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Simple chemical synthesis and isotropic negative thermal expansion in MHfF_(6)(M=Ca,Mn,Fe,and Co)

Nano Research 2024年第3期17卷 2195-2203页

作者： Yongqiang Qiao Sen Zhang Peixian Zhang Juan Guo Andrea Sanson Xi Zhen Kaiyue Zhao Qilong Gao Jun Chen Key Laboratory of Materials Physics of Ministry of Education and School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China Department of Physics and Astronomy University of PadovaPadova I-35131Italy Beijing Advanced Innovation Center for Materials Genome Engineering Department of Physical ChemistryUniversity of Science and Technology BeijingBeijing 100083China

The rapid progress of modern technologies has accelerated the prominence of thermal expansion mismatch between materials,and tunable thermal expansion materials will be a powerful safeguard against this ***,isotropic MHfF_(6)(M=Ca,Mn,Fe,and Co)compounds with tunable thermal expansion have been produced via a low-cost synthetic method and *** utilizing temperature dependent X-ray diffraction(XRD)and Raman spectroscopy,combined with first principles calculations,it was revealed that the transverse thermal vibrations of the F atoms are dominated by low-frequency phonons with negative Grüneisen parameters and are therefore the origin of the negative thermal expansion(NTE).Very interestingly,with the increase of the M atomic number,the metal…F atomic linkages become stiffer,reducing the number of vibrational modes with negative Grüneisen parameters,so that the strong NTE can be gradually adjusted to moderate NTE and to near zero thermal *** present study achieves the tunable thermal expansion in a new compound family and shed light on the internal mechanism from the perspective of lattice vibrational dynamics.

关键词： negative thermal expansion fluorides chemical synthesis nanosheet structure first principles calculations

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Plasma spray coating on interconnector toward promoted solid oxide fuel cells and solid oxide electrolysis cells

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Frontiers in Energy 2024年第3期18卷 390-398页

作者： Junwen CAO Yun ZHENG Wenqiang ZHANG Bo YU Institute of Nuclear and New Energy Technology(INET) Collaborative Innovation Center of Advanced Nuclear Energy TechnologyTsinghua UniversityBeijing 100084China Department of Chemical Engineering University of WaterlooWaterlooOntario N2L 3G1Canada Institute of New Energy Materials and Engineering School of Materials Science and EngineeringFuzhou UniversityFuzhou 350108China

Interconnector is a critical component to construct solid oxide cells (SOCs) stack. Oxidation of metallic interconnectors and Cr poisoning caused by oxidation are important factors that lead to long-term performance degradation of SOCs. Coating on the interconnector surface is an important approach to inhibit the oxidation and Cr migration of the interconnector. Herein, (La0.75Sr0.25)0.95MnO3–δ (LSM) and Mn1.5Co1.5O4 (MCO) are used to fabricate the coatings of interconnector. Two advanced thermal spray technology, atmospheric plasma spraying (APS) and low-pressure plasma spray (LPPS), are adopted for the coating preparation. The electrochemical performance, rising and cooling cycle stability, and Cr diffusion inhibition performance of the coatings are tested and evaluated. The result indicates that MCO can generate more uniform and denser coatings than LSM. In addition, MCO coatings prepared by LPPS shows the best electrochemical performance, rising and cooling cycle stability, and Cr diffusion inhibition. The initial area specific resistance (ASR) is 0.0027 Ω·cm2 at 800 °C. After 4 cooling cycle tests, the ASR increases to 0.0032 Ω·cm2 but lower than other samples. Meanwhile, the relative intense of Cr at the interface of SUS430 with MCO coatings fabricated by LPPS is lower than that of MCO fabricated by APS after 4 rising and cooling cycle operations, showing more favorable Cr diffusion inhibition performance.

关键词： interconnector coating plasma spray electrochemical performance Cr diffusion inhibition solid oxide cells(SOCs)

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Lateral strain tailoring in manganite homostructures assisted by atomic-flat freestanding membranes

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Nano Research 2023年第5期16卷 7829-7836页

作者： Yufei Wang Yuchen Zhu Shengru Chen Dongke Rong Qiao Jin Er-Jia Guo College of Materials Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China Department of Physics&Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Complex oxide thin films exhibit intriguing phenomena due to the coupling between multiple degrees of freedom through interfacial structural *** tailoring of structural parameters determines unique band structure and phonon modes,regulating emergent magnetic and electrical properties of oxide ***,the construction of different strained and oriented domains in one intact oxide thin film is impossible using conventional *** we report the fabrication and quantitative structural analysis of La_(0.7)Sr_(0.3)MnO_(3)(LSMO)homostructures assisted by atomic-flat freestanding *** substrates and suspended membranes regulate the epitaxial strain and orientation of subsequently grown *** results demonstrate an ultrathin transition layer(~4 atomic layers)between freestanding membranes and LSMO films is formed due to the strain *** work offers a simple and scalable methodology for fabricating unprecedented innovative functional oxide homostructures through artificially controlled synthesis routes.

关键词： transmission electron microscopy oxide homostructure freestanding membranes manganites strain engineering

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Black tantalic oxide submicro-particles coating on PEEK fibers woven into fabrics as artificial ligaments with photothermal antibacterial effect and osteogenic activity for promoting ligament-bone healing

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Journal of materials science & technology 2023年第2期133卷 195-208页

作者： Fan Wang Mengyao Wang Qingsong He Xuehong Wang Ping Sun Yinjun Ji Yunfei Niu Fengqian Li Jie Wei Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and EngineeringKey Laboratory for Ultrafine Materials of Ministry of EducationEast China University of Science and TechnologyShanghai 200237China Department of Orthopaedics Shanghai Eighth People’s HospitalShanghai 200235China Department of Orthopaedics Changhai HospitalSecond Military Medical UniversityShanghai 200433China

Design of artificial ligaments possessing both osteogenic activity and antibacterial effect that promotes ligament-bone healing and prevents bacterial infection in bone tunnels for anterior cruciate ligament(ACL)reconstruction remains a significant *** this study,black tantalic oxide(BTO)submicro-particles with oxygen vacancies and structure defects were fabricated by using traditional white tan-talic oxide(WTO)through magnesium thermal reduction(MTR)method,and BTO was coated on polyetheretherketone(PEEK)fibers(PKF),which were woven into fabrics(PBT)as artificial *** with BTO coating exhibited excellent photothermal performance,which possessed not only antibac-terial effects in vitro but also anti-infective ability in *** with optimized surface properties(e.g.,submicro-topography and hydrophilicity)not only significantly facilitated rat bone mesenchymal stem cells(BMSC)responses(e.g.,proliferation and osteogenic differentiation)in vitro but also stimulated new bone formation for ligament-bone healing in *** presence of oxygen vacancies and structure de-fects in BTO did not change the surface properties and osteogenic activity of BPT while displaying an outstanding photothermal antibacterial *** summary,BPT with osteogenic activity and photother-mal antibacterial effect promoted bone regeneration and prevented bacterial infection,thereby promoting ligament-bone ***,PBT would have tremendous potential as a novel artificial ligament for ACL reconstruction.

关键词： Black tantalic oxide PEEK fibers Artificial ligament Photothermal antibacterial effects Ligament-bone healing

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Effect of graphene oxide on the corrosion,mechanical and biological properties of Mg-based nanocomposite

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International Journal of Minerals,Metallurgy and materials 2022年第2期29卷 305-319页

作者： Saeid Jabbarzare Hamid Reza Bakhsheshi-Rad Amir Abbas Nourbakhsh Tahmineh Ahmadi Filippo Berto Department of Materials Science Shahreza BranchIslamic Azad UniversityShahrezaIran Advanced Materials Research Center Department of Materials EngineeringNajafabad BranchIslamic Azad UniversityNajafabadIran Department of Mechanical and Industrial Engineering Norwegian University of Science and Technology7491 TrondheimNorway

This study investigates the effect of graphene oxide(GO)on the mechanical and corrosion behavior,antibacterial performance,and cell response of Mg–Zn–Mn(MZM)***/GO nanocomposites with different amounts of GO(i.e.,0.5 wt%,1.0 wt%,and1.5 wt%)were fabricated by the semi-powder metallurgy *** influence of GO on the MZM nanocomposite was analyzed through the hardness,compressive,corrosion,antibacterial,and cytotoxicity *** experimental results showed that,with the increase in the amount of GO(0.5 wt%and 1.5 wt%),the hardness value,compressive strength,and antibacterial performance of the MZM nanocomposite increased,whereas the cell viability and osteogenesis level decreased after the addition of 1.5 wt%***,the electrochemical examination results showed that the corrosion behavior of the MZM alloy was significantly enhanced after encapsulation in 0.5 wt%*** summary,MZM nanocomposites reinforced with GO can be used for implant applications because of their antibacterial performance and mechanical property.

关键词： magnesium-based nanocomposite graphene oxide powder metallurgy method mechanical property antibacterial activity biocompatibility

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Enhanced superelasticity of Cu-Al-Ni shape memory alloys with strong orientation prepared by horizontal continuous casting

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Frontiers of materials science 2022年第4期16卷 105-112页

作者： Mengwei WU Yu XIAO Zhuofan HU Ruiping LIU Chunmei MA Department of Materials Science and Engineering China University of Mining&Technology(Beijing)Beijing 100083China Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China

The preparation of large-scale Cu-Al-Ni shape memory alloys with excellent microstructure and texture is a significant challenge in this *** this study,large-scale Cu-Al-Ni shape memory alloy(SMA)slabs with good surface quality and strong orientation were prepared by the horizontal continuous casting(HCC).The microstructure and mechanical properties were compared with the ordinary casting(OC)Cu-Al-Ni *** results showed that the microstructure of OC Cu-Al-Ni alloy was equiaxed grains with randomly orientation,which had no obvious *** alloys producedby Hcchad herringbone grains withstrong orientation near(100)and the cumulative tensile superelasticity of 4.58%.The superelasticity of the alloy produced by HCC has been improved by 4-5 *** work has preliminarily realized the production of large-scale Cu-Al-Ni SMA slab with good superelasticity,which lays a foundation forexpanding the industrial production and application of Cu-based SMAs.

关键词： shape memory alloy Cu-Al-Ni orientation superelasticity

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Microneedle delivery platform integrated with Staphylococcus epidermidis-derived extracellular vesicles-based nanoantibiotics for efficient bacterial infection atopic dermatitis treatment

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Acta Pharmaceutica Sinica B 2025年第4期15卷 2197-2216页

作者： Zhou, Hong Zhang, Shuting Liu, Xinxin Feng, Aiping Chen, Siyuan Liu, Wei National Engineering Research Center for Nanomedicine College of Life Science and Technology Huazhong University of Science and Technology Wuhan 430074 China Department of Dermatology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430074 China Research Institute for Biomaterials Tech Institute for Advanced Materials Bioinspired Biomedical Materials & Devices Center College of Materials Science and Engineering Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites Suqian Advanced Materials Industry Technology Innovation Center Nanjing Tech University Nanjing 211816 China

Due to the difficulty of overcoming the abnormal epidermal barriers and addressing S. aureus infections without disrupting indigenous skin microbiota, effective treatment of bacterial infection atopic dermatitis (AD) remains a significant clinical challenge. Skin microbiota-derived extracellular vesicles (EVs) shows protentional for skin disease treatment, but the lack of antimicrobial activity and limited skin penetration hamper their application in bacterial infection AD treatment. Here, we developed novel nanoantibiotics by loading Lev into S. epidermidis-derived EVs (Lev@SE-EVs), with supreme antimicrobial activity, regulating epidermal immune responses and enhanced epidermal barrier functionality. The nanoantibiotics were further integrated into hyaluronic acid-based microneedle (MN) for efficient transdermal delivery of therapeutic agents and effectively treating bacterial infection in AD. Upon insertion into the skin, the rapidly released Lev@SE-EVs from MN are uptake by S. aureus in a selective manner, fibroblasts, and surrounding immune cells to exert therapeutic effects in the infected dermal layer, resulting in mitigated skin inflammation, reduced S. aureus burden and increased dermis repair. Notably, Lev@SE-EVs induce IL-17A⁺ CD8⁺ T-cell accumulation in the skin in an unrelated inflammation manner, which may represent heterologous protection. This EVs-integrated MN assisted Lev@SE-EVs to alleviate skin inflammation, repair skin, and provide an effective and safe therapeutic approach for bacterial infection AD treatment. © 2025 The Authors

关键词： Atopic dermatitis Bacterial infection Extracellular vesicles Microneedle Nanoantibiotics Skin microbiota Staphylococcus aureus Staphylococcus epidermidis

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Crystal plane induced in-situ electrochemical activation of manganese-based cathode enable long-term aqueous zinc-ion batteries

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Green Energy & Environment 2023年第5期8卷 1429-1436页

作者： Yuxin Gao Jiang Zhou Liping Qin Zhenming Xu Zhexuan Liu Liangbing Wang Xinxin Cao Guozhao Fang Shuquan Liang School of Materials Science and Engineering Central South UniversityChangsha410083HunanChina Graduate Department Guangxi University of Science and TechnologyLiuzhou545006GuangxiChina College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing210016JiangsuChina Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province Central South UniversityChangsha410083HunanChina

Rapid capacity decay and sluggish reaction kinetics are major barriers hindering the applications of manganese-based cathode materials for aqueous zinc-ion ***,the effects of crystal plane on the in-situ transformation behavior and electrochemical performance of manganese-based cathode is discussed.A comprehensive discussion manifests that the exposed(100)crystal plane is beneficial to the phase transformation from tunnel-structured MnO_(2) to layer-structured ZnMn_(3)O_(7)·3H_(2)O,which plays a critical role for the high reactivity,high capacity,fast diffusion kinetics and long cycling ***,a two-stage zinc storage mechanism can be demonstrated,involving continuous activation reaction and phase transition *** expected,it exhibits a high capacity of 275 mAh g^(-1)at 100 mA g^(-1),a superior durability over 1000 cycles and good rate *** study may open new windows toward developing advanced cathodes for ZIBs,and facilitate the applications of ZIBs in large-scale energy storage system.

关键词： Crystal plane Electrochemical activation Phase transition reaction Cycling stability Zinc-ion batteries

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Modular divergent creation of dual-cocatalysts integrated semiconducting sulfide nanotriads for enhanced photocatalytic hydrogen evolution

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Nano Research 2023年第5期16卷 7967-7973页

作者： Chao Gu Yu-Qing Liu Guo-Qiang Liu Hou-Ming Xu Yi Li Xiao-Long Zhang Liang Wu Lei Shi Shi-Kui Han Min-Rui Gao Shu-Hong Yu Department of Chemistry Institute of Biomimetic Materials&ChemistryAnhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials&ChemistryHefei National Laboratory for Physical Sciences at the MicroscaleInstitute of EnergyHefei Comprehensive National Science CenterUniversity of Science and Technology of ChinaHefei 230026China Key Laboratory of Advanced Catalytic Materials and Reaction Engineering School of Chemistry and Chemical EngineeringHefei University of TechnologyHefei 230009China

Heteronanostructures(HNs)with precise components and interfaces are important for many applications,such as designing efficient and robust solar-to-fuel catalysts via integrating specific semiconductors with favorable band ***,rationally endowing such features with rigorous framework control remains a synthetic ***,we report a modular divergent creation of dual-cocatalysts integrated semiconducting sulfide nanotriads(NTds),comprising both isolated Pd_(x)S oxidation(ox)and MoS_(2) reduction(red)domains within each single CdS counterpart,which exhibit superior photocatalytic activity and stability for hydrogen evolution reaction(HER).The stepwise constructed Pd_(x)S_((ox))−CdS−MoS_(2(red)) NTds possess dualinterfaces facilitating continuous charge separation and segregated active sites accelerating redox reactions,respectively,achieving the HER rate up to 9 mmol·h^(−1)·g^(−1),which is about 60 times higher than that of bare CdS,and show no evidence of deactivation after long-term *** design principle and transformation protocol provide predictable retrosynthetic pathways to HNs with increased degree of complexity and more elaborate functionalities that are otherwise inaccessible.

关键词： heteronanostructures colloidal synthesis semiconducting sulfides photocatalytic hydrogen evolution reaction

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Oxygen vacancy-mediated WO_(3) phase junction to steering photogenerated charge separation for enhanced water splitting

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Journal of advanced Ceramics 2022年第12期11卷 1873-1888页

作者： Huimin LI Qianqian SHEN Han ZHANG Jiaqi GAO Husheng JIA Xuguang LIU Qi LI Jinbo XUE Key Laboratory of Interface Science and Engineering in Advanced Materials of Ministry of Education Taiyuan University of TechnologyTaiyuan 030024China Department of Chemistry Tsinghua UniversityBeijing 100084China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030032China School of Materials Science and Engineering Southwest Jiaotong UniversityChengdu 610031China

Effective charge separation and transfer is deemed to be the contributing factor to achieve high photoelectrochemical(PEC)water splitting performance on *** a phase junction structure with controllable phase transition of WO_(3) can further improve the photocatalytic *** this work,we realized the transition from orthorhombic to monoclinic by regulating the annealing temperatures,and constructed an orthorhombic–monoclinic WO_(3)(o-WO_(3)/m-WO_(3))phase *** formation of oxygen vacancies causes an imbalance of the charge distribution in the crystal structure,which changes the W–O bond length and bond angle,accelerating the phase *** expected,an optimum PEC activity was achieved over the o-WO_(3)/m-WO_(3) phase junction in WO_(3)-450 photoelectrode,yielding the maximum O_(2) evolution rate roughly 32 times higher than that of pure WO_(3)-250 without any sacrificial agents under visible light *** enhancement of catalytic activity is attributed to the atomically smooth interface with a highly matched lattice and robust built-in electric field around the phase junction,which leads to a less-defective and abrupt interface and provides a smooth interfacial charge separation and transfer path,leading to improved charge separation and transfer efficiency and a great enhancement in photocatalytic *** work strikes out on new paths in the formation of an oxygen vacancy-induced phase transition and provides new ideas for the design of catalysts.

关键词： phase transition tungsten oxide lattice mismatch density functional theory(DFT) photoelectrocatalytic water splitting

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