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Red/NIR emission carbonized polymer dots based on citric acid-benzoylurea and their application in lymph nodes imaging

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Chinese Chemical Letters 2023年第11期34卷 225-230页

作者： Feishi Shan Tingrui Zhang Chengshuang Liao Xue Yue Jing Zhang Li Yan Yanman Liu Zhixing Cao Min Wang Yahui Zhang Leyong Wang Zhouyu Wang Xiaoqi Yu Sichuan Engineering Research Center for Molecular Targeted Diagnostic&Therapeutic Drugs Asymmetric Synthesis and Chiral Technology Key Laboratory of Sichuan ProvinceResearch and Application of Small Organic Chiral Molecules Key Laboratory of Yibin CityDepartment of ChemistryXihua UniversityChengdu 610039China State Key Laboratory of Southwestern Chinese Medicine Resources Pharmacy SchoolChengdu University of Traditional Chinese MedicineChengdu 611137China State Key Laboratory of Analytical Chemistry for Life Science Key Laboratory of Mesoscopic Chemistry of MOEJiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Identification of lymph nodes(LNs)is critical for studies of the structure,the role in disease development,and the efficacy of disease *** polymer dots(CPDs)are expected to be potential LNs-targeted imaging agents due to their excellent properties with special structure,better photoluminescence(PL)and great ***,a red/near infrared(NIR)emission CPDs(RCPDs)with one and two-photon bioimaging based on citric acid(CA)and benzoylurea(BU)are ***,the RCPDs are capable of targeting LNs for *** homing has been demonstrated to be the cellular mechanism of RCPDs target LNs *** work has developed a new nanomaterial for targeted imaging of LNs,while the biological applications of CPDs have been expanded and deepened.

关键词： Carbonized polymer dots Red/NIR emission LNs-targeting Lymphocyte homing

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Flame-retardant Cotton Fabric based on Electrostatic Layer-by-layer Assembly of Vermiculite 16

Flame-retardant Cotton Fabric based on Electrostatic Layer-b...

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16th Textile Bioengineering and Informatics Symposium, TBIS 2023

作者： Cheng, Hong-Bin Liu, Xiao-Shu Xiao, Shi-Li School of Textile Science and Engineering Wuhan Textile University Wuhan430200 China State Key Laboratory of New Textile Materials & Advanced Processing Technology Wuhan430200 China

ISBN: (纸本)9781713879473

Flame-retardant cotton fabric, in clothing and decoration, can reduce the damage in a fire. This study reports a facile way to prepare vermiculite-assembled cotton fabrics using layer by layer assemble technique. The vermiculite-assembled cotton fabrics synthesized are characterized by SEM, FTIR, Instron and a vertical inflammability test. The results show that vermiculite assembled on cotton fabrics could improve the mechanical property and endow the fabric with the good flame-retardant property. © TBIS 2023. All rights reserved.

关键词： Cotton fabrics

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High-pressure Sintering of Boron Carbide-Titanium Diboride Composites and Its Densification Mechanism

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Journal of Wuhan University of technology(materials Science) 2020年第2期35卷 356-362页

作者： GAO Jiancheng WANG Dangqiang LEI Liwen ZHANG Fan ZHANG Jinyong FU Zhengyi State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

A high-pressure hot-pressing process was applied to densify a commercial boron carbide-titanium diboride (B4C-TiB2) powder *** fully dense (98.6%) materials were obtained at 1700℃ under a pressure of *** to the sintering temperature required to achieve similar results when a pressure of only 30MPa was applied,the sintering temperature was found to decrease by about 200℃ under pressure of 100 *** of the thermodynamics and microstructure showed that the plastic deformation of the B4C grains induced by high pressure dominated the densification mechanism when high pressure was ***,higher pressure resulted in remarkably improved mechanical properties of the composites,which could be traced back to the generation of stacking faults in the B4C grains and aggregation of TiB2.

关键词： hot-pressing high-pressure sintering densification TiB2-B4C

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Magnetic field-enhanced photoelectrochemical water splitting of Co_(3)O_(4)/TiO_(2)for efficient oxygen evolution

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Science China materials 2024年第10期67卷 3168-3175页

作者： Ze-En Zhou Yi Lu Yi-Xuan Liu Shang Cao Ge Tian Zhi-Yi Hu Ling Shen Si-Ming Wu Jie Ying Wei Geng Xiao-Yu Yang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing&Shenzhen Research Institute&Laoshan Laboratory Wuhan University of TechnologyWuhan 430070China National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies Foshan Xianhu LaboratoryFoshan 528200China Nanostructure Research Centre(NRC) Wuhan University of TechnologyWuhan 430070China School of Chemical Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China

Effective separation of photogenerated carriers plays a vital role in governing the efficiency of photo-electrocatalytic ***,the advancement in enhancing the intrinsic carrier separation efficiency of semiconductors has shown limited ***,we reported the use of a magnetic field to improve the photoelectrochemical water splitting of a magnetic Co_(3)O_(4)/TiO_(2)photoanode by boosting the photogenerated carrier separation *** the presence of the magnetic field,oxygen evolution reaction occurs with a high photocurrent density of 0.86 mA cm^(−2)at 1.23 V versus VRHE,and an applied bias photon-to-current efficiency of 0.342%at 0.61 ***,the photoanode maintains its oxygen evolution reaction for more than 400 h with photocurrent decays by ca.10%.Observations made in this effort show that the enhancement of photo-electrocatalytic efficiency by a magnetic field is a consequence of the effect of the Lorentz force generated by the magnetic field on photogenerated carriers and ions near the Co_(3)O_(4)/TiO_(2)photoanode,which improves the carrier separation efficiency and the bubble release *** results suggest that manipulating photoelectrode carriers by using a magnetic field is a promising strategy to design high-performance photoelectrochemical for water splitting.

关键词： photoelectrochemical water splitting Co_(3)O_(4)/TiO_(2) carrier separation efficiency stability

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Mo_(2)C催化的低压纳米Li_(2)C_(2)O_(4)预锂化用于高能量锂离子电池

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Science China materials 2023年第3期66卷 903-912页

作者：钟伟张策李思吾张薇曾子琪程时杰谢佳 State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430000China State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

初始循环中不可逆的锂损失显著降低了锂离子电池的能量密度预锂化是补偿锂损失的有效方法之一,但目前的方法存在预锂化试剂不稳定或容量低的问题.草酸锂(Li_(2)C_(2)O_(4))作为一种高理论容量(相当于锂金属)、低成本和空气稳定的锂补偿... 详细信息

初始循环中不可逆的锂损失显著降低了锂离子电池的能量密度预锂化是补偿锂损失的有效方法之一,但目前的方法存在预锂化试剂不稳定或容量低的问题.草酸锂(Li_(2)C_(2)O_(4))作为一种高理论容量(相当于锂金属)、低成本和空气稳定的锂补偿材料已显示出巨大的潜力.然而低电化学活性和高分解电位严重阻碍了其实际应用.本文中,我们报道了一种低压预锂化技术.通过配合使用Mo_(2)C催化剂和纳米Li_(2)C_(2)O_(4)Mo_(2)C催化剂改变了Li_(2)C_(2)O_(4)周围的电子云分布,大大降低了活化能,从而显著加速了锂从Li_(2)C_(2)O_(4)中的释放.通过冷冻干燥制备的纳米Li_(2)C_(2)O_(4)与Mo_(2)C催化剂形成良好接触并展现出快速的离子和电子传导.得益于这种协同效应,Li_(2)C_(2)O_(4)的分解电位降低了0.5 V,分解效率接近100%.纳米Li_(2)C_(2)O_(4)/Mo_(2)C复合材料补偿的LiCoO_(2)||SiO全电池展现出可以高于对照组46.9%的比容量,显示出巨大的实际应用潜力.

关键词：锂离子电池理论容量预锂化电化学活性分解电位全电池电子传导能量密度

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Spallation Damage Mechanisms and Microstructural Evolution in Selective Laser Melted Ti-6al-4v Under Quasi-Isentropic Loading

SSRN

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SSRN 2024年

作者： Zhang, Kaichang Li, Peibo Zhang, Yang Sun, Yi Luo, Guoqiang Shen, Qiang Hubei Longzhong Laboratory Hubei Xiangyang441000 China State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

The microstructure of additively manufactured Ti-6Al-4V significantly differs from that of traditional casting processes, and this microstructural variation directly impacts the material's mechanical properties. To ensure the safety and stability of additively manufactured Ti-6Al-4V in practical applications, this study achieves controlled dynamic loading by optimizing the cross-sectional surface density of the structural gradient flyer(SGFs). It further explores material response characteristics under varying stress and strain rates by adjusting the loading rate in spallation experiments. The initial microstructure of Ti-6Al-4V produced via selective laser melting (SLM) was investigated and analyzed. Quasi-isentropic loading experiments were conducted on 6 mm thick samples at strain rates ranging from 5.07 to 12.38 × 104 s-1. The results demonstrate that, in comparison to as-cast alloys, the SLM-processed Ti-6Al-4V alloys exhibit reduced plasticity, primarily attributed to the higher cooling rates of SLM. The alloys predominantly display brittle fracture characteristics, with distinct transgranular fracture patterns. As the loading strain rate increases, the pulse width of the loading waveform progressively narrows, spall strength markedly rises, and cracks not only propagate but also enlarge. Grain refinement was evident in both the crack extension region and along the edges, accompanied by localized stress concentration, yet no signs of recrystallization were detected. The spall strength of the material exhibited heightened sensitivity to impact stresses relative to plate impact conditions. These findings offer critical theoretical insights into the potential applications of additively manufactured titanium alloys, particularly in aerospace and defense sectors. © 2024, The Authors. All rights reserved.

关键词： Grain refinement

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High-Performance Flexible Magnetic Textile Fabricated Using Porous Juncus effusus Fiber for Biomechanical Energy Harvesting

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Engineering 2025年第3期46卷 267-277页

作者： Junyao Gong Chunhua Zhang Liangjun Xia Zhaozixuan Zhou Weihao Long Zhuan Fu Sijie Zhou Hua Ji Lixin Du Weilin Xu State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China College of Textile Science and Engineering Zhejiang University of Science and TechnologyHangzhou 310018China College of Textiles Donghua UniversityShanghai 201620China Winner Medical Co. Ltd.Wuhan 430200China Luthai Textile Co. Ltd.Zibo 255100China

Mechanical energy produced by human motion is ubiquitous,continuous,and usually not utilized,making it an attractive target for sustainable electricity-harvesting *** this study,flexible magnetic-Juncus effusus(M-JE)fibers were prepared from plant-extracted three-dimensional porous Juncus effusus(JE)fibers decorated with polyurethane and magnetic *** M-JE fibers were woven into fabrics and used for mechanical energy harvesting through electromagnetic *** M-JE fabric and induction coil,attached to the human wrist and waist,yielded continuous and stable voltage(2 V)and current(3 mA)during *** proposed M-JE fabric energy harvester exhibited good energy harvesting potential and was capable of quickly charging commercial capacitors to power small electronic *** proposed M-JE fabric exhibited good mechanical energy harvesting performance,paving the way for the use of natural plant fibers in energy-harvesting fabrics.

关键词： Juncus effusus Magnetic fabrics Electromagnetic induction Energy harvest Mechanical-electrical energy conversion

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Ductile-Brittle Transition Mechanism of Highly-Oriented 3c-Sic in Elid

SSRN

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SSRN 2024年

作者： Li, Hengyi Xu, Qingfang Zhang, Chitengfei Yang, Meijun Tu, Rong Zhang, Song Hubei Longzhong laboratory Xiangyang441000 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Wuhan University of Technology China

Compared with sintered silicon carbides (SiC), highly-orientated 3C-SiC by CVD methods boasts out-of-plane orientation uniformity, which ensures that such materials produce lower surface damage. Through the ELID grinding technique, the differences in grinding behaviors between and -orientated 3C-SiC were investigated. Both highly-orientated 3C-SiC exhibited a grinding surface where brittle and ductile removal coexisted. Specifically, brittle removal regions were observed at grain boundaries, while ductile removal regions were observed within the grains. Further indentation experiments between the two 3C-SiC show that -oriented 3C-SiC displayed a larger critical cut depth of 28.99 nm, with 1.5 times higher than that of -oriented 3C-SiC. The larger critical depth of cut contributes to more ductile removal regions with only a few brittle pits in the -oriented 3C-SiC grinding surface. In addition, the subsurface deformation of -oriented 3C-SiC was characterized by the presence of amorphous zones, dislocations and stacking faults. In contrast to the -oriented, the -oriented 3C-SiC tends to exhibit a brittle removal mode dominated by pits and cracks at the twin boundaries, as its pre-existing twins hinder the dislocation glide, resulting in stress concentration and thus forming cracks. © 2024, The Authors. All rights reserved.

关键词： Silicon carbide

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Awakening the oxygen evolution activity of MoS_(2) by oxophilic-metal induced surface reorganization engineering

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Journal of Energy Chemistry 2021年第11期30卷 546-551,I0013页

作者： Xueqin Mu Yang Zhu Xiangyao Gu Shipeng Dai Qixin Mao Lintao Bao Wenxuan Li Suli Liu Jianchun Bao Shichun Mu Jiangsu Key Laboratory of Biofunctional Materials School of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023JiangsuChina Key Laboratory of Advanced Functional Materials of Nanjing Nanjing Xiaozhuang UniversityNanjing 211171JiangsuChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu hydrogen ValleyFoshan 528200GuangdongChina

Although molybdenum disulfide (MoS_(2))-based materials are generally known as active electrocatalysts for the hydrogen evolution reaction (HER), the inert performance for the oxygen evolution reaction (OER) seriously limits their wide applications in alkaline electrolyzers due to there exists too strong metal-sulfur (M−S) bond in MoS_(2). Herein, by means of surface reorganization engineering of bimetal Al, Co-doped MoS_(2) (devoted as AlCo_(3)-MoS_(2)) through in situ substituting partial oxidation, we successfully significantly activate the OER activity of MoS_(2), which affords a considerably low overpotential of 323 mV at −30 mA cm^(−2), far lower than those of MoS_(2), Al-MoS_(2) and Co-MoS_(2) catalysts. Essentially, the AlCo_(3)-MoS_(2) substrate produces lots of M−O (M=Al, Co and Mo) species with oxygen vacancies, which trigger the surface self-reconstruction of pre-catalysts and simultaneously boost the electrocatalytic OER activity. Moreover, benefiting from the moderate M−O species formed on the surface, the redistribution of surface electron states is induced, thus optimizing the adsorption of OH* and OOH* intermediates on metal oxyhydroxides and awakening the OER activity of MoS_(2).

关键词： Surface reorganization engineering Porous nanosheets Oxygen evolution reaction MoS_(2) Oxophilic-metal

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Recent progress of Ga_(2)O_(3)materials and devices based on the low-cost,vacuum-free Mist-CVD epitaxial growth method

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Fundamental Research 2024年第5期4卷 1292-1305页

作者： Zeyulin Zhang Pengru Yan Qingwen Song Haifeng Chen Wentao Zhang Hao Yuan Fengyu Du Dinghe Liu Dazheng Chen Yuming Zhang Wide Bandgap Semiconductor Technology Disciplines State Key Laboratory School of MicroelectronicsXidian UniversityXi'an 710071China Xidian-Wuhu Research Institute Wuhu 241000China Key Laboratory of Advanced Semiconductor Devices and Materials School of Electronic EngineeringXi'an University of Posts and TelecommunicationsXi'an 710121China Guangxi Key Laboratory of Optoelectronic Information Processing School of Optoelectronic EngineeringGuilin University of Electronic TechnologyGuilin541004China

Compared with silicon,gallium nitride,silicon carbide,and other traditional semiconductors,gallium oxide(Ga_(2)O_(3))who possesses,an ultrawide bandgap of approximately 5.0 eV and a higher breakdown field strength of approximately 8 MV/cm has attracted increasing attention from researchers,especially for the potential application in power ***,Ga_(2)O_(3)material has natural ultraviolet detection ability for photodetectors due to its ultrawide *** future commercial applications put forward an urgent require for high-quality epitaxial Ga_(2)O_(3)material in an efficient growth method at a lower *** there are some conventional methods for single crystal Ga_(2)O_(3)film epitaxial growth such as MBE and MOCVD,these methods always need a vacuum growth environment and expensive *** a fast-growing method,Mist-CVD gives the growth of Ga_(2)O_(3)in a vacuum-free,process-simple,and low-cost method,which will greatly reduce the cost and facilitate the development of Ga_(2)O_(3).This review has summarizes the Mist-CVD epitaxy growth mechanism of Ga_(2)O_(3),recent progress in the Ga_(2)O_(3)film epitaxial growth,and various device properties based on the Mist-CVD *** work aims to provide help for the development of Ga_(2)O_(3)material growth and device applications.

关键词： Gallium oxide Epitaxy growth Mist-CVD Single crystals Gallium oxide devices

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