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Theoretical Study of Electronic Structures and Charge Transport Properties of 9,10-Bis（（E）-2-（pyrid-n-yl） vinyl）（n=2, 3, 4） Anthracene

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Chinese Journal of Chemistry 2015年第8期33卷 974-980页

作者： Qing Guo Lijuan Wang yuanfei jiang Jing Guo Bin Xu Wenjing Tian State Key Laboratory of Supramolecular Structure and Materials Jilin University Changchun Jilin 130012 China School of Materials Science and Engineering Harbin Institute of Technology at Weihai Weihai Shandong 264209 China Institution of Atomic and Molecular Physics Jilin University Changchun Jilin 130012 China

Charge carrier mobility is one of the most significant properties for organic semiconductors. In this work, the electronic structures and charge transport properties of 9,10-bis（（E）-2-（pyrid-n-yl）vinyl）（n=2, 3, 4） anthracene （BP2VA, BP3VA and BP4VA） were investigated via the analysis of the molecular geometry, the reorganization en- ergy, the frontier orbital and density of state, as well as the electronic coupling and the charge mobility. The results indicated that the linkage between 9,10-divinyl anthracene unit and pyridine （ortho-, meta- and para-） influenced not only the intra-molecular conformation （i.e., the reorganization energies）, but also the intermolecular interaction （i.e., transfer integrals）, and finally the charge mobility of the molecules. It is also found that：（1） The calculated charge mobilties of holes are dozens of times higher than those of electrons for the three molecules. （2） The charge mobilities of hole and electron of the three molecules display the trend： μBP4VA〉μBPZVA〉μBP3VA, and the hole mobility of BP4VA is as high as as-cm^2/（V·s）.

关键词： charge mobility reorganization energy electronic structure

Effect of lens focusing distance on laser-induced silicon plasmas at different sample temperatures

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Plasma Science and Technology 2019年第3期21卷 69-76页

作者： Dan ZHANG Anmin CHEN Qiuyun WANG Ying WANG Suyu LI yuanfei jiang Mingxing JIN Institute of Atomic and Molecular Physics Jilin University Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy (Jilin University)

We investigated the dependence of laser-induced breakdown spectral intensity on the focusing position of a lens at different sample temperatures(room temperature to 300 ℃) in atmosphere.A Q-switched Nd:YAG nanosecond pulsed laser with 1064 nm wavelength and 10 ns pulse width was used to ablate silicon to produce plasma. It was confirmed that the increase in the sample's initial temperature could improve spectral line intensity. In addition, when the distance from the target surface to the focal point increased, the intensity firstly rose, and then *** trend of change with distance was more obvious at higher sample temperatures. By observing the distribution of the normalized ratio of Si atomic spectral line intensity and Si ionic spectral line intensity as functions of distance and temperature, the maximum value of normalized ratio appeared at the longer distance as the initial temperature was higher, while the maximum ratio appeared at the shorter distance as the sample temperature was lower.

关键词： laser-induced breakdown spectroscopy initial sample temperature distance between focal point and target surface

Enhancement of optical emission generated from femtosecond double-pulse laser-induced glass plasma at different sample temperatures in air

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Plasma Science and Technology 2019年第3期21卷 98-107页

作者： Ying WANG Anmin CHEN Qiuyun WANG Dan ZHANG Laizhi SUI Suyu LI yuanfei jiang Mingxing JIN Institute of Atomic and Molecular Physics Jilin University Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy (Jilin University)

In double-pulse laser-induced breakdown spectroscopy(DP-LIBS), the collinear femtosecond double-pulse laser configuration is experimentally investigated with different initial sample temperatures using a Ti:sapphire laser. The glass sample is ablated to produce the plasma spectroscopy. During the experiment, the detected spectral lines include two Na(I) lines(589.0 nm and 589.6 nm) and one Ca(I) line at the wavelength of 585.7 nm. The emission lines are measured at room temperature(22 ℃) and three higher initial sample temperatures(T_s?=?100 ℃, 200 ℃, and 250 ℃). The inter-pulse delay time ranges from-250 ps to 250 *** inter-pulse delay time and the sample temperature strongly influence the spectral intensity,and the spectral intensity can be significantly enhanced by increasing the sample temperature and selecting the optimized inter-pulse time. For the same inter-pulse time of 0 ps(single-pulse LIBS), the enhancement ratio is approximately 2.5 at T_s?=?200 ℃ compared with that obtained at T_s?=?22 ℃. For the same inter-pulse time of 150 ps, the enhancement ratio can be up to 4 at T_s?=?200 ℃ compared with that obtained at T_s?=?22 ℃. The combined enhancement effects of the different initial sample temperatures and the double-pulse configuration in femtosecond LIBS are much stronger than that of the different initial sample temperatures or the double-pulse configuration only.

关键词： laser-induced breakdown spectroscopy femtosecond laser double pulse emission enhancement glass

Time-resolved spectroscopy of femtosecond laser-induced Cu plasma with spark discharge

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Plasma Science and Technology 2019年第6期21卷 140-146页

作者： Qiuyun WANG Anmin CHEN Wanpeng XU Dan ZHANG Ying WANG Suyu LI yuanfei jiang Mingxing JIN Institute of Atomic and Molecular Physics Jilin University Changchun 130012 People's Republic of China Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy(Jilin University) Changchun 130012 People's Republic of China

The combination of spark discharge and laser-induced breakdown spectroscopy (LIBS) is called spark discharge assisted *** works under laser-plasma triggered spark discharge mode,and shows its ability to enhance spectral emission *** work uses a femtosecond laser as the light souuce,since femtosecond laser has many advantages in laser-induced plasma compared with nanosecond laser,meanwhile,the study on femtosecond LIBS with spark discharge is ***-resolved spectroscopy of spark discharge assisted femtosecond LIBS was investigated under different discharge voltages and laser *** results showed that the spectral intensity was significantly enhanced by using spark discharge compared with LIBS ***,the spectral emission intensity using spark discharge assisted LIBS increased with the increase in the laser *** addition,at low laser energy,there was an obvious delay on the discharge time compared with high laser energy,and the discharge time with positive voltage was different from that with negative voltage.

关键词： laser-induced breakdown spectroscopy femtosecond laser spark discharge emission enhancement

Comparison of emission signals for different polarizations in femtosecond laser-induced breakdown spectroscopy

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Plasma Science and Technology 2021年第4期23卷 76-82页

作者： Qiuyun WANG Anmin CHEN Miao LIU Yitong LIU Qingxue LI Suyu LI yuanfei jiang Xun GAO Mingxing JIN Institute of Atomic and Molecular Physics Jilin UniversityChangchun 130012People’s Republic of China School of Science Changchun University of Science and TechnologyChangchun 130022People’s Republic of China

In this study, a femtosecond laser was focused to ablate brass target and generate plasma emission in air. The influence of lens to sample distance(LTSD) on spectral emission of brass plasma under linearly and circularly polarized pulses with different pulse energies was investigated. The results indicated that the position with the strongest spectral emission moved toward focusing lens with increasing the energy. At the same laser energy, the line emission under circularly polarized pulse was stronger compared with linearly polarized pulse for different LTSDs. Next, electron temperature and density of the plasma were obtained with Cu(Ⅰ) lines,indicating that the electron temperature and density under circularly polarized pulse were higher compared to that under linearly polarized pulse. Therefore, changing the laser polarization is a simple and effective way to improve the spectral emission intensity of femtosecond laserinduced plasma.

关键词： laser-induced breakdown spectroscopy femtosecond pulse polarization lens to sample distance emission enhancement

Ti6Al4V合金微弧氧化对Ni-P-ZrO_2化学复合镀层结合性能和耐磨性能的影响(英文)

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稀有金属材料与工程 2013年第12期42卷 2427-2432页

作者：冯长杰胡水莲江鸢飞周雅南昌航空大学江西南昌330063

在Ti6Al4V合金微弧氧化膜表面制备Ni-P-ZrO2化学复合镀层,微弧氧化处理时间分别为15、30、60、90 min。采用扫描电镜/能谱仪、划痕试验、热震试验、显微硬度计和球盘式摩擦磨损试验机研究了微弧氧化膜结构对Ni-P-ZrO2化学复合镀层的结... 详细信息

在Ti6Al4V合金微弧氧化膜表面制备Ni-P-ZrO2化学复合镀层,微弧氧化处理时间分别为15、30、60、90 min。采用扫描电镜/能谱仪、划痕试验、热震试验、显微硬度计和球盘式摩擦磨损试验机研究了微弧氧化膜结构对Ni-P-ZrO2化学复合镀层的结合性能与摩擦性能的影响。结果表明:随着微弧氧化时间的增加,复合镀层的结合性能显著提高,原因是微弧氧化膜的多孔性结构及其机械锁合效应。与Ti6Al4V合金相比,微弧氧化+化学复合镀处理后的试样硬度和耐磨性显著提高,Ti6Al4V合金表现为是严重的黏着磨损,而Ni-P-ZrO2复合镀层以磨砺磨损为主。

关键词：微弧氧化 Ni-P-ZrO2化学复合镀层结合性能耐磨性能

Ni-P-ZrO_2化学复合镀层对TC4钛合金抗氧化性能和阻燃性能的影响

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稀有金属材料与工程 2014年第9期43卷 2152-2156页

作者：冯长杰胡水莲江鸢飞杜楠南昌航空大学江西南昌330063

在TC4钛合金微弧氧化膜表面制备Ni-P-ZrO2化学复合镀层,研究其在600和700℃空气中的抗高温氧化性能,利用脉冲激光烧蚀处理研究其阻燃性能。结果表明,Ni-P-ZrO2化学复合镀层在600和700℃空气中的氧化动力学曲线呈抛物线形状,氧化膜薄且致... 详细信息

在TC4钛合金微弧氧化膜表面制备Ni-P-ZrO2化学复合镀层,研究其在600和700℃空气中的抗高温氧化性能,利用脉冲激光烧蚀处理研究其阻燃性能。结果表明,Ni-P-ZrO2化学复合镀层在600和700℃空气中的氧化动力学曲线呈抛物线形状,氧化膜薄且致密,主要以NiO为主,镀层中非晶的NiP相转变成晶态的Ni2P相,具有良好的抗氧化性能。激光烧蚀处理时,Ni-P-ZrO2镀层烧蚀体积、面积分别是TC4烧蚀的1/3和1/2。镀层激光烧蚀处理后,在烧蚀孔洞内部出现柱状晶粒,ZrO2粒子在镀层表面发生团聚,Ni-P-ZrO2化学复合镀层能有效地提高钛合金的阻燃性能。

关键词： TC4钛合金 Ni-P-ZrO2化学复合镀层抗氧化性能阻燃性能

黄连温胆汤合星蒌承气汤联合神经介入取栓术治疗急性脑梗死临床观察

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光明中医 2023年第18期38卷 3579-3581页

作者：姜远飞泰安市中医医院脑病科山东泰安271000

目的观察黄连温胆汤合星蒌承气汤联合神经介入取栓术治疗急性脑梗死的临床疗效。方法将82例急性脑梗死患者随机分为2组,各41例,2组均采用神经介入取栓术治疗,对照组在术后采用抗凝等内科常规治疗,治疗组在对照组的基础上采用黄连温胆汤... 详细信息

目的观察黄连温胆汤合星蒌承气汤联合神经介入取栓术治疗急性脑梗死的临床疗效。方法将82例急性脑梗死患者随机分为2组,各41例,2组均采用神经介入取栓术治疗,对照组在术后采用抗凝等内科常规治疗,治疗组在对照组的基础上采用黄连温胆汤合星蒌承气汤治疗。结果2组治疗后症状评分、NIHSS评分、血液黏稠度均低于治疗前(P<0.05),且治疗组低于对照组(P<0.05)。2组治疗后Balthel指数高于治疗前(P<0.05),且治疗组高于对照组(P<0.05)。治疗组总有效率高于对照组(P<0.05)。结论黄连温胆汤合星蒌承气汤联合神经介入取栓术治疗急性脑梗死,能够改善神昏、偏瘫、失语程度及血液黏稠度,减轻神经功能缺损,临床疗效及提高生活质量。

关键词：中风急性脑梗死黄连温胆汤星蒌承气汤中医药疗法

平行板约束对激光诱导PMMA等离子体中CN分子光谱的影响

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中国激光 2020年第8期47卷 263-269页

作者：杨雪陈安民李苏宇姜远飞金明星吉林化工学院理学院吉林吉林132022 吉林大学原子与分子物理研究所吉林长春130012 吉林大学吉林省应用原子分子光谱重点实验室吉林长春130012

在大气环境中,研究平行板约束对激光诱导PMMA等离子体中CN分子光谱的影响,测量得到的5条光谱峰所处波长分别为388.29nm(0-0)、387.0nm(1-1)、386.14nm(2-2)、385.44nm(3-3)及385.03nm(4-4)。实验结果表明,空间约束下的CN分子光谱峰强度... 详细信息

在大气环境中,研究平行板约束对激光诱导PMMA等离子体中CN分子光谱的影响,测量得到的5条光谱峰所处波长分别为388.29nm(0-0)、387.0nm(1-1)、386.14nm(2-2)、385.44nm(3-3)及385.03nm(4-4)。实验结果表明,空间约束下的CN分子光谱峰强度明显高于无空间约束下的。另外,通过拟合CN光谱获得了CN分子的振动温度,结果显示,空间约束下的CN分子的振动温度明显高于无空间约束下的振动温度,且高激光能量下的CN分子振动温度高于低激光能量下的振动温度。平行板反射冲击波压缩等离子体羽,使得其温度和数密度增加,增强了激光诱导PMMA等离子体中CN分子的光谱强度。

关键词：光谱学激光诱导击穿光谱空间约束光谱增强振动温度