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Spray pyrolysis-derived W-doped MoSe_(2)/rGO paper-like microspheres:optimization of microstructure and mesostructure for enhanced lithium storage

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Rare Metals 2024年第7期43卷 3019-3031页

作者： Wei Wang Jun-Yu Chen Jie Ouyang Hong Yin ao-Jie li liang Chen Jun-lin Huang Yu-Can Zhu Gang-Yong li Zhao-Hui Hou Key Laboratory of Hunan Province for Advanced Carbon-based Functional Materials Hunan Institute of Science and TechnologyYueyang 414006China School of Chemistry and Chemical Engineering Hunan Institute of Science and TechnologyYueyang414006China Hunan Province Key Laboratory of Materials Surface&Interface Science and Technology Material Science and Engineering SchoolCentral South University of Forestry and TechnologyChangsha 410004China International Iberian Nanotechnology Laboratory(INL) AvMestre Jose Veiga4715-330 BragaPortuga

Two-dimensional MoSe_(2) is a promising candidate for lithium-ion battery ***,its conductivity and lithium storage volumetric effect still need to be *** this work,W-doped MoSe_(2)/rGO paper-like microspheres are successfully prepared through ultrasonic spray pyrolysis,achieving optimization at both the microstructure and mesostructure to enhance the lithium storage performance of the ***,by utilizing the similar two-dimensional structure between MoSe_(2) and rGO,self-assembly is achieved through spray pyrolysis,resulting in a well-defined van der Waals heterostructure at the interface on the microscale,enhancing the electron and ion transfer capability of the ***,the mesoscale paper-like microsphere morphology provides additional volume expansion buffering ***,W-doping not only increases the interlayer spacing of MoSe_(2)(0.73 nm),thereby reducing the diffusion resistance of li+,but also allow for the modulation of the energy band structure of the *** functional theory(DFT)calculations confirm that W-doped MoSe_(2)/rGO exhibits the narrowest bandgap(0.892 eV).Therefore,the composite demonstrates excellent lithium storage performance,maintaining a specific capacity of 732.9 mAh·g^(-1)after 300 cycles at a current density of 1 A·g^(-1).

关键词： Molybdenum selenide Heterostructure Microspheres li-ion batteries Kinetics

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A micro-spectrometer with phase modulation array

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Frontiers of Optoelectronics 2014年第1期7卷 59-63页

作者： Tao YANG Yuchao CHEN Xing'ao li Wei HUANG Yongyuan ZHU Key Laboratory for Organic Electronics & Information Displays Nanjing University of Posts and Telecommunications Nanjing 210023 China National Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 China

A micro-spectrometer with phase modulation array is investigated in this paper. The vital component of this micro-spectrometer is a micro-interferometer array, which is built on a charge-coupled device （CCD） or a complementary metal oxide semiconductor （CMOS）. Each element of micro-interferometer array is formed by polymethyl methacrylate （PMMA） grooves with different depth. When we illuminate the surface of the interferom- eter array, different interference intensity distribution would be formed at the bottom of each micro-interferom- eter. Optical power of this by the pixels of CCD substituted into a linear interferometer can be measured or CMOS. The data can be system. By solving the linear system with Tikhonov regularization method, spectrum of the incident beam can be reconstructed. Simulation results prove that the detection range of the spectrometer is a wide wavelength range covering from 300 to 1100 nm. Furthermore, the wavelength resolution of the device reaches picometer level. In comparison with conventional spectrometers, the novel spectrometer has distinct advan- tages of small size, low cost, high resolution, wide spectral measurement range, real-time measurement, and so on.

关键词： micro-spectrometer spectrum reconstruction,Tikhonov regularization

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Perfection of Perovskite Grain Boundary Passivation by Rhodium Incorporation for Efficient and Stable Solar Cells

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Nano-Micro Letters 2020年第9期12卷 203-213页

作者： Wei liu Nanjing liu Shilei Ji Hongfeng Hua Yuhui Ma Ruiyuan Hu Jian Zhang liang Chu Xing’ao li Wei Huang Institute of Advanced Materials and New Energy Technology Engineering Laboratory of Jiangsu Province Nanjing University of Posts and Telecommunications(NUPT)Nanjing 210023People’s Republic of China Shaanxi Institute of Flexible Electronics Northwestern Polytechnical UniversityXi’an 710072People’s Republic of China Guangdong Provincial Key Lab of Nano‑Micro Materials Research School of Chemical Biology and BiotechnologyPeking University Shenzhen Graduate SchoolShenzhen 518055People’s Republic of China

Organic cation and halide anion defects are omnipresent in the perovskite films,which will destroy perovskite electronic structure and downgrade the properties of *** passivation in halide perovskites is crucial to the application of solar ***,tiny amounts of trivalent rhodium ion incorporation can help the nucleation of perovskite grain and passivate the defects in the grain boundaries,which can improve efficiency and stability of perovskite solar *** first-principle calculations,rhodium ion incorporation into the perovskite structure can induce ordered arrangement and tune *** experiment,rhodium ion incorporation with perovskite can contribute to preparing larger crystalline and uniform film,reducing trap-state density and enlarging charge carrier *** optimizing the content of 1% rhodium,the devices achieved an efficiency up to 20.71% without obvious hysteresis,from 19.09% of that pristine *** addition,the unencapsulated solar cells maintain 92% of its initial efficiency after 500 h in dry *** work highlights the advantages of trivalent rhodium ion incorporation in the characteristics of perovskite solar cells,which will promote the future industrial application.

关键词： Perovskite solar cells Grain boundary passivation Rhodium incorporation

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Synthesis of Polycrystalline Diamond Compact with Selenium:Discovery of a New Se–C Compound

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Chinese Physics Letters 2020年第5期37卷 102-105页

作者： Wen-Dan Wang ao li Guo-Heng Xu Pei Wang Yue-Gao liu li-Ping Wang School of Physical Science and Technology Southwest Jiaotong UniversitChengdu 610031 Materials Research Center Institute of Modern PhysicsChinese Acadermy of SciencesLanzhou 730000 Academy for Advanced Interdisciplinary Studies Southern University of Science and Technology(SUSTech)Shenzhen 518055 CAS Key Laboratory for Experimental Study under Deep-Sea Extreme Conditions Institute of Deep-Sea Science and EngineeringChinese Academy of SciencesSanya 572000

Sintering of polycrystalline diamond with selenium was investigated under pressure of 6.5-10.5 GPa at a constant temperature of 1850℃.A new carbon-selenium compound with a most plausible chemical formula of SeC and a WC-type hexagonal structure(space group P6m2)has been discovered in the recovered samples sintered at 10.5 GPa and 1850℃.Refined lattice parameters are as follows:a=2.9277(4)A,c=2.8620(4)A,V=21.245(4)A^*** diamond compacts hot-pressed at 10.5 GPa have excellent mechanical properties with a Vickers hardness of about 68 GPa at a loading force of 19.6 *** intergrowths observed in these samples may have benefited from the catalytic effects of Se/SeC on the nucleation and crystal growth of diamond.

关键词： Diamond hexagonal Vickers

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Blue light is more essential than red light for maintaining the activities of photosystem Ⅱ and Ⅰ and photosynthetic electron transport capacity in cucumber leaves

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Journal of Integrative Agriculture 2016年第1期15卷 87-100页

作者： MIao Yan-xiu W ANG Xiao-zhuo G ao li-hong C HEN Qing-yun QU Mei Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops College of Agriculture and Biotechnology China Agricultural UniversityBeijing 100193P.R.China

Blue and red lights differently regulate leaf photosynthesis. Previous studies indicated that plants under blue light generally exhibit better photosynthetic characteristics than those under red light. However, the regulation mechanism of related photosynthesis characteristics remains largely unclear. Here, four light qualities treatments （300 μmol m-2 s-1） including white fluorescent light （FL）, blue monochromatic light （B, 440 nm）, red monochromatic light （R, 660 nm）, and a combination of red and blue light （RB, R：B=8：1） were carried out to investigate their effects on the activity of photosystem II （PSII） and photosystem I （PSI）, and photosynthetic electron transport capacity in the leaves of cucumber （Cucumis sativus L.） seedlings. The results showed that compared to the FL treatment, the R treatment significantly limited electron transport rate in PSII （ETR11） and in PSI （ETR1） by 79.4 and 66.3%, respectively, increased non-light induced non-photochemical quenching in PSII （q^No） and limitation of donor side in PSI （φND） and reduced most JIP-test parameters, suggesting that the R treatment induced suboptimal activity of photosystems and inhibited electron transport from PSII donor side up to PSI. However, these suppressions were effectively alleviated by blue light addition （RB）. Compared with the R treatment, the RB treatment significantly increased ETR, and ETR1 by 176.9 and 127.0%, respectively, promoted photosystems activity and enhanced linear electron transport by elevating electron transport from QA to PSI. The B treatment plants exhibited normal photosystems activity and photosynthetic electron transport capacity similar to that of the FL treatment. It was concluded that blue light is more essential than red light for normal photosynthesis by mediating photosystems activity and photosynthetic electron transport capacity.

关键词： cucumber photosystem II photosystem I electron transport

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High-precision nuclear magnetic resonance probe suitable for in situ studies of high-temperature metallic melts

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Chinese Physics B 2022年第4期31卷 48-55页

作者： ao li Wei Xu Xiao Chen Bing-Nan Yao Jun-Tao Huo Jun-Qiang Wang Run-Wei li CAS Key Laboratory of Magnetic Materials and Devices and Zhejiang Province Key Laboratory of Magnetic Materials and Application TechnologyNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

High-temperature nuclear magnetic resonance(NMR)has proven to be very useful for detecting the temperatureinduced structural evolution and dynamics in ***,the sensitivity and precision of high-temperature NMR probes are *** we report a sensitive and stable high-temperature NMR probe based on laser-heating,suitable for in situ studies of metallic melts,which can work stably at the temperature of up to 2000 *** our design,a well-designed optical path and the use of a water-cooled copper radio-frequency(RF)coil significantly optimize the signal-to-noise ratio(S/NR)at high ***,a precise temperature controlling system with an error of less than±1 K has been *** temperature calibration,the temperature measurement error is controlled within±2 *** a performance testing,^(27)Al NMR spectra are measured in Zr-based metallic glass-forming liquid in *** show that the S/NR reaches 45 within 90 s even when the sample's temperature is up to 1500 K and that the isothermal signal drift is better than0.001 ppm per *** high-temperature NMR probe can be used to clarify some highly debated issues about metallic liquids,such as glass transition and liquid-liquid transition.

关键词： high-temperature NMR probe laser beams temperature measurement metallic melts

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liquid crystal droplets formation and stabilization during phase transition process

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Chinese Physics B 2024年第11期33卷 106-111页

作者： Xia Meng Jiayao Ye ao li Xudong Zhu Zhaoyan Yang Lei Wang Bingxiang li Yanqing Lu College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology) Nanjing University of Posts and TelecommunicationsNanjing 210023China National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesNanjing UniversityNanjing 210093China

The study of phase transition processes in liquid crystals(LCs)remains *** thermotropic LCs exhibit a narrow temperature range and a rapid phase transition from the isotropic(ISO)to the nematic(N)phase,which make it difficult to capture and manipulate the phase transition *** this study,we observed the evolution of small droplets during the ISO–N phase transition in ferroelectric nematic(NF)LC *** doping with metal nanoparticles(NPs),the temperature range of the phase transition broadened,and the droplets formed during the phase transition remained stable,with their diameter increasing linearly with *** addition,droplets doped with NPs can be well controlled by an external electric *** discovery not only aids in understanding the fundamental mechanisms of LC phase transitions but also provides a simple alternative method for preparing droplets,which is potentially valuable for applications in optoelectronic devices and sensors.

关键词： liquid crystal droplets phase transition process metal nanoparticles

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Early warning of core network capacity in space-terrestrial integrated networks

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Journal of Systems Engineering and Electronics 2024年第4期35卷 855-864页

作者： HAN Sai li ao ZHANG Dongyue ZHU Bin WANG Zelin WANG Guangquan MIao Jie MA Hongbing China Unicom Research Institute Beijing 100044China China United Network Communications Group Company limited Beijing 100033China

With the rapid development of low-orbit satellite com-munication networks both domestically and internationally,space-terrestrial integrated networks will become the future development *** space and terrestrial networks with limi-ted resources,the utilization efficiency of the entire space-terres-trial integrated networks resources can be affected by the core network *** order to improve the response efficiency of core networks expansion construction,early warning of the core network elements capacity is *** on the inte-grated architecture of space and terrestrial network,multidimen-sional factors are considered in this paper,including the number of terminals,login users,and the rules of users’migration during *** artifical intelligence(AI)technologies,the regis-tered users of the access and mobility management function(AMF),authorization users of the unified data management(UDM),protocol data unit(PDU)sessions of session manage-ment function(SMF)are predicted in combination with the num-ber of login users,the number of ***,the core network elements capacity can be predicted in *** proposed method is proven to be effective based on the data from real network.

关键词： space-terrestrial integrated networks core network element capacity artificial intelligent(AI)

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High-performance carbon-electrode-based self-powered optoelectronic synaptic devices

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Science China(Information Sciences) 2024年第5期67卷 339-340页

作者： Wen HUANG Xuwen XIA Huixing ZHANG Tenglong GUO Pengjie HANG Bin li Jiawei TANG Biao li Chen ZHU Lei WANG Deren YANG Xuegong YU Xing'ao li Jiangsu Provincial Engineering Research Center of Low Dimensional Physics and New Energy & School of Science Nanjing University of Posts and Telecommunications College of Integrated Circuit Science and Engineering Nanjing University of Posts and Telecommunications State Key Laboratory of Silicon and Advanced Semiconductor Materials Zhejiang University

A two-terminal self-powered optoelectronic structure could mimic synaptic functions of a human brain synapse unit(Figure 1(a)) based on the photovoltaic effects [1], demonstrating the potential for decreasing energy consumption for future computing. However, current self-powered optoelectronic synaptic devices face issues of stability and cost,which mainly arise from noble metal electrodes and independent hole transport layers used in these structures. Substituting low-cost carbon for these metal electrodes and carrier transport layers may promise to solve these challenges.

关键词： electrode devices carbon high based optoelectronic performance self-powered synaptic

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Effects of Paranosema locustae(Microsporidia) on the development and morphological phase transformation of Locusta migratoria(Orthoptera: Acrididae) through modulation of the neurotransmitter taurine

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Journal of Integrative Agriculture 2020年第1期19卷 204-210页

作者： li ao-mei YIN Yue ZHANG Yu-xin ZHANG liu ZHANG Kai-qi SHEN Jie TAN Shu-qian SHI Wang-peng Department of Entomology and MOA Key Lab of Pest Monitoring and Green Management College of Plant ProtectionChina Agricultural University

Neurotransmitters are important in the maintenance of phase transformation of Locusta migratoria(Arthropoda: Orthoptera). Here, the effects of the entomopathogen Paranosema locustae on the neurotransmitter taurine in migratory locusts were studied using biochemical methods. After inoculation with P. locustae, the taurine content of infected locusts significantly declined, but F/C values(ratio between the length of hind femur and the width of the head of locust) increased significantly, compared to healthy locusts. Meanwhile, F/C values of infected locusts that were injected with 2 μg of taurine showed no significant differences from those of healthy locusts, demonstrating that supplemental taurine inhibited the changes in morphological phase caused by P. locustae. Paranosema locustae infection also caused longer developmental durations and lower body weights of locusts, but these changes were unaffected after injection with taurine. These results provided new insights into the mechanisms by which microsporidian parasites affected their locust hosts.

关键词： Locusta migratoria Paranosema locustae neurotransmitter taurine morphological characteristics

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