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Enhancing crystal integrity and structural rigidity of CsPbBr_(3) nanoplatelets to achieve a narrow colorsaturated blue emission

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light(Science & Applications) 2024年第5期13卷 985-997页

作者： Qianqian Huang Wenxu Yin Bo Gao Qingsen Zeng Dong Yao Hao Zhang Yinghe zhao Weijia Zheng Jiaqi Zhang Xuyong Yang Xiaoyu Zhang Andrey l.Rogach Key laboratory of Automobile Materials MOE School of Materials Science&Engineeringand Jilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy MaterialsJilin UniversityChangchunChina. State Key laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchunChina. State Key laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhanHubeiChina. Department of Chemistry University of VictoriaVictoriaBCCanada. Key laboratory of Advanced Display and System Applications of Ministry of Education Shanghai UniversityShanghaiChina. Department of Materials Science and Engineering and Centre for Functional Photonics(CFP)City University of Hong KongHong Kong S.A.RChina

Quantum-confined CsPbBr_(3) perovskites are promising blue emitters for ultra-high-definition displays,but their soft lattice caused by highly ionic nature has a limited ***,we endow CsPbBr_(3) nanoplatelets(nPls)with atomic crystal-like structural rigidity through proper surface engineering,by using strongly bound n-dodecylbenzene sulfonic acid(DBSA).A stable,rigid crystal structure,as well as uniform,orderly-arranged surface of these nPls is achieved by optimizing intermediate reaction stage,by switching from molecular clusters to mono-octahedra,while interaction with DBSA resulted in formation of a Cs_(x)O monolayer shell capping the nPl *** a result,both structural and optical stability of the CsPbBr3 nPls is enhanced by strong coval.nt bonding of DBSA,which inhibits undesired phase transitions and decomposition of the perovskite phase potentially caused by ligand ***,rather small amount of DBSA ligands at the nPl surface results in a short inter-nPl spacing in their closely-packed films,which facilitates efficient charge injection and *** photoluminescence of the produced CsPbBr_(3) nPls is bright(nearly unity emission quantum yield)and peaks at 457 nm with an extremely narrow bandwidth of 3.7 nm at 80 K,while the bandwidth of the electroluminescence(peaked at 460 nm)also reaches a record-narrow value of 15 nm at room *** value corresponds to the CIE coordinates of(0.141,0.062),which meets Rec.2020 standards for ultra-high-definition displays.

关键词： temperature stability narrow

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Current-Induced Magnetization Switching Behavior in Perpendicular Magnetized l1_(0)-MnAl/B2-CoGa Bilayer

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Chinese Physics letters 2024年第5期41卷 138-143页

作者：孙宏利韩荣坤秦红蕊赵旭鹏谢志成魏大海赵建华 State Key laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100190China International School of Microelectronics Dongguan University of TechnologyDongguan 523808China

Rare-earth-free Mn-based binary alloy l1_(0)-MnAl with bulk perpendicular magnetic anisotropy(PMA) holds promise for high-performance magnetic random access memory(MRAM) devices driven by spin-orbit torque(SOT). However, the lattice-mismatch issue makes it chall.nging to place conventional spin current sources, such as heavy metals, between l1_(0)-MnAl layers and substrates. In this work, we propose a solution by using the B2-CoGa alloy as the spin current source. The lattice-matching enables high-quality epitaxial growth of 2-nm-thick l1_(0)-MnAl on B2-CoGa, and the l1_(0)-MnAl exhibits a large PMA constant of 1.04 × 10^(6)J/m^(3). Subsequently, the considerable spin Hall effect in B2-CoGa enables the achievement of SOT-induced deterministic magnetization switching. Moreover, we quantitatively determine the SOT efficiency in the bilayer. Furthermore, we design an l1_(0)-MnAl/B2-CoGa/Co_(2)MnGa structure to achieve field-free magnetic switching. Our results provide valuable insights for achieving high-performance SOT-MRAM devices based on l1_(0)-MnAl alloy.

关键词： alloy enable holds

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Effects of Rattl.ng Behavior of K and Cd Atoms al.ng Different Directions in Anisotropic KCdAs on lattice Thermal Transport and Thermoelectric Properties

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Energy & Environmental Materials 2024年第6期7卷 388-398页

作者： Yue Wang Yinchang zhao Jun ni Zhenhong Dai Department of Physics Yantai UniversityYantai 264005China State Key laboratory of low-Dimensional Quantum Physics Department of PhysicsTsinghua UniversityBeijing 100084China

We employ advanced first principles methodology,merging self-consistent phonon theory and the Boltzmann transport equation,to comprehensively explore the thermal transport and thermoelectric properties of ***,the study accounts for the impact of quartic anharmonicity on phonon group velocities in the pursuit of lattice thermal conductivity and investigates 3ph and 4ph scattering processes on phonon *** various methodologies,including examining atomic vibrational modes and analyzing 3ph and 4ph scattering processes,the article unveils microphysical mechanisms contributing to the lowκl within *** features include significant anisotropy in Cd atoms,pronounced anharmonicity in K atoms,and relative vibrations in non-equival.nt As atomic *** atoms,situated between As layers,exhibit rattl.ng modes and strong lattice anharmonicity,contributing to the observed lowκ*** flat bands near the val.nce band maximum translate into high PF,aligning with ultralowκl for exceptional thermoelectric *** optimal temperature and carrier concentration doping,outstanding ZT values are achieved:4.25(a(b)-axis,p-type,3×10^(19)cm^(−3),500 K),0.90(c-axis,p-type,5×10^(20)cm^(−3),700 K),1.61(a(b)-axis,n-type,2×10^(18)cm^(−3),700 K),and 3.06(c-axis,n-type,9×10^(17)cm^(−3),700 K).

关键词： anharmonic lattice dynamics electron transport characteristics first principles calculation lattice thermal transport octahedron thermoelectric properties

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Mutual antagonism of mouse-adaptation mutations in HA and PA proteins on H9n2 virus replication

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Virologica Sinica 2024年第1期39卷 56-70页

作者： liping Ma Huabin Zheng Xianliang Ke rui Gui Zhongzi Yao Jiasong Xiong Quanjiao Chen CAS Key laboratory of Special Pathogens and Biosafety Wuhan Institute of VirologyChinese Academy of SciencesWuhan430207China Center for Biosafety Mega-Science Wuhan Institute of VirologyChinese Academy of SciencesWuhan430207China Hubei Jiangxia laboratory Wuhan430207China University of Chinese Academy of Sciences Beijing100049China

Avian H9n2 viruses have wide host range among the influenza A ***,knowledge of H9n2 mammalian adaptation is *** explore the molecular basis of the adaptation to mammals,we performed serial l.ng passaging of the H9n2 strain A/chicken/Hunan/8.27 YYGK3W3-OC/2018(3W3)in mice and identified six mutations in the hemagglutinin(HA)and polymerase acidic(PA)*** l226Q,T511I,and A528V of HA were responsible for enhanced pathogenicity and viral replication in mice;notably,HA-l226Q was the key *** T97I,I545V,and S594G of PA contributed to enhanced polymerase activity in mammalian cells and increased viral replication levels in vitro and in ***-T97I increased viral polymerase activity by accelerating the viral polymerase complex *** findings revealed that the viral replication was affected by the presence of PA-97I and/or PA-545V in combination with a triple-point HA ***,the double-and triple-point PA mutations demonstrated antagonistic effect on viral replication when combined with ***,any combination of PA mutations,al.ng with double-point HA mutations,resulted in antagonistic effect on viral *** also observed antagonism in viral replication between PA-545V and PA-97I,as well as between HA-528V and *** findings demonstrated that several antagonistic mutations in HA and PA proteins affect viral replication,which may contribute to the H9n2 virus adaptation to mice and mammalian *** findings can potentially contribute to the monitoring of H9n2 field strains for assessing their potential risk in mammals.

关键词： Influenza Avirus(IAV) H9n2 HA PA Antagonism Mouse adaptation

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我国接续性医疗服务机构发展的政策历程及建设现状

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中国卫生经济 2024年第1期43卷 8-10,37页

作者：赵锐童潇国家中医药管理局监测统计中心北京100600 徐州市云龙区疾病预防控制中心江苏徐州221009

接续性医疗服务机构作为应对人口老龄化、疾病慢病性化的重要医疗服务提供主体,接续性医疗服务机构发展模式如何与现有的分级诊疗制度建设相适应,逐渐引起重视。研究将对我国接续性医疗服务机构的支持政策、发展现状等进行梳理,发现新... 详细信息

接续性医疗服务机构作为应对人口老龄化、疾病慢病性化的重要医疗服务提供主体,接续性医疗服务机构发展模式如何与现有的分级诊疗制度建设相适应,逐渐引起重视。研究将对我国接续性医疗服务机构的支持政策、发展现状等进行梳理,发现新时期接续性医疗服务发展中存在的问题,以期能为我国接续性医疗服务未来的可持续发展提供参考和建议。

关键词：接续性医疗分级诊疗康复护理

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Mutations in wheat TaAPA2 gene result in pleiotropic effects on pl.nt architecture

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Science China(life Sciences) 2024年第9期67卷 2039-2042页

作者： Shengsheng Bai Guiping Wang rui Song Yanna liu lei Hua Jinwei Yang lijun Zhang Shams ur Rehman Xiaohua Hao lifeng Hou Chaozhong Zhang Hongna li Yanyan liang lihua zhao Yan Xue Zheng Wang Shisheng Chen national Key laboratory of Wheat Improvement Peking University Institute of Advanced Agricultural SciencesShandong Laboratory of Advanced Agriculture Sciences in WeifangWeifang 261325China Department of Pl.nt Sciences University of CaliforniaDavisCA 95616USA

Dear Editor,Bread wheat(Triticum aestivum l.)is a globally important cereal providing~20% of the calories and proteins for>4.5billion *** architecture,including morphologies of leaves,spikes,stems,and roots,has great impact on pl.nt development and productivity,and thus has been extensively investigated in various pl.nt species(Jiang et al.,2023;Zhang et al.,2017).

关键词： cereal globally roots

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Janus hydrogel/electrospun-membrane dressing enhancing wound heal.ng in rats

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Biomedical Engineering Communications 2024年第2期3卷 17-25页

作者： Zi-rui Zhu Jia-na Huang Jin-Ze li Hao Cao zhao-Yi l.n Yan li School of Biomedical Engineering Shenzhen Campus of Sun Yat-sen UniversityShenzhen 518107China Guangdong Provincial Key laboratory of Sensor Technology and Biomedical Instrument Sun Yat-sen UniversityGuangzhou 510006China

Background:Excessive exudate secreted from chronic wounds often leads to overhydration and *** a variety of dressings are currently available in cl.nical applications,they frequently fail to provide multifunction to promote chronic wound *** dressings with a Janus structure,featuring distinct properties on each side,are potential to improve wound ***:Composite dressings with a Janus structure were fabricated,comprising freeze-dried polycaprolactone(PCl)electrospun membrane and alginate-based *** PCl fibrous membrane provided air permeability,while the hydrogel loaded with Deferoxamine,composed of alginate and poly(n-isopropylacrylamide)(PnIPAM),exhibited hygroscopic *** inclusion of PnIPAM imparted ***:The hydrogel(thickness of 2.778±0.082 mm)exhibited a robust adhesion to the fiber membrane(thickness of 0.261±0.041 mm).For AnDC(Alginate-PnIPAM hydrogel with Deferoxamine/PCl membrane)samples,the water vapor transmission rate(WVTR)was measured to be 3364.80±23.23 g∙m−2∙day−1 and the swell.ng ratio at 2 h was determined to be 1179±125%.The thermo-responsivity of AnDC samples manifested in an increased swell.ng rate,escalating from 797±189%at 37°C to 1132±147%at 4°*** elastic modulus was assessed for lyophilized and rehydrated AnDC *** theωof the rheometer rotor was decreased from 10 rad/s to 0.1 rad/s,the lyophilized dressing exhibited a decrease from 2.65±0.01 MPa to 1.80±0.90 MPa,while the rehydrated dressing demonstrated an increase from 133.65±55.68 Pa to 264.23±141.71 *** pro-heal.ng properties of the dressings were evaluated using full-thickness skin defect model on SD rats,and a circular wound of diameter 10 mm healed completely by day ***:The dressings not only protected the wound and absorbed excess exudate,but also demonstrated nondestructive peelability upon cool.ng,providing a novel approach for accelerating wound heal.ng and management.

关键词： Janus structure composite dressing wound heal.ng

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On traceable iterated l.ne graph and hamiltonian path index

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Applied Mathematics(A Journal of Chinese Universities) 2024年第2期39卷 239-252页

作者： nIU zhao-hong XIOnG li-ming YAnG Wei-hua School of Mathematical Sciences Shanxi UniversityTaiyuan 030006China School of Mathematics and Statistics Beijing Key Laboratory on MCAACIBeijing Institute of TechnologyBeijing 100081China Department of Mathematics Taiyuan University of TechnologyTaiyuan 030024China

Xiong and liu[21]gave a characterization of the graphs G for which the n-iterated l.ne graph l^(n)(G)is hamiltonian,for n≥*** this paper,we study the existence of a hamiltonian path in l^(n)(G),and give a characterization of G for which l^(n)(G)has a hamiltonian *** applications,we use this characterization to give several upper bounds on the hamiltonian path index of a graph.

关键词： iterated l.ne graph traceable hamiltonian index hamiltonian path index

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High-quality genomes of Bombax ceiba and Ceiba pentandra provide insights into the evolution of Malvaceae species and differences in their natural fiber development

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Pl.nt Communications 2024年第5期5卷 189-207页

作者： lei Shao Shangkun Jin Jinwen Chen Guangsui Yang rui Fan Zhiyuan Zhang Qian Deng Jin Han Xiaowei Ma Zeyu Dong Hejun lu Wanying Hu Kai Wang lisong Hu Zhen Shen Surong Huang Ting zhao Xueying Guan Yan Hu Tianzhen Zhang lei Fang Zhejiang Provincial Key laboratory of Crop Genetic Resources Institute of Crop SciencePlant Precision Breeding AcademyCollege of Agriculture and BiotechnologyZhejiang UniversityHangzhou 310058China Hainan Institute of Zhejiang University Sanya 572025China Tropical Crop Germplasm Research Institute Chinese Academy of Tropical Agricultural SciencesHaikou 571101China Spices and Beverages Research Institute Chinese Academy of Tropical Agricultural SciencesWanning 571533China School of life Sciences Nantong UniversityNantong 226019China

Members of the Malvaceae family,including Corchorus spp.,Gossypium spp.,Bombax spp.,and Ceiba spp.,are important sources of *** the past decade,the genomes of several Malvaceae species have been assembled;however,the evolutionary history of Malvaceae species and the differences in theirfiber development remain to be ***,we report the genome assembly and annotation of two nat-uralfiber pl.nts from the Malvaceae,Bombax ceiba and Ceiba pentandra,whose assembled genome sizes are 783.56 Mb and 1575.47 Mb,*** analysis revealed that whole-genome duplication and Gypsy l.ng terminal repeat retroelements have been the major causes of differences in chromosome number(2n=14 to 2n=96)and genome size(234 Mb to 2676 Mb)among Malvaceae *** also used comparative genomic analyses to reconstruct the ancestral Malvaceae karyotype with 11 proto-chromo-somes,providing new insights into the evolutionary trajectories of Malvaceae ***-MIXTA-like 3 is relatively conserved among the Malvaceae and functions infiber cell-fate determination in the *** appears to perform this function in any tissue where it is expressed,*** on the endo-carp of *** and in ovulefibers of *** identified a structural variation in a cellulose synthase gene and a higher copy number of cellulose synthase-like genes as possible causes of thefiner,less spinnable,weakerfibers of *** study provides two high-quality genomes of naturalfiber pl.nts and offers insights into the evolution of Malvaceae species and differences in their naturalfiber formation and devel-opment through multi-omics analysis.

关键词： Malvaceae species genome evolution ancestral karyotype fiber differentiation

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Auxiliary ligand-induced assembly of atomically precise silver clusters

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Science China Chemistry 2024年

作者： Yeqin Feng Xuemeng Jing Fangyu Fu Mengyun zhao Manzhou Chi Hongjin lü Guoyu Yang MOE Key laboratory of Cluster Science Beijing Key Laboratory of Photoelectroic/Electrophotonic Conversion MaterialsSchool of Chemistry and Chemical Engineering Beijing Institute of Technology

Establishing the correlation between inter-cluster assembly and auxiliary ligands at the atomic level is crucial for the development of metal cluster *** this work,we report the successful preparation and characterization of three Ag clusters,discrete 0-D Ag51S6Cl3（iPrS）21（TsO）15CH3Cn(0-D Ag51,iPrS-=isopropanethiolate,TsO-=toluenesulfonate),1-D {Ag38S4（iPrS）18（PhCOO）12}_n(1-D Ag38,PHCOO-=benzoate),and 2-D {Ag20（SO4）Cl2（iPrS）10（nO3）6}_n(2-D Ag20),using a delicate auxiliary-ligand-induced *** analyses reveal that the types of auxiliary ligands can readily affect the structure and dimensionality of resulting Ag *** addition of different surface auxiliary ligands from TsO-to PhCOO-and then to nO3-leads to the formation of 0-D Ag51to 1-D Ag38and then to 2-D Ag20clusters under otherwise identical reaction conditions,*** resulting Ag clusters exhibited structure-related optical/luminescence properties and distinct bathochromic shifts as revealed by the temperature-dependent luminescence and single-crystal X-ray diffraction studies.

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