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14篇 您的检索式:作者名="Yongyuan Zhu"
    题名 作者 年代 出处 被引量
1Surface Exciton-Plasmon Polariton Enhanced Light Emission via Integration of Single Semiconductor Nanowires with Metal Nanostructures显示文摘The light emission enhancement behavior from single ZnO nanowires integrated with metallic contacts is investigated by micro-photoluminescence measurements.Apart from surface plasmon polaritons at the air/metal interface,the emission of a single ZnO nanowire can be coupled into guided modes of surface exciton-plasmon polaritons(SEPPs).The out-coupling avenues of SEPP guided modes are modeled in the presence of nanostructures,such as corrugation and gratings,on the metal surface.The guided modes of SEPPs in metal-contacted ZnO nanowires are calculated using the effective index method.The enhanced light emission from single semiconductor nanowires shows promise for use in highly efficient nano-emitters and nano-lasers,as well as macroscopic solid state light sources with very high efficiency.Xuejin Zhang Pengwei Wang Xinzheng Zhang Jun Xu Yongyuan Zhu Dapeng Yu 2009Nano Research2009,2,1:2
2Serum from Acute-on-chronic Liver Failure Patients May Affect Mesenchymal Stem Cells Transplantation by Impairing the Immunosuppressive Function of Cells显示文摘Background and Aims:The safety and efficacy of mesenchymal stem cells(MSCs)in the treatment of acute-onchronic liver failure(ACLF)have been validated.However,the impact of the pathological ACLF microenvironment on MSCs is less well understood.This study was designed to explore the changes in the functional properties of MSCs exposed to ACLF serum.Methods:MSCs were cultured in the presence of 10%,30%and 50%serum concentrations from ACLF patients and healthy volunteers.Then,the cell morphology,phenotype,apoptosis and proliferation of MSCs were evaluated,including the immunosuppressive effects.Subsequently,mRNA sequencing analysis was used to identify the molecules and pathways involved in MSC functional changes in the context of ACLF.Results:In the presence of ACLF serum,MSC morphology significantly changed but phenotype did not.Besides,MSC proliferation activity was weakened,while the apoptosis rate was lightly increased.Most importantly,the immunosuppressive function of MSCs was enhanced in a lowconcentration serum environment but transformed into a proinflammatory response in a high-concentration serum environment.RNA sequencing indicated that 10%serum concentration from ACLF patients mediated the PI3K-Akt pathway to enhance the anti-inflammatory effect of MSCs,while the 50%serum concentration from ACLF patients promoted the conversion of MSCs into a proinflammatory function by affecting the cell cycle.Conclusions:The 50%ACLF serum concentration is more similar to the environment in the human body,which means that direct peripheral blood intravenous infusion of MSCs may reduce the effect of transplantation.Combining treatments of plasma exchange to reduce harmful substances in serum may promote MSCs to exert a stronger anti-inflammatory effect.Yongyuan Zheng Shu Zhu Xingrong Zheng Wenxiong Xu Xuejun Li Jianguo Li Zhiliang Gao Chan Xie Liang Peng 2021Journal of Clinical and Translational Hepatology2021,9,4:2
3Nickel single atom overcoordinated active sites to accelerate the electrochemical reaction kinetics for Li-S cathode显示文摘Lithium-sulfur(Li-S)batteries with high theoretical energy density are promising advanced energy storage devices.However,shuttling of dissolute lithium polysulfide(LiPSs)and sluggish conversion kinetics impede their applications.Herein,single nickel(Ni)atoms on two-dimensional(2D)nitrogen(N)-doped carbon with Ni-N_(4)-O overcoordinated structure(SANi-N_(4)-O/NC)are prepared and firstly used as a sulfur host of Li-S batteries.Due to the efficient polysulfides traps and highly LiPSs conversion effect of SANi-N_(4)-O/NC,the electrochemical performance of Li-S batteries obviously improved.The batteries can well operate even under high sulfur loading(5.8 mg cm^(-2))and lean electrolyte(6.1μL mg^(-1))condition.Meanwhile,density functional theory(DFT)calculations demonstrate that Ni single atom’s active sites decrease the energy barriers of conversion reactions from Li_(2)S_(8)to Li2S due to the strong interaction between SANi-N_(4)-O/NC and LiPSs.Thus,the kinetic conversion of LiPSs was accelerated and the shuttle effect is suppressed on SANi-N_(4)-O/NC host.This study provides a new design strategy for a 2D structure with single-atom overcoordinated active sites to facilitate the fast kinetic conversion of LiPSs for Li-S cathode.Juan Zhu Xinyue Wang Tian Ke Mingji Jia Biyu Jin Yuanyuan Li Qiwei Yang Lanhui Ren Yongyuan Ren Dangguo Cheng Jianguo Lu Xiang Gao Qinggang He Yang Hou Xiaoli Zhan Qinghua Zhang 2023Journal of Energy Chemistry2023,,3:2
4Dual effect of surface plasmons in light transmission through per- forated metal films显示文摘Huang Chengping Wang Qianjin Zhu Yongyuan 2007Phys Rev B2007,75,24:1
5Quasi - Phase - Matched Third- Harmonic Generation in a Quasi - Periodic Optical Superlattice显示文摘 Zhu Yongyuan Min Naiben 1997Science1997,278,31:1
6Dielectric Superlattices for Nonlinear Optical Effects显示文摘 Min Naiben 1999Optical and Quantum Electronic1999,,31:1
7Single-cavity triangular substrate integrated waveguide bandpass filter with complementary triangular split ring resonator显示文摘A novel single-cavity equilateral triangular substrate integrated waveguide(TSIW) bandpass filter(BPF) with a complementary triangular split ring resonator(CTSRR) is designed in this paper. A metallic via-hole is used to split the degenerate modes and adjust the transmission zeros(TZs) properly. Meanwhile, the CTSRR is utilized as a resonator to work together with the degenerate modes of the TSIW cavity. The resonant frequency of the CTSRR can be adjusted by its own size. Meanwhile, a TZ is observed in the lower band due to the CTSRR. Finally, a 16% 3 dB fractional bandwidth(FBW) triple-mode TSIW BPF with three TZs in both lower and upper bands is simulated, fabricated, and measured. There is a good agreement between the simulated and measured ones.Yang Tao Yan Yonghong Zhang Yue Guo Huijuan Zhu Yongyuan Huang Wei 2019The Journal of China Universities of Posts and Telecommunications2019,26,5:1
8Dark solitons and their head-on collisions in nonlinear metamaterials显示文摘Cui Weina Zhu Yongyuan Li Hongxiao 2009Phys Lett A2009,374,2:1
9Dark solitons and their head-on collisions in nonlinear metamaterials显示文摘Cui Weina Zhu Yongyuan Li Hongxia 0,,:1
10Optical properties of an ionic-type phononic crystal显示文摘Lu Yanqing Zhu Yongyuan 1999Science1999,284,:1
11Cruci- al effects of coupling coefficients on quasi-phase- matched harmonic generation in an optical superlattice 显示文摘Zhang Chao Zhu Yongyuan Yang Suxia 2000Optics Letters2000,25,:1
12Acoustic property of PbTiO3/SrTiO3 multilayer structures prepared by MOCVD and PLD methods显示文摘Yu Tao Chen Yanfeng Zhu Yongyuan 1999Applied Surface Science1999,,:1
13n-Pentylamine-intercalated layered perovskite-type oxide显示文摘A novel n-pentylamine-intercalated layered perovskite-type oxide, C5H11NH3-Sr2Nb3O10, was prepared and characterized by using XRD, FT-IR, Raman spec-trascopy, and elemental analysis. It was shown that the intercalated n-pentylamine adopted a bilayer formation with some overlap and tilt, and the lattice of the perovskite layer was distorted due to the intercalation of n-pentylamine. The as-prepared sample gave clear electric hysteresis loop and did not show fatigue after 1011 switching circles, and therefore, could be considered as a new kind of fatigue-free ferroelectric materials.HOU Wenhua ZHONG Zhaohui DING Weiping CHEN Yi CHEN Xiaoyuan ZHU Yongyuan MIN Naiben 2001Chinese Science Bulletin2001,46,8:0
14A micro-spectrometer with phase modulation array显示文摘Tao YANG Yuchao CHEN Xing'ao LI Wei HUANG Yongyuan ZHU 2014Frontiers of Optoelectronics2014,7,1:0
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