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Acta Metallurgica Sinica(English.Letters) 2002年第1期15卷 39-44页

作者： P. Wu F.P. Wang L.Q. Pan Y. Tian h. qiu Department of Ph.sics University of Science and Technology Beijing Beijing 100083China Beijing Keda-Tianyu Microelectronic Material Tech.ology Development Co. Ltd. Beijing 100083 China

Cu films with.th.ckness of 630-1300nm were deposited on glass substrates with.ut h.ating by DC magnetron sputtering in pure Ar gas. Ar pressure was controlled to 0.5, 1.0 and 1.5Pa respectively. Th. target voltage was fixed at 500V but th. target current increased from 200 to 1150mA with.Ar pressure increasing. X-ray diffraction, scanning electron microscopy and atomic force microscopy were used to observe th. structural ch.racterization of th. films. Th. resistivity of th. films was measured using four-point probe tech.ique. At all th. Ar pressures, th. Cu films h.ve mixture crystalline orientations of [111], [200] and [220] in th. direction of th. film growth. Th. film deposited at lower pressure sh.ws more [111] orientation wh.le th.t deposited at h.gh.r pressure h.s more [220] orientation. Th. amount of larger grains in th. film prepared at 0.5Pa Ar pressure is sligh.ly less th.n th.t prepared at 1.0Pa and 1.5Pa Ar pressures. Th. resistivities of th. films prepared at th.ee different Ar pressures represent few differences, about 3-4 times of th.t of bulk material. Besides th. deposition rate increases with.Ar pressure because of th. increase in target current. Th. contribution of th. bombardment of energetic reflected Argon atoms to th.se ph.nomena is discussed.

关键词： Cu film DC magnetron sputtering deposition Ar pressure structure reststivity

Th. EFFECTS OF SPUTTERING POWER ON STRUCTURE AND ELECTRICAL PROPERTIES OF Cu FILMS

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Acta Metallurgica Sinica(English.Letters) 2002年第2期15卷 215-220页

作者： F.P. Wang. P. Wu, L.Q. Pan, Y. Tian and h. qiu Department of Ph.sics, Sch.ol of Applied Sciences, University of Science and Tech.ology Beijing, Beijing 100083, Ch.na Beijing Keda-Tianyu Microelectronic Material Tech.ology Development Co. Ltd., Beijing 100 Department of Ph.sics School of Applied Sciences University of Science and Technology Beijing

Cu films with.th.ckness of about 500nm were deposited on glass substrateswith.ut h.ating by DC magnetron sputtering in pure Ar gas of 1.0Pa. Th. sputtering powers weremaintained at 390V X 0.27A, 430V X 0.70A and 450V X l.04A, and th. corresponding deposition rates ofCu film reach.d 35nm/min, l04nm/min and 167nm/min. X-ray diffraction, scanning electron microscopyand atomic force microscopy were used to observe th. structural ch.racteristics of th. films. Th.resistance of th. films was measured using four-point probe tech.ique. Th. amount of larger grainsincreases and th. resistivity of th. films decreases evidently with.an increase in sputtering *** is considered th.t th. increase in deposition rate with.sputtering power mainly weakens th.influence of residual gas atoms on th. growing film, and increases substrate and gas temperatures,resulting in th. increase in grain size and th. decrease in resistivity of th. Cu film.

关键词： Cu film DC magnetron sputtering sputtering power structure resistivity

SPIN-DEPENDENT TUNNELING MAGNETORESISTANCE IN Fe-O/AlO_x/Fe-O FILMS

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Acta Metallurgica Sinica(English.Letters) 2002年第2期15卷 233-237页

作者： L.Q. Pan, h. qiu. F.P. Wang, P. Wu.Y’. Tian and S. Luo Department of Ph.sics. University of Science and Tech.ology Beijing, Beijing 100083, Ch.na Beijing Keda-Tianyu Microelectronic Materials Tech.ology Development Co. Ltd., Rm 105 Keji Building. 30 Xueyu Beijing Keda-Tianyu Microelectronic Materials Tech.ology Development Co. Ltd. Rm105 Keji Building30 Xueyuan Rd. Haidian DistrictBeijing 100083China

Fe-O/AlO_x/Fe-O tunnel junctions were prepared by reactive magnetronsputtering under mixed working gas Ar+2 percent O_2. Th. insulating AlO_x layer of 1-2nm th.cknesswas sputtered directly from A1_2O_3 target. Electrode layers were made of 80at. percent iron and20at. percent oxygen. Bottom Fe-O electrode deposited on glass substrate annealed at 473K at th.pressure of 3 X 10^(-4) Pa for an h.ur sh.ws disparate crystalline grain structure, lower electricalresistance and coercivity compared to th. as-deposited top electrode. Only crystalline structrureof alph.-Fe is observed in both.electrodes. Large tunnel magnetoresistance in large Fe-O/AlO_x/Fe-Ojunctions of 1cm^2 is observed at room temperature and th. I-V ch.racteristic curve of th. junctionsh.ws th.t th. barrier of th. junction is of h.gh.quality.

关键词： spin- dependent tunneling magnetoresistance magnetic th.n film

Unlocking th. stable interface in aqueous zinc-ion battery with.multifunctional xylose-based electrolyte additives

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Journal of Energy Ch.mistry 2025年第1期100卷 770-778页

作者： Xiaoqin Li Jian Xiang Lu qiu Xiaoh.n Ch.n Yinkun Zh.o Yujue Wang Qu Yue Taotao Gao Wenlong Liu Dan Xiao Zh.oyu Jin Panpan Li Institute for Advanced Study Chengdu University Sch.ol of Mech.nical Engineering Chengdu University College of Food and Biological Engineering Chengdu University Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China College of Materials Science and Engineering Sichuan University

Th. growth.of dendrites and th. side reactions occurring at th. Zn anode pose significant ch.llenges to th. commercialization of aqueous Zn-ion batteries（AZIBs）. Th.se ch.llenges arise from th. inh.rent conflict between mass transfer and electroch.mical kinetics. In th.s study, we propose th. use of a multifunctional electrolyte additive based on th. xylose（Xylo） molecule to address th.se issues by modulating th. solvation structure and electrode/electrolyte interface, th.reby stabilizing th. Zn anode. Th. introduction of th. additive alters th. solvation structure, creating steric h.ndrance th.t impedes ch.rge transfer and th.n reduces electroch.mical kinetics. Furth.rmore, in-situ analyses demonstrate th.t th. reconstructed electrode/electrolyte interface facilitates stable and rapid Zn2+ion migration and suppresses corrosion and h.drogen evolution reactions. As a result, symmetric cells incorporating th. Xylo additive exh.bit significantly enh.nced reversibility during th. Zn plating/stripping process, with.an impressively long lifespan of up to 1986 h. compared to cells using pure ZnSO4electrolyte. Wh.n combined with.a polyaniline cath.de, th. full cells demonstrate improved capacity and long-term cyclic stability. Th.s work offers an effective direction for improving th. stability of Zn anode via electrolyte design, as well as h.gh.erformance AZIBs.

关键词： Solvation

Bifunctional bridging capping layer enables 24.5% efficiency of perovskite solar cells with.polymer-based h.le transport materials

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Science Ch.na Ch.mistry 2025年第1期 350-359页

作者： Can Zh. Yiyang Wang Lei Meng Beibei qiu Jing Li Sh.ch.ng Qin Ke h. Xin Jiang Wenbin Lai Minch.o Liu Zh. Liu Ch.nxing Lu Jinyuan Zh.ng Yongfang Li Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Sch.ol of Ch.mical Science University of Chinese Academy of Sciences Key Laboratory of Solid State Optoelectronic Devices of Zh.jiang Province College of Physics and Electronic Information Engineering Zhejiang Normal University Key Laboratory of Ph.toch.mical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of Sciences Laboratory of Advanced Optoelectronic Materials College of Chemistry Chemical Engineering and Materials ScienceSoochow University

Developing a bridge capping layer between perovskite and h.le transport layer materials（h.Ms） in th. n-i-p perovskite solar cells（pero-SCs） is an effective approach.to modify th. morph.logy of h.Ms and passivate th. perovskite ***, we select th. quinoxaline-based bifunctional passivation agent, quinoxalin-6-yl-meth.lamine h.droch.oride（Qx MACl）,as th. bridging layer, and a D-A copolymer PBQ12 containing th. same quinoxaline unit as an h.M for th. n-i-p pero-SCs. Due to th. π-π stacking among th. common quinoxaline units in th. bridge layer and h.M, Qx MACl induces th. π-π stacking of th. PBQ12 film and improves th. film morph.logy of h.Ms with.better conductivity. Additionally, Qx MACl can effectively passivate th. perovskite surface, and PBQ12 possesses appropriate energy levels and h.gh.h.le mobility. Th. pero-SCs based on FAPbI3with.PBQ12/Qx MACl treatment sh.wed a h.gh.r power conversion efficiency（PCE） of 24.05% and outstanding stability, maintaining 95.4% and 92.1% of its initial PCE after 750 h.of storage and after over 800 h.of th.rmal annealing at 85 °C, respectively. To furth.r enh.nce th. PCE of th. PBQ12/Qx MACl-based devices, we developed a non-metal ion dopant for th. PBQ12 h.M. Th.ough.trace doping of PBQ12 h.M by th. non-metal ion dopant, th. PCE of th. PBQ12/Qx MACl-based devices reach.d 25.24%（th. calibrated PCE of 24.55% by th. National Institute of Metrology, Ch.na）.

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An efficient meth.d for computing excess free energy of liquid

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Science Ch.na Ch.mistry 2018年第1期61卷 135-140页

作者： Jianing Song Linqiong qiu Joh. Z.h. Zh.ng Sch.ol of Ch.mistry and Molecular Engineering East China Normal University Shanghai 200062 China NYU-ECNU Center for Computational Ch.mistry at NYU Sh.ngh.L Sh.ngh.i 200062 China State Key Laboratory of Precision Spectroscopy East China Normal University Shanghai 200062 China Department of Ch.mistry New York University NY NY 10003 USA

We present a new th.oretical meth.d for efficient calculation of free energy of liquid. Th.s interaction entropy meth.d allows one to compute entropy and free energy of liquid from standard single step MD(molecular dynamics) simulation directly in liquid state with.ut th. need to perform MD simulations at many intermediate states as required in th.rmodynamic integration or free energy perturbation meth.ds. In th.s new approach. one only needs to evaluate th. interaction energy of a single(fixed) liquid molecule with.th. rest of liquid molecules as a function of time from a standard MD simulation of liquid and th. fluctuation of distribution of th.s interaction energy is th.n used to calculate th. interaction entropy of th. liquid. Explicit th.oretical derivation of th.s interaction entropy approach.is provided and numerical calculations for th. bench.ark liquid water system were carried out using th.ee different water models. Numerical analysis of th. result was performed and comparison of th. computational result with.experimental data and oth.r th.oretical results were provided. Excellent agreement of calculated free energies with.th. experimental data using TIP4 P model is obtained for liquid water.

关键词： excess free energy liquid MD simulation interaction entropy

Cascaded Sliding-mode Observer and Its Applications in Output Feedback Control Part I:Observer Design and Stability Analysis

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CSEE Journal of Power and Energy Systems 2021年第2期7卷 295-306页

作者： Tianh.o Wen Yang Liu Q.h.Wu Luonan qiu Sch.ol of Electric Power Engineering South China University of TechnologyGuangzhou 510640China

Th.s paper proposes a cascaded sliding-mode observer for systems with.h.gh.relative degree and studies its applications in output feedback controller *** part I,th. working principle and parameter design of th. proposed observer are discussed in *** is proved th.t,with.n a sufficiently sh.rt period of time,th. states of th. proposed observer will reach.th. intersection of all th. sliding *** sliding surfaces,th. observation error of th. proposed observer will converge to sufficiently small *** with.traditional h.gh.gain observers,th. proposed observer h.s smaller gain *** addition,th. peaking-ph.nomenon occurred in th. proposed observer is less ***,th. proposed observer h.s a convergence rate of observation error as fast as th.t of traditional h.gh.gain *** studies are carried out on a fifth.order system to verify th. properties of th. proposed observer.

关键词： Sliding-mode observer stability output feedback control

Analysis of Boundary Layer Structure,Turbulence,and Flux Variations before and after th. Passage of a Sea Breeze Front Using Meteorological Tower Data

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Journal of Meteorological Research 2023年第6期37卷 855-877页

作者： Ju LI Junxia DOU Donald h. LENSCh.W Mingyu Zh.U Lih.ng MENG Xiaobin qiu Yubing PAN Jingjiang Zh.NG Institute of Urban Meteorology(Key Laboratory of Urban Meteorology) China Meteorological AdministrationBeijing100089China State Key Laboratory of Severe Weath.r Chinese Academy of Meteorological SciencesChina Meteorological AdministrationBeijing100081China Beijing Research.Center for Urban Meteorological Engineering and Tech.ology Beijing100081China National Center for Atmosph.ric Research BoulderCO80307USA National Marine Environmental Prediction Center Beijing100081China Tianjin Key Laboratory for Oceanic Meteorology Tianjin300074China Tianjin Institute of Meteorological Science Tianjin300074China

A detailed analysis of a sea breeze front(SBF)th.t penetrated inland in th. Beijing–Tianjin–h.bei urban agglomeration of Ch.na was *** focused on th. boundary layer structure,turbulence intensity,and fluxes before and after th. SBF passed th.ough.two meteorological towers in th. urban areas of Tianjin and Beijing,*** ch.nges in temperature,h.midity,winds,CO_(2),and aerosol concentrations were observed as th. SBF *** in th.se ch.nges at th. two towers mainly resulted from th.ir distances from th. ocean,boundary layer conditions,and background *** th. SBF approach.d,a strong updraft appeared in th. boundary layer,carrying near-surface aerosols aloft and forming th. SBF *** was followed by a broad downdraft,wh.ch.destroyed th. near-surface inversion layer and temporarily increased th. surface air temperature at *** feeder flow after th. th.rmodynamic front was ch.racterized by low-level jets h.rizontally,and downdrafts and occasional updrafts *** increased significantly during th. SBF’s passage,causing an increase in th. standard deviation of wind components in *** increase in turbulence was more pronounced in a stable boundary layer compared to th.t in a convective boundary *** passage of th. SBF generated more mech.nical turbulences,as indicated by increased friction velocity and turbulent kinetic energy(TKE).Th. sh.ar term in th. TKE budget equation increased more significantly th.n th. buoyancy *** atmosph.re sh.fted to a forced convective state after th. SBF’s passage,with.near isotropic turbulences and uniform mixing and diffusion of *** h.at fluxes(latent h.at and CO_(2)fluxes)sh.wed positive(negative)peaks after th. SBF’s passage,primarily caused by h.rizontal and vertical transport of h.at(water vapor and CO_(2))during its *** study enh.nces understanding of boundary layer ch.nges,turbulences,and fluxes during th. passage of SBFs over u

关键词： sea breeze front boundary layer structure turbulence flux meteorological tower

Does Particulate Organic Matter Fraction Meet th. Criteria for a Model Soil Organic Matter Pool?

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Pedosph.re 2019年第2期29卷 195-203页

作者： Denis CURTIN Mich.el h.BEARE Weiwen qiu Joanna Sh.RP New Zealand Institute for Plant & Food Research.Limited

Th.re is a well-recognized need for improved fractionation meth.ds to partition soil organic matter into functional pools. Ph.sical separation based on particle size is widely used, yielding particulate organic matter(POM, i.e., free or "uncomplexed" organic matter> 50 μm) as th. most labile fraction. To evaluate wh.th.r POM meets criteria for an ideal model pool, we examined wh.th.r it is:1) unique, i.e., found only in th. > 50 μm fraction and 2) h.mogeneous, rath.r th.n a composite of different subfractions. Following ultrasonic dispersion, sand(> 50 μm) along with.coarse(20–50 μm) and fine(5–20 μm) silt fractions were isolated from a silt loam soil under long-term pasture at Lincoln, New Zealand. Th. sand and silt fractions contained 20% and 21% of total soil C, *** adopted a sequential density separation procedure using sodium polytungstate with.density increasing step-wise from 1.7 to 2.4 g cm^(-3) to recover organic matter(ligh. fractions) from th. sand and silt fractions. Almost all(ca. 90%) th. organic matter in th. sand fraction and a large proportion(ca. 60%–70%) in th. silt fractions was recovered by sequential density separation. Th. results suggested th.t POM is a composite of organo-mineral complexes with.varying proportions of organic and mineral materials. Part of th. organic matter associated with.th. silt fractions sh.red features in common with.POM. In a laboratory bio-assay, biodegradability of POM varied depending on land use(pasture > arable cropping). We concluded th.t POM is neith.r h.mogeneous nor unique.

关键词： biodegradability density separation labile fraction land use particle size fractionation sand silt sodium polytungstate

Bulk endocytosis at neuronal synapses

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Science Ch.na(Life Sciences) 2014年第4期57卷 378-383页

作者： NGUYEN Tam h.qiu XuFeng SUN JianYuan MEUNIER Frederic A Queensland Brain Institute The University of QueenslandBrisbane Institute of Bioph.sics Chinese Academy of Sciences

Neurotransmitter-containing synaptic vesicle(SV)fusion with.th. nerve terminal plasma membrane initiates neurotransmission in response to neuronal *** mild stimulation,th. fused vesicular membrane is retrieved via kiss-and-run and/or clath.in-mediated endocytosis,wh.ch.is sufficient to maintain recycling of *** neurons are ch.llenged with.very h.gh.stimulation,th. number of fused SVs can be extremely h.gh.resulting in significant plasma membrane *** such.conditions,a h.gh.r capacity retrieval path.ay,bulk endocytosis,is activated to redress th.s large membrane *** first being described more th.n 40 years ago,th. molecular mech.nisms underpinning th.s important process h.ve yet to be clearly *** th.s review,we h.gh.igh. th. current evidence for bulk endocytosis and its prevalence in various neuronal models,as well as discuss th. underlying molecular components.

关键词： bulk endocytosis synaptic vesicle recycling synapse neuron neurotransmission stimulation