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| 1 | In-situ growth of gold nanoparticles on electrospun flexible multilayered PVDF nanofibers for SERS sensing of molecules and bacteria显示文摘Plasmonic surface of flexible multilayered nanofibers possesses special superiority for the surface-enhanced Raman scattering(SERS)sensing of molecules and microbial cells.However,the fabrication of flexible plasmonic nanofibers with high sensitivity and reproducibility is difficult.Herein,we report a smart strategy for fabricating flexible plasmonic fibers,in which compact and homogeneous gold nanoparticles(Au NPs)are in-situ grown on the high-curvature surface of multilayered fibers of electrospun polyvinylidene fluoride(PVDF).Firstly,the surface of PVDF fibers is changed electrically,and Au seeds are deposited on the surface of PVDF fibers using electrostatic driving force.Secondly,a stable AuI_(4)−complex is formed employing coordination between I−and AuCl4−ions,which could decrease the reduction potential of AuCl4−and restrain the self-nucleation,and then the reduction reaction of AuI4−is initiated by introducing PVDF@Au seeds to pull down the barrier of potential energy.Finally,in-situ growth of AuNPs is generated on the high-curvature surface of PVDF nanofibers,and large-scale hotspots are generated by adjacent AuNPs coupling in the three-dimensional(3D)space of multilayered fibers.Membrane of PVDF@Au nanofibers also realizes the sensitive detection of thiram molecules(low limit of detection of 0.1 nM)and good reproducibility(relative standard deviation of 10.6%).Meanwhile,due to the multilayered construction of PVDF@Au nanofibers,a valid SERS signal on 3D surface of bacteria could be generated.3D distribution of hotspots on multilayered PVDF@Au nanofibers gives a clear advantage for SERS sensing of organic molecules and microbial cells. | Dongzhen Chen Liang Zhang Pan Ning Haozhi Yuan Yu Zhang Meng Zhang Tao Fu Xinhai He | 2021 | Nano Research2021，14，12： | 3 |
| 2 | Electrospun Fluorinated Polyimide/Polyvinylidene Fluoride Composite Membranes with High Thermal Stability for Lithium Ion Battery Separator显示文摘The separator with excellent mechanical and thermal properties are highly required for lithium ion batteries(LIBs).Therefore,it is crucial to develop novel nanofbrous membranes with enhanced mechanical strength and thermal stability.In this work,the fuorinated polyimide(FPI)was synthesized and blended with polyvinylidene fuoride(PVDF)to fabricate composite nanofbrous membranes(CNMs)via electrospinning method.Benefting from the introduction of aromatic FPI,the prepared PVDF/FPI nanofbrous membranes were endowed with enhanced mechanical strength and thermal stability.When the FPI content increased from 0 to 30 wt%,the tensile strength of composite nanofbrous membranes enhanced from 1.57 to 2.30 MPa.Moreover,there are almost no dimensional shrinkage for the CNM-30 containing 30 wt%FPI after heat treatment at 160℃ for 1 h.Furthermore,the prepared CNMs show improved electrochemical performances in comparison with neat PVDF and commercial Celgard membranes.The electrolyte uptake and ionic conductivity of the CNMs could reach to 522.4% and 1.14 ms·cm^(−1),respectively.The prepared CNMs could provide an innovative and promising approach for the development and design of high-performance separators. | Jianwei Li Xuanning Zhang Yuyan Lu Keliang Linghu Chen Wang Zhonglei Ma Xinhai He | 2022 | Advanced Fiber Materials2022，4，1： | 2 |
| 3 | Characterization and electrochemical properties of LiMn2O4 thin films prepared by solution deposition显示文摘 | Wu Xianming Ph D He Zeqiang Xu Mingfei Li Xinhai Xiao Zhuobing | 2006 | Journal of Wuhan University of Technology - Mater Sci Ed2006，，3： | 1 |
| 4 | Preparation of SnOz/C biomorphic materials by biotemplating from ramie fi- bers显示文摘 | HE Xinhai QI Lehua WANG Junbo | 2011 | Bull Mater Sci2011，34，5： | 1 |
| 5 | A Method to Adjust Dielectric Property of SiC Powder in the GHz Range显示文摘The SiC powders by Al or N doping have been synthesized by combustion synthesis, using Al powder and NH4Cl powder as the dopants and polytetra?uoroethylene as the chemical activator. Characterization by X-ray diffraction, Raman spectrometer, scanning electron microscopy and energy dispersive spectrometer demonstrates the formation of Al doped SiC, N doped SiC and the Al and N co-doped SiC solid solution powders, respectively. The electric permittivities of prepared powders have been determined in the frequency range of 8.2-12.4 GHz. It indicates that the electric permittivities of the prepared SiC powders have been improved by the pure Al or N doping and decrease by the Al and N co-doping. The paper presents a method to adjust dielectric property of SiC powders in the GHz range. | Xiaolei Su Jie Xu Zhimin Li Junbo Wang Xinhai He Chong Fu WanchengZhou | 2011 | Journal of Materials Science & Technology2011，27，5： | 1 |
| 6 | Low-temperature synthesis of nano-micron Li 4 Ti 5 O 12 by an aqueous mixing technique and its excellent electrochemical performance显示文摘 | Feixiang Wu Xinhai Li Zhixing Wang Huajun Guo Zhenjiang He Qian Zhang Xunhui Xiong Peng Yue | 2011 | Journal of Power Sources2011，，： | 1 |
| 7 | Micro-mechanical model for predicting the elasto-plastic behavior of composites based on secant formulation method显示文摘To predict the Elasto-Plastic Behaviors(EPBs)of aligned inclusions reinforced composites,this paper develops an interpolative Mori-Tanaka/Double-Inclusion(MT-DI)homogenization model with the secant formulation,and gives the numerical implementation algorithms of the developed MT-DI model with the secant formulation.The Finite Element(FE)homogenization method is implemented to provide the 'exact' EPBs of the composites and thus validate the MT-DI model with the secant formulation.The MT-DI model with the 2 nd-order secant formulation is validated to provide the more accurate predictions,while the MT-DI model with the 1 st-order secant formulation always gives the stiffer predictions.The results show that using the macro-stress and macrostrain as the inputs,the MT-DI model with the secant formulation gives the identical predictions.The predictions of the MT-DI model with the secant formulation vary between those of the MT and DI models with the secant formulation.Meanwhile,the MT-DI model with the secant formulation does not predict the accurate EPBs for the phases of the composites. | Junhao LIANG Xinhai HE Wenlong TIAN | 2021 | Chinese Journal of Aeronautics2021，34，1： | 0 |
| 8 | Simultaneous microwave characterization of wafer-level optoelectronic transceiver chips based on photonic sampling and mapping显示文摘Photonic integrated circuits(PICs)promise future parallelism growths of high-performance communication,computation,and offer unprecedented bandwidth scalability with reduced power consumption as a viable replacement for an electrical wire with an optoelectronic transceiver consisting of a transmitter and a receiver integrated on the same wafer.This wafer-level photonic integration,however,raises challenges for processing optical-electrical(O-E)and electricaloptical(E-O)characterization,which is crucial in chip fabrication and optimization[1]. | Yutong HE Xinhai ZOU Ying XU Zhihui LI Naidi CUI Junbo FENG Yali ZHANG Zhiyao ZHANG Shangjian ZHANG Yong LIU Ninghua ZHU | 2024 | Science China(Information Sciences)2024，67，2： | 0 |
| 9 | On demand bidirectional shape transformations and novel chiral actuators of photomediated shape memory polymer film based on photothermal OEGy-W_(18)O_(49)nanowires显示文摘The spatially controllable shape-shifting behaviors of a planar two-dimensional(2D)film to three-dimensional(3D)shapes upon external stimuli are of paramount significance for the development of smart materials.Herein,the present work focuses on fabricating plain film whose shape can be remotely and spatially transformed into various 3D configurations via the formation of a laser-induced temperature gradient;when subjected to laser irradiation,the prestretched hybrid films exhibit out-of-plane bending behavior owing to anisotropic chain relaxation and strain energy release.On this basis,various sophisticated shape transformations can be achieved by site-specific irradiations of laser with a controllable magnitude.Meanwhile,shape morphing involving reversible bending transformations can also be realized by employing the laser on the corresponding opposite side of the hybrid films.Remarkably,under a 160 mW/cm^(2) simulated sunlight illumination,the transformation of flat 2D film into 3D chiral actuators is driven by material anisotropy and geometrical heterogeneity of a bilayer strip design,and it yields right and left-handed helix,the morphologies of the helix shape can be precisely tailored by the strip angles and strain values. | TIAN GuangMing WANG Bo HE XinHai WANG Chen YANG Dong MA JianHua | 2023 | Science China(Technological Sciences)2023，66，12： | 0 |
| 10 | Bias-Independent Inter-Modulation Method for Simultaneously Measuring Low-Frequency Modulation and Bias Half-Wave Voltages of Mach-Zehnder Modulators显示文摘A bias-independent inter-modulation method is proposed and demonstrated for measuring low-frequency modulation and bias half-wave voltages of Mach-Zehnder modulators(MZMs).The method consists of simultaneous sinusoidal modulation on the modulation and bias ports of the MZM under test.Sinusoidal-modulated sidebands heterodyne with each other and generate the desired inter-modulation products after photodetection,which allows extracting both the modulation depth and half-wave voltage for the modulation and bias ports of the MZM.Our method is independent of bias voltages of the MZM,which can be canceled out by carefully choosing the sinusoidal-modulation frequencies.Moreover,the proposed method enables the low swing voltage for measuring both the modulation depth and half-wave voltage of MZMs.Experiments indicate that the proposed method features the simple setup and high accuracy for low-frequency response measurement ranging from 1 Hz to 1 MHz. | Junfeng ZHU Xinhai ZOU Ying XU Yutong HE Yali ZHANG Zhiyao ZHANG Shangjian ZHANG Yong LIU | 2023 | Photonic Sensors2023，13，2： | 0 |
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