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Measurement and analysis of K-shell lines of silicon ions in laser plasmas

High Power laser science and Engineering 2018年第2期6卷 133-140页

作者： Bo Han Feilu Wang Jiayong Zhong Guiyun Liang Huigang Wei Dawei Yuan Baojun Zhu Fang Li Chang Liu Yanfei Li Jiarui Zhao Zhe Zhang Chen Wang Jun Xiong Guo Jia Neng Hua Jianqiang Zhu Yutong Li Gang Zhao Jie Zhang Department of Astronomy Beijing Normal University key laboratory of Optical Astronomy National Astronomical Observatories Chinese Academy of Sciences IFSA Collaborative Innovation Center Shanghai Jiao Tong University National laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Research Center for laser Fusion China Academy of Engineering Physics National laboratory on High Power laser and Physics Chinese Academy of Sciences key laboratory for laser Plasmas (moe) and Department of Physics and Astronomy Shanghai Jiao Tong University

We present laboratory measurement and theoretical analysis of silicon K-shell lines in plasmas produced by Shenguang II laser facility, and discuss the application of line ratios to diagnose the electron density and temperature of laser *** types of shots were carried out to interpret silicon plasma spectra under two conditions, and the spectra from 6.6 ?A to6.85 ?A were measured. The radiative-collisional code based on the flexible atomic code(RCF) is used to identify the lines, and it also well simulates the experimental spectra. Satellite lines, which are populated by dielectron capture and large radiative decay rate, influence the spectrum profile significantly. Because of the blending of lines, the traditional G value and R value are not applicable in diagnosing electron temperature and density of plasma. We take the contribution of satellite lines into the calculation of line ratios of He-α lines, and discuss their relations with the electron temperature and density.

关键词： high energy density physics laser plasmas interaction plasmas astrophysics

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Linewidth of electromagnetically induced transparency under motional averaging in a coated vapor cell

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chinese Physics B 2013年第3期22卷 289-296页

作者：徐智翔曲伟智高然胡新华肖艳红 Department of Physics State Key Laboratory of Surface PhysicsLaboratory of Advanced Materialsand Key Laboratory of Micro and Nano Photonic Structures of Ministry of EducationFudan University Department of Material science Fudan University

The linewidth of electromagnetically induced transparency（EIT） in a coated Rb vapor cell was studied under a magnetic field *** nonlinear broadening of the EIT linewidth with the magnetic field gradient was *** was found that the motional averaging of the field gradient was more pronounced at higher laser intensities and larger beam *** the same regime,there was a small linewidth decrease with the increasing magnetic field *** have established a Monte-Carlo model,which gave results in good qualitative agreement with our *** pictures for the above phenomena were also *** results provide an understanding of the EIT linewidth behavior under motional averaging,and should be useful for applications in quantum optics and metrology based on coated vapor cells.

关键词： electromagnetically induced transparency coated cell linewidth motional averaging

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Supramolecular confinement effect enabling light-harvesting system for photocatalytic α-oxyamination reaction

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chinese Chemical Letters 2024年第11期35卷 309-313页

作者： Xuanyu Wang Zhao Gao Wei Tian Shaanxi key laboratory of Macromolecular science and Technology Xi'an Key Laboratory of Hybrid Luminescent Materials and Photonic DeviceMOE Key Laboratory of Material Physics and Chemistry under Extraordinary ConditionsSchool of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi'an 710072China

The supramolecular F?rster resonance energy transfer(FRET)is seen as a promising approach for organic photocatalysis using dyes as catalysts,because it combines the high efficiency of energy transfer with the dynamic responsiveness based on non-covalent *** we propose a supramolecular FRET photocatalysis strategy forα-oxyamination reaction based on supramolecular confinement *** well-designed benzothiadiazole-based cationic monomer as energy donor and the dyes of Nile Red as acceptor are doped into the amphiphilic surfactants of sodium dodecyl sulfate(SDS).Benefitting from the supramolecular confinement space provided by SDS in aqueous environment,the FRET process between the monomer and Nile Red is effectively achieved(exciton migration rate:3.99×10^(14)L mol^(-1)s^(-1)).On this basis,the supramolecular FRET system is used as an efficient energy source to catalyzeα-oxyamination reactions between a series of 1,3-dicarbonyl compounds and 2,2,6,6-tetramethylpiperidine-1-oxyl under white LED light,showing a yield as high as 94%and a turnover frequency value of 3.92 h^(-1).This photocatalytic result shows a great enhancement compared to that of Nile Red alone.

关键词： Self-assembly Supramolecular chemistry Light harvesting Energy transfer Confinement effect

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Electrochemical corrosion behavior of 2A02 Al alloy under an accelerated simulation marine atmospheric environment

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Journal of Materials science & Technology 2019年第4期35卷 651-659页

作者： Min Cao Li Liu Zhongfen Yu Lei Fan Ying Li Fuhui Wang Institute of Metal Research Chinese Academy of Sciences University of chinese Academy of sciences key laboratory for Anisotropy and Texture of Materials (moe) School of Materials Science and EngineeringNortheastern University

The corrosion behavior of 2 A02 Al alloy under simulated marine atmospheric environment has been studied using mass-gain, scanning electron microscope/energy dispersive spectroscopy(SEM/EDS), laser scanning confocal microscopy, X-ray diffraction spectroscopy and localized electrochemical methods. The results demonstrate that the relationship between the corrosion induced mass-gain and the corrosion time is in accordance with the power rule. The mass-gain increases gradually during the corrosion time,while the corrosion rate decreases. With ongoing of the corrosion, corrosion products film changed from a porous to a compact structure. The various spectroscopic data show that the corrosion products films composed mainly of Al(OH)_3, Al_2O_3 and AlCl_3. The electrochemical corrosion behavior of the 2 A02 Al alloy was studied by electrochemical impedance spectroscopy(EIS).

关键词： Thin electrolyte layers Atmospheric corrosion 2A02 Al alloy EIS

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Infrared Spectroscopy of Neutral and Cationic Pyrrolidine Monomer in Supersonic Jet

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chinese Journal of Chemical Physics 2020年第1期33卷 43-47,I0005,I0006页

作者： Min Xie Zhao-li Zhang Yu Zhang Xiao-nan Sun Fu-fei Sun Yong-jun Hu moe key laboratory of laser life science&Guangdong Provincial key laboratory of laser life science Guangzhou Key Laboratory of Spectral Analysis and Functional ProbesCollege of BiophotonicsSouth China Normal UniversityGuangzhou 510631China

Pyrrolidine,a five membered heterocyclic molecule,is widely existing in ***,infrared spectra of pyrrolidine monomer in neutral and cationic states were obtained by vacuum ultraviolet ionization,infrared photodissociation and time of flight mass *** in neutral and cationic states,it is found that their CH stretching vibration bands are red *** the IR spectrum of neutral pyrrolidine,because the electric dipole moment of NH is small,we have not observed the NH stretching vibration ***,the NH stretching vibration band of pyrrolidine is greatly enhanced after ionization,and this band red-shifts compared with the previous *** red shifts of CH stretching vibrations in neutral and cationic states are caused by the negative and positive hyperconjugation,*** enhancement and red shift of the NH stretching band are owing to the ejection of the electrons on the N atom after *** the calculations,it is found that the acidity of the CH bond is a little stronger than that of NH *** kinds of studies would be helpful to understand the intrinsic properties of biomolecules in neutral and cationic states,and to provide reference for the further study of living organic macromolecules.

关键词： IR spectroscopy Hyperconjugation Cationic state CH bond acidity Gas phase

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Photosensitizer conjugate-functionalized poly(hexamethylene guanidine) for potentiated broad-spectrum bacterial inhibition and enhanced biocompatibility

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chinese Chemical Letters 2020年第9期31卷 2516-2519页

作者： Fengfeng Xiao Bing Cao Liewei Wen Yanhong Su Meixiao Zhan Ligong Lu Xianglong Hu moe key laboratory of laser life science&Institute of laser life science College of BiophotonicsSouth China Normal UniversityGuangzhou 510631China Guangdong Provincial key laboratory of laser life science College of BiophotonicsSouth China Normal UniversityGuangzhou 510631China Zhuhai Interventional Medical Center Zhuhai Precision Medical CenterZhuhai People's HospitalZhuhai Hospital Affiliated with Jinan UniversityJinanUniversityZhuhai 519000China

Pathogen infection is the main cause of human morbidity and *** antibiotics usually sterilize bacteria in chemical ways,which tends to develop serious antibiotic *** polymers exhibit good bacterial inhibition with less resistance,but often face severe cytotoxicity toward normal *** optimization of polymeric antimicrobials for enhanced bactericidal capacity and improved biocompatibility is quite *** addition,photodynamic therapy(PDT) is a therapeutic modality with less susceptibility to develop ***,a typical commercial polymeric antimicrobial,polyhexamethylene guanidine(PHMG) was selected for current proof-of-concept optimization due to its excellent bactericidal capacity but moderate ***-Y(EoS)was copolymerized to afford EoS-labeled polymer conjugates,poly(2-(dimethylamino) ethyl methacrylate-co-eosin),P(DMAEMA-co-EoS),which was conjugated with PHMG to afford a novel polymeric antimicrobial,P(DMAEMA-co-EoS)-b-PHMG-b-P(DMAEMA-co-EoS),noted as *** could efficiently kill broad-spectrum bacteria by physical damage and photodynamic *** with PHMG,the bacterial inhibition of PEoS-PHMG was potentiated after the ***,PEoS-PHMG exhibited low cytotoxicity and minimal hemolysis,which was demonstrated by cell viability assays toward LO2 cells and RAW 264.7 cells as well as hemolytic assays against red blood *** results confirmed that the resultant PEoS-PHMG could act as promising alternative antibacterial materials with excellent broad-spectrum bacterial inhibition and favorable biocompatibility.

关键词： Poly(hexamethylene guanidine) Photodynamic therapy Eosin-Y Broad-spectrum bacterial Inhibition Biocompatibility

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Magnetic anisotropy manipulation and interfacial coupling in Sm_(3)Fe_(5)O_(12)films and CoFe/Sm_(3)Fe_(5)O_(12)heterostructures

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chinese Physics B 2021年第12期30卷 583-590页

作者： Lei Shen Guanjie Wu Tao Sun Zhi Meng Chun Zhou Wenyi Liu Kang Qiu Zongwei Ma Haoliang Huang Yalin Lu Zongzhi Zhang Zhigao Sheng Anhui key laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field LaboratoryHFIPSChinese Academy of Sciences(CAS)Hefei 230031China University of science and Technology of China Hefei 230026China Shanghai Ultra-Precision Optical Manufacturing Engineering Research Center and key laboratory of Micro and Nano photonic Structures(moe) Department of Optical Science and EngineeringFudan UniversityShanghai 200433China Anhui laboratory of Advanced Photon science and Technology Hefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China key laboratory of Photovoltaic and Energy Conservation Materials Chinese Academy of SciencesHefei 230031China

The magnetic anisotropy manipulation in the Sm_(3)Fe_(5)O_(12)(SmIG)films and its effect on the interfacial spin coupling in the CoFe/SmIG heterostructures were studied *** switching the orientation of the Gd_(3)Ga_(5)O_(12)substrates from(111)to(001),the magnetic anisotropy of obtained SmIG films shifts from in-plane to *** results can also be obtained in the films on Gd_(3)Ga_(5)O_(12)substrates,which identifies the universality of such orientation-induced magnetic anisotropy ***,the interfacial spin coupling and magnetic anisotropy switching effect on the spin wave in CoFe/SmIG magnetic heterojunctions have also been explored by utilizing the time-resolved magneto-optical Kerr effect *** is intriguing to find that both the frequency and effective damping factor of spin precession in CoFe/SmIG heterojunctions can be manipulated by the magnetic anisotropy switching of SmIG *** findings not only provide a route for the perpendicular magnetic anisotropy acquisition but also give a further path for spin manipulation in magnetic films and heterojunctions.

关键词： perpendicular magnetic anisotropy Sm_(3)Fe_5O_(12)films interfacial spin coupling CoFe/Sm_(3)Fe_5O_(12)heterojunction

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Micro-Gal level gravity measurements with cold atom interferometry

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chinese Physics B 2015年第5期24卷 32-43页

作者：周敏康段小春陈乐乐罗覃徐耀耀胡忠坤 moe key laboratory of Fundamental Physical Quantities Measurements School of PhysicsHuazhong University of Science and Technology

Developments of the micro-Gal level gravimeter based on atom interferometry are reviewed, and the recent progress and results of our group are also presented. Atom interferometric gravimeters have shown high resolution and accuracy for gravity measurements. This kind of quantum sensor has excited world-wide interest for both practical applications and fundamental research.

关键词： gravity measurements atom interferometer laser cooling and trapping precision measurements

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Dissociative Photoionization of Heterocyclic Molecule-Morpholine under VUV Synchrotron Radiation

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chinese Journal of Chemical Physics 2019年第2期32卷 259-266,I0003,I0004-I0005页

作者： Wen-tao Song Yong-jun Hu Shan Jin Yu-jian Li moe key laboratory of laser life science & Institute of laser life science and Guangzhou Key Laboratory of spectral analysis and functional probes College of Biophotonics South China Normal University Guangzhou 510631 China

The radiation damage of biomolecules, in particular with aliphatic compound, has been extensively studied. Morpholine is a typical six-membered aliphatic heterocyclic compound. In the present work, photoionization and dissociation of the morpholine monomer and subsequent fragmentations have been investigated by synchrotron vacuum ultraviolet photoionization mass spectrometry and theoretical calculations. The vertical ionization energy of morpholine monomer is 8.37±0.05 eV, which agrees reasonably well with a theoretical value 8.41 eV of morpholine. Experimentally observed fragmentation of morpholine (m/z=87 amu) gives rise to m/z=86 amu, m/z=57 amu, and m/z=29 amu. Based on experimental and theoretical results, it is found that the m/z=86 amu is produced by losing H atom, the m/z=57 amu is formed by the elimination of CH2O with a ring-opening process, the m/z=29 amu is generated by further dissociation of the fragment m/z=57 amu (C3H7N)+ by the elimination of C2H4. This finding would provide valuable insight into the photo-damage of aliphatic compounds, which may be related to living cells and other biological system.

关键词： Photoionization Dissociation Morpholine Gas phase

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Strontium-substituted sub-micron bioactive glasses inhibit ostoclastogenesis through suppression of RANKL-induced signaling pathway

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Regenerative Biomaterials 2020年第3期7卷 303-311页

作者： Deqiu Huang Fujian Zhao Wendong Gao Xiaofeng Chen Zhouyi Guo Wen Zhang moe key laboratory of laser life science&SATCM Third Grade laboratory of chinese medicine and photonics Technology College of BiophotonicsSouth China Normal UniversityGuangzhou 510631GuangdongChina Department of Biomedical Engineering School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510641GuangdongChina Department of Medical Biotechnology School of Basic Medical SciencesGuangzhou University of Chinese MedicineGuangzhouGuangdongChina

Strontium-substituted bioactive glass(Sr-BG)has shown superior performance in bone ***-BG-induced osteogenesis has been extensively studied;however,Sr-BG-mediated osteoclastogenesis and the underlying molecular mechanism remain *** is recognized that the balance of osteogenesis and osteoclastogenesis is closely related to bone repair,and the receptor activators of nuclear factor kappaB ligand(RANKL)signaling pathway plays a key role of in the regulation of ***,we studied the potential impact and underling mechanism of strontium-substituted sub-micron bioactive glass(Sr-SBG)on RANKL-induced osteoclast activation and differentiation in *** expected,Sr-SBG inhibited RANKL-mediated osteoclastogenesis significantly with the experimental performance of decreased mature osteoclasts formation and downregulation of osteoclastogenesis-related gene ***,it was found that Sr-SBG might suppress osteoclastogenesis by the combined effect of strontium and silicon released through inhibition of RANKL-induced activation of p38 and NF-κB *** results elaborated the effect of Sr-SBG-based materials on osteoclastogenesis through RANKLinduced downstream pathway and might represent a significant guidance for designing better bone repair materials.

关键词： strontium-substituted sub-micron bioactive glass osteoclastogenesis RANKL signaling pathway RAW264.7

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