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Ultrafast pulse-dilation framing camera and its application for time-resolved X-ray diagnostic

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Nuclear Science and Techniques 2024年第7期35卷 101-114页

作者： hou-Zhi Cai Qiu-Yan luo Kai-Xuan lin Xuan Deng Jun-Kai liu Kai-Zhi Yang Dong Wang Jia-Jie Chen Jia-heng Wang Jing-hua long li-hong Niu Yun-Fei lei Jin-Yuan liu key laboratory of optoelectronic devices and Systems of Ministry of Education and Guangdong Province Shenzhen Key Laboratory of Photonics and BiophotonicsCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen518060China

An ultrafast framing camera with a pulse-dilation device,a microchannel plate(MCP)imager,and an electronic imaging system were *** camera achieved a temporal resolution of 10 ps by using a pulse-dilation device and gated MCP imager,and a spatial resolution of 100μm by using an electronic imaging system comprising combined magnetic *** spatial resolution characteristics of the camera were studied both theoretically and *** results showed that the camera with combined magnetic lenses reduced the field curvature and acquired a larger working area.A working area with a diameter of 53 mm was created by applying four magnetic lenses to the ***,the camera was used to detect the X-rays produced by the laser-targeting *** diagnostic results indicated that the width of the X-ray pulse was approximately 18 ps.

关键词： Inertial confinement fusion Plasma diagnostics Framing camera Combined lenses Pulse-dilation

hybrid 2D/3D Graphitic Carbon Nitride-Based high-Temperature Position-Sensitive Detector

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Energy & Environmental Materials 2024年第1期7卷 279-287页

作者： Xuexia Chen Dongwen Yang Xun Yang Qing lou Zhiyu liu Yancheng Chen Chaofan lv lin Dong Chongxin Shan henan key laboratory of Diamond optoelectronic Materials and devices Key Laboratory of Material Physics Ministry of Education School of Physics and Microelectronics Zhengzhou University

Ultraviolet position-sensitive detectors(PSDs) are expected to undergo harsh environments,such as high temperatures,for a wide variety of applications in military,civilian,and ***,no report on relevant PSDs operating ... 详细信息

关键词： graphitic carbon nitride high-temperature stability lateral photovoltaic effect position-sensitive detectors two-dimensional materials

In vivo label-free measurement of blood flow velocity symmetry based on dual line scanning third-harmonic generation microscopy excited at the 1700 nm window

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Journal of Innovative Optical health Sciences 2024年第1期17卷 61-68页

作者： hui Cheng Jincheng Zhong Ping Qiu Ke Wang key laboratory of optoelectronic devices and Systems of Ministry of Education and Guangdong Province College of Physics and optoelectronic Engineering Shenzhen University Shenzhen 518060 P.R.China

Measurement of bloodflow velocity is key to understanding physiology and pathology in *** most measurements are performed at the middle of the blood vessel,little research has been done on characterizing the instantaneous bloodflow velocity *** is mainly due to the lack of measurement technology with high spatial and temporal ***,we tackle this problem with our recently developed dual-wavelength line-scan third-harmonic generation(ThG)imaging *** acquisition of dual-wavelength ThG line-scanning signals enables measurement of bloodflow velocities at two radially symmetric positions in both venules and arterioles in mouse brain in *** results clearly show that the instantaneous bloodflow velocity is not symmetric under general conditions.

关键词： 1700 nm-Window third-harmonic generation imaging blood flow velocity

Broadband high-efficiency dielectric metalenses based on quasi-continuous nanostrips

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Opto-Electronic Advances 2024年第5期7卷 43-51页

作者： Xiaohu Zhang Qinmiao Chen Dongliang Tang Kaifeng liu haimo Zhang lintong Shi Mengyao he Yongcai Guo Shumin Xiao key laboratory of optoelectronic Technology and Systems of the Education Ministry of China Chongqing UniversityChongqing 400044China Ministry of Industry and Information Technology key lab of Micro-Nano optoelectronic Information System Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic SystemsHarbin Institute of TechnologyShenzhen 518055China key laboratory for Micro/Nano optoelectronic devices of Ministry of Education&hunan Provincial key laboratory of low-Dimensional Structural Physics and devices School of Physics and ElectronicsHunan UniversityChangsha 410082China

Benefiting from the abrupt phase changes within subwavelength thicknesses,metasurfaces have been widely applied for lightweight and compact optical *** broadband and high-efficiency characteristics are highly attractive for the practical implementation of ***,current metasurface devices mostly adopt discrete micro/nano structures,which rarely realize both merits *** this paper,dielectric metasurfaces composed of quasi-continuous nanostrips are proposed to overcome this *** quasi-continuous nanostrips metasurface,a normal focusing metalens and a superoscillatory lens overcoming the diffraction limit are designed and experimentally *** quasi-continuous metadevices can operate in a broadband wavelength ranging from 450 nm to 1000nm and keep a high power *** average efficiency of the fabricated metalens reaches 54.24%,showing a significant improvement compared to the previously reported metalenses with the same *** proposed methodology can be easily extended to design other metadevices with the advantages of broadband and high-efficiency in practical optical systems.

关键词： broadband high-efficiency metalens sub-diffraction quasi-continuous

Organic interfacial engineering of gold nanowires for selective glycerol electrooxidation

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Chinese Chemical letters 2024年第3期35卷 502-507页

作者： Zhe Wang Qingling hong Boqiang Miao Tianjiao Wang Yu Ding Pujun Jin Pei Chen Yu Chen key laboratory of Macromolecular Science of shaanxi Province Key Laboratory of Applied Surface and Colloid Chemistry(Ministry of Education)Shaanxi Key Laboratory for Advanced Energy DevicesSchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an 710062China

The selective electrochemical conversion of glycerol into value-added products is a green and sustainable strategy for the biomass *** this work,Au nanowires(Au-NW)modified with polyethyleneimine(PEI)molecule(Au-NW@PEI)is obtained by an up-bottom post-modification *** characterization,molecular dynamics simulation and density functional theory demonstrate that the loose-packed PEI monolayer firmly and uniformly distribute on the Au-NW surface due to the strong Au-N *** experiments and product analysis display that PEI modification significantly enhance the electro-activity of Au-NW for the glycerol electro-oxidation reaction(GEOR)due to the electronic ***,the steric hindrance and electrostatic effect of PEI layer make the optimizing adsorption of intermediates ***,the selectivity of C3 product glyceric acid over Au-NW@PEI is increased by nearly 20%.The work thus indicates that the rational design of metal-organic interface can effectively elevate the electro-activity and selectivity of Au nanostructures,which may have wide application in biomass development.

关键词： Glycerol electrooxidation reaction Organic interface engineering Gold-based nanomaterials Electrocatalysis Selectivity

Cationic engineered nanodiamonds for efficient antibacterial surface with strong wear resistance

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Nano Research 2024年第3期17卷 939-948页

作者： Fu-Kui li Wen-Bo Zhao Yong Wang Wen-Tao huang Ya-lun Ku hang liu Rui Guo hui-hui Yu Kai-Kai liu Chong-Xin Shan henan key laboratory of Diamond optoelectronic Materials and devices Key Laboratory of Materials PhysicsMinistry of Educationand School of Physics&MicroelectronicsZhengzhou UniversityZhengzhou 450052China

The spread of diseases caused by bacterial adhesion and immobilization in public places constitutes a serious threat to public *** of bacteria spread by the construction of an antibacterial surface takes precedence over post-infection ***,we demonstrate an effective antibacterial surface with strong wear resistance by constructing cationic engineered nanodiamonds(C-NDs).The C-NDs with positive surface potentials interact effectively with bacteria through electrostatic interactions,where the C-NDs act on the phospholipid bilayer and lead to bacterial membrane collapse and rupture through hydrogen bonding and residual surface oxygen-containing reactive *** this case,bactericidal rate of 99.99%and bacterial biofilm inhibition rate of more than 80%can be achieved with the C-NDs concentration of 1 mg/*** addition,the C-NDs show outstanding antibacterial stability,retaining over 87%of the antibacterial effect after stimulation by adverse environments of heat,acid,and external ***,an antibacterial surface with high wear resistance obtained by integrating C-NDs with commercial plastics has been *** antibacterial surface with a mass fraction of 1 wt.%C-NDs improved abrasion resistance by 3981 times,with 99%killing of adherent *** work provides an effective strategy for highly efficient antibacterial wear-resistant surface,showing great practical applications in public health environments.

关键词： antibacterial surface cationic engineered nanodiamonds wear-resistant

Flat-top beam illumination for polarization-sensitive second-harmonic generation microscopy

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Chinese Optics letters 2024年第6期22卷 164-169页

作者： Bing Wang Xiang li Wenhui Yu Binglin Shen Rui hu Junle qu liwei liu State key laboratory of Radio Frequency heterogeneous Integration Shenzhen UniversityShenzhen 518060China key laboratory of optoelectronic devices and Systems of Guangdong Province and Ministry of Education College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China

Wide-field second-harmonic generation (ShG) was used to obtain the second-harmonic signal from the entire image area for rapid imaging, despite the fact that conventional Gaussian beam illumination has low energy utilization efficiency,which makes it easy to overexpose the intensity of the image center area. however, flat-top beam illumination has uniform spatial distribution, thereby improving the photon excitation efficiency in the entire image region and reducing laser damage and thermal effect. By combining flat-top beam illumination and wide-field ShG polarization measurement, we can calculate more myosin fibril symmetrical axis orientations through polarization analysis of 16 images at a fast imaging speed while expanding the field of view. More importantly, the application of a flat-top beam can further improve the capability of polarization measurement in ShG microscopy.

关键词： flat-top beam second-harmonic generation muscle structure

Rational design multi-color-emissive chemiluminescent carbon nanodots in a single solvothermal reaction

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Nano Research 2024年第6期17卷 4651-4660页

作者： Guang-Song Zheng Cheng-long Shen Yuan Deng Kai-Kai liu Jin-hao Zang lin Dong Qing lou Chong-Xin Shan henan key laboratory of Diamond optoelectronic Materials and devices Key Laboratory of Materials PhysicsMinistry of Educationand School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China

Recently,the chemiluminescence(Cl)induced by carbon nanodots(CDs)has intrigued researchers’extensive interests in various applications due to its special light emission ***,the difficulty of synthesizing chemiluminescent CDs with full-spectrum emission severely hinders the further regulation of the Cl emission ***,the multi-color-emissive chemiluminescent CDs are rational designed and further synthesized by regulating the sp2-hybrid core and sp3-hybrid surface from the citrate-ammonia molecular in a single solvothermal *** experimental characterizations and density functional theory calculations reveal that the higher temperature can promote the crosslinking polymerization/carbonization of carbon core and the higher protonation of solvent can determine the core size of final CDs,resulting in the variant Cl emission from molecular-,crosslinking-and ***,the Cl emission of the CDs can be further synthesized by tuning the luminescence chromophores in the formation process via regulating the temperature and solvent,enabling the applications of the Cl CDs in illumination and information *** study paves a new technology to understand the luminescence of CDs and affords an industry translational potential over traditional chemiluminescent molecular.

关键词： carbon nanodots chemiluminescence regulation energy level alignment mechanism

Ultra-homogeneous dense Ag nano layer enables long lifespan solid-state lithium metal batteries

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Journal of Energy Chemistry 2024年第9期96卷 110-119页

作者： Yaning liu Tianqi Yang Ruyi Fang Chengwei lu Ruojian Ma Ke Yue Zhen Xiao Xiaozheng Zhou Wenkui Zhang Xinping he Yongping Gan Jun Zhang Xinhui Xia hui huang Xinyong Tao Yang Xia College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014ZhejiangChina key laboratory of Rare Earth optoelectronic Materials and devices of Zhejiang Province Institute of Optoelectronic Materials and DevicesChina Jiliang UniversityHangzhou 310018ZhejiangChina

The unstable electrolyte/lithium(li)anode interface has been one of the key challenges in realizing high energy density solid-state lithium metal batteries(lMBs)***,a dense and uniform silver(Ag)nano interlayer with a thickness of∼35 nm is designed accurately by magnetron sputtering technology to optimize the electrolyte/li anode *** Ag nano layer reacts with li metal anode to in-situ form li-Ag alloy,thus enhancing the physical interfacial contact,and further improving the interfacial wettability and *** particular,the li-Ag alloy is inclined to form Agli phase proved by cryo-TEM and DFT,effectively preventing SN from continuously“attacking”the li metal anode due to the lower adsorption of succinonitrile(SN)molecules on Agli than that of pure li metal,thereby significantly reinforcing the interfacial ***,the enhanced physical and chemical stability of electrolyte/li anode interface promotes the homogeneous deposition of li^(+)and inhibits the dendrite *** li-symmetric cell maintains stable operation for up to 1700 h and the cycling stability of liFePO_(4)|SPE|li full cell is remarkably improved at room temperature(capacity retention rate of 91.9%for 200 cycles).This work opens an effective way for accurate and controllable interface design of long lifespan solid-state lMBs.

关键词： Silvernano layer Poly(ethylene oxide) Solid polymer electrolyte Succinonitrile lithium metal battery