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40篇 您的检索式:作者名="MENGYUE XU"
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1Vertically stacked holey graphene/polyaniline heterostructures with enhanced energy storage for on-chip micro-supercapacitors显示文摘平面 micro-supercapacitors (MSC ) 为 microelectronic 设备由于他们的唯一的结构的设计和尺寸相容性画了广泛的研究注意。Graphene 广泛地被用来改进 microscale 的表演电气化学的电容器。然而,为基于 graphene 的 microscale 设备的内在的电气化学的机制的调查仍然不是足够的。这里,有各种各样的典型体系结构的 micro-supercapacitors 作为模型被制作学习 graphene 效果,和他们的电气化学的表演也被评估。结果证明离子的可接近性和吸附极大地在有穴的 graphene 中介层的介绍以后被改进。这研究提供一条新线路理解内在的电气化学的行为并且为高度有效的在薄片上拥有令人激动的潜力微精力的存储。Xiaocong Tian Bei Xiao Xu Xu Lin Xu Zehua Liu Zhaoyang Wang Mengyu Yan Qiulong Wei Liqiang Mai 2016Nano Research2016,9,4:7
2Capacitance and voltage matching between MnO2 nanoflake cathode and Fe2O3 nanoparticle anode for high-performance asymmetric micro-supercapacitors显示文摘象在使小型化的电子设备的精力存储单位潜在的平面 micro-supercapacitors 表演伟人。不对称的结构广泛地在 micro-supercapacitors 被调查了,并且基于碳的材料通常在电极被使用。在 micro-supercapacitors 在两个电极集成不同金属氧化物,批评挑战是配对不同感应电的金属氧化物。此处,我们建议匹配充分集成于由一个灵巧、可控制的制造过程的一高效的不对称的 micro-supercapacitor 的二感应电的材料的电压和电容的策略。制作 micro-supercapacitors 作为积极活跃材料和 Fe 22> O 3 作为否定活跃材料分别地。平面不对称的 micro-supercapacitors 拥有 60 F 的一个高电容??Zehua Liu Xiaocong Tian Xu Xu Liang He Mengyu Yan Chunhua Han Yan Li Wei Yang Liqiang Mai 2017Nano Research2017,10,7:5
3Bias-drift-free Mach–Zehnder modulators based on a heterogeneous silicon and lithium niobate platform显示文摘Optical modulators have been and will continue to be essential devices for energy-and cost-efficient optical communication networks.Heterogeneous silicon and lithium niobate modulators have demonstrated promising performances of low optical loss,low drive voltage,and large modulation bandwidth.However,DC bias drift is a major drawback of optical modulators using lithium niobate as the active electro-optic material.Here,we demonstrate high-speed and bias-drift-free Mach–Zehnder modulators based on the heterogeneous silicon and lithium niobate platform.The devices combine stable thermo-optic DC biases in silicon and ultra-fast electro-optic modulation in lithium niobate,and exhibit a low insertion loss of 1.8 d B,a low half-wave voltage of 3 V,an electro-optic modulation bandwidth of at least 70 GHz,and modulation data rates up to 128 Gb/s.SHIHAO SUN MINGBO HE MENGYUE XU SHENGQIAN GAO ZIYAN CHEN XIAN ZHANG ZILIANG RUAN XIONG WU LIDAN ZHOU LIN LIU CHAO LU CHANGJIAN GUO LIU LIU SIYUAN YU XINLUN CAI 2020Photonics Research2020,8,12:5
4Direct site-specific treatment of skin cancer using doxorubicin-loaded nanofibrous membranes显示文摘Doxorubicin(DOX) is widely used in cancer therapy. However, its application is sometimes limited by its adverse cardiotoxicity and delivery pathways. In our study, we prepared a topical implantable delivery device for controlled drug release and site-specific treatment. The core region consisted of poly(lactic co-glycolic acid) and poly-caprolactone, whereas the shell region was composed of cross-linked gelatin.DOX was enclosed in the core region of a core-shell nanofiber obtained by electrospinning. This implantable delivery device was implanted on the top of the melanoma in a mouse model, which had shown a DOX-controlled release profile with sustained and sufficient local concentration against melanoma growth in mice with negligible side effects. Compared with the traditional intravenous administration,the implantable device allows precisely localized treatment and therefore can reduce the dose, decrease the injection frequency, and ensure antitumor efficacy associated with lower side effects to normal tissues. Using a coaxial electrospinning process, it is promising to deliver different hydrophobic or hydrophilic drugs for direct tumor site-specific therapy without large systemic doses and minimized systemic toxicity.Mengyu Guo Guoqiang Zhou Zhu Liu Jing Liu Jinglong Tang Yating Xiao Wenshi Xu Ying Liu Chunying Chen 2018Science Bulletin2018,63,2:4
5High-performance polarization management devices based on thin-film lithium niobate显示文摘High-speed polarization management is highly desirable for many applications,such as remote sensing,telecommunication,and medical diagnosis.However,most of the approaches for polarization management rely on bulky optical components that are slow to respond,cumbersome to use,and sometimes with high drive voltages.Here,we overcome these limitations by harnessing photonic integrated circuits based on thin-film lithium niobate platform.We successfully realize a portfolio of thin-film lithium niobate devices for essential polarization management functionalities,including arbitrary polarization generation,fast polarization measurement,polarization scrambling,and automatic polarization control.The present devices feature ultra-fast control speeds,low drive voltages,low optical losses and compact footprints.Using these devices,we achieve high fidelity polarization generation with a polarization extinction ratio up to 41.9 dB and fast polarization scrambling with a scrambling rate up to 65 Mrad s−1,both of which are best results in integrated optics.We also demonstrate the endless polarization state tracking operation in our devices.The demonstrated devices unlock a drastically new level of performance and scales in polarization management devices,leading to a paradigm shift in polarization management.Zhongjin Lin Yanmei Lin Hao Li Mengyue Xu Mingbo He Wei Ke Heyun Tan Ya Han Zhaohui Li Dawei Wang X.Steve Yao Songnian Fu Siyuan Yu Xinlun Cai 2022Light(Science & Applications)2022,11,5:3
6MoS2/MnO2 heterostructured nanodevices for electro- chemical energy storage显示文摘Xiaobin Liao Yunlong Zhao Junhui Wang Wei Yang Lin Xu Xiaocong Tian Yi Shuang Kwadwo Asare Owusu Mengyu Yan Liqiang Mai 2018Nano Research2018,11,4:2
7A New Brown Frog of the Genus Rana(Anura,Ranidae)from North China,with a Taxonomic Revision of the R.chensinensis Species Group显示文摘The Rana chensinensis species group is widely distributed throughout North China.However,its taxonomy and composition remain controversial.In recent field investigations of the Taihang Mountains,a series of Rana specimens were collected,which were once identified as R.chensinensis.However,these samples showed significant differences from R.chensinensis of the type locality(Shaanxi Province in the Qinling Mountains)in both morphology and genetics.In this paper,based on analyses of seventeen geographic populations from the Taihang and Qinling Mountains,we describe a new species(namely R.taihangensis sp.nov.)in the R.chensinensis species group.A phylogenetic analysis of the R.chensinensis species group based on mitochondrial genes—COI,16S rRNA and Cytb—revealed the monophyly of the cryptic species,which formed the sister taxon to R.kukunoris.Morphological comparisons indicated that the cryptic species can be distinguished from its congeners by a combination of characteristics.Additionally,the distribution patterns of the Rana species in North China were clarified.The populations of the southwestern Taihang Mountains,Xiaoqinling Mountains,and Funiu Mountains in Henan Province remain R.chensinensis,whereas the populations recorded as R.chensinensis in Beijing City,Hebei Province,and the southeastern Taihang Mountains of Henan Province should be revised as R.taihangensis sp.nov.Huijun SHEN Mengyu XU Xinyue YANG Zhuo CHEN Nengwen XIAO Xiaohong CHEN 2022Asian Herpetological Research2022,13,3:2
8Electric field and photoelectrical effect bi-enhanced hydrogen evolution reaction显示文摘Mengyu Yan Xunbiao Zhou Xuelei Pan dunhui Wang Lixue Xia Kesong Yu Xiaobin Liao Xu Xu Liang He Liqiang Mai 2018Nano Research2018,11,6:2
9Realizing the highly reversible Zn^(2+)and Na^(+) dual ions storage in high-crystallinity nickel hexacyanoferrate microcubes for aqueous zinc-ion batteries显示文摘Prussian blue analogues(PBAs)with the 3D open framework are regarded as promising cathode candidates for aqueous Zinc ion batteries(ZIBs).Among various PBAs,nickel hexacyanoferrate(NiHCF)has attracted considerable attention because of its high operating voltage and economic merit.However,the cyclability of NiHCF is unsatisfactory due to poor structural stability during Zn^(2+) ions insertion/deinsertion.Moreover,the ion storage mechanism of NiHCF in aqueous electrolytes has not been fully revealed yet.Herein,high-crystallinity NiHCF(HC-NiHCF)microcubes with improved structural stability and larger crystal plane spacing are synthesized.For the first time,highly reversible Zn2+ions and Na+ions co-insertion/extraction are achieved for the HC-NiHCF microcubes in mixed aqueous electrolyte,as evidenced by various observations including two separated discharge plateaus and sequential changes of Na 1s and Zn 2p signals in ex-situ X-ray photoelectron spectroscopy(XPS).As a result,a high specific capacity of 73.9 mAh g^(−1) is obtained for the HC-NiHCF microcubes at 0.1 A g−1,combined with enhanced cycle stability(75%vs.16.4%)over 1000 cycles at 2 A g^(−1).The reversible Zn^(2+) ions and Na+ions co-insertion in HC-NiHCF microcubes reveals a new ion storage mechanism of Ni-based PBAs in aqueous electrolytes.Kexuan Wang Zhu Xu Heng Li Huibo Wang Mingzheng Ge Jilei Liu Shengwen Li Zekun Hu Mengyu Zhu Yanyan Zhang Yuxin Tang Shi Chen 2023Journal of Materials Science & Technology2023,,33:1
10Preparation and charac- terization of chiral polyaniline/barium hexaferrite composite with enhanced microwave absorbing properties显示文摘Xu Fenfang Ma Li Gan Mengyu 2014J Alloys Compd2014,593,:1
11Preparation and characterization of chiral polyaniline/barium hexaferrite composite with enhanced microwave absorbing properties 显示文摘Fen_fang Xu Li Ma Mengyu Gan 2014Journal of Alloys and Compounds2014,593,:1
12Boosting Interfacial Polarization Through Heterointerface Engineering in MXene/Graphene Intercalated-Based Microspheres for Electromagnetic Wave Absorption显示文摘Multi-layer 2D material assemblies provide a great number of interfaces beneficial for electromagnetic wave absorption.However,avoiding agglomeration and achieving layer-by-layer ordered intercalation remain chal-lenging.Here,3D reduced graphene oxide(rGO)/MXene/TiO_(2)/Fe_(2)C lightweight porous microspheres with periodical intercalated structures and pronounced inter-facial effects were constructed by spray-freeze-drying and microwave irradiation based on the Maxwell–Wagner effect.Such approach reinforced interfacial effects via defects introduction,porous skeleton,multi-layer assembly and multi-compo-nent system,leading to synergistic loss mechanisms.The abundant 2D/2D/0D/0D intercalated heterojunctions in the microspheres provide a high density of polari-zation charges while generating abundant polarization sites,resulting in boosted interfacial polarization,which is verified by CST Microwave Studio simulations.By precisely tuning the 2D nanosheets intercalation in the heterostructures,both the polarization loss and impedance matching improve significantly.At a low filler loading of 5 wt%,the polarization loss rate exceeds 70%,and a minimum reflection loss(RLmin)of-67.4 dB can be achieved.Moreover,radar cross-section simulations further confirm the attenuation ability of the optimized porous microspheres.These results not only provide novel insights into understanding and enhancing interfacial effects,but also constitute an attractive platform for implementing heterointerface engineering based on customized 2D hierarchical architectures.Ge Wang Changfeng Li Diana Estevez Peng Xu Mengyue Peng Huijie Wei Faxiang Qin 2023Nano-Micro Letters2023,15,9:1
13Lattice-Boltzmann Models for Heat Transfer显示文摘A multispeed heat transfer lattice Boltzmann model is presented. The model possesses the perfect gas state equation with arbitrary special heat ratio. The macroscopic conservation equations are derived by the Chapman- Enskog method.The one dimensional simulation for the sinusoidal energy distributions are compared with the theoretical results, showing good agreement.The theoretical conductivity in the energy equation is in accordance with the simulations.Chenghai SUN,Zujun XU,Baoguo WANG &Mengyu SHEN (Dept. of Engineering Mechanics,Tsing- hua University,Beijing,1 0 0 0 84) 1997Communications in Nonlinear Science and Numerical Simulation1997,2,4:1
14Preparation and characterization of chiral polyaniline/barium hexaferrite composite with enhanced microwave absorbing properties 显示文摘Xu Fenfang Ma Li Gan Mengyu 2014Journal of Alloys and Compounds2014,593,:1
15Understanding the dynamical-microphysical-electrical processes associated with severe thunderstorms over the Beijing metropolitan region显示文摘The Dynamical-microphysical-electrical Processes in Severe Thunderstorms and Lightning Hazards(STORM973)project conducted coordinated comprehensive field observations of thunderstorms in the Beijing metropolitan region(BMR)during the warm season from 2014 to 2018.The aim of the project was to understand how dynamical,microphysical and electrical processes interact in severe thunderstorms in the BMR,and how to assimilate lightning data in numerical weather prediction models to improve severe thunderstorm forecasts.The platforms used in the field campaign included the Beijing Lightning Network(BLNET,consisting of 16 stations),2 X-band dual linear polarimetric Doppler radars,and 4 laser raindrop spectrometers.The collaboration also made use of the China Meteorological Administration’s mesoscale meteorological observation network in the Beijing-Tianjin-Hebei region.Although diverse thunderstorm types were documented,it was found that squall lines and multicell storms were the two major categories of severe thunderstorms with frequent lightning activity and extreme rainfall or unexpected local short-duration heavy rainfall resulting in inundations in the central urban area,influenced by the terrain and environmental conditions.The flash density maximums were found in eastern Changping District,central and eastern Shunyi District,and the central urban area of Beijing,suggesting that the urban heat island effect has a crucial role in the intensification of thunderstorms over Beijing.In addition,the flash rate associated with super thunderstorms can reach hundreds of flashes per minute in the central city regions.The super(5%of the total),strong(35%),and weak(60%)thunderstorms contributed about 37%,56%,and 7%to the total flashes in the BMR,respectively.Owing to the close connection between lightning activity and the thermodynamic and microphysical characteristics of the thunderstorms,the lightning flash rate can be used as an indicator of severe weather events,such as hail and short-duration heavy rainfall.Lightning data can also be assimilated into numerical weather prediction models to help improve the forecasting of severe convection and precipitation at the cloud-resolved scale,through adjusting or correcting the thermodynamic and microphysical parameters of the model.Xiushu QIE Shanfeng YUAN Zhixiong CHEN Dongfeng WANG Dongxia LIU Mengyu SUN Zhuling SUN Abhay SRIVASTAVA Hongbo ZHANG Jingyu LU Hui XIAO Yongheng BI Liang FENG Ye TIAN Yan XU Rubin JIANG Mingyuan LIU Xian XIAO Shu DUAN Debin SU Chengyun SUN Wenjing XU Yijun ZHANG Gaopeng LU Da-Lin ZHANG Yan YIN Ye YU 2021Science China Earth Sciences2021,64,1:1
16siRNA-functionalized lanthanide nanoparticle enables efficient endosomal escape and cancer treatment显示文摘Attaching DNA/RNA to nanomaterials is the basis for nucleic acid-based assembly and drug delivery.Herein,we report that small interfering RNA(siRNA)effectively coordinates with ligand-free lanthanide nanoparticles(NaGdF4 NPs),and forms siRNA/NaGdF4 spherical nucleic acids(SNA).The coordination is primarily attributed to the interaction between Gd and phosphate backbone of the siRNA.Surprisingly,an efficient encapsulation and rapid endosomal escape of siRNA from the endosome/lysosome were achieved,due to its flexible ability to bound to phospholipid head of endosomal membrane,thereby disrupting the membrane structure.Resorting to the dual properties of NaGdF4 NPs,siRNA loading,and endosomal escape,siRNA targeting programmed cell death-ligand 1(siPD-L1)/NaGdF4 SNA triggers significant gene silencing in vitro and in vivo,and effectively represses the tumor growth in both CT26 tumor model and 4T1 orthotopic murine model.Chanchan Yu Kun Li Lin Xu Bo Li Chunhui Li Shuai Guo Ziyue Li Yuquan Zhang Abid Hussain Hong Tan Mengyu Zhang Yongxiang Zhao Yuanyu Huang Xing-Jie Liang 2022Nano Research2022,15,10:1
17Regulation of actin cytoskeleton via photolithographic micropatterning显示文摘Actin cytoskeleton plays crucial roles in various cellular functions.Extracellular matrix(ECM)can modulate cell morphology by remodeling the internal cytoskeleton.To define how geometry of ECM regulates the organization of actin cytoskeleton,we plated individual NIH 3T3 cells on micropatterned substrates with distinct shapes and sizes.It was found that the stress fibers could form along the nonadhesive edges of T-shaped pattern,but were absent from the opening edge of V-shaped pattern,indicating that the organization of actin cytoskeleton was dependent on the mechanical environment.Furthermore,a secondary actin ring was observed on 50μm circular pattern while did not appear on 30μm and 40μm pattern,showing a size-dependent organization of actin cytoskeleton.Finally,osteoblasts,MDCK and A549 cells exhibited distinct organization of actin cytoskeleton on T-shaped pattern,suggesting a cell-type specificity in arrangement of actin cytoskeleton.Together,our findings brought novel insight into the organization of actin cytoskeleton on micropatterned environments.Fulin Xing Haimei Zhang Mengyu Li Hao Dong Xuehe Ma Shiyu Deng Fen Hu Imshik Lee Leiting Pan Jingjun Xu 2023Journal of Innovative Optical Health Sciences2023,16,2:1
18Design of single-phased magnesium alloys with typically high solubility rare earth elements for biomedical applications:Concept and proof显示文摘Rare earth elements(REEs)have been long applied in magnesium alloys,among which the mischmetal-containing WE43 alloy has already got the CE mark approval for clinical application.A considerable amount of REEs(7 wt%)is needed in that multi-phased alloy to achieve a good combination of mechanical strength and corrosion resistance.However,the high complex RE addition accompanied with multiple second phases may bring the concern of biological hazards.Single-phased Mg-RE alloys with simpler compositions were proposed to improve the overall performance,i.e.,“Simpler alloy,better performance”.The single-phased microstructure can be successfully obtained with typical high-solubility REEs(Ho,Er or Lu)through traditional smelting,casting and extrusion in a wide compositional range.A good corrosion resistance with a macroscopically uniform corrosion mode was guaranteed by the homogeneously single-phased microstructure.The bimodal-grained structure with plenty of sub-grain microstructures allow us to minimize the RE addition to<1 wt%,without losing mechanical properties.The single-phased Mg-RE alloys show comparable mechanical properties to the clinically-proven Mg-based implants.They exhibited similar in-vitro and in-vivo performances(without local or systematic toxicity in SD-rats)compared to a high purity magnesium.In addition,metal elements in our single-phased alloys can be gradually excreted through the urinary system and digestive system,showing no consistent accumulation of RE in main organs,i.e.,less burden on organs.The novel concept in this study focuses on the simplification of Mg-RE based alloys for biomedical purpose,and other biodegradable metals with single-phased microstructures are expected to be explored.Dong Bian Xiao Chu Jin Xiao Zhipei Tong He Huang Qinggong Jia Jianing Liu Wenting Li Hui Yu Yue He Limin Ma Xiaolan Wang Mei Li Tao Yang Wenhan Huang Chi Zhang Mengyu Yao Yu Zhang Zhigang Xu Shaokang Guan Yufeng Zheng 2023Bioactive Materials2023,,4:1
19NCL-based mitochondrial-targeting fluorescent probe for the detection of Glutathione in living cells显示文摘Glutathione(GSH) plays a critical role in maintaining cellular redox homeostasis in biological system.Mitochondrion is a pivotal organelle for cellular aerobic respiration and its disorder is associated with impaired redox balance, leading to cell death. In this work, we designed and synthesized a non-invasive“off-on” mitochondrial-targeting fluorescent probe QZ for the detection of GSH in living cells. Based on the mechanism of native chemical ligation(NCL) and fluorescence resonance energy transfer(FRET), a rhodamine B derivative, QZ was prepared, by choosing aromatic thioester bond as the selective reaction site. QZ exhibited excellent detection capability for GSH over Cys and Hcy. Upon addition of GSH to QZ solution, a remarkably enhanced fluorescence was observed with a limit of detection of 2.98 μmol/L.Furthermore, QZ was found to possess the specific mitochondrial localization ability in cell imaging experiments. Moreover, with exogenous and endogenous stimulations, QZ could image GSH in living cells.Tongxia Jin Mengyu Cui Dan Wu Weiping Zhu Yufang Xu Xuhong Qian 2021Chinese Chemical Letters2021,32,12:1
20Prepa- ration and characterization of chiral polyaniline/barium hexaferrite composite with enhanced microwave absorb- ing properties 显示文摘Fenfang Xu Li Ma Mengyu Gan Jihai Tang 2014Journal of Alloys and Compounds2014,593,:1
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