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7th Optics Young Scientist Summit, OYSS 2024

作者： Sun, Bingheng Ren, Zhong Liang, Gaoqiang Jiangxi Provincial Key Laboratory of Advanced Electronic Materials and Devices Jiangxi Science and Technology Normal University Nanchang330038 China Key Laboratory of Optic-electronic Detection and Information Processing of Nanchang City Jiangxi Science and Technology Normal University Nanchang330038 China

ISBN: (数字)9781510688377

ISBN: (纸本)9781510688360

Photoacoustic imaging is a kind of rapidly advancing noninvasive detection technology based on the photon-induced-acoustic effect, which holds the significant potential applications in the biomedical imaging diagnosis field. This technique merges the high contrast capabilities of optical imaging with the deep penetration and high resolution of acoustic imaging. In our work, to study the interaction mechanisms and photoacoustic effects between pulsed laser and capillaries in skin tissue, finite element analysis (FEA) based on COMSOL multiphysis software was employed. Based on the established finite element bio-tissue model, the photoacoustic effect was fully and completely represented as a sequence of light absorption, thermal expansion, and ultrasound wave generation in the bio-tissue, involving the coupling of multiple physical fields and the numerical resolution of partial differential equations. Moreover, in our study, the effects of varying induced wavelengths, capillaries depths in tissue, and absorber sizes on the time-domain photoacoustic signals and photoacoustic intensity were numerical investigated. Numerical results show that the blood in capillaries has stronger photoacoustic effect in the visible light waveband due to the characteristic absorption of hemoglobin in capillaries. The photoacoustic intensity decreases with the increase of capillary radius and depth. To validate the availability of the numerical simulation, the corresponding photoacoustic experiments were performed. In the experiments, we constructed a photoacoustic microscopy detection system and experimentally studied the photoacoustic effects of several influence factors. The experimental results confirm the accuracy of our numerical simulations and provide theoretical insights for future applications of vascular or capillaries photoacoustic imaging in the biomedical field. © 2025 SPIE.

关键词： Tissue

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Promoting intramolecular charge transfer of graphitic carbon nitride by donor-acceptor modulation for visible-light photocatalytic H_(2) evolution

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Interdisciplinary materials 2022年第2期1卷 294-308页

作者： Sijie Wan Jingsan Xu Shaowen Cao Jiaguo Yu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanChina School of Chemistry and Physics Queensland University of TechnologyBrisbaneQueenslandAustralia

To satisfy the requirements of substantial green development,it is urgent to explore an innovative eco‐friendly semiconductor photocatalyst to efficiently achieve visible‐light‐driven photocatalytic H 2 evolution(PHE).The strategy of promoting the spatial separation efficiency of photoinduced carriers can essentially enhance the PHE performance of a ***,a graphitic carbon nitride(g‐C 3 N 4)‐based donor–acceptor(D‐A)copolymer(CNDM x)is constructed by simple one‐pot thermal polycondensation,using urea and 5,8‐DibroMoquinoxaline(as an electron donor)as *** electron D-A modulation consequently creates an internal electric field to facilitate the intramolecular charge transfer within the copolymer.A series of experimental characterizations and density functional theory calculations are applied to elucidate the variation and correlation of the structure and PHE performance of the as-prepared *** is found that the best average PHE rate of 3012.5μmolg^(−1) h^(−1) can be achieved over the optimal D-A copolymer under visible‐light(400<λ<800nm)irradiation,which is~3.3 times that of pure urea-derived g-C_(3)N_(4).The corresponding apparent quantum efficiency is 1.3% at *** study provides a protocol for designing effective visible-light photocatalysts via D-A modulation of polymeric semiconductors.

关键词： carbon nitride D-A copolymer internal electric field intramolecular charge transfer photocatalysis

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Defect engineering and Ni promoter synergistically accelerating electron transfer to Ru^(0) sites in UiO-66(Ce) for dicyclopentadiene hydrogenation under mild condition

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Nano Research 2024年第11期17卷 9550-9563页

作者： Rushuo Li Tao Ban Danfeng Zhao Jing Lin Zhiyuan Liu Linmeng Wang Xiubing Huang Zhiping Tao Ge Wang Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule and Structure Construction School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China Sinopec Research Institute of Petroleum Processing Co. Ltd. Beijing 100083 China

Olefin hydrogenation under mild condition is crucial and challenging for industrial applications. Herein, defective UiO-66(Ce) was constructed by using cyanuric acid as the molecular etching “scissors” and further to synthesize heterogeneous catalyst with highly dispersed RuNi nanoparticles (Ru1Ni1.5@UiO-66(Ce)-12 h). The construction of Ce-O-Ru/Ni heterogeneous interfaces and Ni–Ru bonds provide electron transfer channels from Ce-oxo clusters and Ni species to Ru species. Furthermore, the microenvironment and electronic structure of Ru0 active sites were synergistically regulated by adjusting the content of metal-organic frameworks (MOFs) defects and Ni promoter, thereby enhancing the adsorption and activation ability of H–H and C=C bonds. Therefore, Ru1Ni1.5@UiO-66(Ce)-12 h achieved dicyclopentadiene saturated hydrogenation (100% conversion) to tetrahydrodicyclopentadiene (∼ 100% selectivity) under mild condition (35℃, 1 MPa) with only 25 min. Meanwhile, the sample exhibited excellent structural stability after 6 cycles test. This study provides a promising strategy for the rational design of remarkable noble metal-based catalysts for practical applications.

关键词： metal-organic frameworks defect engineering Ni promoter electron-rich Ru^(0)active sites dicyclopentadiene hydrogenation

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Enhancing the tensile properties of laser repairing Ti-6Al-4V alloys:Optimization of strain distribution based on composition fine-turning

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Journal of materials Science & technology 2024年第34期201卷 1-11页

作者： Hengxin Zhang Geng Wang Sen Yang Nan Wang Konda Gokuldoss Prashanth Zimeng Ye Kexin Zhao Fengying Zhang Hua Tan School of Material Science and Engineering Chang’an UniversityXi’an 710064PR China Beijing Institute of Remote Sensing Equipment Beijing 100854PR China Tallinn University of Technology Department of Mechanical and Industrial EngineeringEhitajate tee 519086 TallinnEstonia State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072PR China

In the context of laser repairing damaged forging titanium(Ti)alloys,a common challenge is the sig-nificant reduction in elongation of the repaired samples compared to that of the *** this work,directed energy deposition(DED)technology was employed to repair the TC4(Ti-6Al-4V)forgings by ma-nipulating the Al and V contents of the repaired zone(RZ).Subsequent evaluation encompassed the mi-crostructure,microhardness,and tensile properties across the laser repair deposition samples(LRDs).The results revealed that despite the LRD TC4-0Ti’s strength reaching 97.80%of the substrate,its elongation is only 43.93%of the *** appropriately reducing the Al and V contents of RZ,the LRD TC4-5Ti demonstrates a strength of 935.04 MPa and an elongation of 14.59%,achieving 98.70%and 82.38%of the substrate,*** the Al and V contents of RZ are further decreased,the strength of the LRDs gradually diminishes,falling below the forging *** digital image correlation(DIC)technology,the deformation behavior of different zones during the tensile process of these LDRs was *** results indicated a concentration of strain distribution within either RZ or the substrate zone(SZ)of the LRDs during the tensile process,which signifies the mismatch of deformation capacity between these two ***,the tensile properties of the LRDs were adversely *** judiciously adjusting the Al and V contents of RZ,the abovementioned mismatch phenomenon can be ameliorated,which facilitates a synergistic strain behavior between SZ and RZ during the tensile process,aiding in the homogenization of strain distribution and consequently enhancing the tensile properties of the LRDs.

关键词： Titanium alloy Laser repair deposition Digital image correlation Strain behavior Tensile properties

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Improving the water electrolysis performance by manipulating the generated nano/micro-bubbles using surfactants

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Nano Research 2023年第1期16卷 420-426页

作者： Houpeng Wang Zhaoxiang Xu Wei Lin Xue Yang Xianrui Gu Wei Zhu Zhongbin Zhuang SINOPEC Research Institute of Petroleum Processing Beijing 100083China State Key Lab of Organic-Inorganic Composites and Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of Energy Environmental Catalysis Beijing University of Chemical TechnologyBeijing 100029China

The impeded mass transfer rate by on-site-generated gas bubbles at both cathode and anode dramatically reduces the energy conversion efficiency of the proton exchange membrane water electrolyzer(PEMWE).Herein,we report a surfactant-assistant method to accelerate the nano/micro-bubble detachment and the mass transfer rate by reducing the surface tension,resulting in an increase in overall *** kinds of surfactants are studied in this *** potassium perfluorobutyl sulfonate(PPFBS),which has the structural similarity to Nafion,shows a significant promotion of activity and stability for both hygrogen evolution reaction(HER)and oxygen evolution reaction(OER)in the acidic medium at the high current density *** HER overpotential at 0.1 A·cm−2 decreased 22%,and the current density at−0.4 V increased 31%by adding *** promotion of overall efficiency by PPFBS on a homemade PEMWE was also *** reduced surface tension and electrostatic repulsion were the probable origins of the accelerated bubble detachment.

关键词： proton exchange membrane water electrolysis bubble overpotential surfactant electrostatic repulsion

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Regulating crystallization and retarding oxidation in Sn-Pb perovskite via 1D cation engineering for high performance all-perovskite tandem solar cells

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Journal of Energy Chemistry 2025年第1期100卷 646-652页

作者： Ranran Liu Xin Zheng Zaiwei Wang Miaomiao Zeng Chunxiang Lan Shaomin Yang Shangzhi Li Awen Wang Min Li Jing Guo Xuefei Weng Yaoguang Rong Xiong Li Michael Grätzel Center for Mesoscopic Solar Cells Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074HubeiChina Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055GuangdongChina School of Chemistry Chemical Engineering and Life SciencesState Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of Technology430070HubeiChina Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO) Chinese Academy of SciencesSuzhou 215123JiangsuChina School of Physics and Optoelectronic Engineering Hainan UniversityHaikou 570228HainanChina

All-perovskite tandem solar cells have the potential to surpass the theoretical efficiency limit of single junction solar cells by reducing thermalization ***,the challenges encompass the oxidation of Sn^(2+)to Sn^(4+)and uncontrolled crystallization kinetics in Sn-Pb perovskites,leading to nonradiative recombination and compositional heterogeneity to decrease photovoltaic efficiency and operational ***,we introduced an ionic liquid additive,1-ethyl-3-methylimidazolium iodide (EMIMI) into Sn-Pb perovskite precursor to form low-dimensional Sn-rich/pure-Sn perovskites at grain boundaries,which mitigates oxidation of Sn^(2+)to Sn^(4+)and regulates the film-forming dynamics of Sn/Pb-based perovskite *** optimized single-junction Sn-Pb perovskite devices incorporating EMIMI achieved a high efficiency of 22.87%.Furthermore,combined with wide-bandgap perovskite sub-cells in tandem device,we demonstrate 2-terminal all-perovskite tandem solar cells with a power conversion efficiency of 28.34%,achieving improved operational stability.

关键词： All-perovskite tandem solar cells Sn-Pb perovskite 1D Regulated crystallization Antioxidation

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Scalable fabrication of graphene-assembled multifunctional electrode with efficient electrochemical detection of dopamine and glucose

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Nano Research 2023年第5期16卷 6361-6368页

作者： Xiaodong Ji Xin Zhao Zixin Zhang Yunfa Si Wei Qian Huaqiang Fu Zibo Chen Zhe Wang Huihui Jin Zhugen Yang Daping He State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China Hubei Engineering Research Center of RF-Microwave Technology and Application Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China School of Information Engineering Wuhan University of TechnologyWuhan 430070China School of Water Energy and EnvironmentCranfield UniversityMilton KeynesMK430ALUK

Conventional glassy carbon electrodes(GCE)cannot meet the requirements of future electrodes for wider use due to low conductivity,high cost,non-portability,lack of ***,cost-effective and wearable electrode enabling rapid and versatile molecule detection is becoming important,especially with the ever-increasing demand for health monitoring and point-ofcare *** is considered as an ideal electrode due to its excellent physicochemical ***,we prepare graphene film with ultra-high conductivity and customize the 3-electrode system via a facile and highly controllable laser engraving *** from the ultra-high conductivity(5.65×10^(5)S·m^(−1)),the 3-electrode system can be used as multifunctional electrode for direct detection of dopamine(DA)and enzyme-based detection of glucose without further metal *** dynamic ranges from 1–200μM to 0.5–8.0 mM were observed for DA and glucose,respectively,with a limit of detection(LOD)of 0.6μM and 0.41 ***,the excellent target detection capability caused by the ultra-high conductivity and ease modification of graphene films,together with their superb mechanical properties and ease of mass-produced,provides clear potential not only for replacing GCE for various electrochemical studies but also for the development of portable and highperformance electrochemical wearable medical devices.

关键词： graphene film ultra-high conductivity multifunctional electrode point-of-care diagnosis wearable medical devices

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Synthesis and mechanical and elevated temperature tribological properties of a novel high-entropy(TiVNbMoW)C_(4.375) with carbon stoichiometry deviation

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Journal of advanced Ceramics 2023年第2期12卷 242-257页

作者： Jicheng LI Yanchun ZHOU Yunfeng SU Shuna CHEN Qiuan SUN Hengzhong FAN Junjie SONG Litian HU Yongsheng ZHANG State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials&Processing TechnologyBeijing 100076China

High-entropy carbides are a nascent group of ceramics that are promising for high-temperature applications due to the combination of good stability,high hardness(H),high strength,and superior creep resistance that they *** to high melting points and low lattice diffusion coefficients,however,the high-entropy carbides are usually difficult to consolidate to a nearly full *** cope with this challenge,herein,binary carbides including TiC,V_(8)C_(7),NbC,Mo_(2)C,and WC with different carbon stoichiometry were used to prepare dense high-entropy(TiVNbMoW)C_(4.375),and the influence of carbon vacancy on formation ability and mechanical properties of carbon-deficient high-entropy(TiVNbMoW)C_(4.375) were ***,although the starting binary carbides have different crystal structures and carbon stoichiometry,the as-prepared high-entropy material showed a rock-salt structure with a relatively high density(98.1%)and good mechanical properties with hardness of 19.4±0.4 GPa and fracture toughness(KIC)of 4.02 MPa·m^(1/2).More importantly,the high-entropy(TiVNbMoW)C_(4.375) exhibited low coefficient of friction(COF)at room temperature(RT)and 800℃.Wear rate(W)gradually increased with the temperature rising,which were attributed to the formation of low-hardness oxidation films at high temperatures to aggravate *** 800℃,lubricating films formed from sufficient oxidation products of V_(2)O_(5) and MoO_(3) effectively improved tribological behavior of the high-entropy(TiVNbMoW)C_(4.375).Wear mechanisms were mainly abrasive wear resulting from grain pullout and brittle fracture as well as oxidation wear generated from high-temperature *** results are useful as valuable guidance and reference to the synthesis of high-entropy ceramics(HECs)for sliding parts under high-temperature serving conditions.

关键词： high-entropy ceramics(HECs) transition metal(TM)carbides carbon stoichiometry deviation tribological performances wear

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Vertically mounting molybdenum disulfide nanosheets on dimolybdenum carbide nanomeshes enables efficient hydrogen evolution

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Nano Research 2022年第5期15卷 3946-3951页

作者： Tingting Wang Pengyan Wang Yajun Pang Yitian Wu Jin Yang Hao Chen Xiaorui Gao Shichun Mu Zongkui Kou State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China College of Chemistry and Materials Engineering Zhejiang A&F UniversityHangzhou 311300China Jiangsu Laboratory of Advanced Functional Materials School of Electronic and Information EngineeringChangshu Institute of TechnologyChangshu 215500China

Designing hierarchical heterostructure to optimize the adsorption of hydrogen intermediate(H*)is impressive for hydrogen evolution reaction(HER)***,we show that vertically mounting two-dimensional(2D)layered molybdenum disulfide(MoS_(2))nanosheets on 2D nonlayered dimolybdenum carbide(Mo_(2)C)nanomeshes to form a hierarchical heterostructure largely accelerates the HER kinetics in acidic electrolyte due to the weakening adsorption strength of H*on 2D Mo_(2)C *** hierarchical MoS2/Mo2C heterostructure therefore gives a decrease of overpotential for up to 500 mV at-10 mA·cm^(-2)and an almost 200-fold higher kinetics current density compared with the pristine Mo2C nanomeshes and maintains robust stability with a small drop of overpotential for only 16 mV upon 5,000 *** further rationalize this finding by theoretical calculations and find an optimized adsorption free energy of H*,identifying that the MoS_(2)featuring strong H*desorption plays a key role in weakening the strong binding of Mo_(2)C with H*and therefore improves the intrinsic HER activity on active C sites of Mo_(2)*** present finding shines the light on the rational design of heterostructured catalysts with synergistic geometry.

关键词： hydrogen evolution reaction transition metal carbide transition metal disulfide two-dimensional nonlayered/layered heterostructure hydrogen adsorption/desorption

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Metal-slag separation strengthening through in situ slagging during CuW composite preparation by metallothermic reduction

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Rare Metals 2024年第11期43卷 6113-6121页

作者： Chu Cheng Xin-Yu Wang Ting-An Zhang Zhi-He Dou Ke-Xing Song Meng-Xin Wang Yan-Shuo Feng Tao Huang Hai-Tao Liu Xiao-Heng Li Kai Li School of Materials Science and Engineering Henan University of Science and TechnologyLuoyang 471023China Provincial and Ministerial Co-Construction of Collaborative Innovation Center for Non-Ferrous Metal New Materials and Advanced Processing Technology Luoyang 471023China Henan Key Laboratory of Non-Ferrous Materials Science&Processing Technology Henan University of Science and TechnologyLuoyang 471003China Key Laboratory of Ecological Utilization of Multi-Metal Intergrown Ores of Ministry of Education Northeastern UniversityShenyang 110819China Henan Key Laboratory of Advanced Conductor Materials Institute of MaterialsHenan Academy of Sciences Henan Academy of SciencesZhengzhou 450002China Henan Zhongyuan Gold Smelter. LLCSanmenxia 472100China Henan Pinggao Electric Co. LTDPingdingshan 467000China

CuW is widely used in high-voltage electrical switch contacts,rocket nozzle throat linings,electronic packaging materials and other major high-end *** is typically fabricated using infiltration and high-temperature sintering methods based on powder *** CuW composites fabricated using these methods have the disadvantages of low density and uneven microstructural distribution,the preparation of CuW composites by alu-minothermic reduction was proposed.

关键词： composites composite preparation

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