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Intercalation and hybrid heterostructure integration of two-dimensional atomic crystals with functional organic semiconductor molecules

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Nano Research 2020年第11期13卷 2917-2924页

作者： Wen He Han Zang Songhua Cai Zhangyan Mu Cheng Liu Mengning Ding Peng Wang xinran Wang Key Laboratory of Mesoscopic Chemistry School of Chemistry and Chemical EngineeringNanjing UniversityNanjing210093China National Laboratory of Solid State Microstructures Nanjing UniversityNanjing210093China School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing210093China Jiangsu Key Laboratory of Artificial Functional Materials College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing210093China Department of Applied Physics The Hong Kong Polytechnic UniversityHung Hom999077KowloonHong KongChina Research Center for Environmental Nanotechnology(ReCENT) Nanjing UniversityNanjing210023China

Van der Waals(vdW)integration affords semiconductor heterostructures without constrains of lattice matching and opens up a new realm of functional devices by design.A particularly interesting approach is the electrochemical intercalation of two-dimensional(2D)atomic crystal and formation of superlattices,which can provide scalable production of novel vdW ***,this approach has been limited to the use of organic cations with non-functional aliphatic chains,therefore failed to take the advantage of the vast potentials in molecular functionalities(electronic,photonic,magnetic,etc.).Here we report the integration of 2D crystal(MoS_(2),WS_(2),highly oriented pyrolytic graphite(HOPG),WSe_(2) as model systems)with electrochemically inert organic molecules that possess semiconducting characteristics(including perylene-3,4,9,10-tetracarboxylic dianhydride(PTCDA),pentacene and fullerene),through on-chip electrochemical *** unprecedented long-range spatial feature of intercalation has been achieved,which allowed facile assembly of a vertical MoS_(2)-PTCDA-Si *** intercalated heterostructure shows significant modulation of the lateral transport,and leads to a molecular tunneling characteristic at the vertical *** general intercalation of charge neutral and functional molecules defines a versatile platform of inorganic/organic hybrid vdW heterostructures with significantly extended molecular functional building blocks,holding great promise in future design of nano/quantum devices.

关键词： transition metal dichalcogenide electrochemical intercalation perylene-3,4,9,10-tetracarboxylic dianhydride(PTCDA) organic semiconductor inorganic/organic heterostructure

Amphiphilic block copolymers directed synthesis of mesoporous nickel-based oxides with bimodal mesopores and nanocrystal-assembled walls

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Chinese Chemical Letters 2019年第12期30卷 2003-2008页

作者： Yuan Ren Xuanyu Yang xinran Zhou Wei Luo Yi Zhang Xiaowei Cheng Yonghui Deng Department of Chemistry State Key Laboratory of Molecular Engineering of PolymersShanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsiChEMFudan UniversityShanghai 200433China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China School of Materials Science and Energy Engineering Foshan UniversityFoshan 528000China

Mesoporous late-transition metal oxides have great potential in applications of energy,catalysis and chemical sensing due to their unique physical and chemical ***,their synthesis via the flexible and scalable soft-template method remain a great challenge,due to the weak organic-inorganic interaction between the frequently used surfactants(e.g.,Pluronic-type block copolymers) and metal oxide precursors,and the low crystallization temperature of metal *** this study,ordered mesoporous NiO with dual mesopores,high surface area and well-interconnected crystalline porous frameworks have been successfully synthesized via the facile solvent evaporation-induced co-assembly(EICA) method,by using lab-made amphiphilic diblock copolymer polystyrene-b-poly(4-vinylpyridine)(PS-b-P4 VP) as both the structure-directing agent(the soft template) and macromolecular chelating agents for nickel species,THF as the solvent,and nickel acetylacetonate(Ni(acac)2) as inorganic ***,by using Ni(acac)2 and Fe(acac)3 as the binary precursors,ordered mesoporous Fedoped NiO materials can be obtained,which have bimodal mesopores of large mesopores(32.5 nm) and secondary mesopores(4.0-11.5 nm) in the nanocrystal-assembled walls,high specific surface areas(~74.8 m^2/g) and large pore value(~0.167 cm^3/g).The obtained mesoporous Fe-doped NiO based gas sensor showed superior ethanol sensing performances with good sensitivity,high selectivity and fast response-recovery dynamics.

关键词： Block copolymer Co-assembly Metal oxides Mesoporous Gas sensing

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Experimental Study on Influencing Factors of Resistance Coefficient and Residual Resistance Coefficient in Oilfield Z

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World Journal of Engineering and Technology 2019年第2期7卷 270-281页

作者： xinran Wang Lizhen Ge Dong Liu Qin Zhu Bin zheng Tianjin Branch of CNOOC (China) Limited Tianjin China

In order to clarify the major influence factors of resistance coefficient and residual resistance coefficient, so as to provide the basis for optimizing the polymer flooding schemes in oilfield Z of Bohai Sea, artificial cores were made by simulated the characteristic parameters of real reservoir and the spacing of production-injection wells. The main parameters considered include reservoir permeability, polymer solution concentration and polymer injection rate. Core experiment of polymer flooding was taken by considering all the main parameters. The result showed that resistance coefficient and residual resistance coefficient decrease with the increase of core permeability. Resistance coefficient and residual resistance coefficient increase with the increase of concentration of polymer solution. The increment of displacement pressure in low permeability core is higher than in medium and high permeability core. The resistance coefficient increase with higher displacing velocity, and the increment in high permeability core is higher than in low permeability?core. The displacement velocity has little effect on the residual resistance coefficient. The experimental results can effectively guide the formulation of polymer flooding scheme in offshore oilfields, and optimize the appropriate injection rate and concentration of polymer solution for different properties of reservoirs, thus ensuring the effectiveness of polymer flooding in offshore oilfields.

关键词： Resistance Coefficient Residual Resistance Coefficient Polymer Flooding Laboratory Experiment Offshore Oilfield

Evaluation of Countries' Capacities for Addressing Climate Change in the Post-Paris Era

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Chinese Journal of Urban and Environmental Studies 2022年第1期10卷 44-60页

作者： JI Zhixuan WANG Mou YANG xinran KANG Wenmei University of Chinese Academy of Social Sciences Research Centre for Sustainable Development Chinese Academy of Social Sciences Research Institute for Eco-civilization Chinese Academy of Social Sciences Greenpeace

The Paris Agreement signed in 2015 basically established the post-2020 international climate system. The agreement no longer emphasizes the differences between countries of the North and South. It requested each country to outline and communicate their post-2020 climate actions,which were legally termed as “nationally determined contributions”(NDCs). However, in the process of negotiating the implementation rules and regulations, there is still a big divide between developing and developed countries. Thus it is important to evaluate countries’ responsibilities,obligations and capacities for addressing climate change in the post-Paris era. By adopting the Delphi method, this paper establishes a more comprehensive index system to quantitatively evaluate countries’ capacities for addressing climate change, and to further identify and determine their capacities under the Paris Agreement. According to the evaluation results, there is still a large gap between developed and developing countries in their capacities for addressing climate change. Developing countries with weak capacities fall behind mainly in terms of the industrialization process, Human Development Index(HDI) and urbanization rate. Developed countries with strong capacities lack commitments and actions in terms of helping developing countries to mitigate and adapt to climate change. This paper, by expanding the use of the Delphi method with a multi-dimensional evaluation system that includes a historical responsibility index, attempts to provide a reference for differentiating countries’ capacities and responsibilities in global climate governance, and to promote a more equitable and reasonable global climate governance system.

关键词： Climate change capacity evaluation index system

Angle-selective perfect absorption with two-dimensional materials

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Light(Science & Applications) 2015年第1期4卷 59-64页

作者： Linxiao Zhu Fengyuan Liu Hongtao Lin Juejun Hu Zongfu Yu xinran Wang Shanhui Fan Department of Applied Physics Stanford UniversityStanfordCA 94305USA National Laboratory of Solid State Microstructures School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Department of Materials Science and Engineering Massachusetts Institute of TechnologyMA 02139USA Department of Electrical and Computer Engineering University of Wisconsin-MadisonMadisonWI 53706USA Department of Electrical Engineering Ginzton LaboratoryStanford UniversityStanfordCA 94305USA

Two-dimensional(2D)materials have great potential in photonic and optoelectronic ***,the relatively weak light absorption in 2D materials hinders their application in practical ***,we propose a general approach to achieve angleselective perfect light absorption in 2D *** a demonstration of the concept,we experimentally show giant light absorption by placing large-area single-layer graphene on a structure consisting of a chalcogenide layer atop a mirror and achieving a total absorption of 77.6%in the mid-infrared wavelength range(~13μm),where the graphene contributes a record-high 47.2%absorptivity of mid-infrared *** of such an angle-selective thin optical element is important for solar and thermal energy harvesting,photo-detection and sensing *** study points to a new opportunity to combine 2D materials with photonic structures to enable novel device applications.

关键词： angle-selective perfect absorption angle-selective thin optical element graphene mid-infrared two-dimensional materials

High‑Resolution and Multidimensional Phenotypes Can Complement Genomics Data to Diagnose Diseases in the Neonatal Population

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Phenomics 2023年第2期3卷 204-215页

作者： Tiantian Xiao xinran Dong Yulan Lu Wenhao Zhou Division of Neonatology Children’s Hospital of Fudan UniversityNational Children’s Medical Center399 Wanyuan RoadShanghai 201102China Center for Molecular Medicine Pediatric Research InstituteChildren’s Hospital of Fudan UniversityNational Children’s Medical CenterShanghai 201102China Department of Neonatology Chengdu Women’s and Children’s Central HospitalSchool of MedicineUniversity of Electronic Science and Technology of ChinaChengdu 610000China

Advances in genomic medicine have greatly improved our understanding of human ***,phenome is not well ***-resolution and multidimensional phenotypes have shed light on the mechanisms underlying neonatal diseases in greater details and have the potential to optimize clinical *** this review,we first highlight the value of analyzing traditional phenotypes using a data science approach in the neonatal *** then discuss recent research on high-resolution,multidimensional,and structured phenotypes in neonatal critical ***,we briefly introduce current technologies available for the analysis of multidimensional data and the value that can be provided by integrating these data into clinical *** summary,a time series of multidimensional phenome can improve our understanding of disease mechanisms and diagnostic decision-making,stratify patients,and provide clinicians with optimized strategies for therapeutic intervention;however,the available technologies for collecting multidimensional data and the best platform for connecting multiple modalities should be considered.

关键词： Multidimensional phenotype Neonatal phenome Personalized medicine Neonatal diseases

Research on wavelength conversion of triangular pulses with variable symmetry based on SPM effect

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Optoelectronics Letters 2023年第8期19卷 449-454页

作者： YUAN Jin LIU Qisong MEI Ying XU Xiuxiu WANG Yujie BA xinran State Key Laboratory of Media Convergence and Communication Communication University of ChinaBeijing 100044China

The generation of periodic triangular waveform with variable symmetrical coefficient based on a dual-parallel Mach-Zehnder modulator(DP-MZM) is demonstrated in this *** properly setting the modulation index and bias points of DP-MZM,desired symmetric/asymmetric triangular waveforms can be *** applying the generated triangular waveform into an amplitude modulator(AM),a single-period signal can be extracted to explore the optical wavelength conversion induced by the self-phase modulation(SPM) effect in a high nonlinear fiber(HNLF).Wavelength shifts of triangular waveforms with different coefficients(10%,20%,30%,40% and 50%) are *** addition,the influence of key parameters of HNLF on the wavelength conversion is analyzed in detail.

关键词： modulator triangular effect

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U1 small nuclear ribonucleoprotein is essential for early larval development in silkworm, Bombyx mori

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Insect Science 2022年第2期29卷 379-387页

作者： Xiaoqian Zhang Dehong Yang Xu Yang xinran Zhang Yong Zhang Yongping Huang Shengxiang Zhang Zulian Liu College Forestry Shangdong Agriculture UniversityShangdong ProvinceTaianChina Key Laboratory of Insect Developmental and Evolutionary Biology Center for Excellence in Molecular Plant SciencesShanghai Institute of Plant Physiology and EcologyChinese Academy of SciencesShanghaiChina CAS Center for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijingChina Soochow University SuzhouJiangsu ProvinceChina

U1 small nuclear ribonucleoproteins(U1 snRNP)associates with 5ʹsplice sites in the form of ribonucleoprotein particles and is highly conserved among *** physiological functions of U1 snRNP in a lepidopteran model insect Bombyx mori is mostly ***,we showed that U1 snRNP plays an important role in the development of *** of U1 snRNP in silkworm showed either delayed or stationary 1st instar larva development compared with the wild-type group.U1 snRNP deletion mutants exhibited abnormal cellular phenotypes with enlarged cell nucleus,scant cytoplasm and enlarged ***-seq analysis revealed that genes involved in metabolic pathway,biosynthesis of secondary metabolites and steroid hormone biosynthesis were significantly affected by U1 snRNP *** together,our study suggests that U1 snRNP homeostasis plays an important role in silkworm development.

关键词： CRISPR/Cas9 development ecdysone silkworm U1 snRNP

Ordered porous metal oxide semiconductors for gas sensing

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Chinese Chemical Letters 2018年第3期29卷 405-416页

作者： xinran Zhou Xiaowei Cheng Yongheng Zhu Ahmed A. Elzatahry Abdulaziz Alghamdi Yonghui Deng Dongyuan Zhao Department of Chemistry State Key Laboratory of Molecular Engineering of Polymers Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials iChEM Fudan University Shanghai 200433 China College of Food Science and Technology Shanghai Ocean University Shanghai 201306 China Materials Sdence and Technology Program College of Arts and Sdences Qatar University Doha 2713 Qatar Center for Advanced Materials Qatar University Doha 2713 Qatar Department of Chemistry College of Science King Saud University Riyadh 11451 Saudi Arabia State Key Lab of Transducer Technology Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China

Among various gas sensing materials, metal oxide semiconductors have shown great potential as resistive type sensors. The ordered porous structural metal oxide semiconductors with well-defined meso- or macro-pores chemically synthesized via soft-templating method and nanocasting strategy have high porosity, highly interconnected pore channels and high surface area with enormous active sites for interacting with gaseous molecules. These features enable them good performance in gas sensing, including high sensitivity, fast response and recovery, good selectivity. This review gives a comprehensive summary about the porous metal oxides with focus on the synthesis methods, structure related properties, as well as the modification strategies for gas sensing improved performances.

关键词： Porous materials Metal oxides Templating-synthesis Gas sensing

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