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Efficient solution-processable OLEDs near BT.2020 red standard enabled by a multiresonant emitter

science Bulletin 2024年第19期69卷 2983-2986页

作者： Hui Wang Ying-Chun Cheng Xiao-Chun Fan Dong-Yang Chen Xin Xiong Xiao-Yao Hao Yi-Zhong Shi Jia Yu Da Huang Jia-Xiong Chen Kai Wang Xiao-Hong Zhang Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123China School of Materials Science and Engineering Suzhou University of Science and TechnologySuzhou 215123China Suzhou Institute of Renewable Energy and Photoelectronics Suzhou 215101China School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices Soochow UniversitySuzhou 215123China Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow UniversitySuzhou 215123China

Organic light-emitting diodes(OLEDs)are a highly competitive technology for high-quality displays,but they face considerable challenges in satisfying the BT.2020 standard for ultrahighdefinition displays,mainly due to... 详细信息

关键词： OLEDs emitter resonant

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Nonvolatile anomalous Nernst effect in Mn5Si3 with a collinear Néel vector

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Physical Review Applied 2025年第4期23卷 044066-044066页

作者： L. Han X.Z. Fu W.Q. He J.K. Dai Y.X. Zhu W.F. Yang Y.L. Chen J.C. Zhang W.X. Zhu H. Bai C. Chen D.Z. Hou C.H. Wan X.F. Han C. Song J.W. Liu F. Pan Key Laboratory of Advanced Materials School of Materials Science and Engineering Tsinghua University Beijing 100084 China Department of Physics The Hong Kong University of Science and Technology Hong Kong 999077 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China International Center for Quantum Design of Functional Materials (ICQD) School of Emerging Technology University of Science and Technology of China Hefei 230026 China

For magnetic-resistant and ultrafast transverse thermoelectric converters, antiferromagnets with a collinear Néel vector have unique advantages but their anomalous Nernst effect (ANE), as the fundamental requirement, remains unachieved due to the spin-degenerated bands. Here, we realize the nonvolatile ANE in an altermagnet from Mn5Si3 thin films with a collinear Néel vector under strain, where the Berry curvature from the intersections of spin-splitting bands (instead of a tiny net moment) determines the anomalous Nernst conductivity. The ANE undergoes a sixfold enhancement via doping, most likely due to the raised Fermi level. Order parameter fluctuations induce unique temperature dependence, which also applies to other suitable altermagnets. Our work not only fills a longstanding gap by observing the nonvolatile ANE in material with a collinear Néel vector but also enlightens thermoelectric physics related to spin-splitting bands.

关键词： Thermoelectricity

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Deciphering the Role of Fluoroethylene Carbonate towards Highly Reversible Sodium Metal Anodes

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Research 2022年第2期2022卷 259-269页

作者： Xueying Zheng Suting Weng Wei Luo Bo Chen Xiao Zhang Zhenyi Gu Haotian Wang Xiaolu Ye Xuyang Liu Liqiang Huang Xinglong Wu Xuefeng Wang Yunhui Huang Institute of New Energy for Vehicdes Shanghai Key Laboratory of Developmrent&Apication for Metali Functional MaterialsSchool of Materials Science and EngineringTongji UniversitShanghai 201804China Instiute of Physics Chinese Academy of SciencesSchoo of Plhysical SciencesUniversity of Chinese Academy of SciencesBeiing 100190China Key Laboratory of Advanced Civil Engineering Materials(Tongji University) Ministry of EducationShanghai 201804China Key Laboratory for UV Light Emiting Materials and TechnologyNortheast Normal UniversilyMinistry of EducationChangchumJilin 130024China Tianmu Lake Institute of Advanced Energy Storage Technologies Co. LtdLiyangJiangsu 213300China State Key Laboratory of Materials Procssing and Die&Mould Technology Schoo of Materials Science and Engineering Huazhong University of Science and TechnologyWuhanHubei 430074China

Sodium metal anodes(SMAs)sufer from extremely low reversibility(95%with conventional NaPF。salt at a regular concentration(1.0M).The peculiar role of FEC is *** via its involvement into the solvation structure,where a... 详细信息

Sodium metal anodes(SMAs)sufer from extremely low reversibility(<20%)in carbonate based clectrolytes-this piece of knowledge gained from previous studics has ruled out the application of carbonate solvents for sodium metal ***,we overturn this conclusion by incorporating fluoroethylene carbonate(FEC)as cosolvent that renders a Na plating/stripping fficiency of>95%with conventional NaPF。salt at a regular concentration(1.0M).The peculiar role of FEC is *** via its involvement into the solvation structure,where a threshold FEC concentration with a coordination number>1.2 is needed in guaranteeing high Na reversibility over the ***,by incorporating an average number of 1.2 FEC molecules into the primary Na*solvation sheath,lowest unoccupied molecular orbital(LUMO)levels of such Nat-FEC solvates undergo further decrease,with spin electrons residing either on the O=C 0(O)moiety of FEC or sharing between Na*and its C=:O bond,which ensures a prior FEC decomposition in passivating the Na surface against other carbonate ***,by adopting cryogenic tranmission electron microscopy(cryo-TEM),we found that the Na filaments grow into substantially larger diameter from-400nm to>1 pum with addition of FEC upon the threshold *** crstalline and much thiner(-40 nm)slid-electrolyte interphase(SED)is consequently observed to uniformly wrap the Na surface,in contrast to the severely corroded Na as retrieved from the blank *** potence of FEC is further demonstrated in a series of"corrosive solvents"such as ethy!l acetate(EA)。trimethyl phosphate(TMP),and actonitrile(AN)enabling highly reversible SMAs in the otherwise unusable solvent systems.

关键词： electrolyte otherwise Highly

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In-situ growth of carbon nanotubes on ZnO to enhance thermoelectric and mechanical properties

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Journal of advanced Ceramics 2022年第12期11卷 1932-1943页

作者： Shengjie FAN Tingting SUN Meng JIANG Shijia GU Lianjun WANG Haixue YAN Wan JIANG State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China Engineering Research Center of Advanced Glasses Manufacturing Technology Ministry of EducationDonghua UniversityShanghai 201620China Institute of Functional Materials Donghua UniversityShanghai 201620China School of Engineering and Materials Science Queen Mary University of LondonLondon E14NSUK

As a high-temperature thermoelectric(TE)material,ZnO offers advantages of non-toxicity,chemical stability,and oxidation resistance,and shows considerable promise as a true ready-to-use module under air ***,poor electrical conductivity and high thermal conductivity severely hinder its *** nanotubes(CNTs)are often used as a reinforcing phase in composites,but it is difficult to achieve uniform dispersion of CNTs due to van der Waals ***,we developed an effective in-situ growth strategy of homogeneous CNTs on ZnO nanoparticles by exploiting the chemical vapor deposition(CVD)technology,in order to improve their electrical conductivity and mechanical properties,as well as reducing the thermal ***,magnetic nickel(Ni)nanoparticles are introduced as catalysts for promoting the formation of CNTs,which can also enhance the electrical and thermal transportation of ZnO ***,the electrical conductivity of ZnO is significantly boosted from 26 to 79 S·cm^(−1) due to the formation of dense and uniform conductive CNT *** lattice thermal conductivity(κ_(L))is obviously declined by the intensification of phonon scattering,resulting from the abundant grain boundaries and interfaces in ZnO-CNT ***,the maximum dimensionless figure of merit(zT)of 0.04 at 800 K is obtained in 2.0%Ni-CNTs/ZnO,which is three times larger than that of CNTs/ZnO prepared by traditional ultrasonic *** addition,the mechanical properties of composites including Vickers hardness(HV)and fracture toughness(K_(IC))are also *** work provides a valuable reference for dispersing nano-phases in TE materials to enhance both TE and mechanical properties.

关键词： ZnO carbon nanotubes(CNTs) in-situ grown thermoelectric(TE) mechanical properties

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Structural and biochemical basis of Arabidopsis FERONIA receptor kinase-mediated early signaling initiation

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Plant Communications 2023年第4期4卷 132-145页

作者： Yanqiong Kong Jia Chen Lingli Jiang Hong Chen Yanan Shen Lifeng Wang Yujie Yan Huan Zhou Heping Zheng Feng Yu Zhenhua Ming State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources College of Life Science and TechnologyGuangxi Key Laboratory for Sugarcane BiologyGuangxi UniversityNanning 530004P.R.China State Key Laboratory of Chemo/Biosensing and Chemometrics College of BiologyHunan Key Laboratory of Plant Functional Genomics and Developmental RegulationHunan UniversityChangsha 410082P.R.China State Key Laboratory of Hybrid Rice Hunan Hybrid Rice Research CenterChangsha 410125P.R.China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghaiP.R.China

Accumulating evidence indicates that early and essential events for receptor-like kinase(RLK)function involve both autophosphorylation and substrate ***,the structural and biochemical basis for these events is largely ***,we used RLK FERONIA(FER)as a model and crystallized its core kinase domain(FER-KD)and two FER-KD mutants(K565R,S525A)in complexes with ATP/ADP and Mg^(2+) in the unphosphorylated *** FER-KD was found to adopt an unexpected active conformation in its crystal ***,unphosphorylated FER-KD mutants with reduced(S525A)or no catalytic activity(K565R)also adopt similar active *** studies revealed that FER-KD is a dual-specificity kinase,and its autophosphorylation is accomplished via an intermolecular *** investigations confirmed that initiating substrate phosphorylation requires autophosphorylation of the activation segment on T696,S701,and *** study reveals the structural and biochemical basis for the activation and regulatory mechanism of FER,providing a paradigm for the early steps in RLK signaling initiation.

关键词： FERONIA active conformation kinase activity autophosphorylation activation

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Microstructure,wear and friction behavior of CoCrAITaY-xCNTs composite coatings deposited by laser-induction hybrid cladding

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Rare Metals 2024年第4期43卷 1815-1827页

作者： Sheng-Feng Zhou Yu Long Yan-Liang Yi Cheng Deng Lian-Xi Hu Institute of Advanced Wear&Corrosion Resistant and Functional Materials Jinan UniversityGuangzhou510632China Wuhan National Laboratory for Optoelectronics(WNLO) Huazhong University of Science and TechnologyWuhan430074China MOE Key Laboratory of New Processing Technology for Non-Ferrous Metals and Materials Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured MaterialsGuangxi UniversityNanning530004China School of Mechatronics Engineering Guangdong Polytechnic Normal UniversityGuangzhou510635China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin150001China

To improve the wear performance of CoCrAlYTa coating,part of the carbon nanotubes(CNTs)chemically reacted with Ta to form reinforcement phase(TaC),while the other CNTs were retained as lubrication ***,the CoCrAlYTa-xCNTs(x=0,1,2,and 4;wt%)composite coatings were prepared by laserinduction hybrid cladding(LIHC),and the microstructure and wear resistance of coatings were systematically *** show that the coatings are mainly composed of TaC,y-(Co,Cr)andβ-(Co,Cr)*** the CNTs content increases from 0 wt%to 4 wt%,the volume fraction of TaC increases from 13.11 vol%to 16.12 vol%.Meanwhile,the nano-hardness ofγ-(Co,Cr)andβ-(Co,Cr)Al are improved from 7.49 and 9.72 to 9.36 and 11.19 GPa,*** a result,the microhardness of coating increases from HV536.25 to HV 738.16,the wear rate decreases from32.4×10^(-3)to 6.1×10^(-3)mg·m^(-1),and the average friction coefficient decreases from 0.55 to *** good wear performance of the coating is attributed to the formation of TaC and the existence of remained CNTs lubricant film.

关键词： Carbon nanotube MCrAlY coating Friction and wear performance Laser-induction hybrid cladding

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High-angular-momentum topological superconductivities in twisted bilayer quasicrystal systems

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Physical Review B 2023年第1期107卷 014501-014501页

作者： Yu-Bo Liu Yongyou Zhang Wei-Qiang Chen Fan Yang School of Physics Beijing Institute of Technology Beijing 100081 China Department of Physics and Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen 518055 China Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices Southern University of Science and Technology Shenzhen 518055 China

The electron states in the quasicrystal (QC) are hot topics recently. While previous attentions were focused on such intrinsic QCs as the Penrose lattice, the recent “twistronics” provides us with a new type of QC, i.e., the extrinsic QC, including the 30∘-twisted bilayer graphene and 45∘-twisted bilayer cuprates as two synthesized examples, unifiedly dubbed as TB-QC. Here we build an efficient microscopic framework to study electron-electron interaction driven superconductivities (SCs) in these extrinsic QCs, and find that their nature sits in between those of crystals and intrinsic QCs. Remarkably, our microscopic calculations on the three exemplar TB-QCs reveal various novel topological SCs carrying high angular momenta and high Chern numbers protected by their unique QC symmetries, absent in conventional crystalline materials. The nature of SCs in these extrinsic QCs is also fundamentally different from those in intrinsic QCs in the aspect of pairing-symmetry classifications and topological properties.

关键词： Superconducting order parameter Superconductivity Topological superconductors

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Enhancing Accuracy and Feature Insights in Hydration Free Energy Predictions for Small Molecules with Machine Learning

arXiv

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arXiv 2024年

作者： Han, Mingjun Zhang, Yukai Yu, Taotao Du, Guodong Yam, ChiYung Tang, Ho-Kin School of Science Harbin Institute of Technology Shenzhen518055 China Shenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive Application Shenzhen518055 China Shenzhen Institute for Advanced Study University of Electronic Science and Technology of China Shenzhen518000 China

The accurate prediction of solvation free energy is of significant importance as it governs the behavior of solutes in solution. In this work, we apply a variety of machine learning techniques to predict and analyze the alchemical free energy of small molecules. Our methodology incorporates an ensemble of machine learning models with feature processing using the K-nearest neighbors algorithm. Two training strategies are explored: one based on experimental data, and the other based on the offset between molecular dynamics (MD) simulations and experimental measurements. The latter approach yields a substantial improvement in predictive accuracy, achieving a mean unsigned error (MUE) of 0.64 kcal/mol. Feature analysis identifies molecular geometry and topology as the most critical factors in predicting alchemical free energy, supporting the established theory that surface tension is a key determinant. Furthermore, the feature analysis of offset results highlights the relevance of charge distribution within the system, which correlates with the inaccuracies in force fields employed in MD simulations and may provide guidance for improving force field designs. These results suggest that machine learning approaches can effectively capture the complex features governing solvation free energy, offering novel pathways for enhancing predictive accuracy. Copyright © 2024, The Authors. All rights reserved.

关键词： Solvation

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Amyloid-β in Alzheimer's disease: Structure, toxicity, distribution, treatment, and prospects

Ibrain

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Ibrain 2024年第3期10卷 266-289页

作者： Yu, Yifan Yu, Shilong Battaglia, Giuseppe Tian, Xiaohe Institute for Bioengineering of Catalunya (IBEC) The Barcelona Institute of Science and Technology (BIST) Barcelona (Spain) Carrer Baldiri I Reixac Barcelona Spain Catalan Institution for Research and Advanced Studies (ICREA) Barcelona Spain Department of Radiology and Huaxi MR Research Center (HMRRC) Functional and Molecular Imaging Key Laboratory of Sichuan Province West China Hospital Sichuan University Chengdu China

Amyloid-β (Aβ) is a pivotal biomarker in Alzheimer's disease (AD), attracting considerable attention from numerous researchers. There is uncertainty regarding whether clearing Aβ is beneficial or harmful to cognitive function. This question has been a central topic of research, especially given the lack of success in developing Aβ-targeted drugs for AD. However, with the Food and Drug Administration's approval of Lecanemab as the first anti-Aβ medication in July 2023, there is a significant shift in perspective on the potential of Aβ as a therapeutic target for AD. In light of this advancement, this review aims to illustrate and consolidate the molecular structural attributes and pathological ramifications of Aβ. Furthermore, it elucidates the determinants influencing its expression levels while delineating the gamut of extant Aβ-targeted pharmacotherapies that have been subjected to clinical or preclinical evaluation. Subsequently, a comprehensive analysis is presented, dissecting the research landscape of Aβ across the domains above, culminating in the presentation of informed perspectives. Concluding reflections contemplate the supplementary advantages conferred by nanoparticle constructs, conceptualized within the framework of multivalent theory, within the milieu of AD diagnosis and therapeutic intervention, supplementing conventional modalities. © 2024 The Author(s). Ibrain published by Affiliated Hospital of Zunyi Medical University (AHZMU) and Wiley-VCH GmbH.

关键词： Alzheimer's disease anti-Aβ drugs Aβ multivalency nanodrugs

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The synthesis of carbon microspheres film composed of nano-onions and its application as flexible supercapacitors

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Carbon Energy 2021年第3期3卷 509-518页

作者： Miao Zhang Naiqin Zhao Xifei Li Tianjin International Joint Research Centre of Surface Technology for Energy Storage Materials School of Physics and Materials ScienceTianjin Normal UniversityTianjinChina Tianjin Key Laboratory of Composite and Functional Materials School of Materials Science and EngineeringTianjin UniversityTianjinChina

Flexible electrodes with superior mechanical and electrochemical properties are essential for flexible supercapacitors.A convenient and scalable colloidal film-assisted chemical vapor deposition(CF-CVD)method is developed for the one-step fabrication of the carbon microspheres films composed of carbon nano-onions(CMS-CNO films).The influence of growth conditions(such as growth temperature,time,and gas ratio)during CF-CVD process on the carbon structures and the growth mechanism of the CMS-CNO films have been *** controlling the growth conditions,the controllable preparation of CMS-CNO films is *** binder-free films can be used for the assembly of flexible supercapacitors,and unique architecture can achieve excellent *** from the composite of nano-micro zero dimensional structures,the performance of the film in supercapacitors is remarkably *** the current density of 5 mA cm^(-2),the area-specific capacity can be 903 mF cm^(-2).When the current density is increased to 500 mA cm^(-2),the area-specific capacity can be increased to 729 mF cm^(-2).This simple and low-cost preparation process and the superb electrochemical performance suggest great potential applications of CMS-CNO films in flexible supercapacitors.

关键词： carbon nano-onions composite films flexible supercapacitors

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