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microstructural evolution and superelastic properties of ultrafine-graine d NiTi-base d shape memory alloy via sintering of amorphous ribbon precursor

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Journal of Materials Science & Technology 2023年第7期138卷 80-92页

作者： W.S.Cai H.Z.Lu H.Z.Li Z.Liu H.B.Ke W.H.Wang C.Yang National Engineering Research Center of Near-net-shape Forming for Metallic Materials Guangdong Provincial Key Laboratory for Processing and Forming of Advanced Metallic MaterialsSouth China University of TechnologyGuangzhou 510640China Songshan Lake Materials Laboratory Dongguan 523808China Institute of Physics Chinese Academy of SciencesBeijing 100190China

NiTi-based shape memory alloys(SMAs)are co.sidered as cutting-edge intelligent functional ***,it remains a great challenge to obtain ultrafine-grained(UFGed)bulk materials with mm-scale size as well as outstanding superelastic ***,UFGed bulk Ti_(35)Zr_(15)Ni_(35)Cu_(15)NiTi-based SMA is successfully prepared via spark plasma sintering of amorphous ribbon precursor at different sintering temperatures,and microstructural evolution and superelastic properties are symmetrically *** is found that its grain size ranges from UFG to micro-grain with increased sintering temperature regard-less of the predominant B2 matrix in all bulk ***,the orientation relationships between B2 matrix and nano-scale fcc(Ti,Zr)_(2)Ni precipitate evolve from co.erent to ***,the UFGed samples exhibit perfect superelasticity with the high reco.erable strain of∼5.8%,the stable reco.-ery rate above 99%,and the great critical stress inducing martensitic transformation higher than 1 GPa,far superior to the co.responding ones of suction-cast micro-grained TiZrNiCu ***,the perfect superelasticity is attributed to the good resistance to dislocation slip or grain boundary slip by residual nano-scale amorphous phase or seco.dary phase of co.erent and semi-co.erent fcc(Ti,Zr)_(2)Ni *** addition,the gentle superelastic plateau is associated to the favorable transfer stress and the strong ability to acco.modate dislocation movement,which is generated by the co.erent interface between nano-scale fcc(Ti,Zr)_(2)Ni and UFGed B2 *** results suggest that spark plasma sintering of amorphous alloy precursor is a feasible route to obtaining excellent superelasticity in NiTi-based SMAs.

关键词： Shape memory alloy Amorphous alloy microstructure Superelasticity

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co.tinuous-flow photochemistry: An expanding horizon of sustainable technology

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Chinese Chemical Letters 2020年第9期31卷 2395-2400页

作者： Jingli Xie Dongyuan Zhao co.lege of Biological Chemical Science and EngineeringJiaxing UniversityJiaxing 314001China Chemistry and Chemical Engineering guangdong Laboratory Guangdong Technion–Israel Institute of Technology(GTIIT)Shantou 515031China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Department of Chemistry and Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsiChEM and State Key Laboratory of Molecular Engineering of PolymersFudan UniversityShanghai 200433China

Understanding the unique characteristics of co.tinuous-flow photochemistry will lead to a paradigm shift in the way we enhance sustainability and *** this mini-review,we first provide a succinct overview of working principles of this technique and discuss several recent synthetic ***,emphasis is given to those representative examples which address environmental issues such as indoor air pollutants and water ***,recent progress made using this technique to deal with rising co. emission,solar energy utilization and biomedical equipment is *** is believed that this mini-review co.ld inspire more chemists to utilize this technique in their research,either in the academic or industrial field.

关键词： co.tinuous-flow photochemistry Synthesis Environmental application micro-reaction technology Sustainable technology

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Research on cigarette during smoking based on reverse engineering and numerical simulation

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中国化学工程学报（英文版） 2019年第10期

作者： Darong Tang Junzhang Wu Jinsong Zeng Wenhua Gao Liang Du State Key Laboratory of Pulp and Paper Engineering， Plant micro/Nano Fiber Research Center， South China University of Technology China Tobacco.guangdong Industrial co.Ltd.

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Preparation of double perovskite-type oxide LaSrFeco._6 for chemical looping steam methane reforming to produce syngas and hydrogen

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Journal of Rare Earths 2016年第10期34卷 1032-1041页

作者：赵坤沈阳何方黄振魏国强郑安庆李海滨赵增立 Key Laboratory of Renewable Energy Chinese Academy of Sciences Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Guangzhou 510640 China guangdong Key Laboratory of New and Renewable Energy Research and Development Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Guangzhou 510640 China Universiiy of Chinese Academy of Sciences Beijing 100049 China

Double-perovskite type oxide LaSrFeco._6 was used as oxygen carrier for chemical looping steam methane reforming（CL-SMR） due to its unique structure and reactivity. Solid-phase, amorphous alloy, sol-gel and micro-emulsion methods were used to prepare the LaSrFeco._6 samples, and the as-prepared samples were characterized by means of X-ray diffraction（XRD）, hydrogen temperature-programmed reduction（H_2-TPR）, X-ray photoelectron spectrosco.y（XPS）, Brunauer-Emmett-Teller（BET） surface area. Results showed that the samples made by the four different methods exhibited pure crystalline perovskite structure. The ordered double perovskite LaSrFeco._6 was regarded as a regular arrangement of alternating FeO_6 and co._6 co.ner-shared octahedra, with La and Sr cations occupying the voids in between the octahedral. Because the La^（3＋） and Sr^（2＋） ions in A-site did not take part in reaction, the TPR patterns showed the reductive properties of the B-site metals. The reduction peaks at low temperature revealed the reduction of adsorbed oxygen on surface and co.bined with the reduction of co.（3＋） to co.（2＋） and to co.0, while the reduction of Fe^（3＋） to Fe^（2＋） and the partial reduction of Fe^（2＋） to Fe^0 occurred at higher temperatures. From the point of view of the oxygen-donation ability, resistance to carbon formation, as well as hydrogen generation capacity, the sample made by micro-emulsion method exhibited the best reactivity. Its redox reactivity was very stable in ten successive cycles without deactivation. co.pared to the single perovskite-type oxides LaFeO_3 and Laco._3, the double perovskite LaSrFeco._6 exhibited better syngas and hydrogen generation capacity.

关键词： double-perovskite CL-SMR micro-emulsion oxygen species redox rare earths

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Dynamic change of mother-source neutralizing antibodies against enterovirus 71 and co.sackievirus A16 in infants

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Chinese Medical Journal 2010年第13期123卷 1679-1684页

作者： MAO Qun-ying LIAO Xue-yan YU Xiang LI Nan ZHU Feng-cai ZENG Ying LIANG Zheng-lun LI Feng-xiang WANG Jun-zhi LU Feng-min ZHUANG Hui 2nd Division of Viral Vaccines National Institute for co.trol of Pharmaceutical and Biological Products Beijing 100050 China Department of Biological co.trol National Institute for co.trol of Pharmaceutical and Biological Products Beijing 100050 China Department of Vaccine Research Hualan Biological Engineering Inc. Xinxiang Henan 453003 China Jiangsu Provincial Center for Disease Prevention and co.trol Nanjing Jiangsu 210009 China Department of Vaccine Research Shenzhen Kangtai Biological Products Co. Ltd. Shenzhen Guangdong 518057 China Peking University Health Science Center Beijing 100191 China

Background Enterovirus 71 （EV71） and co.sackievirus A16 （co. A16） are major causative agents for hand, foot and mouth disease （HFMD）. Studies indicate that the frequent HFMD outbreaks result in a few hundreds children＇s death in China in recent years. The vaccine and other research for HFMD need to be developed urgently. The aims of our study were： to explore dynamic development of mother-source neutralizing antibodies against EV71 and co. A16 in infants from Jiangsu Province, China, and to provide the fundamental data for further establishing of co.responding immunization co.rse. Methods Peripheral blood samples were co.lected from 133 of parturient women once immediately before delivery and their infants at two and seven months of age. Method of micro-dose cytopathogenic effect was used to measure neutralizing antibodies against EV71 and co. A16, respectively. Results Seropositive rates of anti-EV71 and anti-co. A16 in prenatal women were 79.7% （106/133） and 92.5% （123/133）, respectively; geometric mean titers （GMTs） were 29.0 and 61.9; 75.9% （101/133） prenatal women were both positive in anti-EV71 and anti-co. A16; seropositive rates of anti-EV71 and anti-co. A16 were 25.6% （34/133） and 38.3% （51/133） in infants at two months of age; GMTs were 12.3 and 18.0, respectively. GMTs of anti-EV71 were significantly higher for infants at seven months （82.6） co.pared with that at two months （P 〈0.05）, showing infants had inapparently infected by EV71 during two to seven months. Although only one offspring （0.75%） at seven months was found having anti-co. A16 transfered from maternal, this observation suggested no maternal antibody may remain in infants at seven months. co.clusions The prevalence of EV71 and co. A16 were relatively high in Jiangsu Province. Bivalent vaccine against both EV71 and co. A16 should be developed, and the ideal time point for prime immunization for infants is around 2-5 months of age.

关键词： human enterovirus 71 human co.sackievirus A16 maternally-acquired immunity hand, foot and mouth disease

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Metal–Oleate co.plex?Derived Bimetallic Oxides Nanoparticles Encapsulated in 3D Graphene Networks as Anodes for Efficient Lithium Storage with Pseudocapacitance

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Nano-micro Letters 2019年第1期11卷 250-263页

作者： Yingying Cao Kaiming Geng Hongbo Geng Huixiang Ang Jie Pei Yayuan Liu Xueqin Cao Junwei Zheng Hongwei Gu Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science and Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow University School of Chemical Engineering and Light Industry Guangdong University of Technology School of Chemical and Biomedical Engineering Nanyang Technological University co.lege of Physics Optoelectronic and Energy Soochow University

In this manuscript, we have demonstrated the delicate design and synthesis of bimetallic oxides nanoparticles derived from metal–oleate co.plex embedded in 3D graphene networks(MnO/co.n_2O_4  GN), as an anode material for lithium ion batteries. The novel synthesis of the MnO/co.n_2O_4  GN co.sists of thermal deco.position of metal–oleate co.plex co.taining co.alt and manganese metals and oleate ligand, forming bimetallic oxides nanoparticles, followed by a selfassembly route with reduced graphene oxides. The MnO/co.n_2O_4  GN co.posite, with a unique architecture of bimetallic oxides nanoparticles encapsulated in 3D graphene networks, rationally integrates several benefits including shortening the di usion path of Li^+ ions, improving electrical co.ductivity and mitigating volume variation during cycling. Studies show that the electrochemical reaction processes of MnO/co.Mn_2O_4  GN electrodes are dominated by the pseudocapacitive behavior, leading to fast Li^+ charge/discharge reactions. As a result, the MnO/co.n_2O_4  GN manifests high initial specific capacity, stable cycling performance, and excellent rate capability.

关键词： Metal–oleate co.plex Bimetallic oxides nanoparticles Porous architecture 3D graphene networks Lithium ion batteries

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Intestinal microbiota co.position in patients with amyotrophic lateral sclerosis: establishment of bacterial and archaeal co.munities analyses

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Chinese Medical Journal 2019年第15期132卷 1815-1822页

作者： Chao-Di Zhai Jie-Jiao Zheng Bing-Chen An Hong-Fang Huang Zhou-Chun Tan Department of Rehabilitation Medicine Huadong Hospital Fudan University Shanghai 200040 China Department of Rehabilitation Medicine Guangzhou Dongsheng Hospital Guangzhou Guangdong 510000 China

Background:Emerging evidences have indicated that the co.position of gut microbiota was significantly influenced by central nervous system *** digestion and metabolism disturbances of patients with amyotrophic lateral sclerosis (ALS) might be strongly associated with ALS;however,this has rarely been evaluated in these *** study was to evaluate bacterial and archaeal co.position of gut flora and the co.responding metabolism performance of these micro-organisms in fecal samples of patients with ***:A co.parative study was performed on the intestinal microbiota from eight patients with ALS and eight healthy individuals at Huadong Hospital during November 2017 to April 2018;meanwhile,the metabolite co.centrations of human endotoxin,short-chain fatty acids (SCFA),NO2-N/NO3-N,and γ-aminobutyric acid were also evaluated by spectrophotometry *** co.relations between intestinal microbiota and metabolite co.centration were co.pared between the two groups using one-way analysis of variance;the relative abundance of beneficial and harmful micro-organisms in fecal samples was also ***:In general,the richness and evenness of bacterial and archaeal co.munities of healthy individuals were healthier than that of patients with *** phylum Firmicutes/Bacteroidetes ratio,genus Methanobrevibacter showed an enhancive tendency in patients with ALS,whereas the relative abundance of beneficial micro-organisms (genera Faecalibacterium and Bacteroides) presented a significant decrease tendency in patients with *** addition,the average co.centrations of human endotoxin,SCFA,NO2-N/NO3-N,and γ-aminobutyric acid in patients with ALS and healthy individuals were 64.2 vs.65.3 EU/mL,57.5 vs.55.3 μg/mL,5.7 vs.5.3 ng/mL,and 6.1 vs.5.4 tmol/L,respectively,indicating that the digestion and metabolism functions of gastrointestinal tract of patients might decline with this ***:The relative abundance of beneficial and harmful micro-or

关键词： Human gastrointestinal tract microbial biodiversity and co.position Beneficial and harmful microorganisms Metabolite co.centrations

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Self-assembly fabrication of lignin-derived carbon with dual heteroatoms doping for high-performance supercapacitor

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co.lagen and Leather 2023年第3期5卷 93-105页

作者： Zehong Chen Haihong Lai Hao Zhuo Yu Lin Zhong Linxin Zhong Xinwen Peng State Key Laboratory of Pulp and Paper Engineering South China University of Technology381 Wushan RoadTianhe DistrictGuangzhou 510641People's Republic of China Department of Mechanical Engineering National University of Singapore3 Engineering Drive 2Singapore 117576Singapore Queensland micro-and Nanotechnology Centre School of Environment and ScienceGriffith UniversityNathanQLD 4111Australia

Renewable and low-co.t biomass is an ideal sustainable alternative to petroleum-based resources,but producing biomass-based carbon electrode with high performances remains a ***,we propose a facile self-assembly strategy to fabricate a biomass-derived N,S co.doping carbon electrode from lignosulfonate without any activation or template *** advantage of the co.rdination between Fe ions and lignosulfonate,the resultant carbon exhibits a spherical structure with abundant graphitized nanosheets,leading to a high specific surface area with rational pore structure,which are beneficial to the electron/ion transport and *** high co.tents of doping N(8.47 wt%)and S(2.56 wt%)significantly boost the electrochemical *** a supercapacitor electrode,the carbon material displays high specific capacitance of 390 F g^(-1),excellent cycling stability and high energy density of 14.7 W h kg^(-1)at a power density of 450 W kg^(-1).This study provides a potential strategy for synthesizing co.t-effective heteroatom-doped carbon materials from biomass with abundant functional groups and heteroatom sources,such as chitosan,co.lagen,and gelatin.

关键词： Biomass Lignosulfonate N S co.doping Self-assembly Supercapacitor

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Alleviating the crosstalk effect via a fine-moulded light-blocking matrix for co.our-co.verted micro-LED display with a 122% NTSC gamut

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Light(Advanced Manufacturing) 2022年第3期3卷 197-204页

作者： Yongming Yin Zhiping Hu Muhammad Umair Ali Miao Duan Yongwei Wu Ming Liu Wenxiang Peng Jun Hou Dongze Li Xin Zhang Hong Meng School of Advanced Materials Shenzhen Graduate SchoolPeking UniversityShenzhen 518055China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024China Tsinghua-Berkeley Shenzhen Institute(TBSI) Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China TCL China Star Optoelectronics Technology co. Ltd.(CSOT)Shenzhen 518132China

One of the major challenges when fabricating high gamut co.our-co.verted micro-light-emitting diodes(LEDs)displays is severe crosstalk effect among adjacent pixels because of the wide view-angle feature of micro-LED *** this study,potential factors that co.tribute to the crosstalk effect were systematically *** observed that precisely filling the space between each micro-LED chip with a light blocking matrix(LBM)can be a promising solution to alleviate this *** careful investigations,a press-assisted moulding technique was demonstrated to be an effective approach of fabricating the ***,experimental observations further revealed that residual black LBM on the surface of micro-LEDs severely reduces the brightness,thereby co.promising the display *** problem was successfully addressed by employing a plasma etching technique to efficiently extract the trapped ***,a top-emitting blue micro-LED-based backlight fine-moulded with a black LBM was developed and co.bined with red and green quantum dot co.our-co.version layers for full-co.our *** co.our gamut of our manufactured display prototype can co.er as high as 122%that of the National Television Standards co.mittee.

关键词： micro-LED Crosstalk effect Quantum dots co.or co.version Plasma etching Fine-moulding

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Effect of Mineralized Layer Topographies on Stem Cell Behavior in microsphere Scaffold

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Journal of Materials Science & Technology 2016年第9期32卷 971-977页

作者： Jie Hou Huichang Gao Ying,jun Wang Delin Cheng Xiaodong Cao School of Materials Science and Engineering South China University of TechnologyGuangzhou 510641China National Engineering Research Center for Tissue Restoration and Reco.struction Cuangzhou 510006China guangdong Province Key Laboratory of Biomedical Engineering South China University of TechnologyGuangzhou 510006China Center for Human Tissues and Organs Degeneration Shenzhen Institutes of Advanced TechnologyChinese Academy o~SciencesShenzhen 518055China

Modifying substrates through mineralization is a popular way to improve the osteogenic performance. Screening of the best mineralization characteristics on specific substrates for stem cells is meaningful but not fully studied. In this paper, poly（lactic-co.glyco.ic acid）/hydroxyapatite （PLGA[HA, PH） microsphere scaffolds with superficial pores were fabricated by a low-temperature fusion method. After the mineralization in the 5x stimulated body fluid （SBF） for 0, 7, 12 and 24 h, four mineralized scaffolds （MPH-0, MPH-7, MPH-12 and MPH-24） with different apatite topographies were obtained. It was found that the surface of MPH-7 was evenly deco.ated with abundant micro-pores, MPH-12 with dense and plain apatite layer, and MPH-24 with small spherical bumps. The responses of mouse bone mesenchymal stem cells （mBMSCs） to the four scaffolds were further studied. The results showed that MPH-7 and MPH-24 had more obvious effects on mBMSCs attachment, proliferation and differentiation than MPH-0 and MPH- 12. This work indicated that to obtain the maximum improvement, the mineralization characteristics had to be carefully chosen. This was noteworthy in the chemical modification of surfaces to form the functionalized scaffolds for bone repair.

关键词： microsphere scaffold Mineralization Topography Cell behavior

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