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High-energy,hundred-picosecond pulsed 266 nm mid-ultraviolet generation by a barium borate crystal

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High Power Laser Science and Engineering 2023年第2期11卷 127-131页

作者： Ning Wen Nan Wang Nan Zong xue-Chun lin Hong-Wei Gao Yong Bo Qin-Jun Peng Da-fu Cui Zu-yan xu Key Laboratory of functional Crystal and Laser Technology Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijingChina Laboratory of All-Solid-State light Source Institute of SemiconductorsChinese Academy of SciencesBeijingChina Key Laboratory of Solid-State Laser Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijingChina institute of Optical physics and Engineering Technology Qilu ZhongkeJinanChina University of chinese academy of sciences BeijingChina

We present a high-energy,hundred-picosecond(ps)pulsed mid-ultraviolet solid-state laser at 266 nm by a direct second harmonic generation(SHG)in a barium borate(BaB_(2)O_(4),BBO)nonlinear *** green pump source is a 710 mJ,330 ps pulsed laser at a wavelength of 532 nm with a repetition rate of 1 *** a green pump energy of 710 mJ,a maximum output energy of 253.3 mJ at 266 nm is achieved with 250 ps pulse duration resulting in a peak power of more than 1 GW,corresponding to an SHG conversion efficiency of 35.7%from 532 to 266 *** experimental data were well consistent with the theoretical *** the best of our knowledge,this laser exhibits both the highest output energy and highest peak power ever achieved in a hundred-ps/ps regime at 266 nm for BBO-SHG.

关键词： all-solid-state laser hundred-picosecond pulse mid-ultraviolet high-energy laser

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纳米酶在生物检测和癌症治疗中的应用

西南大学学报（自然科学版） 2024年第6期46卷 17-28页

作者：谭龙飞傅仕艳梅林刘映岐中国科学院理化技术研究所北京100190 陆军军医大学军事预防医学系重庆400038 陆军军医大学边防卫勤训练大队新疆昌吉831200 西南大学医院重庆400715

纳米酶是2022年度化学领域十大新兴技术之一.它如同天然酶一样,能够在温和条件下催化酶底物,呈现出与天然酶类似的酶促反应动力学和反应机制,并且可以作为天然酶的替代物应用于疾病的检测及治疗.在免疫检测方面,纳米酶可以作为信号放大... 详细信息

纳米酶是2022年度化学领域十大新兴技术之一.它如同天然酶一样,能够在温和条件下催化酶底物,呈现出与天然酶类似的酶促反应动力学和反应机制,并且可以作为天然酶的替代物应用于疾病的检测及治疗.在免疫检测方面,纳米酶可以作为信号放大器或传统酶的替代品,提高检测的灵敏度和特异性.而在肿瘤微环境治疗中,通过特异性响应肿瘤微环境中弱酸性、缺氧和过表达过氧化氢及谷胱甘肽等条件来辅助癌症治疗.此外,纳米酶还可与多种外部刺激包括磁场、辐射、光、超声和微波等结合,实现多种方式协同检测治疗.该研究总结了纳米酶的合成方法、分类及催化原理以及纳米酶的生物医学应用,展望了其应用前景.

关键词：纳米酶催化原理生物医学应用

Olivine-norite rock detected by the lunar rover Yutu-2 likely crystallized from the SPA-impact melt pool

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National Science Review 2020年第5期7卷 913-920页

作者： Honglei lin Zhiping He Wei yang yangting lin Rui xu Chi Zhang Meng-Hua Zhu Rui Chang Jinhai Zhang Chunlai li Hongyu lin yang liu Sheng Gou Yong Wei Sen Hu Changbin xue Jianfeng yang Jie Zhong Xiaohui fu Weixing Wan Yongliao Zou Key Laboratory of Earth and Planetary physics Institute of Geology and Geophysics Chinese Academy of Sciences Key Laboratory of Space Active Opto-Electronics Technology Shanghai Institute of Technical Physics Chinese Academy of Sciences State Key Laboratory of Lunar and Planetary sciences Macau University of Science and Technology beijing institute of Space Mechanics and Electricity State Key Laboratory of Space Weather National Space Science CenterChinese Academy of Sciences State Key Laboratory of Remote Sensing Science Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences Key Laboratory of Electronics and Information Technology for Space System National Space Science Center Chinese Academy of Sciences Xi'an institute of Optics and Precision Mechanics Chinese Academy of Sciences institute of Optics and Electronics Chinese Academy of Sciences Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment Institute of Space SciencesShandong University

Chang’E-4 landed in the South Pole-Aitken (SPA) basin,providing a unique chance to probe the composition of the lunar *** landing site is located on ejecta strips in Von Karman crater that possibly originate from the neighboring Finsen crater.A surface rock and the lunar regolith at 10 sites along the rover Yutu-2 track were measured by the onboard Visible and Near-Infrared Imaging Spectrometer in the first three lunar days of mission *** situ spectra of the regolith have peak band positions at 1and 2μm,similar to the spectral data of Finsen ejecta from the Moon Mineralogy Mapper,which confirms that the regolith’s composition of the landing area is mostly similar to that of Finsen *** rock spectrum shows similar band peak positions,but stronger absorptions,suggesting relatively fresh *** rock may consist of 38.1±5.4%low-Ca pyroxene,13.9±5.1%olivine and 48.0±3.1%plagioclase,referred to as *** plagioclase-abundant and olivine-poor modal composition of the rock is inconsistent with the origin of the mantle,but representative of the lunar lower ***,the rock crystallized from the impact-derived melt pool formed by the SPA-impact event via mixing the lunar crust and mantle *** scenario is consistent with fast-cooling thermal conditions of a shallow melt pool,indicated by the fine to medium-sized texture (<3 mm) of the rock and the SPA-impact melting model[Icarus2012;220:730-43].

关键词： impact basin lunar interior composition visible and near-infrared spectra lunar rover Yutu-2 Chang’E-4 mission

Synthesis of a new 2,2':6',2''-terpyridine derivative and its coordination property

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chinese Chemical Letters 2007年第5期18卷 530-532页

作者： Yong Chen Xi Juan Zhao Jun Feng Zhang Wen fu fu technical institute of physics and chemistry Chinese Academy of Sciences Beijing 100080 China Graduate University of chinese academy of sciences Beijing 100039 China College of chemistry and Chemical Engineering Yunnan Normal University Kunming 650092 China

A novel compound, （E）-4′-（4-（but-1-en-3-ynyl）phenyl）-2,2′：6′,2″-terpyridine 1 was synthesized from 4′-（4-bromomethylphenyl）-2,2P：6P,2PP-terpyridine phosphonium salt 2 and propargylaldehyde via Wittig reaction, and characterized by EI-MS and ^1H NMR as well as elemental analysis. The spectral changes of the compound in the presence of transition metal ions, such as Cu（I） or Zn（ID, are investigated.

关键词： Polypyridine ligands Synthesis Coordination

Synthesis and Spectroscopic Properties of Cyclotriphosphazenes Containing 6-(4-Hydroxyphenyl)-2,2'-bipyridine Side Groups

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Chemical Research in chinese Universities 2007年第6期23卷 679-682页

作者： ZHANG Jun-feng GAN Xin OU xue-mei fu Wen-fu College of chemistry and Chemical Engineering Yunnan Normal University Kunming 650092 P. R. China technical institute of physics and chemistry Chinese Academy of Sciences Beijing 100080 P. R. China

Two novel cyclotriphosphazene derivatives containing 6- （4-hydroxyphenyl）-2,2′-bipyridine （hopbp） side groups, N3 P3 （dobp） 2 （hopbp） 2 （ 1 ） and N3 P3 （dobp）（hopbp） 4 （2）（ dobp = 2,2′-dioxybiphenyl）, were synthesized and characterized. These compounds display strong fluorescent emission both in solution and in solid state. Their absorption and emission spectra are sensitive to proton： the addition of HBF4 to the methanol and dichloromethane solution（9： 1, volume ratio） of compound 1 led to a red-shift from 350 to 460 nm for the emission spectrum, and the process was also characterized by isosbestic points of absorption spectra at 267, 287 and 313 nm.

关键词： Cyelotriphosphazene Bipyridine Proton Spectra

Multiphase flow physics of room temperature liquid metals and its applications

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Science china(Technological sciences) 2023年第6期66卷 1483-1510页

作者： QIAO MengWen XING ZeRong fu Jun-Heng liU Jing CAS Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryBeijing 100190China School of future Technology University of Chinese Academy of SciencesBeijing 100049China beijing Key Laboratory of Cryo-Biomedical Engineering Beijing 100190China College of Water Conservancy and Hydropower Engineering Sichuan Agricultural UniversityYa’an 625014China Department of Biomedical Engineering School of MedicineTsinghua UniversityBeijing 100084China

Multiphase flow existing everywhere in the motion evolution of nature,industrial processes,and daily life,has been an interdisciplinary cutting-edge frontier covering rather diverse *** multiphase flow of high melting metals typically involves gas/vapor-liquid two-phase fluidics which usually requests intense energy processes and therefore limits their applications to a large *** from this,the newly emerging room-temperature liquid metals(RTLMs)with fascinating metallic fluidic properties and multifunctional behaviors,not only well resolve the existing challenges facing conventional technologies,but also open up a series of new scientific and engineering *** the conceptual introduction of multiphase composites endows liquid metal with many unconventional fluidic *** further push forward the advancement of this new area,the present article is dedicated to systematically outlining the scientific category of RTLMs multiphase flow physics and interpreting its fundamental and practical *** vision is to provide insights into promising developmental directions of RTLMs multiphase flow and thus facilitate synergetic research and progress among different ***,the traditional metal multiphase flow was briefly ***,we summarized the physics of RTLMs multiphase flow,the common types of liquid metals,the basic physical and chemical properties of their multiphase flow and governing equations,*** that,various typical driving modalities and manipulation methods of RTLMs were ***,important implementations of RTLMs multiphase flow into thermal management,energy harvesting,catalysis,soft machines,biomedicine,and printed electronics were ***,the multiphase flow physics of RTLMs is currently still in its incubation stage and there exist tremendous opportunities and challenges which are worth further pursuing in the coming time.

关键词： room-temperature liquid metals multiphase flow physics composite solution nanofluids fluid mechanics micro-/nanodroplets

Anisotropic photoresponse of layered rhenium disulfide synaptic transistors

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chinese physics B 2021年第8期30卷 49-54页

作者： Chunhua An Zhihao xu Jing Zhang Enxiu Wu Xinli Ma Yidi Pang Xiao fu Xiaodong Hu Dong Sun Jinshui Miao Jing liu State Key Laboratory of Precision Measurement Technology and Instruments School of Precision Instruments and Opto-electronics EngineeringTianjin UniversityTianjin 300072China State Key Laboratory of Infrared physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China International Center for Quantum Materials School of PhysicsPeking UniversityBeijing 100871China

Layered ReS_(2) with direct bandgap and strong in-plane anisotropy shows great potential to develop high-performance angle-resolved photodetectors and optoelectronic ***,systematic characterizations of the angle-dependent photoresponse of ReS_(2) are still very ***,we studied the anisotropic photoresponse of layered ReS_(2) phototransistors in ***-resolved Raman spectrum and field-effect mobility are tested to confirm the inconsistency between its electrical and optical anisotropies,which are along 120°and 90°,*** further measured the angle-resolved photoresponse of a ReS_(2) transistor with 6 diagonally paired *** maximum photoresponsivity exceeds 0.515 A·W^(-1) along b-axis,which is around 3.8 times larger than that along the direction perpendicular to b axis,which is consistent with the optical anisotropic *** incident wavelength-and power-dependent photoresponse measurement along two anisotropic axes further demonstrates that b axis has stronger light-ReS_(2) interaction,which explains the anisotropic *** also observed angle-dependent photoresistive switching behavior of the ReS_(2) transistor,which leads to the formation of angle-resolved phototransistor *** has simplified structure to create dynamic optoelectronic resistive random access memory controlled spatially through polarized *** capability has great potential for real-time pattern recognition and photoconfiguration of artificial neural networks(ANN)in a wide spectral range of sensitivity provided by polarized light.

关键词： ReS2 in-plane anisotropy anisotropic photoresponse phototransistor

石墨烯关联材料包覆修饰高性能纤维的研究进展

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西华大学学报（自然科学版） 2022年第4期41卷 11-24页

作者：华阳李飞胡宁付绍云东北大学材料科学与工程学院辽宁沈阳110819 东北大学秦皇岛分校河北秦皇岛066004 中国科学院理化技术研究所北京100190 重庆大学航空航天学院重庆400044

碳纳米管、石墨烯、氧化石墨烯等石墨烯关联纳米材料具有很高的强度、模量、韧性和很大的表面积,可用于充当复合材料的增强体或涂覆修饰纤维类增强体的表面。本文综述近年来采用石墨烯关联材料来修饰纤维,从而改善纤维强化复合材料中纤... 详细信息

碳纳米管、石墨烯、氧化石墨烯等石墨烯关联纳米材料具有很高的强度、模量、韧性和很大的表面积,可用于充当复合材料的增强体或涂覆修饰纤维类增强体的表面。本文综述近年来采用石墨烯关联材料来修饰纤维,从而改善纤维强化复合材料中纤维和基体树脂之间界面性能的研究进展。首先概述碳纳米管、石墨烯、氧化石墨烯3种碳纳米材料的性能和应用,然后分别介绍他们在碳纤维和玻璃纤维表面的几种修饰方法,阐述在玻璃纤维表面协同包覆碳纳米管和氧化石墨烯时,纤维表面与树脂基体的浸润性、啮合作用和协同效应。最后,对下一步包覆的研究重点提出展望,指出在研制新型促进剂、偶联剂及协同包覆常规纤维等方面,尚需深入研究。

关键词：石墨烯关联材料碳纳米管碳纤维玻璃纤维修饰包覆

Improvement of the Two-Beam Coupling Response Time in Photorefractive Double-Doping KNbO_(3)

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chinese physics Letters 1997年第2期14卷 103-105页

作者： ZHANG Zhi-guo Y.Ding H.J.Eichler fu Pan-ming ZHOU Gang TANG Jun-xiong SHEN De-zhong MA Xiao-yan CHEN Jiong-yao Optical institute Technical University of BerlinStr.des 17Juni 13510623 BerlinGermany Laboratory of Optical physics Institute of Physics and Center for Condensed Matter PhysicsChinese Academy of SciencesBeijing 100080 Department of Radio-Electronics Peking UniversityBeijing 100871 Research institute of Synthetic Crystals Beijing 100018

We report experimental studies on the photorefractive response of KNbO_(3) doubly doped with manganese and rubidium,iron and rubidium,***-beam coupling response time in KNbO_(3):Mn:Rb is 3 to 10 times shorter while the two-beam coupling gain coefficient remains almost the same when compare with that in KNbO_(3):*** the other hand,under similar conditions,two-beam coupling response time in KNbO_(3):Fe:Rb is 6 times faster than that in KNbO_(3):Fe.

关键词： coupling beam faster