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| 1 | 镁合金表面耐蚀改性技术显示文摘镁及镁合金是一种极具发展潜力的轻质结构材料,但镁合金的耐蚀性较差,因此进行适当的表面处理以提高镁合金的耐蚀性能已成为目前研究的热点。微弧氧化、激光表面处理、离子注入、物理气相沉积(PVD)及等离子体注入沉积(IBAD)是近年来兴起的镁合金表面耐蚀强化新技术,这几种技术在处理镁合金耐蚀性方面已取得了一定的成果。综述了目前国内外应用这几种方法提高镁合金耐蚀性方面的研究现状,并展望了其应用前景。 | 韦春贝 张春霞 田修波 杨士勤 Ricky Fu Paul K.Chu | 2004 | 轻合金加工技术2004，32，6： | 18 |
| 2 | 9Cr18轴承钢的金属离子加氮离子复合注入处理新工艺显示文摘简单地叙述了金属等离子体浸没离子注入与沉积(MePIIID)表面处理新工艺的发展,以及MePIIID工艺对于脉冲阴极弧金属等离子体源的要求。详细报导了9Cr18轴承钢样品的氮离子注入表面处理工艺以及金属离子加氮离子复合注入处理新工艺。对被处理和未被处理试样进行了显微硬度、磨痕、摩擦因数及腐蚀特性测试后表明:用金属离子加氮离子复合注入处理的9Cr18钢试样的表面特性改善明显优于只用氮离子处理的试样,证明脉冲阴极弧金属等离子体源和气体等离子体浸没离子注入相结合是现代材料表面强化的一个很有效的手段。 | 汤宝寅 王松雁 王晓峰 甘孔银 曾照明 田修波 Paul K.Chu | 2000 | 中国表面工程2000，13，4： | 14 |
| 3 | 等离子体浸没离子注入(PIII)过程中初始离子阵鞘层尺度内各物理量的时空演化显示文摘等离子体浸没离子注入(PIII)是用于材料表面改性的一种较新的、廉价的、非视线的技术。靶体被浸没在等离子体中,等离子体中的离子在靶体负脉冲偏压的作用下注入靶体而实现材料的表面改性。为了描述等离子体浸没离子注入过程,我们引用了一维粒子模型(PIC)对其进行了数值模拟,该模型通过求解空间电势的Poisson方程,电子的Bolzmann分布以及离子在网格中受力运动的Newton运动方程来完成。本文重点研究了一个初始离子阵鞘层内电势、离子浓度、离子注入靶体的速度和动能以及离子流密度的时空演化规律。 | 黄永宪 田修波 杨士勤 黄志俊 Ricky Fu Paul K.Chu | 2005 | 真空科学与技术学报2005，25，2： | 10 |
| 4 | Graphene-encapsulated blackberry-like porous silicon nanospheres prepared by modest magnesiothermic reduction for high-performance lithium-ion battery anode显示文摘Porous silicon(Si)nanostructures have aroused much interest as lithium-ion battery anodes because of the large space to accommodate the volume change in lithiation and delithiation and shorter ion transfer distance.However,fabrication of porous structures tends to be difficult to control and complex,so,the final electrochemical performance can be compromised.Herein,a modest magnesiothermic reduction(MMR)reaction is demonstrated to produce blackberry-like porous Si nanospheres(PSSs)controllably using magnesium silicide(Mg_(2)Si)as Mg source and SiO_(2)nanospheres as the reactant.This improved MR method provides good control of the kinetics and heat release compared to the traditional MR(TMR)method using Mg powder as the reactant.The PSSs obtained by MMR reaction has higher structural integrity than that fabricated by TMR.After encapsulation with reduced graphene oxide,the Si/C composite exhibits superior cycling stability and rates such as a high reversible capacity of 1034 mAh·g^(-1)at0.5 C(4200 mAh·g^(-1)at 1.0 C)after 1000 cycles,capacity retention of 79.5%,and high rate capacity of 497 mAh·g^(-1)at 2.0 C.This strategy offers a new route to fabricate highperformance porous Si anodes and can be extended to other materials such as germanium. | Ben Xiang Wei-Li An Ji-Jiang Fu Shi-Xiong Mei Si-Guang Guo Xu-Ming Zhang Biao Gao Paul K.Chu | 2021 | Rare Metals2021，40，2： | 9 |
| 5 | Regulation of extracellular bioactive cations in bone tissue microenvironment induces favorable osteoimmune conditions to accelerate in situ bone regeneration显示文摘The design of orthopedic biomaterials has gradually shifted from“immune-friendly”to“immunomodulatory,”in which the biomaterials are able to modulate the inflammatory response via macrophage polarization in a local immune microenvironment that favors osteogenesis and implant-to-bone osseointegration.Despite the well-known effects of bioactive metallic ions on osteogenesis,how extracellular metallic ions manipulate immune cells in bone tissue microenvironments toward osteogenesis and subsequent bone formation has rarely been studied.Herein,we investigate the osteoimmunomodulatory effect of an extracellular bioactive cation(Mg^(2+))in the bone tissue microenvironment using custom-made poly lactic-co-glycolic acid(PLGA)/MgO-alendronate microspheres that endow controllable release of magnesium ions.The results suggest that the Mg^(2+)-controlled tissue microenvironment can effectively induce macrophage polarization from the M0 to M2 phenotype via the enhancement of anti-inflammatory(IL-10)and pro-osteogenic(BMP-2 and TGF-β1)cytokines production.It also generates a favorable osteoimmune microenvironment that facilitates the proliferation and osteogenic differentiation of bone marrow mesenchymal stem cells.The in vivo results further verify that a large amount of bony tissue,with comparable bone mineral density and mechanical properties,has been generated at an early post-surgical stage in rat intramedullary bone defect models.This study demonstrates that the concept of in situ immunomodulated osteogenesis can be realized in a controlled magnesium tissue microenvironment. | Zhengjie Lin Danni Shen Weixiao Zhou Yufeng Zheng Tiantian Kong Xuanyong Liu Shuilin Wu Paul K.Chu Ying Zhao Jun Wu Kenneth M.C.Cheung Kelvin W.K.Yeung | 2021 | Bioactive Materials2021，6，8： | 5 |
| 6 | Effects of external stress on biodegradable orthopedic materials: A review显示文摘Biodegradable orthopedic materials(BOMs)are used in rehabilitation and reconstruction of fractured tissues.The response of BOMs to the combined action of physiological stress and corrosion is an important issue in vivo since stress-assisted degradation and cracking are common.Although the degradation behavior and kinetics of BOMs have been investigated under static conditions,stress effects can be very serious and even fatal in the dynamic physiological environment.Since stress is unavoidable in biomedical applications of BOMs,recent work has focused on the evaluation and prediction of the properties of BOMs under stress in corrosive media.This article reviews recent progress in this important area focusing on biodegradable metals,polymers,and ceramics. | Xuan Li Chenglin Chu Paul K.Chu | 2016 | Bioactive Materials2016，1，1： | 5 |
| 7 | 类金刚石涂层的厚度对生物医用NiTi合金力学性能和腐蚀行为的影响(英文)显示文摘采用电弧增强磁控溅射技术在生物医用NiTi合金表面沉积253~1880nm厚的类金刚石涂层。用轮廓仪、划擦仪、摩擦磨损仪和电化学工作站等检测涂层的力学性能和腐蚀行为。结果发现,厚度在700~1000nm之间的涂层具有较低的残余应力、较高的膜基结合力、长的磨损寿命和良好的耐腐蚀性。因此,更适合于作为生物医用NiTi合金的保护性涂层,同时也对NiTi合金表面类金刚石涂层的厚度对其力学性能和腐蚀行为的影响机制进行探讨。 | 杭瑞强 马胜利 Paul K.Chu | 2012 | 稀有金属材料与工程2012，41，9： | 4 |
| 8 | 等离子体浸没离子注入球形靶的鞘层尺度显示文摘对于等离子体浸没离子注入 (PIII)技术 ,球形靶鞘层尺度预测对真空室设计、批量处理研究等是十分有用的。但由于球形靶鞘层Child Langmuir定律数学表达的非线性使得工程应用较为困难。本文对球形靶的鞘层尺度进行了数值求解、讨论了注入参数对鞘层尺度的影响。计算结果表明 ,鞘层厚度 (包括离子阵鞘层和稳态鞘层 )随球体半径或注入电压增加而增加 ,随等离子体密度增加而减小。但对于不同的参数区间 ,鞘层特性对参数的变化表现出不同的敏感性。当等离子体密度较高、注入电压较低时 ,稳态鞘层厚度对于靶体半径的变化极不敏感。相反鞘层厚度对靶体大小变化较为敏感。虽然平面靶与球形靶的离子阵鞘层尺度比值与等离子体密度及球体半径有关 ,但平面靶稳态鞘层尺度总是大于球形靶的。这对于实际的PIII应用具有重要的指导意义。 | 田修波 Paul K.Chu | 2001 | 真空科学与技术2001，21，2： | 3 |
| 9 | Engineered polycaprolactone–magnesium hybrid biodegradable porous scaffold for bone tissue engineering显示文摘In this paper, we describe the fabrication of a new biodegradable porous scaffold composed of polycaprolactone(PCL) and magnesium(Mg)micro-particles. The compressive modulus of PCL porous scaffold was increased to at least 150% by incorporating 29% Mg particles with the porosity of 74% using Micro-CT analysis. Surprisingly, the compressive modulus of this scaffold was further increased to at least 236% when the silane-coupled Mg particles were added. In terms of cell viability, the scaffold modified with Mg particles significantly convinced the attachment and growth of osteoblasts as compared with the pure PCL scaffold. In addition, the hybrid scaffold was able to attract the formation of apatite layer over its surface after 7 days of immersion in normal culture medium, whereas it was not observed on the pure PCL scaffold. This in vitro result indicated the enhanced bioactivity of the modified scaffold. Moreover, enhanced bone forming ability was also observed in the rat model after 3 months of implantation. Though bony in-growth was found in all the implanted scaffolds. High volume of new bone formation could be found in the Mg/PCL hybrid scaffolds when compared to the pure PCL scaffold. Both pure PCL and Mg/PCL hybrid scaffolds were degraded after 3 months. However, no tissue inflammation was observed. In conclusion, these promising results suggested that the incorporation of Mg micro-particles into PCL porous scaffold could significantly enhance its mechanical and biological properties. This modified porous bio-scaffold may potentially apply in the surgical management of large bone defect fixation. | Hoi Man Wong Paul K.Chu Frankie K.L.Leung Kenneth M.C.Cheung Keith D.K.Luk Kelvin W.K.Yeung | 2014 | Progress in Natural Science:Materials International2014，24，5： | 3 |
| 10 | Improving exposure of anodically ordered Ni-Ti-O and corrosion resistance and biological properties of NiTi alloys by substrate electropolishing显示文摘Although Ni-Ti-O nanopores(NPs) can be fabricated by anodization of mechanically polished NiTi alloys, the top disordered layer is difficult to remove thus hindering the functionality of the Ni-Ti-O NPs. In this work, an electropolishing(EP) pretreatment was performed on the NiTi substrate prior to anodization to thoroughly expose the NPs. Our results show that the EP pretreatment for 5 min perfectly removes the top disordered layer on the Ni-Ti-O NPs to expose the underlying NPs and consequently, the corrosion resistance and antibacterial ability are enhanced. The exposed NPs can elongate bone marrow mesenchymal stem cells, which may be responsible for the upregulated alkaline phosphatase activity, secretion of Type I collagen, and extracellular matrix mineralization. These results suggest that EP is a desirable pretreatment before anodization of the NiTi alloys because the irregular surface layer on the Ni-Ti-O NPs can be removed to enhance the corrosion resistance and biological functions. | Yong-Hua Sun Ya Zhao Yu-Yu Zhao You-Jie Rong Run-Hua Yao Xiao-Hong Yao Rui-Qiang Hang Paul K.Chu | 2021 | Rare Metals2021，40，12： | 2 |
| 11 | A programmed surface on polyetheretherketone for sequentially dictating osteoimmunomodulation and bone regeneration to achieve ameliorative osseointegration under osteoporotic conditions显示文摘Polyetheretherketone(PEEK)is a desirable alternative to conventional biomedical metals for orthopedic implants due to the excellent mechanical properties.However,the inherent bioinertness of PEEK contributes to inferior osseointegration of PEEK implants,especially under pathological conditions of osteoporosis.Herein,a programmed surface is designed and fabricated on PEEK to dictate osteoimmunomodulation and bone regeneration sequentially.A degradable hybrid coating consisting of poly(lactide-co-glycolide)and alendronate(ALN)loaded nano-hydroxyapatite is deposited on PEEK and then interleukin-4(IL-4)is grafted onto the outer surface of the hybrid coating with the aid of N_(2) plasma immersion ion implantation and subsequent immersion in IL-4 solution.Dominant release of IL-4 together with ALN and Ca^(2+) during the first few days synergistically mitigates the early acute inflammatory reactions and creates an osteoimmunomodulatory microenvironment that facilitates bone regeneration.Afterwards,slow and sustained delivery of ALN and Ca^(2+) in the following weeks boosts osteogenesis and suppresses osteoclastogenesis simultaneously,consequently ameliorating bone-implant osseointegration even under osteoporotic conditions.By taking into account the different phases in bone repair,this strategy of constructing advanced bone implants with sequential functions provides customizable and clinically viable therapy to osteoporotic patients. | Yanyan Zheng Ang Gao Jiaxiang Bai Qing Liao Yuzheng Wu Wei Zhang Min Guan Liping Tong Dechun Geng Xin Zhao Paul K.Chu Huaiyu Wang | 2022 | Bioactive Materials2022，7，8： | 2 |
| 12 | Stepwise 3D-spatio-temporal magnesium cationic niche: Nanocomposite scaffold mediated microenvironment for modulating intramembranous ossification显示文摘The fate of cells and subsequent bone regeneration is highly correlated with temporospatial coordination of chemical,biological,or physical cues within a local tissue microenvironment.Deeper understanding of how mammalian cells react to local tissue microenvironment is paramount important when designing next generation of biomaterials for tissue engineering.This study aims to investigate that the regulation of magnesium cationic(Mg^2+)tissue microenvironment is able to convince early-stage bone regeneration and its mechanism undergoes intramembranous ossification.It was discovered that moderate Mg^2+content niche(~4.11 mM)led to superior bone regeneration,while Mg^2+-free and strong Mg^2+content(~16.44 mM)discouraged cell adhesion,proliferation and osteogenic differentiation,thereby bone formation was rarely found.When magnesium ions diffused into free Mg zone from concentrated zone in late time point,new bone formation on free Mg zone became significant through intramembranous ossification.This study successfully demonstrates that magnesium cationic microenvironment serves as an effective biochemical cue and is able to modulate the process of bony tissue regeneration.The knowledge of how a Mg^2+cationic microenvironment intertwines with cells and subsequent bone formation gained from this study may provide a new insight to develop the next generation of tissuerepairing biomaterials. | Jie Shen Bo Chen Xinyun Zhai Wei Qiao Shuilin Wu Xuanyong Liu Ying Zhao Changshun Ruan Haobo Pan Paul K.Chu Kenneth M.C.Cheung Kelvin W.K.Yeung | 2021 | Bioactive Materials2021，6，2： | 2 |
| 13 | Co/C/Si(100)结构固相外延生长CoSi_2显示文摘采用 Co/C/Si多层薄膜结构的中间层诱导固相外延方法在 Si(10 0 )上制备外延 Co Si2 薄膜 .用四探针电阻仪、XRD、AES、RBS等分析手段对该结构固相反应形成的薄膜的电学特性、组分、晶体结构等进行了表征 .结果表明 ,Co/C/Si多层结构经快速热退火 ,可以在 Si(10 0 )衬底上得到导电性能和高温稳定性良好的 Co Si2 薄膜 .C层的加入阻碍了 Co和 Si的互扩散和互反应 ,从而促进了 Co Si2 在硅衬底上的外延 . | 屈新萍 徐蓓蕾 茹国平 李炳宗 W.Y.Cheung S.P.Wong Paul K.Chu | 2003 | Journal of Semiconductors2003，24，1： | 1 |
| 14 | Selective inhibition effects on cancer cells and bacteria of Ni–Ti–O nanoporous layers grown on biomedical NiTi alloy by anodization显示文摘Stents made of nearly equiatomic NiTi alloy are used to treat malignant obstruction caused by cancer,but prevention of re-obstruction after surgery is still a challenge because the bare stents possess poor anticancer and antibacterial properties to inhibit cancer/bacteria invasion.The present work aims at endowing the NiTi alloy with anticancer and antibacterial abilities by surface modification.Ni–Ti–O nanoporous layers with different thicknesses were prepared on NiTi by anodization,and biological experiments were conducted to evaluate the effects on gram-positive Staphylococcus aureus,human lung epithelial cancer cells(A549),as well as human endothelial cells(EA.hy926).The nanoporous layer with a thickness of 10.1 lm inhibits growth of cancer cells and kill bacteria but shows little adverse effects on normal cells.Such selectivity is related to the larger amount of Ni ions leached from the sample in the acidic microenvironment of cancer cells in comparison with normal cells.The Ni–Ti–O nanoporous layers are promising as coatings on NiTi stents to prevent re-obstruction after surgery. | Yan-Lian Liu Yong-Hua Sun Ya Zhao Chun-Lin Li Fei-Long Zhao Xiao-Hong Yao Rui-Qiang Hang Paul K.Chu | 2022 | Rare Metals2022，41，1： | 1 |
| 15 | Mechanical and Corrosion Behavior of a Biomedical Mg–6Zn–0.5Zr Alloy Containing a Large Number of Twins显示文摘The strong texture of Mg alloys can lead to strong tension–compression yield asymmetry and corrosion anisotropy,and this will consequently affect the effectiveness of hard tissue implants.A biomedical Mg–6Zn–0.5Zr alloy containing a large number of{1012}primary twins and{1012}–{1012}secondary twins is successfully prepared by cross compression.The dual twin structure not only removes the tension–compression yield asymmetry completely,but effectively reduces the corrosion anisotropy without compromise of corrosion resistance.The difference between the largest corrosion rate and smallest one is~1.2 times compared to~1.6 times of the original materials.It is found that the reduced corrosion anisotropy is related to re-distribution of crystallographic orientations by twins. | Chang‑Jian Yan Bo Guan Yun‑Chang Xin Ling‑Yu Zhao Guang‑Jie Huang Rui Hong Xiao‑Bo Chen Paul K.Chu | 2023 | Acta Metallurgica Sinica(English Letters)2023，36，3： | 1 |
| 16 | Plasma-activated interfaces for biomedical engineering显示文摘As an important phenomenon to monitor disease development,cell signaling usually takes place at the interface between organisms/cells or between organisms/cells and abiotic materials.Therefore,finding a strategy to build the specific biomedical interfaces will help regulate information transmission and produce better therapeutic results to benefit patients.In the past decades,plasmas containing energetic and active species have been employed to construct various interfaces to meet biomedical demands such as bacteria inactivation,tissue regeneration,cancer therapy,and so on.Based on the potent functions of plasma modified surfaces,this mini-review is aimed to summarize the state-of-art plasma-activated interfaces and provide guidance to researchers to select the proper plasma and processing conditions to design and prepare interfaces with the optimal biological and related functions.After a brief introduction,plasma-activated interfaces are described and categorized according to different criteria including direct plasma-cells interfaces and indirect plasma-material-cells interfaces and recent research activities on the application of plasma-activated interfaces are described.The authors hope that this mini-review will spur interdisciplinary research efforts in this important area and expedite associated clinical applications. | Pei Liu Guomin Wang Qingdong Ruan Kaiwei Tang Paul K.Chu | 2021 | Bioactive Materials2021，6，7： | 1 |
| 17 | Antibacterial nano-structured titania coating incorporated with silver nanoparticles显示文摘 | Lingzhou Zhao Hairong Wang Kaifu Huo Lingyun Cui Wenrui Zhang Hongwei Ni Yumei Zhang Zhifen Wu Paul K.Chu | | 0，，： | 1 |
| 18 | Synthesis and Photocatalytic Activity of Highly Ordered TiO<sub>2</sub> and SrTiO<sub>3</sub>/TiO<sub>2</sub> Nanotube Arrays on Ti Substrates显示文摘 | XumingZhang KaifuHuo LiangshengHu ZhengweiWu Paul K.Chu | 2010 | Journal of the American Ceramic Society2010，，9： | 1 |
| 19 | Se-Ni Se_(2) hybrid nanosheet arrays with self-regulated elemental Se for efficient alkaline water splitting显示文摘Understanding the catalytic mechanism of non-noble transition metal electrocatalysts is crucial to designing high-efficiency,low-cost,and durable alternative electrocatalysts for water splitting which comprises the hydrogen evolution reaction(HER) and oxygen evolution reaction(OER).In this work,Se-NiSe_(2) hybrid nanosheets with a self-regulated ratio of ionic Se(I-Se) to elemental Se(E-Se) are designed on carbon cloth by solution synthesis and hydrothermal processing.The effects of the I-Se/E-Se ratios on the electrocatalytic characteristics in HER and OER are investigated systematically both experimentally and theoretically.The optimized bifunctional electrocatalyst needs overpotentials of only 133 mV to deliver an HER current density of 10 mA cm^(-2) and 350 mV to generate an OER current density of 100 mA cm^(-2) in1.0 mol L^(-1) KOH.Based on the density-functional theory calculation,surface-adsorbed E-Se is beneficial to optimizing the electron environment and the adsorption/desorption free energy of hydrogen/water of the hybrid catalyst,consequently facilitating the electrocatalytic water splitting process.There is a proper I-Se/E-Se ratio to improve the catalytic activity and kinetics of the reaction and the optimized E-Se adsorption amount can balance the interactions between I-Se and E-Se,so that the catalyst can achieve appropriate Se-H binding and active site exposure for the excellent electrocatalytic activity.To demonstrate the practicality,the assembled symmetrical device can be powered by an AA battery to produce hydrogen and oxygen synchronously.Our results provide a deeper understanding of the catalytic mechanism of transition metal selenides in water splitting and insights into the design of high-efficiency and low-cost electrocatalysts in energy-related applications. | Xiang Peng Yujiao Yan Shijian Xiong Yaping Miao Jing Wen Zhitian Liu Biao Gao Liangsheng Hu Paul K.Chu | 2022 | Journal of Materials Science & Technology2022，，23： | 1 |
| 20 | Environmentally friendly wollastonite@TiO2 composite particles prepared by a mechano-chemical method显示文摘Core-shell wollastonite@ TiO2(WOT)composite particles are prepared by a mechano-chemical method (MCM)to improve the dispersion of TiO2and reduce its dosage,and to achieve synergistic effects with the wollastonite mineral.The crystal structure,morphology,functional groups,and pigment properties of the as-prepared composite powders are determined.The W@T composite particles are formed by van der Waals force in addition to electrostatic attraction and chemical bonding.The anatase TiO2coating is anchored on the woUastonite surface by Si-O-Ti and Ca-O-Ti bonds.The W@T powders possess excellent characteristics such as whiteness of 96.6%,hiding power of 17.97g/m^2,and oil absorption of 22.72g/100g.The properties of the W@T composite are similar to those of TiO2and the former,which is much cheaper,can potentially substitute the latter as a white paint in many applications. | Xifeng Hou Yihe Zhang Hao Ding Paul K.Chu | 2018 | Particuology2018，16，5： | 1 |
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