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Covalent organic framework-based nanoplatforms with tunable mechanical properties for drug delivery and cancer therapy

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Mechanobiology in Medicine 2023年第2期1卷 35-45页

作者： Liefeng Hu Yonggang Lv School of Materials Science and Engineering Wuhan Textile UniversityWuhan430200 PR China State Key Laboratory for New Textile Materials&Advanced Processing Technology Wuhan Textile UniversityWuhan430200 PR China

Covalent organic frameworks(COFs)are emerging crystalline porous materials composed of covalently linked and periodically arranged organic molecules,which exhibit mechanical properties mediated by structural ***,the tunable mechanical properties of COFs have been widely applied in drug delivery and cancer ***,we first summarize the regulation strategies of COFs with different mechanical strengths,such as structural dimensions,pore sizes,and host–guest interaction ***,the remarkable achievements of COFs with different mechanical properties in drug delivery and cancer therapy in recent years are ***,the mechanical strength regulation of COFs and the remaining challenges for biomedical applications are *** review provides a more comprehensive understanding of the application of COFs systems with tunable mechanical properties in the field of biomedicine,and promotes the development of interdisciplinary research between COFs materials and nanomedicine.

关键词： Covalent organic frameworks Mechanical properties Drug delivery Cancer therapy Nanomedicine

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Smart design A_(2)Zr_(2)O_(7)-type high-entropy oxides through lattice-engineering toughening strategy

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npj Computational materials 2024年第1期10卷 249-258页

作者： Ying Zhang Ke Ren William Yi Wang Xingyu Gao Jun Wang Yiguang Wang Haifeng Song Xiubing Liang Jinshan Li State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’anShaanxiChina Innovation Center NPU ChongqingChongqingChina Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijingChina Laboratory of Computational Physics Institute of Applied Physics and Computational MathematicsBeijingChina Defense Innovation Institute Academy of Military Sciences of the PLA of ChinaBeijingChina

The fracture toughness(KIC)of high-entropy oxides(HEOs)is critically important for several applications,but identification and quantification of the toughening mechanisms resulting from latticeengineering/distortion in HEOs is ***,based on the classic Griffith criteria,a physicsdriven theoretical equation combined with a knowledge-enabled data-driven machine-learning algorithm is proposed to predict the KIC and elucidate the toughening mechanisms of A_(2)Zr_(2)O_(7)-type *** with experimental verification,our proposed model is applied to a dataset comprising 41208(nRE1/n)_(2)Zr_(2)O_(7)(n=2~7)HEOs,considering the contributions of the intrinsic brittleness and increased toughness due to the local lattice distortion(LLD),thereby addressing the challenge of accurate estimating KIC in complex HEOs using the rule of *** crack tip propagation,the interaction mechanism of cations induces stress fields and charge variations of LLD and dissipates crack energy,thus,to yield the crack tip softening and the elastic shielding and to enhance the toughness of HEOs.

关键词： toughness crack lattice

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In situ STEM Observation of Cation Diffusion and Surface Reconstruction at van der Waals Gaps

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Microscopy and microanalysis : the official journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada 2023年第1期29卷 1642-1643页

作者： Cui, Wenjun Lin, Weixiao Lu, Weichao Liu, Chengshan Gao, Zhixiao Ma, Hao Zhao, Wen Van Tendeloo, Gustaaf Sang, Xiahan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China Nanostructure Research Center Wuhan University of Technology Wuhan China School of Materials Science and Engineering China University of Petroleum (East China) Qingdao Shandong China Electron Microscopy for Materials Science (EMAT) University of Antwerp Antwerp Belgium

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Highly Flexible Graphene-Film-Based Rectenna for Wireless Energy Harvesting

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Energy & Environmental materials 2024年第2期7卷 320-325页

作者： Jingwei Zhang Yuchao Wang Rongguo Song Zongkui Kou Daping He Hubei Engineering Research Center of RF-Microwave Technology and Application School of ScienceWuhan University of TechnologyWuhan 430070China Sanya Science and Education Innovation Park of Wuhan University of Technology Sanya 572000China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Herein,we report the design,fabrication,and performance of two wireless energy harvesting devices based on highly flexible graphene macroscopic films(FGMFs).We first demonstrate that benefiting from the high conductivity of up to 1×10^(6)S m^(-1)and good resistive stability of FGMFs even under extensive bending,the FGMFs-based rectifying circuit(GRC)exhibits good flexibility and RF-to-DC efficiency of 53%at 2.1 ***,we further expand the application of FGMFs to a flexible wideband monopole rectenna and a 2.45 GHz wearable rectenna for harvesting wireless *** wideband rectenna at various bending conditions produces a maximum conversion efficiency of 52%,46%,and 44%at the 5th Generation(5G)2.1 GHz,Industrial Long-Term Evolution(LTE)2.3 GHz,and Scientific Medical(ISM)2.45 GHz,respectively.A 2.45 GHz GRC is optimized and integrated with an AMC-backed wearable *** proposed 2.45 GHz wearable rectenna shows a maximum conversion efficiency of 55.7%.All the results indicate that the highly flexible graphene-film-based rectennas have great potential as a wireless power supplier for smart Internet of Things(loT)applications.

关键词： flexible rectennas highly flexible graphene-based films wireless energy harvesting

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Hybrid coating SnO_(2)for enhanced Li ions storage

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Chinese Chemical Letters 2023年第12期34卷 396-400页

作者： Yanan Gao Jie Liu Chenjie Lou Hailiang Geng Jipeng Fu Chengyu Li Yongjin Chen Cong Wang Wenda Zhang Xiaojun Kuang Yifan Liu Xiang Gao Mingxue Tang School of Physical Science and Technology Inner Mongolia UniversityHohhot 010000China Center for High Pressure Science and Technology Advanced Research Beijing 100193China Key Laboratory of Rare Earth Optoelectronic Materials and Devices of Zhejiang Province Institute of Optoelectronic Materials and DevicesHangzhou 310018China College of Mathematics and Physics Bejing University of Chemical TechnologyBejing 100029China MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials Guangxi Key Laboratory of Optic and Electronic Materials and DevicesCollege of MaterialsGuilin 541100China

Anode SnO_(2)in lithium-ion batteries suffers from volume expansion and ***,the SnO_(2)nanoparticles are hybrided with ZrO_(2)particles by the support of carbon nanotube *** obtained SnO_(2)/C/ZrO_(2)composite shows improved electrochemical *** reveal that the carbon nanotubes shorten the transmission path of electrons and Li^(+) *** milling with ZrO_(2)promotes the formation of nanosized SnO_(2)to weaken the internal strain change,being beneficial to buffering volume change during electrochemical cycling ***-resolution 6.7Li NMR investigations indicate that conversion and alloying reactions are stepwise involved for SnO_(2)/C/ZrO_(2)*** strategy of designing SnO_(2)/C/ZrO_(2)composite from the morphology-controlled metal-organic frameworks for energy storage widens the possibility to fabricate promising materials with enhanced performances.

关键词： Hybrid regulation Lithium-ion batteries Fast migration Volume confinement Energy storage

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Effect of Cr_(2)O_(3) nanosheet insertion on the deuterium permeation behavior of a Cr-Zr-O coating

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Plasma Science and technology 2022年第12期24卷 191-198页

作者： Xinluo TIAN Heping LI Liyu ZHENG Fangjian LI Zhongyang ZHENG Shengming YIN Xinyun WANG Youwei YAN State Key Laboratory of Materials Processing and Die&Mould Technology International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma PhysicsSchool of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074People's Republic of China

In this study,a Cr_(2)O_(3) nanosheet(Cr_(2)O_(3) NS)inserted Cr-Zr-O coating was developed as a hydrogen isotope permeation *** Cr_(2)O_(3) NSs,fabricated by rapid heat treatment,were amorphous with a thickness of only several *** Cr_(2)O_(3) NSs were then incorporated into a Cr-Zr-O multi-metal oxide composite coating via a dip-coating method to form a *** effect of the Cr_(2)O_(3) NS concentration on the morphology,microstructure and deuterium permeation resistance of the coating was *** the addition of 1.0 g 1^(-1)Cr_(2)O_(3) NSs,compared with the Cr-Zr-O coating without NSs,the permeation reduction factor of the resultant coating was enhanced from 249℃to 575℃ at 500℃.The coating,with a thickness of nearly 193 nm,achieved a comparable deuterium resistance that was above two orders of magnitude higher than the steel *** results show that ceramic NSs can serve as effective fillers for enhancing the coating performance when functioning as a hydrogen isotope barrier.

关键词： deuterium permeation barrier ceramic coatings nanosheets

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Formation of Oolitic Layer in Green Sand under Heat Effect 75

Formation of Oolitic Layer in Green Sand under Heat Effect

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75th World Foundry Congress, WFC 2024

作者： Qi, Yuyang He, Zefen Peng, Xin Yin, Yajun Ji, Xiaoyuan Li, Yuancai Zhou, Jianxin State Key Laboratory of Materials Processing and Die & Mould Technology Huazhong University of Science & Technology Wuhan China Jiangsu Sud-Chemie Chemical Materials Co. Ltd. Jiangsu China

The green sand is repeatedly heated during casting, and the failed clay binder deposits and accumulates to form an oolitic layer, which affects the performance and regeneration of the molding sand. To study the formation mechanism of the oolitic layer, bentonite was mixed with sands and fully reacted at high temperatures ranging from 500℃ to 1000℃. The transformation process of bentonite forming a oolitic layer on the surface of sands was investigated using analysis methods such as TG/DTG, FTIR, and XPS. The results indicate that at temperatures above 600℃, the crystal structure of bentonite begins to be disrupted, and some form chemical bonds with sands, beginning to deposit and form a oolitic layer. Compared with the used sands, the oolitic sands have the same surface functional groups and similar composition, both formed by high-temperature deposition of bentonite. The oolitic layer is a mixture of glassy material, SiO2, Al2O3, Fe2O3, etc. © 2024 75th World Foundry Congress, WFC 2024. All rights reserved.

关键词： Bentonite

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Activity promotion of Rh_(1)Ca_(x)/Al_(2)O_(3) single-atom catalyst in 1-octene hydroformylation:a volcano curve exists between Ca adding ratio and catalytic activity

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Science China Chemistry 2024年第4期67卷 1187-1192页

作者： Hao Zhang Xingcong Zhang Xilun Wang Qingdi Sun Hao Liu Hongbing Ji Xiaohui He Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education Fine Chemical Industry Research InstituteSchool of ChemistryIGCMESun Yat-sen UniversityGuangzhou 510275China Huizhou Research Institute Sun Yat-sen UniversityHuizhou 516081China State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology Institute of Green Petroleum Processing and Light Hydrocarbon ConversionCollege of Chemical EngineeringZhejiang University of TechnologyHangzhou 310014China

Single-atom catalysts(SACs)are considered the best candidates for olefin hydroformylation due to their combined advantages of homogeneous and heterogeneous *** conventional organo-phosphine modification,Rh SAC is modified by introducing Ca,resulting in a significant increase in activity(maximum~5.7-fold)and ***,a volcano curve between Ca addition ratio and catalytic activity is *** Ca significantly increases activity by decreasing the energy barrier,but excessive Ca decreases activity due to hindering substrate adsorption and reaction.

关键词： hydroformylation bimetallic single-atom catalysts rhodium heterogeneous catalyst

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Effects of Thermal Aging on Microstructure and Mechanical Properties of Interface of Hot Isostatic Pressing Densified Low Alloy Steel with Inconel 690 Cladding

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稀有金属材料与工程 2025年第4期54卷 879-885页

作者： Yu Lei Cao Rui Ma Jinyuan Yan Yingjie Dong Hao Wang Caiqin State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of TechnologyLanzhou 730050China School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050China Advanced Technology&Materials Co. LtdBeijing 100081China Hebei Hot Isostatic Pressing Technology Innovation Center Zhuozhou 072750China

The microstructure,micro-hardness,and tensile properties of interface between hot isostatic pressing densified low alloy steel and Inconel 690 cladding were investigated during the aging process at 600℃.The results show that the interface region can be divided into four zones from base metal to deposited metal:carbon-depleted zone(CDZ),partial melting zone(PMZ),planar growth zone(PGZ),and brownish feature zone(BFZ).Dimensions of these zones do not significantly change during ***,type I carbides noticeably increase in size in the PMZ,and precipitates clearly occur in the *** main reason for their growth and occurrence is continuous carbon *** highest micro-hardness appears in the PGZ and BFZ regions,which is related to carbon accumulation and precipitates in these *** failure occurs on the base metal side due to the high strength mismatch between these two *** CDZ,composed of only ferrite,has lower strength and fractures at the boundary between CDZ and base *** ultimate tensile strength decreases by only 50 MPa after aging for 1500 h,and the interface region maintains high strength without significant deformation.

关键词： interface thermal aging microstructure mechanical properties hot isostatic pressing densification

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An intrinsically self-healing and anti-freezing molecular chains induced polyacrylamide-based hydrogel electrolytes for zinc manganese dioxide batteries

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Journal of Energy Chemistry 2024年第2期89卷 565-578,I0013页

作者： Haiyang Liao Wenzhao Zhong Chen Li Jieling Han Xiao Sun Xinhui Xia Ting Li Abolhassan Noori Mir F.Mousavi Xin Liu Yongqi Zhang Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 611731SichuanChina School of Mechanical Engineering Hunan University of TechnologyZhuzhou 412007HunanChina School of Materials Science and Engineering Zhejiang University of TechnologyHangzhou 310014ZhejiangChina Department of Chemistry Faculty of Basic SciencesTarbiat Modares UniversityTehran 14117-13116Iran State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200HubeiChina

The anti-freezing strategy of hydrogels and their self-healing structure are often contradictory,it is vital to break through the molecular structure to design and construct hydrogels with intrinsic anti-freezing/self-healing for meeting the rapid development of flexible and wearable devices in diverse service ***,we design a new hydrogel electrolyte(AF/SH-Hydrogel)with intrinsic anti-freezing/self-healing capabilities by introducing ethylene glycol molecules,dynamic chemical bonding(disulfide bond),and supramolecular interaction(multi-hydrogen bond)into the polyacrylamide molecular *** to the exceptional freeze resistance(84%capacity retention at-20℃)and intrinsic self-healing capabilities(95%capacity retention after 5 cutting/self-healing cycles),the obtained AF/SH-Hydrogel makes the zinc||manganese dioxide cell an economically feasible battery for the state-of-the-art *** Zn||AF/SH-Hydrogel||MnO_(2)device offers a near-theoretical specific capacity of 285 m A h g^(-1)at 0.1 A g^(-1)(Coulombic efficiency≈100%),as well as good self-healing capability and mechanical flexibility in an ice *** work provides insight that can be utilized to develop multifunctional hydrogel electrolytes for application in next generation of self-healable and freeze-resistance smart aqueous energy storage devices.

关键词： Flexible aqueous battery Hydrogel electrolyte Anti-freezing Self-healing Dual-dynamic reversible bond

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