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Isomerization of B_6,B_6^- and B_6^+ clusters

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science china Chemistry 2010年第1期53卷 202-209页

作者： WEI GongMin1,PU ZhiFeng2,ZOU Rong3.LI GuoLiang2,3.& luo qiong2,3.1Department of Physics,Capital Normal University,Beijing 100048,china 2{3. key laboratory of explosion science and technology Beijing institute of technology,Beijing 100081,china 3.enter for Computational Quantum Chemistry,South{13. Normal University,Guangzhou 51063.,china 1. Department of Physics Capital Normal University Beijing 100048 China2. State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Beijing 100081 China3. Center for Computational Quantum Chemistry South China Normal University Guangzhou 510631 China

The interconversions between isomers with the same spin multiplicity of neutral B6 and charged B6-and B6+ clusters have been investigated at the B3.YP/6-3.1+G level of theory,including determination of the minimum energy pathways with transition states connecting the corresponding reactants and *** dynamic calculations,26 isomers were optimized,including 11 novel *** order to further refine the energies,single-point B3.YP/6-3.1+G(3.f) calculations were carried out on the corresponding B3.YP/6-3.1+G geometries of all isomers of B6,B6-and B6+ and the corresponding isomerization transition *** stability of each isomer of B6(singlet and triplet states),B6-(doublet state) and B6+(doublet state) was analyzed from both thermodynamic and dynamic viewpoints.

关键词： B6 transition state intrinsic reaction coordinate barrier height

Universal paradigm of ternary metacomposites with tunable epsilon-negative and epsilon-near-zero response for perfect electromagnetic shielding

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Rare Metals 2024年第2期43卷 796-809页

作者： Yun-Peng Qu Yun-Lei Zhou Yang luo Yao Liu Jun-Fei Ding Yan-Li Chen Xiu Gong Jing-Liang Yang qiong Peng Xiao-Si Qi College of Physics Guizhou UniversityGuiyang550025China Hangzhou institute of technology Xidian UniversityHangzhou311231China Department of Materials ETH Zurich8093ZurichSwitzerland key laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) Shandong UniversityJinan250061China

CaCu_(3.Ti_(4)O_(12)(CCTO)ceramic nanocomposites incorporating graphene–carbon black(GRCB)fillers were fabricated by spark plasma sintering *** percolative effects of conductive GRCB fillers on dielectric response of GRCB/CCTO ternary metacomposites were systematically *** weakly real permittivity(ε′)-negative response(ε′~−1×10^(2))was achieved which originated from weakly low-frequency plasmonic state of free carriers within constructed GRCB *** enhancing three-dimensional GRCB network,the plasma frequency of metacomposites increased while the damping factor ***,theε′-negative values of metacomposites were tuned from−10^(2) to−10^(4) orders of magnitude andε′-near-zero(ENZ)frequencies from~142 to~3.0 MHz which substantially benefited from the moderate carrier concentration of GRCB dual *** Drude model and equivalent circuit models were adopted to demonstrate dielectric and electrical *** obtained metacomposites show strong EM shielding effect along with enhanced plasmonic oscillation and even better achieving perfect EM shielding effect in ENZ *** work achieves the tunableε′-negative andε′-near-zero response and more importantly clarifies its regulation mechanism in ceramic-based ternary metacomposites,which opens up the possibility of designing high-performance EM shielding materials based on metacomposites.

关键词： Metacomposites Ceramic matrix composites Negative permittivity Epsilon-near-zero Electromagnetic shielding

一种用于大视场成像和偏振光谱探测的微型可重构超构光学系统

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Engineering 2024年第4期35卷 67-73页

作者： Fei Zhang Minghao Liao Mingbo Pu Yinghui Guo Lianwei Chen Xiong Li qiong He Tongtong Kang Xiaoliang Ma Yuan Ke Xiangang luo state key laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China National key laboratory of Optical Field Manipulation science and {3. Chinese Academy of SciencesChengdu 610209China School of Optoelectronics University of Chinese Academy of SciencesBeijing 100049China Research Center on Vector Optical Fields Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China Tianfu Xinglong Lake laboratory Chengdu 610299China

Wide-angle imaging and spectral detection play vital roles in tasks such as target tracking,object classification,and ***,limited by their intrinsically different architectures,as determined by frequency dispersion requirements,their simultaneous implementation in a shared-aperture system is ***,we propose a novel concept to realize reconfigurable dual-mode detection based on electrical-control tunable *** a proof-of-concept demonstration,the simultaneous implementation of wide-angle imaging and polarization-spectral detection in a miniature sharedaperture meta-optical system is realized for the first time via the electrical control of cascaded catenary-like *** proposed system supports the imaging(spectral)resolution of approximately 27.8 line-pairs per millimeter(lp·mm^(-1);~80 nm)for an imaging(spectral)mode from 8 to 14 μ*** system also bears a large field of view of about 70°,enabling multi-target recognition in both *** work may promote the miniaturization of multifunctional optical systems,including spectrometers and polarization imagers,and illustrates the potential industrial applications of meta-optics in biomedicine,security,space exploration,and more.

关键词： Metasurfaces Reconfigurable Imaging Spectral

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基于矢量光场的光学加工技术(特邀)

中国激光 2024年第12期51卷 191-205页

作者：许丽佳王青松付小芳张其何琼赵泽宇罗先刚中国科学院光电技术研究所微细加工光学技术国家重点实验室四川成都610209 电子科技大学自动化工程学院四川成都611731 中国科学院光电技术研究所光场调控科学技术全国重点实验室四川成都610209 中国科学院大学材料科学与光电技术学院北京100049 中国科学院光电技术研究所矢量光场研究中心四川成都610209

作为光的基本属性,偏振、振幅和相位提供的自由度对于光场调控具有重要作用。具有空间结构偏振态、振幅和相位分布的矢量光场因具有不同于传统光场的独特性质而被应用于诸多领域。近年来,时空分布特性更加丰富的新型矢量光场逐渐得到关... 详细信息

作为光的基本属性,偏振、振幅和相位提供的自由度对于光场调控具有重要作用。具有空间结构偏振态、振幅和相位分布的矢量光场因具有不同于传统光场的独特性质而被应用于诸多领域。近年来,时空分布特性更加丰富的新型矢量光场逐渐得到关注,它们的出现丰富了矢量光场的种类并提供了新的调控自由度,为光学加工带来了新的契机。综述了近年来发展迅速的基于矢量光场的光学加工技术,包括基于矢量光场的激光微纳制造和基于矢量光场曝光的几何相位液晶平面器件加工等技术,并对其发展趋势和前景进行了展望。

关键词：矢量光场光学加工激光微纳制造光场曝光液晶平面器件悬链线光学

Quality assurance of postharvest grapes against Botrytis cinerea by terbinafine

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Natural Products and Bioprospecting 2023年第1期13卷 502-513页

作者： Yun Zhao qiong Jin Zi-Jiao Wang Xing-Yu Tao Xiao-Dong luo state key laboratory of Phytochemistry and Plant Resources in West{3. Kunming Institute of BotanyChinese Academy of SciencesKunming 650201People’s Republic of China key laboratory of Medicinal Chemistry for Natural Resource Ministry of Education and Yunnan ProvinceYunnan Characteristic Plant Extraction LaboratorySchool of Chemical Science and TechnologyYunnan UniversityKunming 650500People’s Republic of China University of Chinese Academy of sciences Beijing 100049People’s Republic of China

Worldwide,fruit is an indispensable treasure house of nutrition for human beings,occupying a vital position of human *** fruit storage requires efficient antifungal agents to control Botrytis cinerea,which is a vital postharvest disease affecting fruit and leading to enormous ***,with the enormous abuse of existing antifungal drugs,the problem of drug-resistant fungi is imminent,making the controlling diseases caused by pathogenic fungi even more *** repurposing is an efficient alternative method,we evaluated a well-known antifungal chemical,terbinafine,against the agricultural pathogen,*** in vitro,as a result,terbinafine showed strong anti-fungal ***,the in vivo antifungal activity of terbinafine was evaluated,the results showed that terbinafine could reduce the decay area on *** could disrupt the cell membrane integrity,increase cell membrane permeability,and eventual cell death of *** addition,terbinafine reduced decay incidence,and weight loss and maintained the soluble solids,titratable acidity,ascorbic acid,total phenolic,and malondialdehyde content during the storage period of ***,terbinafine could be an antifungal preservative for postharvest table grapes fresh-keeping.

关键词： Terbinafine Botrytis cinerea Antifungal activity Cell membrane Grape preservation

General synthesis of hollow mesoporous conducting polymers by dual-colloid interface co-assembly for high-energy-density micro-supercapacitors

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Journal of Energy Chemistry 2021年第11期30卷 145-152,I0004页

作者： Jing Cui Fei-Fei Xing Hao luo Jie-qiong Qin Yan Li Yonghui Zhong Facai Wei Jianwei Fu Chengbin Jing Jiangong Cheng Zhong-Shuai Wu Shaohua Liu state key laboratory of Precision Spectroscopy and Department of Materials School of Physics and Electronic ScienceEast China Normal University500 Dongchuan RoadShanghai 200241China state key laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of Sciences457 Zhongshan RoadDalian 116023LiaoningChina Dalian National laboratory for Clean Energy Chinese Academy of Sciences457 Zhongshan RoadDalian 116023LiaoningChina University of Chinese Academy of sciences 19 A Yuquan RoadShijingshan DistrictBeijing 100049China School of Chemistry and Molecular Engineering East China Normal University500 Dongchuan RoadShanghai 200241China School of Materials science and Engineering Zhengzhou University100 Science AvenueZhengzhou 450002HenanChina state key Lab of Transducer technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences865 Changning RoadShanghai 200050China Shanghai Academy of Quality Management 258 Wuyi RoadShanghai 200050China

Rational design and precise regulation over the morphology, structure, and pore size of functional conducting mesoporous polymers with enriched active sites and shorten electron–ion transport pathway are extremely important for developing high-performance micro-supercapacitors (MSCs), but still remain a great challenge. Herein, a general dual-colloid interface co-assembly strategy is proposed to fabricate hollow mesoporous polypyrrole nano-bowls (mPPy-nbs) for high-energy-density solid-state planar MSCs. By simply adjusting the size of block copolymer micelles, the diameter of polystyrene nanospheres and the amount of pyrrole monomer, mesopore size of the shell, void and shell thickness of mPPy-nbs can be simultaneously controlled. Importantly, this strategy can be further utilized to synthesize other hollow mesoporous polymers, including poly(tris(4-aminophenyl)amine), poly(1,3.5-triaminobenzene) and their copolymers, demonstrative of excellent universality. The structurally optimized mPPy-nb exhibits high specific surface area of 122 m^(2) g^(−1)and large capacitance of 225 F g^(−1) at 1 mV s^(−1). Furthermore, the MSCs assembled by mPPy-nbs deliver impressive volumetric capacitance of 90 F cm^(−3. and energy density of 2.0 mWh cm^(−3., superior to the most reported polymers-based MSCs. Also, the fabricated MSCs present excellent flexibility with almost no capacitance decay under varying bending states, and robust serial/parallel self-integration for boosting voltage and capacitance output. Therefore, this work will inspire the new design of mesoporous conducting polymer materials toward high-performance microscale supercapacitive devices.

关键词： Interface co-assembly Dual-colloids Mesopore Hollow nano-bowl Micro-supercapacitors

Furostanol Saponins from Asparagus cochinchinensis and Their Cytotoxicity

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Natural Products and Bioprospecting 2021年第6期11卷 651-658页

作者： Ruo-Song Zhang Yang-Yang Liu Pei-Feng Zhu qiong Jin Zhi Dai Xiao-Dong luo state key laboratory of Phytochemistry and Plant Resources in West{3. and Yunnan key laboratory of Natural Medicinal Chemistry Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China University of Chinese Academy of sciences Beijing 100049China key laboratory of Medicinal Chemistry for Natural Resource Ministry of EducationYunnan Provincial Center for Research&Development of Natural ProductsSchool of Chemical Science and TechnologyYunnan UniversityKunmingChina

Phytochemical investigation on the roots of Asparagus cochinchinensis led to the isolation of one new furostanol saponin,named 26-O-β-d-glucopyranosyl-22α-hydroxyl-(25R)-Δ5(6)-furost-3.,26-diol-3.O-α-l-rhamnopyranosyl-(1→2)-[β-d-glucopyranosyl-(1→4)-α-l-rhamnopyranosyl-(1→4)]-β-d-glucopyranoside(1),along with three known congeners(2‒4).The structure of new saponin was elucidated via comprehensive inspection of its HRMS and NMR spectral data as well as chemical technology,whereas those of known ones were identified by comparison of their NMR and MS spectral data with those reported in *** isolated saponins were evaluated for their cytotoxic effects on two human liver(MHCC97H)and lung adenocarcinoma(H1299)cancer cells in *** them,both 1 and 2 showed significant cytotoxicity against above mentioned cell *** studies revealed that these two saponins could significantly inhibit their proliferation of MHCC97H and H1299 cells.

关键词： Steroid saponins Asparagus cochinchinensis Cytotoxicity Structural elucidation

Study on relative collection efficiency of PMTs with spotlight

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Radiation Detection technology and Methods 2019年第3期3卷 30-36页

作者： Hai‑qiong Zhang Zhi‑min Wang Feng‑jiao luo An‑bo Yang Zhong‑Hua Qin Chang‑gen Yang Yue‑kun Heng University of Chinese Academy of science Beijing 100049China institute of High Energy Physics Beijing 100049China state key laboratory of Particle Detection and Electronics Beijing 100049China key laboratory of Particle Astrophysics Beijing 100049China

nd Photon detection efficiency is a key parameter of PMTs in high-precision neutrino and dark matter experiments,while normally the quantum efficiency is used with a normalization factor and angular response as the detection efficiency,where it is always coupled with detector response from the calibration ***,the absolute photon detection efficiency of 20′′PMTs in photon-counting level is further considered rather than the combination of quantum efficiency and normalization *** and method In order to have a good understanding of photon detection efficiency of the large-area PMT,we conduct a detailed comparison of relative collection efficiencies of a series of PMTs with *** study is based on the tests of relative quantum efficiency and relative detection efficiency,checked with several light *** All the results are consistent in relative QE and DE measurement with different light intensities,and the error of each parameter is coupled in our *** on the measurements,Hamamatsu R12860 shows the maximum collection efficiency with spotlight at PMT center,and Hamamatsu R12199,R13.5 and HZC XP72B22 have the same level of CE within the *** Following the configuration on incident light and DE definition,we can further define the DE of a large-area PMT with similar algorithms,which will also be used for detector simulation in JUNO.

关键词： PMT QE Relative DE Relative CE

Physics-data-driven intelligent optimization for large-aperture metalenses

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Opto-Electronic Advances 2023年第11期6卷 5-15页

作者： Yingli Ha Yu luo Mingbo Pu Fei Zhang qiong He Jinjin Jin Mingfeng Xu Yinghui Guo Xiaogang Li Xiong Li Xiaoliang Ma Xiangang luo National key laboratory of Optical Field Manipulation science and {3. Chinese Academy of SciencesChengdu 610209China state key laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China Research Center on Vector Optical Fields Institute of Optics and ElectronicsChinese Academy of SciencesChengdu 610209China School of Optoelectronics University of Chinese Academy of SciencesBeijing 100049China Tianfu Xinglong Lake laboratory Chengdu 610299China

Metalenses have gained significant attention and have been widely utilized in optical systems for focusing and imaging,owing to their lightweight,high-integration,and exceptional-flexibility *** design methods neglect the coupling effect between adjacent meta-atoms,thus harming the practical performance of *** existing physical/data-driven optimization algorithms can solve the above problems,but bring significant time costs or require a large number of ***,we propose a physics-data-driven method employing an“intelligent optimizer”that enables us to adaptively modify the sizes of the meta-atom according to the sizes of its surrounding *** implementation of such a scheme effectively mitigates the undesired impact of local lattice coupling,and the proposed network model works well on thousands of data-sets with a validation loss of 3.10^(−3..Based on the“intelligent optimizer”,a 1-cm-diameter metalens is designed within 3.hours,and the experimental results show that the 1-mm-diameter metalens has a relative focusing efficiency of 93.4%(compared to the ideal focusing efficiency)and a Strehl ratio of *** to previous inverse design method,our method significantly boosts designing efficiency with five orders of magnitude reduction in *** generally,it may set a new paradigm for devising large-aperture meta-devices.

关键词： intelligence method physics-data-driven method inverse design large-aperture metalenses