinzhouShandong ProvinceChina Institute for Metabolic&Neuropsychiatric Disorders Binzhou Medical University HospitalBinzhouShandong ProvinceChina Department of Psychology Binzhou Medical University HospitalBinzhouShandong ProvinceChina College of Nursing Binzhou Medical UniversityBinzhouShandong ProvinceChina

Social dysfunction is a risk factor for several neuropsychiatric illnesses.Previous studies have shown that the lateral septum(LS)-related pathway plays a critical role in mediating social behaviors.Howeve r,the role of the connections between the LS and its downstream brain regions in social behavio rs remains unclea r.In this study,we conducted a three-chamber test using electrophysiological and chemogenetic approaches in mice to determine how LS projections to ventral CA1(vCA1)influence sociability.Our res ults showed that gamma-aminobutyric acid(GABA)-e rgic neuro ns were activated following social experience,and that social behavio rs were enhanced by chemogenetic modulation of these neurons.Moreover,LS GABAergic neurons extended their functional neural connections via vCA1 glutamatergic pyramidal neurons,and regulating LSGABA→vCA1Gluneural projections affected social behaviors,which were impeded by suppressing LSprojecting vCA1 neuronal activity or inhibiting GABAAreceptors in vCA1.These findings support the hypothesis that LS inputs to the vCA1 can control social prefe rences and social novelty behaviors.These findings provide new insights rega rding the neural circuits that regulate sociability.

关键词： chemogenetics GABA receptor GABAergic neurons glutamatergic neurons lateral septum neural excitability neural projection social novelty social preference ventral CA1

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Emerging Geography of Creativity and Labor Productivity Effects in China

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China & World Economy 2013年第5期21卷 78-99页

作者： wentao yu Jin Hong Yanrui Wu Dingtao Zhao Jing Qiu School of Management University of Science and Technology of China Business School University of Western Australia

The paper presents an alternative approach to explain why regional productivity is different across regions by utilizing the creative class approach in China. First, we analyze the extent of spatial agglomeration of the creative class across regions in China. Second, we develop a model with spatial externalities to investigate how the concentration of the creative class can promote regional productivity. Our analysis confirms the importance of spatial agglomeration of the creative class in stimulating regional productivity. The results also imply that regional productivity is greater in markets with higher levels of innovation, capital stock, manufacturing and urbanization. In light of the results of our analysis, we discuss a number of policy implications.

关键词： China creative class agglomeration creativity regional labor productivity spatial externality

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Unexpected Diversity in Ecosystem Nutrient Responses to Experimental Drought in Temperate Grasslands

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Phyton-International Journal of Experimental Botany 2024年第4期93卷 831-841页

作者： Biying Qiu Niwu Te Lin Song yuan Shi Chuan Qiu Xiaoan Zuo Qiang yu Jianqiang Qian Zhengwen Wang Honghui Wu wentao Luo School of Life Sciences Hebei UniversityBaoding071002China Liaoning Northwest Grassland Ecosystem National Observation and Research Station Erguna Forest-Steppe Ecotone Research StationInstitute of Applied EcologyChinese Academy of SciencesShenyang110164China Northwest Institute of Eco-Environment and Resources Chinese Academy of SciencesLanzhou730030China School of Grassland Science Beijing Forestry UniversityBeijing100083China College of Forestry Henan Agricultural UniversityZhengzhou450002China State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing100081China Key Laboratory of Arable Land Quality Monitoring and Evaluation Ministry of Agriculture and Rural AffairsInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing100081China

The responses of ecosystem nitrogen (N) and phosphorus (P) to drought are an important component of globalchange studies. However, previous studies were more often based on site-specific experiments, introducing a significantuncertainty to synthesis and site comparisons. We investigated the responses of vegetation and soil nutrientsto drought using a network experiment of temperate grasslands in Northern China. Drought treatment (66%reduction in growing season precipitation) was imposed by erecting rainout shelters, respectively, at the driest,intermediate, and wettest sites. We found that vegetation nutrient concentrations increased but soil nutrient concentrationsdecreased along the aridity gradient. Differential responses were observed under experimentaldrought among the three grassland sites. Specifically, the experimental drought did not change vegetation andsoil nutrient status at the driest site, while strongly reduced vegetation but increased soil nutrient concentrationsat the site with intermediate precipitation. On the contrary, experimental drought increased vegetation N concentrationsbut did not change vegetation P and soil nutrient concentrations at the wettest site. In general, the differentialeffects of drought on ecosystem nutrients were observed between manipulative and observationalexperiments as well as between sites. Our research findings suggest that conducting large-scale, consistent, andcontrolled network experiments is essential to accurately evaluate the effects of global climate change on terrestrialecosystem bio-geochemistry.

关键词： Climate change drought experiment precipitation nutrient cycles

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Protective Effect of Buyang Huanwu Decoction on Cerebral Ischemia/Reperfusion Injury by Inhibiting Autophagy Based on AMPK/UIK1Signaling Pathway

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Journal of Integrative Medicine（双语） 2022年第2期11卷 9-28页

作者： Ruijuan Zhang Yanmeng Zhao Xiujuan Ma Jiabei Ye yudong Shan wentao yu Xiaohong Zhou Weijuan Gao Hebei University of Chinese Medicine No.3Xingyuan RoadLuquan DistrictShijiazhuangHebei050200China

The aim of the paper is to explore whether AMPK/U1K1 signaling pathway is involved in regulating autophagy and alleviating cerebral ischemia/reperfusion(I/R)injury.On this basis,study the regulatory effect of Buyang Huanwu Decoction(BHD)on AMPK/U1K1 signaling pathway,aiming to clarify the molecular mechanism of BHD in alleviating cerebral I/R injury and the protective effect of BHD containing serum(BHDS)on OGD/R neurons.The research group adopted the following methods:Neurons cultured for 7 days in vitro were randomly divided into normal control group,model group(OGD/R),AMPK activator(AICAR)group(3 mmol/L),Buyang Huanwu Decoction medicated serum(BHDS)group(3%),Buyang Huanwu Decoction medicated serum+AMPK activator(BHDS+AICAR)group.The protein expressions of p-AMPK,AMPK,p-UlKl,U1K1,Beclin-1 and LC3B in neurons were detected by Western blot,the fluorescence intensity and apoptosis rate of neuron autophagosome CYTO-ID staining were detected by flow cytometry,the fluorescence intensity and morphological changes of neuron LC3B were detected by immunofluorescence double labeling method,the morphological changes of neurons were observed by inverted microscope,and the survival rate of neurons was detected by CCK-8 method.Neuron OGD/R model and the optimal concentration of BHDS.The neurons in the model group were subjected to hypoxia and glucose deprivation for 1 h,2 h,3 h,4 h and reoxygenation and glucose deprivation for 24 h.The survival rate of neurons and the release rate of 1DH to determine whether the model was successfully established.And the results show that BHDS group,the survival rate of OGD/R neurons was significantly increased,and the apoptosis rate was significantly decreased.Among them,3%BHDS intervention at the same time of hypoxia glucose deprivation for 3 h and reoxygenation glucose for 24 h was the best condition.In BHDS group,the levels of p-AMPK/AMPK,p-UlKl/UlKl,beclin-1,CYTO-ID and LC3B fluorescence intensity,and the transformation from LC3B-I to LC3B-II of OGD/R neurons were significantly decreased.

关键词： BHDS Drug containing serum Traditional Chinese medicine Signal pathway Cell damage

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Research progress on three different types of noncoding RNAs related to ionizing radiation

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Radiation Medicine and Protection 2021年第2期2卷 83-87页

作者： Jin Gao Xumin Zong Na Chen Tingxi Lan wentao yu Huiqiang Long Fengmei Cui yu Tu State Key Laboratory of Radiation Medicine and Protection Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsDepartment of Radiation MedicineSchool of Radiation Medicine and ProtectionSoochow UniversitySuzhou 215123China

Non-coding RNAs(ncRNAs)have attracted wide attention in the field of ionizing radiation(IR).They have been found to be involved in cell development,proliferation,differentiation,and apoptosis in both clinical radiotherapy and radiation protection studies.Despite the production of an increasing number of relevant reports in recent years,the molecular mechanisms involved are yet to be clearly understood.In the last few years,ncRNAs have received a lot of research attention,especially microRNAs,long noncoding RNAs,and circular RNAs,which have a well-known association with the development of human disease and are closely related to the biological phenotypic changes caused by IR.With recent developments of research methods,these ncRNAs might play a significant regulatory role in future radiation protection and radiotherapy.This review will summarize the research progress of various types of ncRNAs as biomarkers of IR and potential new targets for radiotherapy,aiming to provide references for future research and the formulation of new strategies.

关键词： MicroRNA Circular RNA Long noncoding RNA Ionizing radiation

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Quantum Spin Exchange Interactions to Accelerate the Redox Kinetics in Li–S Batteries

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Nano-Micro Letters 2024年第5期16卷 370-383页

作者： yu Du Weijie Chen yu Wang yue yu Kai Guo Gan Qu Jianan Zhang Key Laboratory of Advanced Energy Catalytic and Functional Materials Preparation of Zhengzhou City College of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001People’s Republic of China

Spin-engineering with electrocatalysts have been exploited to suppress the“shuttle effect”in Li–S batteries.Spin selec-tion,spin-dependent electron mobility and spin potentials in activation barriers can be optimized as quantum spin exchange interactions lead-ing to a significant reduction of the electronic repulsions in the orbitals of catalysts.Herein,we anchor the MgPc molecules on fluorinated carbon nanotubes(MgPc@FCNT),which exhibits the single active Mg sites with axial displacement.According to the density functional theory calculations,the electronic spin polarization in MgPc@FCNT not only increases the adsorption energy toward LiPSs intermediates but also facilitates the tunneling process of electron in Li–S batter-ies.As a result,the MgPc@FCNT provides an initial capacity of 6.1 mAh cm^(-2) even when the high sulfur loading is 4.5 mg cm^(-2),and still maintains 5.1 mAh cm^(-2) after 100 cycles.This work provides a new perspective to extend the main group single-atom catalysts enabling high-performance Li–S batteries.

关键词： Metal phthalocyanines Spin polarization Electrocatalysis Li–S batteries

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平台经济生态下制造业企业的生存之道——规模扩张抑或技术创新

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产业经济评论 2022年第6期 19-36页

作者：余文涛杜博涵福州大学经济与管理学院

在平台经济生态背景下,制造业企业的生产和经营方式呈现出向数字化、网络化、智能化转型发展。本文采用121家A股制造业上市公司2015−2019年的面板数据,实证考察了制造业企业电商平台应用对企业绩效的影响及作用机理。研究发现,电商平台... 详细信息

在平台经济生态背景下,制造业企业的生产和经营方式呈现出向数字化、网络化、智能化转型发展。本文采用121家A股制造业上市公司2015−2019年的面板数据,实证考察了制造业企业电商平台应用对企业绩效的影响及作用机理。研究发现,电商平台应用显著提升了制造业企业绩效。机制分析发现,电商平台应用有利于促进制造业企业产销规模扩大,在规模经济带动下,企业绩效水平得到了显著提升,但是,其技术创新的影响机制却缺乏显著性。究其原因可能在于:平台经济增强了制造业全行业的竞争效应和匹配效应,为此,制造业企业开始寻求低成本的规模扩张之路,但是却忽视了或无暇顾及具有远期战略意义的技术创新。在使用替换变量法和工具变量法后,上述实证结果仍然是稳健的。本研究对于平台经济生态下如何激励制造业企业转型发展具有启发意义。

关键词：平台经济制造业企业规模经济技术创新

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Light People:Professor Laura Na Liu

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Light(Science & Applications) 2024年第2期13卷 184-189页

作者： Hui Wang Cun yu Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of Sciences130033ChangchunChina

Editorial The DNA nanotechnology outlines a new chapter in biological sciences,opening a new era of scientific and technological advancements.A pioneer of DNA nanotechnology,Professor Liu from the University of Stuttgart in Germany,our latest Light People,has been working at the interface,where nanophotonics meets biology and chemistry.On the path of scientific explorations.

关键词： chemistry. advancement pioneer

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Macroporous Directed and Interconnected Carbon Architectures Endow Amorphous Silicon Nanodots as Low‑Strain and Fast‑Charging Anode for Lithium‑Ion Batteries

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Nano-Micro Letters 2024年第5期16卷 333-351页

作者： Zhenwei Li Meisheng Han Peilun yu Junsheng Lin Jie yu Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems Shenzhen Engineering Lab for Supercapacitor MaterialsSchool of Material Science and EngineeringHarbin Institute of TechnologyShenzhenUniversity TownShenzhen 518055People’s Republic of China Songshan Lake Materials Laboratory Dongguan Dongguan 523808GuangdongPeople’s Republic of China Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518055People’s Republic of China

Fabricating low-strain and fast-charging silicon-carbon composite anodes is highly desired but remains a huge challenge for lithium-ion batteries.Herein,we report a unique silicon-carbon composite fabricated by uniformly dis-persing amorphous Si nanodots(SiNDs)in carbon nanospheres(SiNDs/C)that are welded on the wall of the macroporous carbon framework(MPCF)by vertical graphene(VG),labeled as MPCF@VG@SiNDs/C.The high dispersity and amor-phous features of ultrasmall SiNDs(~0.7 nm),the flexible and directed electron/Li+transport channels of VG,and the MPCF impart the MPCF@VG@SiNDs/C more lithium storage sites,rapid Li+transport path,and unique low-strain property during Li+storage.Consequently,the MPCF@VG@SiNDs/C exhibits high cycle stability(1301.4 mAh g^(-1) at 1 A g^(-1) after 1000 cycles without apparent decay)and high rate capacity(910.3 mAh g^(-1),20 A g^(-1))in half cells based on industrial electrode standards.The assembled pouch full cell delivers a high energy density(1694.0 Wh L^(-1);602.8 Wh kg^(-1))and an excellent fast-charging capability(498.5 Wh kg^(-1),charging for 16.8 min at 3 C).This study opens new possibilities for preparing advanced silicon-carbon com-posite anodes for practical applications.

关键词： Amorphous Si nanodots Low-strain Fast-charging Lithium-ion batteries

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