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| 1 | AFM research on Fe-based nanocrystal crystallization mechanism显示文摘The cross-section pattern of Fe-based alloy ribbon (Fe73.5Cu1Nb3Si13.5B9) annealed at different temperatures was investigated by AFM (atomic force microscope), and the effect mechanism of Nb and Cu in Fe-based alloy ribbon annealing was analyzed with XRD diffraction crystal analysis technique and other research results. New concepts of encapsulated grain, Nb vacancy cluster, Nb-B atom cluster and so on were proposed and used to describe the formation mechanism of α-Fe (Si) nanocrystal. Finally, a three-phase (separation phase, encapsulated phase and nanocrystalline phase) interconnected structure model in Fe-based nanocrystalline alloy was established. | FANG YunZhang WU FengMin ZHENG JinJu SHI FangYe WU WenHui SUN HuaiJun LIN GenJin MAN QiKui HU JuanMei YANG XiaoHong | 2008 | Science China(Technological Sciences)2008，51，1： | 8 |
| 2 | Giant magnetoimpedance effect in stress-joule-heated Co-based amorphous ribbons显示文摘Co-based Co63Fe4B22.4Si5.6Nb5 amorphous ribbons with a width of 150 μm and a thickness of 50 μm were prepared by single-roller melt-spinning process.The giant magneto-impedance(GMI) effect of the stress-joule-heated ribbons under applied tensile stress ranging from 37 to 148 MPa was investigated.Experimental results show that the spectra of GMI ratio vs.external direct current(dc) field(Hex) of the samples changes dramatically with annealing tension() and driving frequency.The single-peak(SP) GMI curve with maximum GMI ratio of 260% and magnetic field sensitivity of 52%/Oe was obtained in the sample applied tensile stress of 74 MPa at frequency of 3.6 MHz.A three-peak behaviour appeared in the samples under σ of 111 and 148 MPa.The uncommon three-peak behaviour was attributed to several factors,which effectively originated from the balance between domain-wall movement and magnetization rotation. | CHEN ShuangQin MAN QiKui DUN ChaoChao SHEN BaoLong | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，12： | 3 |
| 3 | Ultrathin, flexible, and high-strength Ni/Cu/metallic glass/Cu/Ni composite with alternate magneto-electric structures for electromagnetic shielding显示文摘Electromagnetic interference(EMI)shielding materials with ultrathin,flexible,superior mechanical and thermal management properties are highly desirable for smart and wearable electronics.Here,ultrathin and flexible Ni/Cu/metallic glass/Cu/Ni(Ni/Cu/MG)multilayer composite with alternate magnetic and electrical structures was designed via facial electroless plating of Cu and Ni on an Fe-based metallic glass.The resultant 0.02 mm-thick Ni/Cu/MG composite displays a superior EMI shielding effectiveness(EMI SE)of 35 dB and a great EMI SE/t of 1750 dB/mm,which is greater than those of composites with monotonous multilayer or homogeneous structures.The improved EMI SE originates from the massive ohmic losses,the enhanced internal reflection/absorption,and the abundant interfacial polarization loss.Particularly,Ni/Cu/MG exhibits a high tensile strength of up to 1.2 GPa and outstanding mechanical stability,enabling the EMI SE remains unchanged after 10,000 times of bending.Moreover,Ni/Cu/MG has excellent Joule heating characteristics and thermal stability,which is very suitable for heating components of wearable hyperthermia devices. | Zenan Ma Jiawei Li Jijun Zhang Aina He Yaqiang Dong Guoguo Tan Mingqiang Ning Qikui Man Xincai Liu | 2021 | Journal of Materials Science & Technology2021，，22： | 3 |
| 4 | Total conversion of centimeter-scale nickel foam into single atom electrocatalysts with highly selective CO_(2)electrocatalytic reduction in neutral electrolyte显示文摘To improve the atomic utilization of metals and reduce the cost of industrialization,the one-step total monoatomization of macroscopic bulk metals,as opposed to nanoscale metals,is effective.In this study,we used a thermal diffusion method to directly convert commercial centimeter-scale Ni foam to porous Ni single-atom-loaded carbon nanotubes(CNTs).As expected,owing to the coating of single-atom on porous,highly conductive CNT carriers,Ni single-atom electrocatalysts(Ni-SACs)exhibit extremely high activity and selectivity in CO_(2)electroreduction(CO_(2)RR),yielding a current density of>350 mA/cm^(2),a selectivity for CO of>91%under a flow cell configuration using a 1 M potassium chloride(KCl)electrolyte.Based on the superior activity of the Ni-SACs electrocatalyst,an integrated gas-phase electrochemical zero-gap reactor was introduced to generate a significant amount of CO current for potential practical applications.The overall current can be increased to 800 mA,while maintaining CO Faradaic efficiencies(FEs)at above 90%per unit cell.Our findings and insights on the active site transformation mechanism for macroscopic bulk Ni foam conversion into single atoms can inform the design of highly active single-atom catalysts used in industrial CO_(2)RR systems. | Qikui Fan Pengfei Gao Shan Ren Yunteng Qu Chuncai Kong Jian Yang Yuen Wu | 2023 | Nano Research2023，16，2： | 2 |
| 5 | A new type of longitudinally driven GMI effect of FeCo-based alloy显示文摘On investigating the longitudinally driven GMI effect of the DC annealed Fe36Co36Nb4Si4.8B19.2 alloy rib-bon,the current density was 3.2×107 A/m2,the GMI effect responds sensitively(the sensitivity is as high as 2440.2%/(A.m?1))to weak magnetic field after a 600-second annealing.The experimental result shows that the sensitivity is closely related to annealing current density,driven current frequency and eroded thickness. | MAN QiKui FANG YunZhang SUN HuaiJun YE FangMin | 2008 | Chinese Science Bulletin2008，53，3： | 2 |
| 6 | Thermal stability, magnetic and mechanical properties of Fe–Dy–B–Nb bulk metallic glasses with high glass-forming ability显示文摘 | Jiawei Li Weiming Yang Diana Estévez Guoxin Chen Wenguang Zhao Qikui Man Yuanyun Zhao Zhidong Zhang Baolong Shen | 2014 | Intermetallics2014，，： | 1 |
| 7 | THE COUPLING OF NBEM AND FEM FOR QUASILINEAR PROBLEMS IN A BOUNDED OR UNBOUNDED DOMAIN WITH A CONCAVE ANGLE显示文摘基于 Kirchhoff 转变和自然边界元素方法,我们为伪线性的问题调查 a coupled 天赋边界元素方法和有限元素方法在一跳或有一个凹面角度的无界的领域。由自然边界减小的原则,我们在圆形的弧上获得自然不可分的方程人工的边界,并且得到联合变化问题和它的数字方法。而且,近似答案的集中和错误估计被获得。最后,一些数字例子被举显示出我们的方法的可行性。我们的工作能被看作 H.D 汉等的存在工作的延期 ...[ 摘要从作者] | Baoqing Liu Qikui Du | 2013 | Journal of Computational Mathematics2013，31，3： | 1 |
| 8 | Dirichlet-Neumann alternating algorithm based on the natural boundary reduction fortime-dependent problems over an unbounded domain 显示文摘 | Du Qikui Yu Dehao | 2003 | Applied Numerical Mathematics2003，44，4： | 1 |
| 9 | Magnetic-electric composite coating with oriented segregated structure for enhanced electromagnetic shielding显示文摘Manipulation of the internal architecture is essential for electromagnetic interference(EMI)shielding performance of metal-based coatings,which can address the electromagnetic pollution in large-size,complex geometries,and harsh environments.In this work,oriented segregated structure with conductive networks embedded in magnetic matrix was achieved in Fe-based amorphous coatings via Ni-Cu-P functionalization of(Fe_(0.76)Si_(0.09)B_(0.1)P_(0.05))_(99)Nb_(1)amorphous powder precursors and then thermal spraying them onto aluminum(Al)substrate.Benefiting from the unique magnetic-electric structure,the coating@Al composite delivered prominent EMI shielding performance.The EMI shielding effectiveness(SE)of modified coating@Al composite is~41 dB at 8-12 GHz,doubling the value of Al substrate and is 15 dB greater than that of Ni-Cu-P-free coating@Al composite.Microstructure analysis showed that the introduced Ni−Cu−P insertions forcefully suppress the serious oxidation of the magnetic precursors during thermal spraying and form a dense conductive network in the magnetic matrix.Electron holography observation and electromagnetism simulation clarified that the modified coating can effectively trap and attenuate the incident radiations because of the electric loss from Ni−Cu−P conductive network,magnetic loss from Fe-based amorphous coating,and the electromagnetic interactions in the oriented segregated architectures.Moreover,the optimized thermal isolation and mechanical properties brought by structural improvement enable the coating to shield complex parts in thermal shock and mechanical loading environments.Our work gives an insight on the design strategies for metal-based EMI shielding materials and enriches the fundamental understanding of EMI shielding mechanisms. | Jijun Zhang Zexuan Wang Jiawei Li Yaqiang Dong Aina He Guoguo Tan Qikui Man Bin Shen Junqiang Wang Weixing Xia Jun Shen Xin-min Wang | 2022 | Journal of Materials Science & Technology2022，，1： | 1 |
| 10 | Customizable Ligand Exchange for Tailored Surface Property of Noble Metal Nanocrystals显示文摘It is highly desirable,while still challenging,to obtain noble metal nanocrystals with custom capping ligands,because their colloidal synthesis relies on specific capping ligands for the shape control while conventional ligand exchange processes suffer from“the strong replaces the weak”limitation,which greatly hinders their applications.Herein,we report a general and effective ligand exchange approach that can replace the native capping ligands of noble metal nanocrystals with virtually any type of ligands,producing flexibly tailored surface properties.The key is to use diethylamine with conveniently switchable binding affinity to the metal surface as an intermediate ligand.As a strong ligand,it in its original form can effectively remove the native ligands;while protonated,it loses its binding affinity and facilitates the adsorption of new ligands,especially weak ones,onto the metal surface.By this means,the irreversible order in the conventional ligand exchange processes could be overcome.The efficacy of the strategy is demonstrated by mutual exchange of the capping ligands among cetyltrimethylammonium,citrate,polyvinylpyrrolidone,and oleylamine.This novel strategy significantly expands our ability to manipulate the surface property of noble metal nanocrystals and extends their applicability to a wide range of fields,particularly biomedical applications. | Qikui Fan Hao Yang Juan Ge Shumeng Zhang Zhaojun Liu Bo Lei Tao Cheng Youyong Li Yadong Yin Chuanbo Gao | 2020 | Research2020，，1： | 1 |
| 11 | Studies on In Vitro Slow-Release Characteristics and Anticancer Effect of 5-Fluorouracil-Loaded Immuno-Nanoparticles显示文摘OBJECTIVE To investigate slow-release features of biodegradable anticancer 5-fluorouracil-loaded immunonanoparticles (5-FU INPs), and to assess their tumor cell killing activity in vitro. METHODS The method of vibrating dialysis at a constant temperature, and first-order derivative ultraviolet spectrophotometry were used to deter- mine the drug-releasing character of 5-FU INPs. The methyl thiazolyl tetrazo- lium (MTT) colorimetric method was employed to assay the killing activity of 5-FU INPs on 5 tumor cell lines at different phases. RESULTS The 5-FU INPs had a favorable slow-release function, with a ot1n/2 r5e lteuamseo rt icmeell olifn 1e0s. 4re dsauyltsin. gT hine 5a- FpUos IiNtivPes choardre ala rtaivtihtye rb setrtwonege nle tthhael keiflfleincgt activity and the action time and amount of the drug released. CONCLUSION The drug disposition is uniform from the 5-FU INPs, and there is no impact on efficacy of the 5-FU during preparation and degra- dation of the 5-FU INPs. The 5-FU INPs have a favorable function for drug release, and can maintain an effective killing activity over a long period of time. | Kaihong Huang Jianhua Liu Lingyun Wang Zhaohua Zhu Qikui Chen Jun Min Rufu Chen | 2007 | Chinese Journal of Clinical Oncology2007，4，4： | 0 |
| 12 | AFM research on the mechanism of Fe-based alloy stress annealed inducing magnetic anisotropy显示文摘The cross-section of the Fe-based alloy (Fe73.5Cu1Nb3Si13.5B9) ribbon annealed at 540℃ under various tensile stress was investigated with atomic force microscope (AFM). The stress effect mechanism in Fe-based alloy ribbon tensile stress an-nealed inducing transverse magnetic anisotropy field was studied using the X-ray diffraction spectra and longitudinal drive giant magneto-impedance effect curves, and the model of direction dominant in encapsulated grain agglomeration was es-tablished. The relationship between the direction dominant in encapsulated grain agglomeration and magnetic anisotropy field was disclosed. | FANG YunZhang ZHENG JinJu SHI FangYe WU FengMin SUN HuaiJun LIN GenJin YANG XiaoHong MAN QiKui YE FangMin | 2008 | Science China(Technological Sciences)2008，51，9： | 0 |
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