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| 1 | Corrosion mechanism of micro-arc oxidation treated biocompatible AZ31 magnesium alloy in simulated body fluid显示文摘The rapid degradation of magnesium(Mg) based alloys has prevented their further use in orthopedic trauma fixation and vascular intervention,and therefore it is essential to investigate the corrosion mechanism for improving the corrosion resistance of these alloys. In this work, the effect of applied voltage on the surface morphology and the corrosion behavior of micro-arc oxidation(MAO) with different voltages were carried out to obtain biocompatible ceramic coatings on AZ31 Mg alloy. The effects of applied voltage on the surface morphology and the corrosion behavior of MAO samples in the simulated body fluid(SBF) were studied systematically. Scanning electron microscope(SEM) and X-ray diffractometer(XRD)were employed to characterize the morphologies and phase compositions of coating before and after corrosion. The results showed that corrosion resistance of the MAO coating obtained at 250 V was better than the others in SBF. The dense layer of MAO coating and the corrosion precipitation were the key factors for corrosion behavior. The corrosion of precipitation Mg(OH)2and the calcium phosphate(Ca–P) minerals on the surface of MAO coatings could enhance their corrosion resistance effectively. In addition, the mechanism of MAO coated Mg alloys was proposed. | Ying Li Fang Lu Honglong Li Wenjun Zhu Haobo Pan Guoxin Tan Yonghua Lao Chengyun Ning Guoxin Ni | 2014 | Progress in Natural Science:Materials International2014，24，5： | 7 |
| 2 | Chip-based ion chromatography (chip-IC) with a sensitive five-electrode conductivity detector for the simultaneous detection of multiple ions in drinking water显示文摘The emerging need for accurate,efficient,inexpensive,and multiparameter monitoring of water quality has led to interest in the miniaturization of benchtop chromatography systems.This paper reports a chip-based ion chromatography(chip-IC)system in which the microvalves,sample channel,packed column,and conductivity detector are all integrated on a polymethylmethacrylate(PMMA)chip.A laser-based bonding technique was developed to guarantee simultaneous robust sealing between the homogeneous and heterogeneous interfaces.A five-electrode-based conductivity detector was presented to improve the sensitivity for nonsuppressed anion detection.Common anions(F^(−),Cl^(−),NO_(3)^(−),and SO _(4)^(2−))were separated in less than 8 min,and a detection limit(LOD)of 0.6 mg L^(−1) was achieved for SO_(4)^(2−).Tap water was also analyzed using the proposed chip-IC system,and the relative deviations of the quantified concentration were less than 10%when compared with that a commercial IC system. | Xiaoping Li Honglong Chang | 2020 | Microsystems & Nanoengineering2020，6，1： | 2 |
| 3 | Alloy-Electrode-Assisted High-Performance Enhancement-Type Neodymium-Doped Indium-Zinc-Oxide Thin-Film Transistors on Polyimide Flexible Substrate显示文摘Flexible thin-film transistors with high current-driven capability are of great significance for the next-generation new display technology.The effect of a Cu-Cr-Zr(CCZ)copper alloy source/drain(S/D)electrode on flexible amorphous neodymiumdoped indium-zinc-oxide thin-film transistors(NdIZO-TFTs)was investigated.Compared with pure copper(Cu)and aluminum(Al)S/D electrodes,the CCZ S/D electrode changes the TFT working mode from depletion mode to enhancement mode,which is ascribed to the alloy-assisted interface layer besides work function matching.X-ray photoelectron spectroscopy(XPS)depth profile analysis was conducted to examine the chemical states of the contact interface,and the result suggested that chromium(Cr)oxide and zirconium(Zr)oxide aggregate at the interface between the S/D electrode and the active layer,acting as a potential barrier against residual free electron carriers.The optimal NdIZO-TFT exhibited a desired performance with a saturation mobility(μsat)of 40.3 cm^(2)·V-1·s^(-1),an Ion/Ioff ratio of 1:24×10^(8),a subthreshold swing(SS)value of 0.12 V·decade^(-1),and a threshold voltage(Vth)of 0.83 V.This work is anticipated to provide a novel approach to the realization of highperformance flexible NdIZO-TFTs working in enhancement mode. | Kuankuan Lu Rihui Yao Wei Xu Honglong Ning Xu Zhang Guanguang Zhang Yilin Li Jinyao Zhong Yuexin Yang Junbiao Peng | 2021 | Research2021，，1： | 1 |
| 4 | Application Application of an Optimization Methodology for Multidisciplinary System Design of Microgyroscopes 显示文摘 | Yuan Weizheng Chang Honglong Li Weijian | 2006 | Microsystem Technology2006，12，： | 1 |
| 5 | Analysis of phases in a Cu–Cr–Zr alloy显示文摘 | Huang Fuxiang Ma Jusheng Ning Honglong Geng Zhiting Lu Chao Guo Shumei Yu Xuetao Wang Tao Li Hong Lou Huafen | 2003 | Scripta Materialia2003，，1： | 1 |
| 6 | Effects of 1800-MHz Radiofrequency Fields on Circadian Rhythm of Plasma Melatonin and Testosterone in Male Rats显示文摘 | Fenju Qin Jie Zhang Honglong Cao Cao Yi JianXiang Li Jihua Nie LiLi Chen Jiajun Wang Jian Tong | 2012 | Journal of Toxicology and Environmental Health Part A2012，，18： | 1 |
| 7 | Structure tailorable triple-phase and pure double-polar-phase flexible IF-WS_(2)@poly(vinylidene fluoride)nanocomposites with enhanced electrical and mechanical properties显示文摘A new low-cost high-permittivity flexible nanocomposite consisting of a polyvinylidene fluoride(PVDF)matrix and fullerene-like tungsten disulfide nanoparticle(IF-WS2 NP)filler was fabricated via a simple solution route.A comprehensive investigation by X-ray diffraction,attenuated total reflection-infrared spectroscopy,and differential scanning calorimetry(DSC)showed that 0.5e1 vol% of IF-WS_(2) induced a nonpolar α-phase to coexisting triple-phase transition in PVDF,whereas a slightly higher loading of 2 vol% induced pure double-polar β- and γ-phases.These results indicate that the structure and properties of the fabricated nanocomposite are easily tailorable.DSC during heating and cooling cycles and morphology observations further indicated that a polar phase was induced by the nucleation effect of the IF-WS2 NPs and electrostatic interactions.As a consequence of the multiphase coexistence and structure homogeneity,nanocomposites with approximately 0.5-1 vol% of IF-WS_(2) NPs showed enhanced dielectric and energy-storage performance as well as enhanced tensile strength and elongation.The new phase-tailorable nanocomposites with balanced properties are promising for applications as energystorage capacitors,piezoelectric sensors,and other flexible multifunctional components.The results of this study will serve to deepen the understanding of the polymer polymorph and provide directions on new routes for fabrication of smart materials. | Dong Guo Kai Cai Pingye Deng Guoning Si Liangying Sun Fahui Chen Honglong Ning Li Jin Jingtao Ma | 2020 | Journal of Materiomics2020，6，3： | 0 |
| 8 | Micromechanical mode-localized electric current sensor显示文摘This paper outlines the design of a novel mode-localized electric current sensor based on a mechanically sensitive element of weakly coupled resonator systems.With the advantage of a high voltage sensitivity of weakly coupled resonator systems,the current under test is converted to voltage via a silicon shunt resistor,which causes stiffness perturbation to one resonator.The mode-localization phenomenon alters the energy distribution in the weakly coupled resonator system.A theoretical model of current sensing is established,and the performance of the current sensor is determined:the sensitivity of the electric current sensor is 567/A,the noise floor is 69.3 nAA/Hz,the resolution is 183.6 nA,and the bias instability is 81.6 nA.The mode-localized electric current sensor provides a new approach for measuring sub-microampere currents for applications in nuclear physics,including for photocurrent signals and transistor leakage currents.It could also become a key component of a portable mode-localized multimeter when combined with a mode-localized voltmeter.In addition,it has the potential for use in studying sensor arrays to achieve higher resolution. | Han Li Zhao Zhang Luhan Zu Yongcun Hao Honglong Chang | 2022 | Microsystems & Nanoengineering2022，8，2： | 0 |
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