|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Unravelling the complexity in achieving the 17 sustainable-development goals显示文摘It is now more than 3 years since the ratification of the 2030 Agenda for Sustainable Development framework[1]but,according to the latest progress report,unless the rate of progress increases,it is challenging that all of the Sustainable Development Goals(SDGs)will be achieved by 2030[2].With only 11 years remaining until the 2030 deadline,it has become imperative to develop a plan of action to enable the full agenda to be realized.Specifically,there is an urgent need for a holistic approach to clarify the interrelationships between the 17 SDGs,while also taking into account their complexity and their sometimes mutually reinforcing or conflicting nature.Trying to achieve these goals separately in succession is nonsensical,but pursuing them simultaneously is impractical[3]. | Bojie Fu Shuai Wang Junze Zhang Zengqian Hou Jinghai Li | 2019 | National Science Review2019，6，3： | 32 |
| 2 | Self-trapped excitons in two-dimensional perovskites显示文摘With strong electron-phonon coupling,the self-trapped excitons are usually formed in materials,which leads to the local lattice distortion and localized excitons.The self-trapping strongly depends on the dimensionality of the materials.In the three dimensional case,there is a potential barrier for self-trapping,whereas no such barrier is present for quasi-one-dimensional systems.Two-dimensional(2D)systems are marginal cases with a much lower potential barrier or nonex istent potential barrier for the self-trapping,leading to the easier formation of self-trapped states.Self-trapped excitons emission exhibits a broadband emission with a large Stokes shift below the bandgap.2D perovskites are a class of layered structure material with unique optical properties and would find potential promising optoelectronic.In particular,self-trapped excitons are present in 2D per-ovskites and can significantly influence the optical and electrical properties of 2D perovskites due to the soft characteristic and strong electron-phonon interaction.Here,we summarized the luminescence characteristics,origins,and characterizations of self-trapped excitons in 2D perovskites and finally gave an introduction to their applications in optoelectronics. | Junze LI Haizhen WANG Dehui LI | 2020 | Frontiers of Optoelectronics2020，13，3： | 4 |
| 3 | Fabrication and Characterization of Ni-Al_2O_3 Nano-Composite Coatings by Sediment Co-Deposition显示文摘Ni-Al2O3 nano-composite coatings were fabricated by sediment co-deposition (SCD) from Watt’s type electrolyte containing nano-Al2O3 particles without any additives. For comparison, Ni-Al2O3 nano-composite coatings were prepared by conventional electro-plating (CEP) under experimental conditions. Effects of process parameters, such as nano-Al2O3 concentration in plating solution, current density, stirring rate, and bath temperature, on nano-Al2O3 content in composite coatings were investigated. The distribution of elements in deposit, and the bonding strength between coating and substrate was analyzed by electron probe microanalyzer (EPMA) and auto-scratch apparatus, respectively. It is found that the nano-Al2O3 concentration in plating solution, current density and stirring rate are three main factors affecting the particles content in deposit, and played a key role in the formation of composite coatings. The nano-Al2O3 content in composite coatings increased with increasing of nano-Al2O3 concentration in plating solution, current density and stirring rate to reach a maximum value, and then reduced slightly. The contents of nano-Al2O3 particles in composite coatings by the SCD technique were higher than that by the CEP technique. The co-deposited nano-Al2O3 particles embedded uniformly in the Ni matrix. The coating was well adhesion with substrate. It is demonstrated that the SCD technique is an efficient approach for improving the nano-Al2O3 content in Ni-Al2O3 composite coatings. | Feng Qiuyuan Zhang Jian Li Tingju Qi Kai Zhang Xiaoli Teng Haitao Zhang Yu Liu Changsheng Jin Junze | 2009 | 稀有金属材料与工程2009，38，A03： | 2 |
| 4 | KRAS mutation-induced EndMT of brain arteriovenous malformation is mediated through the TGF-β/BMP-SMAD4 pathway显示文摘Objective Somatic KRAS mutations have been identified in the majority of brain arteriovenous malformations(bAVMs),and subsequent in vivo experiments have confirmed that KRAS mutation in endothelial cells(ECs)causes AVMs in mouse and zebrafish models.Our previous study demonstrated that the KRASG12D mutant independently induced the endothelial-mesenchymal transition(EndMT),which was reversed by treatment with the lipid-lowering drug lovastatin.However,the underlying mechanisms of action were unclear.Methods We used human umbilical vein ECs(HUVECs)overexpressing the KRASG12D mutant for Western blotting,quantitative real-time PCR,and immunofluorescence and wound healing assays to evaluate the EndMT and determine the activation of downstream pathways.Knockdown of SMAD4 by RNA interference was performed to explore the role of SMAD4 in regulating the EndMT.BAVM ECs expressing the KRASG12D mutant were obtained to verify the SMAD4 function.Finally,we performed a coimmunoprecipitation assay to probe the mechanism by which lovastatin affects SMAD4.Results HUVECs infected with KRASG12D adenovirus underwent the EndMT.Transforming growth factor beta(TGF-β)and bone morphogenetic protein(BMP)signalling pathways were activated in the KRASG12D-mutant HUVECs and ECs in bAVM tissue.Knocking down SMAD4 expression in both KRASG12D-mutant HUVECs and ECs in bAVM tissues inhibited the EndMT.Lovastatin attenuated the EndMT by downregulating p-SMAD2/3,p-SMAD1/5 and acetylated SMAD4 expression in KRASG12D-mutant HUVECs.Conclusions Our findings suggest that the KRASG12D mutant induces the EndMT by activating the ERK-TGF-β/BMP-SMAD4 signalling pathway and that lovastatin inhibits the EndMT by suppressing TGF-β/BMP pathway activation and SMAD4 acetylation. | Hongyuan Xu Ran Huo Hao Li Yuming Jiao Jiancong Weng Jie Wang Zihan Yan Junze Zhang Shaozhi Zhao Qiheng He Yingfan Sun Shuo Wang Yong Cao | 2023 | Stroke & Vascular Neurology2023，8，3： | 1 |
| 5 | A PHENOMENOLOGICAL MODEL FOR GRAIN BOUNDARY PRECIPITATION STRENGTHENING IN HIGH TEMPERATURE CREEP显示文摘Considering the effect of intergranular carbides density,a modified model has been proposedto try to suit any common case of the fraction of intergranular carbides to total grain bounda-ry less than I,on the basis of the previous model for the grain boundary precipitation strengthening.This modified model may by avilable to predict the changesin creep rate and its stress and temperature dependence of alloys due to intergrnular carbides. | LI Peien ZHANG Junshan JIN Junze Dalian University of Technology,Dalian,China Ph.D.,Dept.of Materials Engineering,Dalian University of Technology,Dalian 116024,China | 1991 | Acta Metallurgica Sinica(English Letters)1991，4，1： | 1 |
| 6 | Surface depletion field in 2D perovskite microplates: Structural phase transition, quantum confinement and Stark effect显示文摘Surface depletion field would introduce the depletion region near surface and thus could significantly alter the optical,electronic and optoelectronic properties of the materials,especially low-dimensional materials.Two-dimensional(2D)organic—inorganic hybrid perovskites with van der Waals bonds in the out-of-plane direction are expected to have less influence from the surface depletion field;nevertheless,studies on this remain elusive.Here we report on how the surface depletion field affects the structural phase transition,quantum confinement and Stark effect in 2D(BA)2PbI4 perovskite microplates by the thickness-,temperature-and power-dependent photoluminescence(PL)spectroscopy.Power dependent PL studies suggest that high-temperature phase(HTP)and low-temperature phase(LTP)can coexist in a wider temperature range depending on the thickness of the 2D perovskite microplates.With the decrease of the microplate thickness,the structural phase transition temperature first gradually decreases and then increases below 25 nm,in striking contrast to the conventional size dependent structural phase transition.Based on the thickness evolution of the emission peaks for both high-temperature phase and low-temperature phase,the anomalous size dependent phase transition could probably be ascribed to the surface depletion field and the surface energy difference between polymorphs.This explanation was further supported by the temperature dependent PL studies of the suspended microplates and encapsulated microplates with graphene and boron nitride flakes.Along with the thickness dependent phase transition,the emission energies of free excitons for both HTP and LTP with thickness can be ascribed to the surface depletion induced confinement and Stark effect. | Wancai Li Chen Fang Haizhen Wang Shuai Wang Junze Li Jiaqi Ma Jun Wang Hongmei Luo Dehui Li | 2019 | Nano Research2019，12，11： | 1 |
| 7 | Recent advances of Rh-based intermetallic nanomaterials for catalytic applications显示文摘Rhodium(Rh)has received widespread attention in fundamental catalytic research and numerous industrial catalytic applications.Compared to homogeneous catalysts,Rh-based nanomaterials as heterogeneous catalysts are much easier to separate and collect after usage,making them more suitable for commercial use.To this purpose,there has been a constant demand in constructing stable and highly active Rh-based nanomaterials.In contrast to Rh-based solid solutions with a random distribution of metallic atoms in the lattice,Rh-based intermetallic compounds(IMCs)with a fixed stoichiometric ratio and an ordered atomic arrangement can ensure the homogenous distribution of active sites and structural stability in the catalytic process.In this review,we concentrate on the fabrication of Rh-based IMCs for catalytic applications.Various synthetic methods and protocols for the controlled preparation of Rh-based IMC are illustrated.Meanwhile,the catalytic applications and corresponding catalytic mechanisms are discussed.In addition,personal perspectives about the remaining challenges and prospects in this field are provided.We believe this review will be useful in directing the development of Rh-based IMC catalysts for heterogeneous catalysis. | Lijie Zhu Chunhai Li Qinbai Yun Sumei Han Yong Lv Qipeng Lu Junze Chen | 2023 | Chinese Chemical Letters2023，34，11： | 0 |
| 8 | An electron donor-acceptor photoactivation strategy for the synthesis of S-aryl dithiocarbamates using thianthrenium salts under mild aqueous micellar conditions显示文摘An eco-friendly and convenient method is developed herein for the synthesis of S-aryl dithiocarbamates via visible-light-induced SET process of an EDA complex between thianthrenium salt functionalized arenes and dithiocarbamate anions under mild aqueous micellar conditions.This strategy indirectly realizes the method for constructing S-aryl dithiocarbamates through site-selective C−H functionalization of arenes.Most importantly,the reaction proceeded smoothly without addition of any photocatalyst,and the by-product thianthrene is recycled in quantity,ultimately minimizing the production of chemical waste.This protocol provides a promising synthesis candidate for the construction of valuable S-aryl dithiocarbamates,which also opens up a new avenue for micellar photocatalysis. | Hao Xu Xufeng Li Jie Ma Junze Zuo Xiuyan Song Jian Lv Daoshan Yang | 2023 | Chinese Chemical Letters2023，34，11： | 0 |
| 9 | Anti-Markovnikov ring-opening of sulfonium salts with alkynes by visible light/copper catalysis显示文摘Internal alkynes are widespread skeletons in bioactive molecules and materials which are also used as important building blocks in chemical synthesis. Herein, we report a novel and efficient copper-catalyzed Sonogashira reaction between sulfonium salts and alkynes through an anti-Markovnikov ring-opening pathway promoted by visible light. The coexistence of the nitrogen and phosphorus ligands in the system is the key to the success of this reaction. This radical type ring-opening reaction affords a new strategy for the synthesis of internal alkynes. Furthermore, this study is also an effective complement to the diverse reaction patterns of sulfonium salts. | Xuan Li Min Jiang Junze Zuo Xiuyan Song Jian Lv Daoshan Yang | 2023 | Science China Chemistry2023，66，3： | 0 |
| 10 | Realtime prediction of hard rock TBM advance rate using temporal convolutional network(TCN)with tunnel construction big data显示文摘Real-time dynamic adjustment of the tunnel bore machine(TBM)advance rate according to the rockmachine interaction parameters is of great significance to the adaptability of TBM and its efficiency in construction.This paper proposes a real-time predictive model of TBM advance rate using the temporal convolutional network(TCN),based on TBM construction big data.The prediction model was built using an experimental database,containing 235 data sets,established from the construction data from the Jilin Water-Diversion Tunnel Project in China.The TBM operating parameters,including total thrust,cutterhead rotation,cutterhead torque and penetration rate,are selected as the input parameters of the model.The TCN model is found outperforming the recurrent neural network(RNN)and long short-term memory(LSTM)model in predicting the TBM advance rate with much smaller values of mean absolute percentage error than the latter two.The penetration rate and cutterhead torque of the current moment have significant influence on the TBM advance rate of the next moment.On the contrary,the influence of the cutterhead rotation and total thrust is moderate.The work provides a new concept of real-time prediction of the TBM performance for highly efficient tunnel construction. | Zaobao LIU Yongchen WANG Long LI Xingli FANG Junze WANG | 2022 | Frontiers of Structural and Civil Engineering2022，16，4： | 0 |
| 11 | Nonvolatile electrical switching of optical and valleytronic properties of interlayer excitons显示文摘Long-lived interlayer excitons(IXs)in van der Waals heterostructures(HSs)stacked by monolayer transition metal dichalcogenides(TMDs)carry valley-polarized information and thus could find promising applications in valleytronic devices.Current manipulation approaches for valley polarization of IXs are mainly limited in electrical field/doping,magnetic field or twist-angle engineering.Here,we demonstrate an electrochemical-doping method,which is efficient,in-situ and nonvolatile.We find the emission characteristics of IXs in WS2/WSe2 HSs exhibit a large excitonic/valley-polarized hysteresis upon cyclic-voltage sweeping,which is ascribed to the chemical-doping of O2/H2O redox couple trapped between WSe2 and substrate.Taking advantage of the large hysteresis,a nonvolatile valley-addressable memory is successfully demonstrated.The valley-polarized information can be non-volatilely switched by electrical gating with retention time exceeding 60 min.These findings open up an avenue for nonvolatile valley-addressable memory and could stimulate more investigations on valleytronic devices. | Tong Ye Yongzhuo Li Junze Li Hongzhi Shen Junwen Ren Cun-Zheng Ning Dehui Li | 2022 | Light(Science & Applications)2022，11，2： | 0 |
| 12 | EFFECT OF INTERGRANULAR CARBIDES ON CREEP RUPTURE PROPERTIES OF Fe-15Cr-25Ni ALLOY显示文摘The intergranular carbides may significantly increase rupture life and ductility of theFe-15Cr-25Ni alloy.This seems due to the grain boundary sliding and diffusion hindered byprecipitation of intergranular carbides,so the nucleation and growth rate of cracks or cavitiesare reduced. | LI Pei’en Shanghai Jiaotong University,Shanghai,ChinaYE Baorui ZHANG Junshan WANG Fugang JIN Junze Dalian University of Technology,Dalian,China | 1992 | Acta Metallurgica Sinica(English Letters)1992，5，4： | 0 |
| 13 | Research on horizontal electromagnetic continuous casting of copper tube blanks显示文摘The effect of commercial frequency electromagnetic field on the solidification structure and mechanical propertiesof copper hollow blanks prepared by horizontal continuous casting method was investigated. The results show thatwhen the electromagnetic field is imposed, columnar grains are evidently refined and fine equiaxed grains areobtained in the inner side of the cross-section. Moreover, with the increase of input current, the equiaxed grain regionwidens and the grains distribute more uniformly in the circumferential direction. Meanwhile, the mechanical properties areremarkably improved by the application of electromagnetic field. When the input current is 140 A, the tensile strengthincreases 15% and the elongation increases 10%. However, the electromagnetic field has no effect on the distribution ofmicroelements. | Xintao LI Tingju LI Qiulin LI Yanqin SONG Jinli ZHANG Junze JIN | 2005 | China Foundry2005，2，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员