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Nano Research 2023年第4期16卷 4793-4802页

作者： Weiyuan Ding Ali Saad yuchen wu Zhiwei Wang Xiuting Li Institute for Advanced Study Shenzhen UniversityShenzhen 518060China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China

Rational construction of active components has been the biggest challenge in preparing efficient bifunctional oxygen ***,electrospinning and chemical vapor deposition(CVD)were employed to embed active species including FeCo nanoparticles,MNx(M=Fe,Co),and FePx in porous and graphitized carbon nanotubes(CNTs)/carbon nanofiber(CNF).The as-prepared FeCo@CoNx@FePx/C exhibited a half-wave potential as high as 0.86 V in oxygen reduction reaction(ORR)and low oxygen evolution reaction(OER)overpotential of 368 mV at 10 mA·cm^(−2),which are superior to Pt/C(0.83 V)and IrO_(2)(375 mV)*** assembled Zn-air battery(ZAB)showed a high energy efficiency(Edischarge/Echarge)of 65%at 20 mA·cm^(−2)and stabilized for 700 charge-discharge *** spectroscopic and microscopic characterizations evidenced that the outstanding bifunctionality of the electrocatalyst can be ascribed to three main reasons:First,FeCo nanoparticles are rich in MOH/MOOH active sites for OER,and FePx/CNTs constructed with CVD also modulate electronic structure to improve electron transfer;second,both MNx in carbon matrix and FePx/CNTs are highly active towards ORR;third,the CNTs/CNF are highly porous and graphitized,which promotes mass transport and improves electrical conductivity and stability of the *** work gives important implications on the design of bifunctional electrocatalysts.

关键词： carbon nanotubes(CNTs)/carbon nanofiber(CNF)-supported multi-active components oxygen reduction reaction oxygen evolution reaction zinc-air battery

Special Issue of Bio-inspired Material Chemistry

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Chemical Research in Chinese Universities 2023年第1期39卷 1-2页

作者： wu yuchen XIA Fan WANG Shutao Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190P.R.China State Key Laboratory of Biogeology and Environmental Geology Engineering Research Center of Nano-Geomaterials of Ministry of EducationFaculty of Material Science and ChemistryChina University of GeosciencesWuhan 430074.P.R.China

Bio-inspired smart materials are attracting more and more research interest because of their unique properties to pave the way to many real-world applications,eg.,biomimetic fins,actively moving polymers,neural memory... 详细信息

关键词： materials attracting moving

Pore scale numerical investigation of counter-current spontaneous imbibition in multi-scaled pore networks

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Petroleum 2023年第4期9卷 558-571页

作者： yuchen wu Xiukun Wang Chaofan Zhang Chenggang Xian China University of Petroleum(Beijing) Beijing102249China

The multi-scaled pore networks of shale or tight reservoirs are considerably different from the conventional sandstone *** hydraulic fracturing treatment,the spontaneous imbibition process plays an important role in the productivity of the horizontal *** the color-gradient model of Lattice Boltzmann Method(LBM)accelerated with parallel computing,we studied the countercurrent spontaneous imbibition process in two kinds of pore structures with different interlacing distributions of large and small *** effect of geometry configuration of pore arrays with different pore-scale and the capillary number Ca on the mechanism of counter-current spontaneous imbibition as well as the corresponding oil recovery factor are *** found that the wetting phase tends to invade the small pore array under small Ca in both types of geometry configurations of different pore arrays of four pore arrays *** wetting phase also tends to invade the pore array near the inlet for injecting the wetting phase no matter if it is a large pore array or small pore array except for the situation when the Ca is large to a certain *** this situation,the small pore arrays show resistance to the wetting phase,so the wetting phase doesn't invade the small pore near the inlet,but invades the large pore *** the geometry configurations of different pore arrays and Ca have a significant effect on the oil recovery *** work will help to solve the doubt about the selectivity of the multi-scaled pores of the wetting phase and the role of pores with different sizes in imbibition and oil draining in countercurrent spontaneous imbibition processes.

关键词： Countercurrent spontaneous imbibition Multi-scaled pore structures Selectivity of wetting phase to pore size Lattice Boltzmann method

Evaluation of the weakening behavior of gas on the coal strength and its quantitative influence on the coal deformation

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International Journal of Mining Science and Technology 2021年第3期31卷 451-462页

作者： Haijun Guo Kai Wang yuchen wu Hanlu Tang Jianguo wu Lianhe Guan Chenyang Chang Chao Xu Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources China University of Mining and Technology-BeijingBeijing 100083China School of Emergency Management and Safety Engineering China University of Mining and Technology-BeijingBeijing 100083China State Key Laboratory of Coal Resources and Safe Mining China University of Mining and Technology-BeijingBeijing 100083China Kailuan(Group)Co. Ltd.Tangshan 063018China

The coal strength and deformation properties are key factors affecting safe coal mining and highefficiency coalbed methane(CBM)*** this paper,reconstituted coal samples are chosen to investigate the weakening behavior of gas on coal strength,meanwhile,its effects on coal deformation are quantitatively *** results indicate that the weakening degree of gas on coal strength is closely related to the confining stress and gas *** with non-gas-saturated coals,the maximum weakening ratios of adsorbed gas to coal strength are 10.58%,18.12%,8.55%and 14.65%under the conditions of confining stress CS=3 MPa and gas pressure GP=1 MPa,CS=3 MPa and GP=2 MPa,CS=4 MPa and GP=1 MPa,and CS=4 MPa and GP=2 MPa,***,the maximum weakening ratios of free gas to coal strength are 18.27%,36.54%,14.79%and 29.58%,respectively,under above four *** maximum coal bulk strain decreases as particle sizes of coal powders increase,and it has a maximum value of 0.0227 and a minimum value of 0.0191 in particle size ranges of 0.01–0.041 and 0.5–1 *** the same conditions,the coal bulk strain increases with increasing gas pressure,revealing that coal deformation properties can be enhanced by gas.

关键词： Gas-saturated coal Coal strength Weakening effect Coal deformation Quantitative evaluation Mechanical loading

Chlorine-substituted chiral 2D perovskite microwires with enhanced lattice rigidity for sensitive circularly polarized light detection

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Science China Chemistry 2023年第12期66卷 3602-3610页

作者： Meng Yuan yuchen Qiu Yingjie Zhao Yuyan Zhao Hui Li Xiao Wei Gaosong Chen Jiangang Feng Hanfei Gao Jinjin Zhao Jiahui Zhao Lei Jiang yuchen wu Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China College of Chemistry Zhengzhou UniversityZhengzhou 450001China College of Chemistry Jilin UniversityChangchun 130012China Key Laboratory for Special Functional Materials of Ministry of Education National and Local Joint Engineering Research Center for High-Efficiency Display and Lighting TechnologyCollaborative Innovation Center of Nano Functional Materials and ApplicationsHenan UniversityKaifeng 475004China University of Chinese Academy of Sciences(UCAS) Beijing 100049China Department of Electrical and Computer Engineering National University of SingaporeSingapore 117585Singapore Suzhou Institute for Advanced Research University of Science and Technology of ChinaSuzhou 215123China Ji Hua Laboratory Foshan 528000China Department of Physics Shanxi Datong UniversityDatong 037009China

Chiral two-dimensional(2D) perovskites offer numerous attractive features for optoelectronics owing to their soft, deformable lattices and a high degree of chemical tunability. While tremendous advances have been made in perovskite-based direct circularly polarized light(CPL) detection, the low circular polarization anisotropy factor and sensitivity of those photodetectors arising from large lattice distortion still limit practical applications. Herein, chiral 2D perovskite-based single-crystalline microwire arrays with enhanced circular dichroism(CD) absorption are fabricated with the synergy of the capillary-bridgeconfined assembly method and chlorine-substituted phenethylamine(Cl-MBA). Compared with phenethylamine(MBA)-inserted perovskites, the smaller lattice distortion and increased halogen–halogen interaction within Cl–MBA-inserted perovskites strengthen lattice rigidity and weaken electron–phonon coupling to improve carrier transport and thermal stability, resulting in high-performance CPL photodetectors with an anisotropy factor of 0.25, responsivity exceeding 95.7±9.3 A W^(-1)and detectivity exceeding(3.05±0.30)×10^(13)Jones. This work opens a new perspective to modulate circular polarization sensitivity and will be helpful to realize promising implementations in quantum computation and communication.

关键词： chiral perovskites microwire arrays lattice rigidity circular polarization photodetectors

Impact of lithium nitrate additives on the solid electrolyte interphase in lithium metal batteries

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Chinese Journal of Structural Chemistry 2024年第2期43卷 17-23页

作者： Mengwen Wang Qintao Sun Yue Liu Zhengan Yan Qiyu Xu yuchen wu Tao Cheng Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory of Advanced Negative Carbon TechnologiesSoochow UniversitySuzhou215123JiangsuPR China

Lithium metal batteries(LMBs)represent a promising frontier in energy storage technology,offering high energy density but facing significant *** this work,we address the critical challenge of lithium dendrite for-mation in LMBs,a key barrier to their efficiency and *** on the potential of electrolyte additives,specifically lithium nitrate,to inhibit dendritic growth,we employ advanced multi-scale simulation techniques to explore the formation and properties of the solid electrolyte interphase(SEI)on the anode *** study introduces a novel hybrid simulation methodology,HAIR(Hybrid ab initio and Reactive force field Molecular Dynamics),which combines ab initio molecular dynamics(AIMD)and reactive force field molecular dynamics(RMD).This approach allows for a more precise and reliable examination of the interaction mechanisms of nitrate additives within *** findings demonstrate that lithium nitrate contributes to the formation of a stable and fast ionic conductor interface,effectively suppressing dendrite *** insights not only advance our un-derstanding of dendrite formation and mitigation strategies in lithium metal batteries,but also highlight the efficacy of HAIR as a pioneering tool for simulating complex chemical interactions in battery materials,offering significant implications for the broader field of energy storage technology.

关键词： Lithium metal batteries Dendrite suppression Solid electrolyte interphase Hybrid ab initio Reactive force field molecular dynamics Electrolyte additives

Large-area periodic lead halide perovskite nanostructures for lenticular printing laser displays

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Science China Chemistry 2021年第4期64卷 629-635页

作者： Min Wang Haohao Li Chenghu Dai Ji Tang Baipeng Yin Hong Wang Jingwen Li yuchen wu Chuang Zhang Yong Sheng Zhao Key Laboratory of Photochemistry Beijing National Laboratory for Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Lenticular printing technique provides a promising way to realize stereoscopic displays,especially,when microscopic optical structures are integrated into light-emitting materials/***,we fabricated large-area periodic structures with a spatial resolution at a wavelength scale from hybrid perovskite materials via a space-confined solution growth *** takes advantages of both high refractive index contrast and high luminescence brightness,which allows the optical modulation on not only the reflection of illumination,but also the light emission from hybrid *** distributed feedback within these periodic structures significantly improves the degree of polarization and directionality of laser actions while their threshold is also *** findings enable us to present a prototype of lenticular printing laser displays that vary emission colors at different view angles,which may find applications in creating high-resolution and high-contrast holographical images.

关键词： lead halide perovskite optical grating structure optically pumped laser lenticular printing laser display

Role of pyroptosis in inflammation and cancer

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Cellular & Molecular Immunology 2022年第9期19卷 971-992页

作者： Xiang Wei Feng Xie Xiaoxue Zhou yuchen wu Haiyan Yan Ting Liu Jun Huang Fangwei Wang Fangfang Zhou Long Zhang International Biomed-X Research Center Second Affiliated Hospital of Zhejiang University School of MedicineZhejiang UniversityHangzhouZhejiang310058PR China Institutes of Biology and Medical Science Soochow UniversitySuzhou215123PR China MOE Key Laboratory of Biosystems Homeostasis&Protection and Innovation Center for Cell Signaling Network Life Sciences InstituteZhejiang UniversityHangzhouZhejiang310058PR China Department of Clinical Medicine The First School of MedicineWenzhou Medical UniversityWenzhouZhejiang325035PR China School of Medicine Zhejiang University City CollegeHangzhouZhejiang310015PR China Department of Cell Biology and Department of General Surgery of Sir Run Run Shaw Hospital Zhejiang University School of MedicineHangzhou310058ZhejiangPR China Zhejiang Provincial Key Lab of Geriatrics and Geriatrics Institute of Zhejiang Province Department of GeriatricsZhejiang HospitalHangzhouZhejiang310030PR China Zhejiang Provincial Key Laboratory of Cancer Molecular Cell Biology Life Sciences InstituteZhejiang UniversityHangzhouZhejiang310058PR China

Pyroptosis is a form of programmed cell death mediated by gasdermin and is a product of continuous cell expansion until the cytomembrane ruptures,resulting in the release of cellular contents that can activate strong inflammatory and immune ***,an innate immune response,can be triggered by the activation of inflammasomes by various influencing *** of these inflammasomes can induce the maturation of caspase-1 or caspase-4/5/11,both of which cleave gasdermin D to release its N-terminal domain,which can bind membrane lipids and perforate the cell ***,we review the latest advancements in research on the mechanisms of pyroptosis,newly discovered influencing factors,antitumoral properties,and applications in various ***,this review also provides updates on potential targeted therapies for inflammation and cancers,methods for clinical prevention,and finally challenges and future directions in the field.

关键词： Pyroptosis inflammasome influencing factors pyroptosis-associated diseases antitumor targeted therapy

Organic Memristor Based on High Planar Cyanostilbene/Polymer Composite Films

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Chemical Research in Chinese Universities 2023年第1期39卷 121-126页

作者： ZHAO Jinjin LI Wei WANG Xuechen WEI Xiao ZHU Huiwen QU Wenshan MEN Dandan GAO Zhixiang WEI Bin GAO Hanfei wu yuchen Department of Physics Shanxi Datong UniversityDatong037009P.R.China Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing100190P.R.China Ji Hua Laboratory Foshan528000P.R.China Shanxi Province Key Laboratory of Microstructure Electromagnetic Functional Materials Institute of Solid State PhysicsShanxi Datong UniversityDatong037009P.R.China School of Chemistry and Chemical Engineering Shanxi Datong UniversityDatong037009P.R.China Key Laboratory of Advanced Display and System Applications Ministry of EducationSchool of Mechatronic Engineering and AutomationShanghai UniversityShanghai200072P.R.China

Organic memristors with low power consumption,fast write/erasure speed,and complementary metal-oxide-semiconductor(CMOS)compatibility have attracted tremendous attention to mimic biological synapses to realize neuromorphic computation in recent *** this paper,organic resistive switching memory(ORSM)based on(Z)-3-(naphthalen-2-yl)-2-(4-nitrophenyl)acrylonitrile(NNA)and polymer poly(N-vinylcarbazole)(PVK)composite film was prepared by spin-coating *** performance based on NNA:PVK composite films with different mass fractions of NNA were systematically *** ORSM based on PVK:40%(mass fraction)NNA composite film exhibited non-volatile and bipolar memory properties with a switching ratio(Ion/Ioff)of 24.1,endurance of 68 times and retention time of 104 s,a“SET”voltage(Vset)of−0.55 V and a“RESET”voltage(Vreset)of 2.35 *** resistive switching was ascribed to the filling and vacant process of the charge traps induced by NNA and the inherent traps in PVK *** holes trapping and de-trapping process occurred when the device was applied with a negative or positive bias,which caused the transforming of the conductive way of charges,that is the resistive behaviors in the *** study provides a promising platform for the fabrication of ORSM with high performance.

关键词： Organic memristor Resistive switching Polymer/molecule composite film

Optical and electrical modulation in ultraviolet photodetectors based on organic one-dimensional photochromic arrays

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SmartMat 2021年第3期2卷 388-397页

作者： Yue Geng Yingjie Zhao Jinjin Zhao Yu Zhai Meng Yuan Xue-Dong Wang Hanfei Gao Jiangang Feng yuchen wu Lei Jiang Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences(UCAS) BeijingChina Institute of Theoretical Chemistry College of ChemistryJilin UniversityChangchunJilinChina Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhouJiangsuChina Ji Hua Laboratory FoshanGuangdongChina Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingaporeSingapore

Organic photochromic materials have drawn considerable attention for their potential applications in large-scale and low-cost optoelectronics owing to unique tunable physicochemical *** organic photodetectors,photochromic materials have realized optical and electrical engineering of semiconductor layers,which incorporate not only tunable performance,but also functionalities to optoelectronic ***,the essential challenge is to assemble large-area photochromic micro-and nanostructure arrays with controllable geometry and precise alignment,which restricts the integration of multifunctional optoelectronic ***,we fabricate organic photochromic one-dimensional(1D)arrays via a feasible solution process through the confined crystallization of organic *** modulating and controlling the photoisomerization behaviors,these 1D photochromic arrays possess broad spectral tunability,which ensure tunable ***,we investigate the crystallographic transition and electronic performance variation of these 1D photochromic *** adjusting the dwell time of ultraviolet(UV)irradiation,the UV photochromic photodetectors realize tunable and repeatable responsivity from 85.6 to 0.709 mA/*** work provides new possibilities for optical and electrical engineering of photochromic microwires towards the integration of multifunctional optoelectronic devices.

关键词： crystalline transition organic 1D arrays photochromic molecules ultraviolet photodetectors