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Iron oxide/CNT-based artificial nacre for electromagnetic interference shielding

Nano research 2024年第7期17卷 6560-6566页

作者： Cheng-Xin Yu Yu-Feng Meng Bo Yang Jun Pang Xiang-Sen Meng Zi-Ye Zhao Qing-Yue Wang Li-Bo Mao Zhi-Kun Wu Shu-Hong Yu Institute of Physical Science and Information Technology Anhui UniversityHefei 230601China Key Laboratory of Materials Physics Anhui Key Laboratory of Nanomaterials and NanotechnologyCAS Center for Excellence in NanoscienceInstitute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031China Department of Chemistry New Cornerstone Science LaboratoryInstitute of Biomimetic Materials&ChemistryAnhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials&ChemistryHefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China

Biological structural materials,despite consisting of limited kinds of compounds,display multifunctionalities due to their complex hierarchical *** some biomimetic strategies have been applied in artificial materials to enhance their mechanical stability,the simultaneous optimization of other functions along with the mechanical properties via biomimetic designs has not been thoroughly ***,iron oxide/carbon nanotube(CNT)-based artificial nacre with both improved mechanical and electromagnetic interference(EMI)shielding performance is fabricated via the mineralization of Fe_(3)O_(4)onto a CNTincorporated *** micro-and nano-structures of the artificial nacre are similar to those of natural nacre,which in turn improves its mechanical *** alternating electromagnetic wave-reflective CNT layers and the wave-absorptive iron oxide layers can improve the multiple reflections of the waves on the surfaces of the reflection layers,which then allows sufficient interactions between the waves and the absorption ***,compared with the reflection-dependent EMI-shielding of the non-structured material,the artificial nacre exhibits strong absorption-dependent shielding behavior even with a very low content of wave-absorptive *** to the high mechanical stability,the shielding effectiveness of the artificial nacre that deeply cut by a blade is still maintained at approximately 70%−96%depending on the incident wave *** present work provides a new way for designing structural materials with concurrently enhanced mechanical and functional properties,and a path to combine structural design and intrinsic properties of specific materials via a biomimetic strategy.

关键词： artificial nacre electromagnetic interference shielding biomineralization biomimetic material hierarchical structure

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Neutron diffraction study on anomalous thermal expansion of CrB_(2)

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Chinese Journal of Structural Chemistry 2023年第5期42卷 8-12页

作者： Yong Xu Xin Chen Yili Cao Kun Lin Chin-Wei Wang Qiang Li Jinxia Deng Jun Miao Xianran Xing Beijing Advanced Innovation Center for Materials Genome Engineering Institute of Solid State ChemistryUniversity of Science and Technology BeijingBeijing100083China Neutron Group National Synchrotron Radiation Research CenterHsinchu30076TaiwanChina

Thermal expansion is an essential issue in the field of materials science and *** of anomalous thermal expansion is beneficial to controlling it and developing related ***,we report disitinctly anisotropic thermal expansion of CrB_(2)via temperature dependence of neutron diffraction,in which positive thermal expansion is observed within basal plane whereas negative thermal expansion emerges along the c ***,zero thermal expansion of unit cell volume is determined from 5 to 130 K with the coefficient of thermal expansion ofāv=0.4(1)×10^(-6)K^(-1).Magnetization measurement shows there is an antiferromagnetic-paramagnetic transition near 90 K,which may correlate to the thermal expansion *** calculations identify no chemical binding of Cr-Cr pair,implying such antiferromagnetic ordering originates from the double exchange interaction of Cr-B-Cr.

关键词： Negative thermal expansion Neutron diffraction Diboride

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Directional terahertz holography with thermally active Janus metasurface

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Light(science & Applications) 2023年第6期12卷 1162-1171页

作者： Benwen Chen Shengxin Yang Jian Chen Jingbo Wu Ke Chen Weili Li Yihui Tan Zhaosong Wang Hongsong Qiu Kebin Fan Caihong Zhang Huabing Wang Yijun Feng Yunbin He Biaobing Jin Xinglong Wu Jian Chen Peiheng Wu Research Institute of Superconductor Electronics(RISE) School of Electronic Science and EngineeringNanjing UniversityNanjing 210023China Purple Mountain Laboratories Nanjing 211111China Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei Key Laboratory of Polymer MaterialsSchool of Materials Science and EngineeringHubei UniversityWuhan 430062China School of Electronic Science and Engineering Nanjing UniversityNanjing 210023China National Laboratory of Solid State Microstructures and School of Physics Nanjing UniversityNanjing 210093China

Dynamic manipulation of electromagnetic(EM)waves with multiple degrees of freedom plays an essential role in enhancing information ***,an enormous challenge is to realize directional terahertz(THz)***,it was demonstrated that Janus metasurfaces could produce distinct responses to EM waves from two opposite incident directions,making multiplexed dynamic manipulation of THz waves ***,we show that thermally activated THz Janus metasurfaces integrating with phase change materials on the meta-atoms can produce asymmetric transmission with the designed phase *** reconfigurable Janus metasurfaces can achieve asymmetric focusing of THz wave and directional THz holography with free-space image projections,and particularly the information can be manipulated via temperature and incident THz wave *** work not only offers a common strategy for realizing the reconfigurability of Janus metasurfaces,but also shows possible applications in THz optical information encryption,data storage,and smart windows.

关键词： directional Directional asymmetric

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Effective CO_(2)activation of enriched oxygen vacancies for photothermal CO_(2)methanation

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Journal of materials science & Technology 2024年第22期189卷 203-210页

作者： Peipei Du Guoqiang Deng Zhonghua Li Junchuan Sun Lu Wang Yongqiang Yang Jun Wang Yaguang Li Xiaoming Xu Yuanming Zhang Wangxi Liu Gang Liu Zhigang Zou Zhaosheng Li Collaborative Innovation Center of Advanced Microstructures National Laboratory of Solid State MicrostructuresCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210093China Jiangsu Key Laboratory of Nano Technology Nanjing UniversityNanjing 210093China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Science and Engineering The Chinese University of Hong KongShenzhen 518172China Research Center for Solar Driven Carbon Neutrality Engineering Research Center of Zero-carbon Energy Buildings and Measurement TechniquesMinistry of EducationThe College of Physics Science and TechnologyInstitute of Life Science and Green DevelopmentHebei UniversityBaoding 071002China

Oxygen vacancies have been widely concerned with the facilitation effects of CO_(2)activation for CO_(2)***,little attention has been paid to the generation of active intermediate species induced by enriched oxygen ***,we discovered that CeNiO_(3−δ)catalyst enriched oxygen vacancies can efficiently activate CO_(2)and realize high activity for photothermal CO_(2)*** situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)proved that oxygen vacancies are beneficial to the formation of reactive intermediate species of polydentate carbonate over CeNiO_(3−δ),which is crucial for efficient CO_(2)*** results revealed mechanistic insights into how effective CO_(2)activation induced by oxygen vacancies can be manipulated by adjusting the adsorption intermediate species.

关键词： Oxygen vacancies CO_(2)activation Active intermediate species Photo-thermal CO_(2)methanation CeNiO_(3)

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Long-Range Electronic Effect-Promoted Ring-Opening Polymerization of Thioctic Acid to Produce Biomimetic Ionic Elastomers for Bioelectronics

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CCS Chemistry 2024年第3期6卷 761-773页

作者： Hongfei Huang Huijing Wang Lijie Sun Ruohan Zhang Luzhi Zhang ZekaiWu Yaxuan Zheng Yang Wang Wei Fu Youwei Zhang Rasoul Esmaeely Neisiany Zhengwei You State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringInstitute of Functional MaterialsDonghua UniversityResearch Base of Textile Materials for Flexible Electronics and Biomedical Applications(China Textile Engineering Society)Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative MedicineShanghai 201620 Institute of Pediatric Translational Medicine Shanghai Children’s Medical CenterSchool of MedicineShanghai Jiao Tong UniversityShanghai 200127 Department of Materials and Polymer Engineering Faculty of EngineeringHakim Sabzevari UniversitySabzevar ***

Poly(disulfide)s have been widely used in flexible wearable electronics,smart materials,and drug *** synthesis of poly(disulfide)s usually utilizes external stimuli or toxic initiators to promote the ***,we indicated that the long-range electronic effect can significantly alter the reactivity of the disulfide ***,we established deprotonation-promoted ring-opening polymerization of thioctic acid(TA)as a highly effective and simple method to synthesize poly(disulfide)s due to the long-range electronic effect and nucleophilic *** external stimuli and initiators,simple mixing of TA and deprotonation reagent,choline bicarbonate,in different ratios at room temperature rapidly produced a series of high molecular weight(up to 772 kDa)ionic liquid crystal poly(disulfide)s elastomers with room temperature self-healing ability,adjustable conductivity(2.39×10^(−2)∼0.28×10^(−2)S m^(−1)),degradability,biocompatibility,antibacterial property,and tissue-like softness(Young’s moduli ranging from 18.2±6.0 to 111.1±36.7 kPa).The experiments and density functional theory calculations also revealed the principle of long-range electronic effect to establish a new synthetic strategy of poly(disulfide)s with superior properties favorable for bioelectronics.

关键词： self-healing elastomers thioctic acid ionic liquid bioelectronics

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Electromagnetic Functions Modulation of Recycled By-Products by Heterodimensional Structure

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Nano-Micro Letters 2025年第6期17卷 264-278页

作者： Ze Nan Wei Wei Zhenhua Lin Ruimei Yuan Miao Zhang Jincheng Zhang Jianyong Ouyang Jingjing Chang Hejun Li Yue Hao State Key Laboratory of Wide-Bandgap Semiconductor Devices and Integrated Technology School of MicroelectronicsXidian UniversityXi’an 710071People’s Republic of China State Key Laboratory of Solidification Processing Shaanxi Province Key Laboratory of Fiber Reinforced Light Composite MaterialsCarbon/Carbon Composites Research CenterNorthwestern Polytechnical UniversityXi’an 710072People’s Republic of China Advanced Interdisciplinary Research Center for Flexible Electronics Xidian UniversityXi’an 710071People’s Republic of China Department of Materials Science and Engineering National University of Singapore7 Engineering Drive 1Singapore 117574Singapore

One of the significant technological challenges in safeguarding electronic devices pertains to the modulation of electromagnetic(EM)wave jamming and the recycling of defensive *** synergistic effect of heterodimensional materials can effectively enable the manipulation of EM waves by altering the *** we propose a novel approach for upcycling by-products of silver nanowires that can fabricate shape-tunable aerogels which enable the modulation of its interaction with microwaves by heterodimensional structure of ***-product heterodimensionality was used to design EM-wave-jamming-dissipation structures and therefore two typical tunable aerogel forms were *** first tunable form was aerogel film,which shielded EM interference(EMI shielding effectiveness(EMI SE)>89 dB)and the second tunable form was foam,which performed dual EM functions(SE>30 dB&reflective loss(RL)<-35 dB,effective absorption bandwidth(EAB)>6.7 GHz).We show that secondary recycled aerogels retain nearly all of their EM protection properties,making this type of closed-loop cycle an appealing *** findings pave the way for the development of adaptive EM functions with nanoscale regulation in a green and closed-loop cycle,and they shed light on the fundamental understanding of microwave interactions with heterodimensional structures.

关键词： Silver nanowires Electromagnetic shielding Microwave absorption Recycled aerogels

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MOF-derived Cu embedded into N-doped mesoporous carbon as a robust support of PdAu nanocatalysts for ethanol electrooxidation

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Rare Metals 2024年第3期43卷 1083-1094页

作者： Yu-Fu Huang Peng Wu Jun-Ping Tang Jian Yang Jing Li Shuai Chen Xue-Ling Zhao ChengChen Bin-Wei Zhang Yan-Yun Ma Wei-Heng Shi Dong-Hai Lin Shi-Gang Sun School of Energy and Materials Shanghai Engineering Research Center of Advanced Thermal Functional MaterialsShanghai Key Laboratory of Engineering Materials Application and EvaluationShanghai Polytechnic UniversityShanghai201209China State Key Laboratory of Physical Chemistry of Solid Surfaces Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China School of Chemistry and Chemical Engineering Chongqing UniversityChongqing401331China Center of Advanced Energy Technology and Electrochemistry Institute of Advanced Interdisciplinary StudiesChongqing UniversityChongqing400044China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou215123China Department of Materials Science and Engineering Drexel UniversityPhiladelphiaPA19104USA

Metal-organic frameworks(MOFs)h ave attracted widespread attention due to their large surface area and porous *** designing the nanostructures of MOFs to promote their application in ethanol electrooxidation is still a ***,a novel Cu-NCNs(Cu-nitrogen-doped carbon nanotubes)support was synthesized by pyrolysis of melamine(MEL)and Cu-ZIF-8 together,and then,Pd-Au nanoalloys were loaded by sodium borohydride reduction method to prepare PdAu@Cu-NCNs *** generating mesoporous carbon with high specific surface area and favorable electron and mass transport can be used as a potential excellent carrier for PdAu *** addition,the balance of catalyst composition and surface structure was tuned by controlling the content of Pd and ***,the best-performed Pd_(2)Au_(2)@Cu-NCN-1000-2(where 1000 means the carrier calcination temperature,and 2 means the calcination constant temperature time)catalyst exhibits better long-term stability and electrochemical activity for ethanol oxidation in alkaline media(4.80 A·mg^(-1)),which is 5.05 times higher than that of commercial Pd/C(0.95 A·mg^(-1)).Therefore,this work is beneficial to further promoting the application of MOFs in direct ethanol fuel cells(DEFCs)and can be used as inspiration for the design of more efficient catalyst support structures.

关键词： Metal-organic frameworks(MOFs) N-doped Mesoporous carbon PdAu Ethanol electrooxidation

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Enhancing the crystallinity and stability of perovskite solar cells with 4-tert-butylpyridine induction for efficiency exceeding 24%

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Journal of Energy Chemistry 2024年第6期93卷 1-7,I0001页

作者： You Liu Lishuang Zheng Kuanxiang Zhang Kun Xu Weicheng Xie Jue Zhang Yulu Tian Tianyuan Liu Hanzhong Xu Ruoming Ma Wei Huang Jiahui Chen Jusheng Bao Chen Chen Yongsheng Zhou Xuchun Wang Junming Chen Jungan Wang College of Chemistry and Materials Engineering Anhui Science and Technology UniversityBengbu 233000AnhuiChina Anhui Province Quartz Sand Purification and Photovoltaic Glass Engineering Research Center Chuzhou 233100AnhuiChina Triumph Photovoltaic Materials Co.Ltd BengbuAnhuiChina National Laboratory of Solid State Microstructures School of PhysicsNanjing UniversityNanjing 210009JiangsuChina JinkoSolar Holding Co.Ltd HainingZhejiangChina

Perovskite solar cells(PSCs)have emerged as a promising photovoltaic technology because of their high light absorption coefficient,long carrier diffusion distance,and tunable ***,PSCs face challenges such as hysteresis effects and stability *** this study,we introduced a novel approach to improve film crystallization by leveraging 4-tert-butylpyridine(TBP)molecules,thereby enhancing the performance and stability of *** findings demonstrate the effective removal of PbI_(2)from the perovskite surface through strong coordination with TBP ***,by carefully adjusting the concentration of the TBP solution,we achieved enhanced film crystallinity without disrupting the perovskite *** TBP-treated perovskite films exhibit a low defect density,improved crystallinity,and improved carrier *** a result,the PSCs manufactured with TBP treatment achieve power conversion efficiency(PCE)exceeding 24%.Moreover,we obtained the PCE of 21.39%for the 12.25 cm^(2)module.

关键词： 4-tert-butylpyridine Film crystallization Perovskite solar cells Power conversion efficiency Stability improvement

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Hybrid hard carbon framework derived from polystyrene bearing distinct molecular crosslinking for enhanced sodium storage

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Carbon Energy 2024年第7期6卷 178-190页

作者： Yuqian Qiu Guangshen Jiang Yanxia Su Xinren Zhang Yuxuan Du Xiaosa Xu Qian Ye Jinbo Zhang Miaohan Ban Fei Xu Hongqiang Wang State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene(NPU)Xi'anChina State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhouChina Shaanxi Yanchang Petroleum(Group)Co. Ltd.Dalian Institute of Chemical Physics Xi'anClean Energy(Chemical)Research InstituteXi'anChina

Exploiting high-performance yet low-cost hard carbon anodes is crucial to advancing the state-of-the-art sodium-ion ***,the achievement of superior initial Coulombic efficiency(ICE)and high Na-storage capacity via low-temperature carbonization remains challenging due to the presence of tremendous defects with few closed ***,a facile hybrid carbon framework design is proposed from the polystyrene precursor bearing distinct molecular bridges at a low pyrolysis temperature of 800℃ via in situ fusion and embedding *** is realized by integrating triazine-and carbonylcrosslinked polystyrene nanospheres during *** triazine crosslinking allows in situ fusion of spheres into layered carbon with low defects and abundant closed pores,which serves as a matrix for embedding the well-retained carbon spheres with nanopores/defects derived from carbonyl ***,the hybrid hard carbon with intimate interface showcases synergistic Na ions storage behavior,showing an ICE of 70.2%,a high capacity of 279.3 mAh g^(-1),and long-term 500 cycles,superior to carbons from the respective precursor and other reported carbons fabricated under the low carbonization *** present protocol opens new avenues toward low-cost hard carbon anode materials for high-performance sodiumion batteries.

关键词： closed pores hybrid hard carbons hypercrosslinking polystyrenes low-temperature carbonization sodium storage

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Interfacial delivery of carbon monoxide via smart titanium implant coating for enhanced soft tissue integration with switchable antibacterial and immunomodulatory properties

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Bioactive materials 2024年第10期40卷 318-333页

作者： Minghao Zhou Gangfeng Li Jingwei Yu Qian Zhou Kun Wang Jiaxin Kang Tengjiao Wang Peng Li Hongbo Wei State Key Laboratory of Oral&Maxillofacial Reconstruction and Regeneration National Clinical Research Center for Oral DiseasesShaanxi Engineering Research Center for Dental Materials and Advanced ManufactureDepartment of Oral ImplantsSchool of StomatologyThe Fourth Military Medical UniversityXi’anShaanxiPR China Frontiers Science Center for Flexible Electronics(FSCFE) Institute of Flexible Electronics(IFE)&Institute of Biomedical Materials and Engineering(IBME)Northwestern Polytechnical University(NPU)Xi’anShaanxiPR China School of Flexible Electronics Henan Institute of Flexible Electronics(HIFE)Henan University379 Mingli RoadZhengzhou450046PR China Chongqing Innovation Center Northwestern Polytechnical UniversityChongqing401135PR China

Soft tissue integration around titanium(Ti)implants is weaker than that around natural teeth,compromising long-term success of Ti *** monoxide(CO)possesses distinctive therapeutic properties,rendering it as a highly promising candidate for enhancing ***,achieving controlled CO generation at the STI interface remains ***,a controlled CO-releasing dual-function coating was constructed on Ti *** near-infrared(NIR)irradiation,the designed surface could actively accelerate CO generation for antibiosis against both aerobic and anaerobic *** importantly,in the absence of NIR,the slow release of CO induces macrophage polarization from pro-inflammatory phenotype towards pro-regenerative *** a rat implantation model with induced infection,the designed surface effectively controlled the bacterial infection,alleviates accompanying inflammation and modulated immune microenvironment,leading to enhanced ***-cell sequencing revealed that the coating alters the cytokine profile within the soft tissue,thereby influencing cellular *** expressed genes in macrophages are highly enriched in the PIK3-Akt ***,the cellular communication between fibroblasts and macrophages was significantly enhanced through the CXCL12/CXCL14/CXCR4 and CSF1-CSF1R ligand-receptor *** findings indicate that our coating showed an appealing prospect for enhancing STI around Ti implants,which would ultimately contribute to the improved long-term success of Ti implants.

关键词： Gastrotransmitters Soft tissue integration Immune microenvironment Ti implants Antibacterial

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