检索结果-南通市图书馆

Construction of 2D/2D Ti_(3)C_(2)T_(x)MXene/CdS heterojunction with photothermal effect for efficient photocataly.ic hy.rogen production

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2024年第4期171卷 1-9页

作者： T.y.Huang Z.y.ng S.y.y.ng Z.H.dai y.J.Liu J.H.Liao G.y.Zhong Z.J.Xie y.P.Fang S.S.Zhang k.y.Laboratory.for Biobased Materials and Energy.of Ministry.of Education Guangdong Laboratory for Lingnan Modern AgricultureCollege of Materials and EnergySouth China Agricultural UniversityGuangzhou 510643China School of Phy.ics and Optoelectronics South China University of TechnologyGuangzhou 510640China School of Chemical Engineering and Energy.Technology Guangdong Provincial Key Laboratory of Distributed Energy SystemsDongguan University of TechnologyDongguan 523808China

The insensitivity.of semiconductors to visible and infrared light is a k.y.constraint on the utilization of light energy.in photocataly.ic *** photocataly.ts with full-spectrum absorption through surface engineering is an effective approach to fully.harnessing light energy.in semiconductor ***,a novel stable Ti_(3)C_(2)T_(x)MXene/CdS heterojunction cataly.t is obtained by.in-situ epitaxial growth of two-dimensional(2D)CdS nanosheets on 2D MXene interface via a solvothermal *** exceptional light absorption properties of MXene confer outstanding full-spectrum driven photocat-aly.ic hy.rogen evolution capability.upon the heterogeneous *** unique 2D/2D structure effectively.mitigated the recombination of photogenerated carriers,enhancing the photocataly.ic performance of the ***,the composite cataly.t exhibits a significantly.higher surface temperature of 80.4℃under visible light irradiation at an intensity.of 0.1 W/cm^(2),which is 1.84 times higher than that of *** irradiation of visible and near infrared light,the composite cataly.t with photothermal ef-fect demonstrates a remark.ble hy.rogen evolution rate of 65.4 mmol g^(-1)h^(-1),which is 7.2 times higher than that of CdS *** study.introduces a novel approach for constructing full-spectrum absorption cataly.ts and expands the application of the photothermal effect in photocataly.ic hy.rogen evolution research.

关键词： Two-dimensional structure Heterostructure Photothermal effect Photocataly.t Hy.rogen evolution

Supposition of graphene stack. to estimate the contact resistance and conductivity.of nanocomposites

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2024年第4期45卷 663-676页

作者： y.ZARE M.T.MUNIR G.J.WENG k.y.RHEE Biomaterials and Tissue Engineering Research Group Department of Interdisciplinary TechnologiesBreast Cancer Research CenterMotamed Cancer InstituteTehran ***Iran College of Engineering and Technology American University of the Middle EastEgaila 54200Kuwait Department of Mechanical and Aerospace Engineering Rutgers UniversityNew BrunswickNJ 08903U.S.A. Department of Mechanical Engineering(Bk.1 Four) College of EngineeringKyung Hee UniversityYongin 446701Republic of Korea

In this study.the effects of stack.d nanosheets and the surrounding interphase zone on the resistance of the contact region between nanosheets and the tunneling conductivity.of samples are evaluated with developed equations superior to those previously.*** contact resistance and nanocomposite conductivity.are modeled by.several influencing factors,including stack.properties,interphase depth,tunneling size,and contact *** developed model's accuracy.is verified through numerous experimental *** further validate the models and establish correlations between parameters,the effects of all the variables on contact resistance and nanocomposite conductivity.are ***,the contact resistance is primarily.dependent on the poly.er tunnel resistivity.contact area,and tunneling *** dimensions of the graphene nanosheets significantly.influence the conductivity.which ranges from 0 S/m to90 S/*** increased number of nanosheets in stack. and a larger gap between them enhance the nanocomposite's ***,the thick.r interphase and smaller tunneling size can lead to higher sample conductivity.due to their optimistic effects on the percolation threshold and network.efficacy.

关键词： graphene poly.er composite stack.d nanosheet tunneling conductivity contact resistance interphase

Tomographic reconstruction of the Earth’s magnetosheath from multiple spacecraft:a theoretical study

在线全文

学校读者我要写书评

暂无评论

Earth and Planetary.Phy.ics 2024年第1期8卷 204-214页

作者： A.M.Jorgensen TianRan Sun y.Huang L.Li R.Xu L.dai Chi Wang New Mexico Institute of Mining and Technology SocorroNMUSA National Space Science Center Chinese Academy of SciencesBeijing 100190China Tsinghua University Beijing 100084China

Following our earlier work.on tomographic reconstruction of the magnetosheath soft X-ray.emissions with superposed epoch analy.is of many.images recorded from a single spacecraft we now explore the instantaneous reconstruction of the magnetosheath and magnetopause using a few images recorded simultaneously.from a few *** work.is motivated by.the prospect of possibly.having two or three soft X-ray.imagers in space in the coming y.ars,and that many.phenomena which occur at the magnetopause boundary.such as reconnection events and pressure pulse responses,do not lend themselves as well to superposed epoch *** the reconstruction is successful-which we demonstrate in this paper that it can be-this collection of imagers can be used to reconstruct the magnetosheath and magnetopause from a single image from each spacecraft,allowing for high time resolution *** this paper we explore the reconstruction using,two,three,and four *** show that the location of the subsolar point of the magnetopause can be determined with just two satellites,and that volume emissions of soft X-ray.,and the shape of the boundary.can be reconstructed using three or more satellites.

关键词： magnetosheath tomography soft X-ray.imaging SMILE

Rational design of AgGaS/ZnS/ZnS quantum dots with a near-unity.photoluminescence quantum y.eld via double shelling scheme

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2024年第2期169卷 235-242页

作者： H.X.Lu H.Liu Z.Z.Fu y.y.Chen H.Q.dai Z.Hu W.L.Zhang R.Q.Guo Institute for Electric Light Sources School of Information Science and TechnologyFudan UniversityShanghai 200433China Institute of Future Lighting Academy for Engineering and TechnologyFudan UniversityShanghai 200433China y.wu Research Institute of Fudan University YiwuZhejiang 322000China Zhongshan-Fudan Joint Innovation Center Zhongshan 528437China

In this study.a two-step method was used to sy.thesize highly.luminescent AgGaS/ZnS/ZnS quantum dots(QDs).In the first step,an inner ZnS shell was formed via a one-pot method,which resulted in a smaller lattice mismatch between the AgGaS core and the outer ZnS shell,thereby.facilitating the formation of a thick.outer *** the two-step shelling process,the sy.thesized AgGaS/ZnS/ZnS QDs showed an excellent photoluminescence quantum y.eld(PLQy.of 96.4%with a peak.wavelength of 508 nm,repre-senting the highest PLQy.reported thus far for AgGaS ***,the effect of halogen ions in Zn precursors on the shelling process was *** was proposed that the capacity.of halogen ions to coordinate with the QDs influenced the balance between Zn cation diffusion and ZnS shelling ***,the ZnS shelling reaction was dominant when ZnCl_(2)was employ.d,while Zn cation diffusion was the dominant process under the I^(−)-rich *** work.provides insights into the interfacial restructuring during the ZnS shelling and offers a clear map for the tailored sy.thesis of core/shell QDs.

关键词： AgGaS Quantum dots Photoluminescence Core/shell Alloy.d core/shell interface

Towards an ultrafast 3D imaging scanning LiDAR sy.tem:a review

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonics Research 2024年第8期12卷 1709-1729页

作者： ZHI LI y.QI HAN LICAN WU ZIHAN ZANG MAOLIN dai SZE y.N SET SHINJI y.MASHITA QIAN LI H.y.FU Tsinghua Shenzhen International Graduate School Tsinghua UniversityShenzhen 518055China Department of Electrical Engineering and Information Sy.tems The University of TokyoTokyo 113-8656Japan Research Center for Advanced Science and Technology The University of TokyoTokyo 153-8904Japan School of Electronic and Computer Engineering Peking UniversityShenzhen 518055China

Light detection and ranging(LiDAR),as a hot imaging technology.in both industry.and academia,has undergone rapid innovation and *** current mainstream direction is towards sy.tem miniaturization and *** are many.metrics that can be used to evaluate the performance of a LiDAR sy.tem,such as lateral resolution,ranging accuracy.stability.size,and *** recently.with the continuous enrichment of LiDAR application scenarios,the pursuit of imaging speed has attracted tremendous research ***,for autonomous vehicles running on motorway. or industrial automation applications,the imaging speed of LiDAR sy.tems is a critical *** this review,we will focus on discussing the upper speed limit of the LiDAR *** on the work.ng mechanism,the limitation of optical parts on the maximum imaging speed is *** beam scanner has the greatest impact on imaging *** provide the work.ng principle of current popular beam scanners used in LiDAR sy.tems and summarize the main constraints on the scanning ***,we highlight the spectral scanning LiDAR as a new paradigm of ultrafast ***,to further improve the imaging speed,we then review the parallel detection methods,which include multiple-detector schemes and multiplexing ***,we summarize the LiDAR sy.tems with the fastest point acquisition rate reported *** the outlook.we address the current technical challenges for ultrafast LiDAR sy.tems from different aspects and give a brief analy.is of the feasibility.of different approaches.

关键词： LiDAR scanner sy.tem

How plants sense and respond to osmotic stress

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2024年第3期66卷 394-423页

作者： Bo y. dai-y.n Chao y.ng Zhao Shanghai Center for Plant Stress Biology CAS Center for Excellence in Molecular Plant SciencesThe Chinese Academy of SciencesShanghai 200032China k.y.Laboratory.of Plant Carbon Capture The Chinese Academy of SciencesShanghai 200032China National k.y.Laboratory.of Plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and EcologyThe Chinese Academy of SciencesShanghai 200032China University.of Chinese Academy.of Sciences Beijing 100049China

Drought is one of the most serious abiotic stresses to land *** sense and respond to drought stress to survive under water *** have studied how plants sense drought stress,or osmotic stress caused by.drought,ever since Charles Darwin,and gradually.obtained clues about osmotic stress sensing and signaling in *** stress is a phy.ical stimulus that triggers many.phy.iological changes at the cellular level,including changes in turgor,cell wall stiffness and integrity.membrane tension,and cell fluid volume,and plants may.sense some of these stimuli and trigger downstream *** this review,we emphasized water potential and movements in organisms,compared putative signal inputs in cell wall-containing and cell wall-free organisms,prospected how plants sense changes in turgor,membrane tension,and cell fluid volume under osmotic stress according to advances in plants,animals,y.asts,and bacteria,summarized multilevel biochemical and phy.iological signal outputs,such as plasma membrane nanodomain formation,membrane water permeability.root hy.rotropism,root halotropism,Casparian strip and suberin lamellae,and finally.proposed a hy.othesis that osmotic stress responses are lik.ly.to be a cock.ail of signaling mediated by.multiple *** also discussed the core scientific questions,provided perspective about the future directions in this field,and highlighted the importance of robust and smart root sy.tems and efficient source-sink.allocations for generating future high-y.eld stress-resistant crops and plants.

关键词： cell volume drought membrane tension osmotic stress turgor

Hard y.t tough and self-lubricating(CuNiTiNbCr)C_(x) high-entropy.nanocomposite films:Effects of carbon content on structure and properties

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2024年第6期173卷 20-30页

作者： y.T.Li X.M.Chen X.k.Zeng M.Liu X.Jiang y.X.Leng k.y.Laboratory.of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China k.y.Laboratory.of Noise and Vibration Research Institute of AcousticsChinese Academy of SciencesBeijing 100190China State k.y.Laboratory.of Acoustics Institute of AcousticsChinese Academy of SciencesBeijing 100190China School of Mechanical and Electrical Engineering Mianyang Teachers’CollegeMianyang 621000China

The single-phase high-entropy.alloy.film is difficult to meet severe friction conditions due to its low hardness and high friction ***-composite structure film is composed of at least two separated phases,showing the properties of strength and toughness integration and excellent wear *** design of nanocomposite structures can effectively.improve the mechanical properties and tribological properties of high-entropy.alloy.*** this study.the(CuNiTiNbCr)C_(x) nanocomposite high-entropy.films(HEFs)integrated with high hardness,high toughness,and self-lubrication were sy.thesized by.the double-target co-sputtering *** effect of carbon content on microstructure,mechanical properties,and tribological properties of(CuNiTiNbCr)C_(x) films was *** the increase of carbon content in the HEFs,the carbon atoms preferentially.react with Ti,Nb,and Cr to form a(TiNbCr)C ceramic-reinforced phase,and then the excess carbon atoms precipitate in the form of amorphous carbon(a-C)lubricating phase in the *** structure of the HEFs changes from an amorphous structure to a nanocomposite structure of amorphous(amorphous CuNiTiNbCr phase+a-C phase)/nanocry.talline(TiN-bCr)C *** the carbon content is about 21.2 at.%,the carbide phase in the film reaches saturation and the hardness and modulus of the films are highest,which are 18 GPa and 228 GPa,*** HEFs with a carbon content of 44.0 at.%show the best toughness and tribological properties with a friction coefficient of 0.16 and a wear rate of 2.4×10^(-6) mm^(3)/(N m),which is mainly.attributed to the excellent resistance to fatigue crack.growth and the interfacial lubricating lay.r formed in the friction *** nanocomposite(CuNiTiNbCr)C_(x) HEFs show very.promising application prospect in the field of friction protection.

关键词： High-entropy.films Nanocomposite Double-target co-sputtering Strengthening-toughening Tribological properties

Evidence of guide field magnetic reconnection in flapping current sheets

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Earth and Planetary.Phy.ics 2024年第4期8卷 650-658页

作者： y.nTian Hou SuPing Duan Lei dai Chi Wang State k.y.Laboratory.of Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China k.y.Laboratory.of Solar Activity.and Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China College of Earth and Planetary.Sciences University of Chinese Academy of SciencesBeijing 100049China

Based on current sheet flapping motion on 27 August 2018 in the dusk.flank.magnetotail,as recorded by.instruments aboard Magnetospheric Multiscale(MMS)spacecraft,we present the first study.of guide field reconnection observed in the flux rope embedded in k.nk.lik. flapping current sheets near the dusk.side flank.of the *** more common magnetotail reconnections,which are sy.metric,these asy.metric small-scale(λ_(i)~650 k.)reconnections were found in the highly.twisted current sheet when the direction normal to the sheet changes from the Z direction into the y.*** unique feature of this unusual reconnection is that the reconnection jets are along the Z direction-different from outflow in the X direction,which is the more usual *** vertical reconnection jet is parallel or antiparallel to the up-and-down motion of the tail’s current *** normalized reconnection rate R is estimated to be~*** results indicate that such asy.metric reconnections can significantly.enlarge current sheet flapping,with large oscillation *** letter presents direct evidence of guide field reconnection in a highly.twisted current sheet,characterized by.enlarged current sheet flapping as a consequence of the reconnection outflow.

关键词： magnetic reconnection magnetotail current sheet

Stability.analy.is of a liquid cry.tal elastomer self-oscillator under a linear temperature field

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2024年第2期45卷 337-354页

作者： Haiy.ng WU Jiangfeng LOU Biao ZHANG y.ntong dai k.i LI School of Civil Engineering Anhui Jianzhu UniversityHefei 230601China

Self-oscillating sy.tems abound in the natural world and offer substantial potential for applications in controllers,micro-motors,medical equipments,and so ***,numerical methods have been widely.utilized for obtaining the characteristics of self-oscillation including amplitude and ***,numerical methods are burdened by.intricate computations and limited precision,hindering comprehensive investigations into self-oscillating *** this paper,the stability.of a liquid cry.tal elastomer fiber self-oscillating sy.tem under a linear temperature field is studied,and analy.ical solutions for the amplitude and frequency.are ***,we establish the governing equations of self-oscillation,elucidate two motion regimes,and reveal the underly.ng ***,we conduct a stability.analy.is and employ.a multi-scale method to obtain the analy.ical solutions for the amplitude and *** results show agreement between the multi-scale and numerical *** research contributes to the examination of diverse self-oscillating sy.tems and advances the theoretical analy.is of self-oscillating sy.tems rooted in active materials.

关键词： self-oscillation stability.analy.is multi-scale method liquid cry.tal elastomer linear temperature field