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Multidimensional modulation of light fields via a combination of two-dimensional materials and meta-structures

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Science China(Information Sciences) 2023年第6期66卷 36-52页

作者： Zhipeng ZHENG Yijing HUANG Feng WU Han ZHANG Zheyu FANG School of Physics State Key Laboratory for Mesoscopic PhysicsAcademy for Advanced Interdisciplinary StudiesCollaborative Innovation Center of Quantum MatterNano-optoelectronics Frontier Center of Ministry of EducationPeking University

In recent years, researchers have increasingly directed their attention towards modulating light fields through the unique properties of two-dimensional materials and the free designability of ***, transition metal sulfides, transition metal nitrides, and other two-dimensional materials have emerged as star materials in recent years due to their extraordinary properties that are vastly different from those of traditional three-dimensional materials. As a result, these materials hold immense potential for further exploration and research. Taking advantage of the free designability of meta-structures can be an effective means of unlocking the full potential of 2D materials. Accordingly, this review presents an overview of recent research progress in the area of light field modulation achieved by combining 2D materials with metastructures. The review initially covers the properties of 2D materials, followed by the concepts, principles,design, and preparation of meta-structures. Then the review delves into the concrete examples of the impact and effect of the combination on light field modulation. Lastly, the review concludes with a comprehensive summary and analysis of the current challenges and potential future developments of combining 2D materials with meta-structures.

关键词： two-dimensional materials electromagnetic meta-structures light field modulation surface plasma polarisation surface plasmon

Conductance of a single molecule C_(60)-SnPc heterojunction

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Chinese Chemical Letters 2022年第2期33卷 1074-1076页

作者： Yifan Wang Mingjun Zhong Jie Li Hao Tang Richard Berndt Yajie Zhang Shimin Hou Yongfeng Wang Key Laboratory for the Physics and Chemistry of Nanodevices and Center for Carbon-based Electronics Department of ElectronicsPeking UniversityBeijing 100871China CEMES-CNRS Boîte Postale 94347Toulouse 31055France Institut für Experimentelle und Angewandte Physik Christian-Albrechts-Universität zu KielKiel D-24098Germany Beijing Academy of Quantum Information Sciences Beijing 100193China Institute of Spin Science and Technology South China University of TechnologyGuangzhou 511442China

Geometries of molecule-molecule interfaces strongly influence the current passing from one molecule to another. The contact conductance of molecule-molecule junctions which consist of fullerene and tin phthalocyanine molecules is investigated with a low-temperature scanning tunneling microscope. Two types of molecules are deposited onto Cu(111). Fullerene molecules are transferred to tips through controlled contact of STM tips on molecules. The molecule-molecule junctions are formed by approaching fullereneterminated tips to tin phthalocyanine molecules on Cu(111). Our experimental method can be extended to study the intermolecular charge transport of a range of molecular junctions.

关键词： Single-molecule electronics Switch C_(60) Phthalocyanine STM

Distributed Secure State Estimation of Multi-Agent Systems Under Homologous Sensor Attacks

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IEEE/CAA Journal of Automatica Sinica 2023年第1期10卷 67-77页

作者： Yukun Shi Youqing Wang Jianyong Tuo the College of Information Science and Technology Beijing University of Chemical TechnologyBeijing 100029China IEEE

This paper addresses the problem of distributed secure state estimation for multi-agent systems under homologous sensor *** types of secure Luenberger-like distributed observers are proposed to estimate the system state and attack signal ***,the proposed two observers are applicable to deal with the cases in the presence and absence of time delays during network *** is also shown that the proposed observers can ensure the attack estimations from different agents asymptotically converge to the same *** conditions for guaranteeing the asymptotic convergence of the estimation errors are *** examples are finally provided to demonstrate the effectiveness of the proposed results.

关键词： Consensus-based Luenberger-like observer distributed secure state estimation homologous signal

Tailoring the selective adsorption sites of NiMoO by Ni particles for biomass upgrading assisted hydrogen production

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Journal of Energy Chemistry 2023年第11期86卷 480-489,I0010页

作者： Jia Wu Zhixiang Zhai Tianqi Yu Xizi Wu Shuaiqin Huang Wenqing Cao Yixuan Jiang Jinge Pei Shibin Yin Guangxi Key Laboratory of Electrochemical Energy Materials School of Chemistry and Chemical EngineeringSchool of Physical Science and TechnologyGuangxi UniversityNanning 530004GuangxiChina

5-Hydroxymethylfurfural electrooxidation reaction(HMFOR)is a promising route to produce valueadded chemicals from *** it involves HMF adsorption and C-H/O-H cleavage,understanding the adsorption behavior and catalytic process of organic molecules on catalysts is ***,the selective adsorption sites of NiMoO are tuned by Ni particles for HMFOR-assisted *** and theoretical calculation results indicate that the synergistic interaction between Ni and NiMoO optimizes the adsorption/desorption of HMF/intermediates/2,5-furandicarboxylic acid(FDCA)and promotes the C-H/O-H bond cleavage,thereby improving the HMFOR kinetics(kNiMoO-Ni/kNiMoO=1.97)and FDCA selectivity(99.3%).When coupled as a two-electrode system,it can drive efficient HMF conversion(FDCA yield:98.5%)and H2production(Faradaic efficiency:99.1%)at 1.45 *** work thus offers a strategy to tune the adsorption sites of catalyst for efficient HMFOR-assisted H2production.

关键词： 5-Hydroxymethylfurfural electrooxidation Hydrogen evolution reaction Kinetics Nanowires Catalyst

Luminescent single-molecule magnet of metallofullerene DyErScN@Ih-C80

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Nano Research 2019年第7期12卷 1727-1731页

作者： Mingzhe Nie Jin Xiong Chong Zhao Haibing Meng Kun Zhang Yibo Han Jie Li Bingwu Wang Lai Feng Chunru Wang Taishan Wang Beijing National Laboratory for Molecular Sciences Key Laboratory of Molecular Nanostructure and NanotechnologyInstitute of ChemistryChinese Academy of SciencesBeijing 100190China Beijing National Laboratory of Molecular Science College of Chemistry and Molecular Engineering State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsPeking UniversityBeijing 100871China Soochow Institute for Energy and Materials Innovations (SIEMIS) College of PhysicsOptoelectronics and Energy & Jiangsu Key Laboratory of Advanced Carbon Materials and Wearable Energy TechnologiesSoochow UniversitySuzhou 215006China Wuhan National high Magnetic Field Center and School of Physics Huazhong University of Science and TechnologyWuhan 430074China university of Chinese Academy of Sciences Beijing 100049China

Magneto-luminescent molecules have significant applications in data storage and quantum ***,design of these bi-functional molecules coupled with magnetic behavior and photoluminescence is still *** this work,we report a metallofullerene DyErScN @In-C80 exhibiting single-molecule magnet (SMM) behavior and near-infrared *** DyErScN @Ih-C80,two functional lanthanide metal ions of Dy^3+(SMM function) and Er^3+(luminescent function) are integrated inside a fullerene cage using a trimetallic nitride template,and its structure has been unambiguously characterized by single-crystal X-ray *** measurements revealed that DyErScN @Ih-C80 behaves as a SMM with a blocking temperature up to 9 K resulting from the intramolecular magnetic interaction between Dy^3+ and Er^3+ ***,DyErScN @In-C80 exhibits temperature-dependent near-infrared emission around 1.5 pm with multiple splitting peaks from Er^3+,which arises from the influence of Dy^3+ *** study provides a new strategy to synthesize new magneto-luminescent molecule materials.

关键词： metallofullerene single-molecule magnet near-infrared photoluminescence

HⅠVertical Structure of Nearby Edge-on Galaxies from CHANG-ES

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Research in Astronomy and Astrophysics 2022年第8期22卷 49-62页

作者： Yun Zheng Jing Wang Judith Irwin QDaniel Wang Jiangtao Li Jayanne English Qingchuan Ma Ran Wang Ke Wang Marita Krause Toky H.Randriamampandry Rainer Beck Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China Department of Physics Engineering Physics&AstronomyQueen’s UniversityKingstonONK7L 3N6Canada Astronomy Department University of MassachusettsAmherstMA 01003USA Department of Astronomy University of MichiganAnn ArborMI48109-1107USA Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China Department of Physics and Astronomy University of ManitobaWinnipegManitobaR3T 2N2Canada Max-Planck-Institut für Radioastronomie Auf dem Hügel D-6953121 BonnGermany

We study the vertical distribution of the highly inclined galaxies from the Continuum Halos in Nearby Galaxies—an EVLA Survey(CHANG-ES).We explore the feasibility of photometrically deriving the HⅠdisk scale heights from the moment-0 images of the relatively edge-on galaxies with inclination>80°,by quantifying the systematic broadening effects and thus deriving correction equations for direct *** corrected HⅠdisk scale heights of the relatively edge-on galaxies from the CHANG-ES sample show trends consistent with the quasiequilibrium model of the vertical structure of gas *** procedure provides a convenient way to derive the scale heights and can easily be applied to statistical samples in the future.

关键词： galaxies:ISM galaxies:spiral galaxies:structure

Deep-blue organic light-emitting diodes based on a doublet d-f transition cerium(Ⅲ) complex with 100% exciton utilization efficiency

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Light(Science & Applications) 2020年第1期9卷 521-529页

作者： Liding Wang Zifeng Zhao Ge Zhan Huayi Fang Hannan Yang Tianyu Huang Yuewei Zhang Nan Jiang Lian Duan Zhiwei Liu Zuqiang Bian Zhenghong Lu Chunhui Huang Beijing National Laboratory for Molecular Sciences(BNLMS) State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsBeijing Engineering Technology Research Centre of Active DisplayCollege of Chemistry and Molecular EngineeringPeking University100871 BeijingChina Tianjin Key Lab for Rare Earth Materials and Applications School of Materials Science and EngineeringNankai University300350 TianjinChina Department of Physics Yunnan University2 Cuihu Bei Lu650091 KunmingChina Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education Department of ChemistryTsinghua University100084 BeijingChina

Compared to red and green organic light-emitting diodes(OLEDs),blue OLEDs are still the bottleneck due to the lack of efficient emitters with simultaneous high exciton utilization efficiency(EUE)and short excited-state *** from the fluorescence,phosphorescence,thermally activated delayed fluorescence(TADF),and organic radical materials traditionally used in OLEDs,we demonstrate herein a new type of emitter,cerium(Ⅲ)complex Ce-1 with spin-allowed and parity-allowed d-f transition of the centre Ce^(3+) *** compound exhibits a high EUE up to 100% in OLEDs and a short excited-state lifetime of 42 ns,which is considerably faster than that achieved in efficient phosphorescence and TADF *** optimized OLEDs show an average maximum external quantum efficiency(EQE)of 12.4% and Commission Internationale de L’Eclairage(CIE)coordinates of(0.146,0.078).

关键词： diodes emitter transition

Constrained Density Functional Theory Plus the Hubbard U Correction Approach for the Electronic Polaron Mobility:A Case Study of TiO_(2)

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Chinese Journal of Chemical Physics 2021年第5期34卷 541-551,I0002页

作者： Yue-Chao Wang Hong Jiang Beijing National Laboratory for Molecular Sciences Institute of Theoretical and Computational ChemistryCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

The formation and migration of polarons have important influences on physical and chemical properties of transition metal *** functional theory plus the Hubbard U correction(DFT+U)and constrained density functional theory(cDFT)are often used to obtain the transfer properties for small *** this work we have implemented the cDFT plus the Hubbard U correction method in the projector augmented wave(PAW)framework,andapplied it to study polaron transfer in the bulk phases of TiO_(2).We have confirmed that the parameter U can have significant impact on theoretical prediction of polaronic *** was found that using the Hubbard U calculated by the cDFT method with the same orbital projection as used in DFT+U,one can obtain theoretical prediction of polaronic properties of rutile and anatase phases of TiO_(2) in good agreement with *** work indicates that the cDFT+U method with consistently evaluated U is a promising first-principles approach to polaronic properties of transition metal oxides without empirical input.

关键词： Small polaron Constrained density functinal theory Density functional theory the Hubbard U correction

Nicotinamide adenine dinucleotide(NAD^(+))reduction enabled by an atomically precise Au-Ag alloy nanocluster

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Nano Research 2023年第5期16卷 7770-7776页

作者： Ling Chen Yonglei Du Ying Lv Daoqing Fan Junfei Wu Lingbao Wu Mengting Cui Haizhu Yu Manzhou Zhu Department of Chemistry and Centre for Atomic Engineering of Advanced Materials Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Physical Science and Information Technology and Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized MaterialsAnhui UniversityHefei 230601China Institute of Energy Hefei Comprehensive National Science CenterHefei 230601China

The redox property of the ultrasmall coinage nanoclusters(with several to tens of Au/Ag atoms)has elucidated the electrontransfer capacity of nanoclusters,has been successfully utilized in a variety of redox conversions(such as from CO_(2)to CO).Nevertheless,their biological applications are mainly restricted by the scarcity of atomically precise,water-soluble metal nanoclusters,the limited application(mainly on the decomposition of H_(2)O_(2)in these days).Herein,mercaptosuccinic acid(MSA)protected ultrasmall alloy AuAg nanoclusters were prepared,the main product was determined[Au_(3)Ag_(5)(MSA)_(3)]−by electrospray ionization mass spectrometry(ESI-MS).The clusters can not only mediate the decomposition of H_(2)O_(2)to generate hydroxyl radicals,but is also able to mediate the reduction of nicotinamide adenine dinucleotide(NAD)to its reduced form of *** is the first time that the atomically precise metal nanoclusters were used to mediate the coenzyme *** preliminary mechanistic insights imply the reaction to be driven by the hydrogen bonding between the carboxylic groups(on the surface of MSA)and the amino N–H bonds(on NAD).In this context,the presence of the carboxylic groups,the sub-nanometer size regime(~1 nm),the synergistic effect of the Au-Ag clusters are pre-requisite to the NAD reduction.

关键词： redox-activity alloy AuAg nanocluster nicotinamide adenine dinucleotide(NAD)reduction synergistic effect size-effect