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Revolutionizing plasmonic platform via magnetic field-assisted confined ultrafast laser deposition of high-density,uniform,and ultrafine nanoparticle arrays

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International Journal of Extreme Manufacturing 2024年第3期6卷 428-438页

作者： Jin Xu Lingfeng Wang Peilin Yang Haoqing Jiang huai zheng Licong An Xingtao Liu Gary J Cheng School of Industrial Engineering Purdue UniversityWest LafayetteIN 47906United States of America Institute of Technological Sciences Wuhan UniversityWuhanHubei 430072People’s Republic of China

The remarkable capabilities of 2D plasmonic surfaces in controlling optical waves havegarnered significant ***,the challenge of large-scale manufacturing of uniform,well-aligned,and tunable plasmonic surfaces has hindered their *** address this,we present a groundbreaking tunable plasmonic platform design achieved throughmagnetic field(MF)assisted ultrafast laser direct deposition in *** precise control of metal nanoparticles(NPs),with cobalt(Co)serving as the model material,employing an MF,and fine-tuning ultrafast laser parameters,we have effectively converted coarse and non-uniform NPs into densely packed,uniform,and ultrafine NPs(~3 nm).This revolutionary advancement results in the creation of customizable plasmonic‘hot spots,’which play a pivotal role insurface-enhanced Raman spectroscopy(SERS)*** profound impact of this designable plasmonic platform lies in its close association with plasmonic resonance and *** the plasmonic nanostructures resonate with incident light,they generate intense local electromagnetic fields,thus vastly increasing the Raman scattering *** enhancement leads to an outstanding 2–18 fold boost in SERS performance and unparalleled sensing sensitivity down to 10^(-10)***,the plasmonic platform also demonstratesrobustness,retaining its sensing capability even after undergoing 50 cycles of rinsing andre-loading of ***,this work adheres to green manufacturing standards,making it an efficient and environmentally friendly method for customizing plasmonic‘hot spots’inSERS *** study not only achieves the formation of high-density,uniform,and ultrafine NP arrays on a tunable plasmonic platform but also showcases the profound relation betweenplasmonic resonance and energy *** outstanding results observed in SERS sensors further emphasize the immense potential of this technology for energy-relatedapplications,including photocatalysis,ph

关键词： magnetic field manipulation laser deposition metasurface SERS

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A polarization sensitive interferometer:Delta interferometer

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Chinese Physics B 2024年第3期33卷 369-377页

作者：卫超奇刘建彬董翼飞孙雨农周宇郑淮斌刘严严闫秀生李福利徐卓 Key Laboratory of Multifunctional Materials and Structures Ministry of Education & International Center for Dielectric ResearchSchool of Electronic Science and EngineeringXi'an Jiaotong UniversityXi'an 710049China MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Department of Applied PhysicsXi'an Jiaotong UniversityXi'an 710049China Science and Technology on Electro-Optical Information Security Control Laboratory Tianjin 300308China

A new type of polarization sensitive interferometer is proposed,named the Delta interferometer,inspired by its geometry resembling the Greek letter *** main difference between the Delta interferometer and other existing interferometers,such as Michelson,Mach-Zehnder and Young's double-slit interferometers,is that the two interfering paths are asymmetrical in the Delta *** visibility of the first-order interference pattern observed in the Delta interferometer is dependent on the polarization of the incidental *** coherence theory is employed to interpret this phenomenon and single-mode continuous-wave laser light is employed to verify the theoretical *** theoretical and experimental results are *** Delta interferometer is a perfect tool to study the reflection of electromagnetic fields in different polarizations and may find applications in polarization-sensitive scenarios.

关键词： phase sensitive interferometer Fresnel formula first-order interference

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NUMERICAL MODELING OF WASTEWATER TRANSPORT AND DEGRADATION IN SOIL AQUIFER

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Journal of Hydrodynamics 2006年第5期18卷 597-605页

作者： YIN Hai-long XU Zu-xin LI huai-zheng LI Song College of Environmental Science and Engineering Yongji University Shanghai 200092 China Shanghai Academy of Environment Sciences Shanghai 200233 China College of Environmental Science and Engineering Tongii University Shanghai 200092 China

Modeling of wastewater transport and degradation in soil aquifer is a problem of concern with regard to the optimization of design and operation of the wastewater soil treatment system. To solve this problem, three-dimensional groundwater flow and wastewater transport and degradation model was developed using MODFLOW and MT3DMS modeling. The developed model was calibrated using the Soil Infiltration Treatment System （SITS） in the Chongming island of China after considering the river-groundwater interaction and the regional geological and hydrological conditions. Using the calibrated model, the following problems with regard to the design and operation of SITS were discussed：（1） Allowable hydraulic load. The hydraulic load increases with the drop in the water level of the adjoining river, the increase in the actual soil area under operation, and the increase in the distance among the individual operation units of SITS. （2） Optimized layout of the groundwater monitoring wells. The concentration contour of the simulated contaminants is very useful to depict the typical areas that are most severely polluted and very sensitive to the peripheral environment,, thus lesser number of monitoring wells can be set up based on the model, and the goal of the accurate assessment of the influence of soil-infiltrated wastewater on groundwater can be achieved.

关键词： groundwater model wastewater soil aquifer hydraulic load

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车用空调控制器自动装配线视觉检测系统设计

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制造业自动化 2024年第4期46卷 190-194页

作者：吴怀峥唐旭晟严冰福州大学机械工程及自动化学院福州350116

我国的车用空调控制器自动装配线的检测任务主要靠人工完成,检测效率低,稳定性差,成本大且装配质量难以保证。为解决这一问题,基于机器视觉技术设计了应用于车用空调控制器自动装配线的视觉检测系统。系统包括对散热片点胶工位涂胶质量... 详细信息

我国的车用空调控制器自动装配线的检测任务主要靠人工完成,检测效率低,稳定性差,成本大且装配质量难以保证。为解决这一问题,基于机器视觉技术设计了应用于车用空调控制器自动装配线的视觉检测系统。系统包括对散热片点胶工位涂胶质量的合格判定,以及电路板烧录测试工位电极片与电容位置的检测。采用自动阈值分割、滤波处理、改进的双阈值大律算法、击中击不中、深度学习等多种视觉算法完成空调控制器的检测装配。经生产实践验证,该视觉系统可实现车用空调控制器装配线的自动检测,整个装配流程无需人工干预,极大地提高了装配效率和质量,检测成功率和生产效率满足基本需求。

关键词：机器视觉自动化装配线图像处理视觉检测深度学习

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具有抗菌功能的天然高分子絮凝剂研究进展

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应用化学 2024年第2期41卷 177-189页

作者：郑怀礼刘薇孙漫梨重庆大学环境与生态学院重庆400045

水中的细菌会对环境和人类健康造成一定的威胁,而传统的杀菌剂存在二次污染和稳定性差等问题,因此寻求更加高效、环保和可靠的细菌灭活方法,逐步替代传统消毒方式,已经成为水处理领域的重要研究方向。近年来,众多学术研究者积极探索具... 详细信息

水中的细菌会对环境和人类健康造成一定的威胁,而传统的杀菌剂存在二次污染和稳定性差等问题,因此寻求更加高效、环保和可靠的细菌灭活方法,逐步替代传统消毒方式,已经成为水处理领域的重要研究方向。近年来,众多学术研究者积极探索具有抗菌功能的天然高分子絮凝剂,这些材料基于天然高分子化合物如壳聚糖、淀粉和木质素等,不仅表现出环境友好、广泛来源和可再生的特性,还具备极高的改性潜力以满足复杂的实际应用需求。本综述详细阐述了近15年来具有抗菌功能的天然高分子絮凝剂领域的研究进展及应用现状。内容包括基材、改性方法、接枝单体、絮凝性能及机理、抗菌性能及机理等各个方面。此外,展望未来的研究方向,探讨如何进一步优化这些高分子絮凝剂的性能,以满足日益复杂的水处理需求,同时为未来的研究提供学术性观点。为进一步探索具有抗菌功能的天然高分子絮凝剂的学术研究提供深刻的内涵和理论支持。

关键词：絮凝絮凝剂抗菌天然高分子抗菌机理

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Simulations of Tapered Channel in Multilayer Graphene as Reverse Osmosis Membrane for Desalination

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Journal of Wuhan University of Technology(Materials Science) 2022年第3期37卷 314-323页

作者： WANG Tianzhen CHEN Bo SHAO Xingyu zheng huai HU Xuejiao JIANG Haifeng Key Laboratory of Hydraulic Machinery Transients(Wuhan University) Ministry of EducationSchool of Power and Mechanical EngineeringWuhan UniversityWuhan 430072China Research Institute of Tsinghua University in Shenzhen Shenzhen 518071China

Pressure-driven reverse osmosis membrane has important application in seawater *** by the structure of aquaporin,we established and studied the mechanism of the structure of multilayer graphene with tapered channels as reverse *** water flux of multilayer graphene with tapered channels was about 20%higher than that of parallel graphene *** flow resistance model was established,and the relationship between flow resistance and opening angles was *** relationship between flow resistance and outlet size was also *** means of molecular dynamics simulation,slip coefficients of multilayer graphene with tapered channel were obtained and verified by the contact angle of *** show that the permeability of graphene with tapered channel is about three orders of magnitude higher than that of commercial reverse osmosis membrane and the desalination rate is 100%.Temperature difference between the two sides of the tapered channel will promote the water flux positively.

关键词： multilayer graphene molecular dynamics tapered channel opening angles reverse osmosis

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A review on microstructures and properties of high entropy alloys manufactured by selective laser melting

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International Journal of Extreme Manufacturing 2020年第3期2卷 64-84页

作者： Chen Zhang Junkai Zhu huai zheng Hui Li Sheng Liu Gary J Cheng The Institute of Technological Sciences Wuhan UniversityWuhan 430072People's Republic of China School of Power and Mechanical Engineering Wuhan UniversityWuhan 430072People's Republic of China School of Industrial Engineering Purdue UniversityWest LafayetteIN 47906United States of America

High entropy alloys(HEAs)with multi-component solid solution microstructures have the potential for large-scale industrial applications due to their excellent mechanical and functional ***,the mechanical properties of HEAs limit the selection of processing *** manufacturing technology possesses strong processing adaptability,making itthe best candidate method to overcome this *** comprehensive review examines the current state of selective laser melting(SLM)of *** SLM to HEAs processing is motivated by its high quality for dimensional accuracy,geometric complexity,surface roughness,and *** review focuses on analyzing the current developments and challenges in SLM of HEAs,including defects,microstructures,and properties,as well as strengthing prediction models of fabricated *** review also offers directions for future studies to address existing challenges and promote technological advancement.

关键词： high entropy alloys selective laser melting microstructure property strengthening model

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Optical constants study of YAG：Ce phosphor layer blended with SiO2 particles by Mie theory for white light-emitting diode package

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Frontiers of Optoelectronics 2012年第2期5卷 138-146页

作者： Run HU Xiaobing LUO huai zheng Sheng LIU School of Energy and Power Engineering Huazhong University of Science and TechnologyWuhan 430074China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China

Optical constants, including scattering coefficient, absorption coefficient, asymmetry parameter and reduced scattering coefficient, of cerium-doped yttrium aluminium garnets （YAG：Ce） phosphor blended with SiO2 particle for white light-emitting diode （LED） packages were calculated based on Mie theory in this study. Calculation processes were presented in detail. Variations of the optical constants with the changes of phosphor weight fraction, dopant weight fraction, phosphor particle radius and SiO2 particle radius, were shown and analyzed separately. It was found that the asymmetry parameter is the intrinsic characteristic of the particles, and the increase of the phosphor weight fraction （or concentration） will lead to the increase of the optical constants. It was also discovered that the increase of the dopant weight fraction will enhance the scattering coefficient, but result in the decreases of the reduced scattering coefficient and the absorption coefficient.

关键词： Mie theory phosphor optical constant light-emitting diode (LED)

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Effects of packaging structure on optical performances of phosphor converted light emitting diodes

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Frontiers of Optoelectronics 2012年第2期5卷 153-156页

作者： Xing FU huai zheng Sheng LIU Xiaobing LUO School of Energy and Power Engineering Huazhong University of Science and TechnologyWuhan 430074China Division of MoEMS Wuhan National Laboratory for OptoelectronicsWuhan 430074China School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China

Effects of tilt angles of reflective cup structure and phosphor surface geometries on light extraction efficiency and angular color uniformity （ACU） of phosphor converted light emitting diodes （pcLED） are investigated by Monte Carlo ray-tracing simulations. It is found that tilt angles of reflective cup and phosphor surface geometries affect the light extraction efficiency and the ACU distinctly. When the tilt angle varied from 60° to 15°, the light extraction efficiency of LED can achieve the improvements of 13.87%, 18.25% and 14.79% respectively, when the phosphor surface geometry is concave, flat and convex, respectively. It is also found the variety law of phosphor concentrations with the change of tilt angles and phosphor surface geometries to maintain a fixed correlated color temperature （CCT）.

关键词： phosphor packaging structure reflective cup,light emitting diodes (LEDs)

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A V_(2)O_(3)@N-C cathode material for aqueous zinc-ion batteries with boosted zinc-ion storage performance

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Rare Metals 2022年第5期41卷 1605-1615页

作者： huai-zheng Ren Jian Zhang Bo Wang Hao Luo Fan Jin Tian-Ren Zhang An Ding Bo-Wen Cong Dian-Long Wang MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage State Key Laboratory of Urban Water Resource and EnvironmentSchool of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China Tianneng Group Changxing 313100China

The discontinuity of new types of clean energy,such as wind power and solar cells, has promoted the development of large-scale energy storage systems(EES).Rechargeable aqueous zinc-ion batteries(ZIBs) have received extensive attention due to their inherent safety and low cost. At this stage, the performance of ZIBs is still limited by cathode materials. In this work, we have constructed a ZIBs cathode material-V_(2)O_(3)@N–C, through surface coating and N atom doping. The N-doped carbon coating endows V_(2)O_(3)@N–C with excellent structural stability and enhances its electrical conductivity. As a result,V_(2)O_(3)@N–C cathode delivers exceptional reversible of Zn^(2+) intercalation/deintercalation. The fabricated Zn/V_(2)O_(3)@N–C batteries exhibit high capacity of 274.6 mAh·g^(-1) at 5 A·g^(-1) and excellent capacity retention of 94% after 2000 cycles. The reversible intercalation/deintercalation of Zn^(2+) in the V_(2)O_(3)@N–C cathode is proved by ex-situ testing methods. It is believed that this work should inject new vitality into the development of ZIBs cathode.

关键词： Zinc-ion batteries V_(2)O_(3)@N-C cathode Structural design Carbon layer N atom doping

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