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Structural and chemical transformations of CuZn alloy nanoparticles under reactive redox atmospheres:An in situ TEM study

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Nano Research 2024年第7期17卷 6265-6273页

作者： Shengnan Yue Qian Li Chaobin Zeng Alexander Klyushin Ramzi Farra Marc-Georg Willinger Xing Huang College of Chemistry Fuzhou UniversityFuzhou 350108China Qingyuan innovation Laboratory Quanzhou 362801China Hitachi High-Tech Scientific Solutions(Beijing)Co. Ltd.Beijing 100015China MAX IV Laboratory Lund UniversityBox 11822100 LundSweden Department of Inorganic Chemistry Fritz-Haber Institute of Max Planck SocietyBerlin 14195Germany Department of Chemistry Technical University of MunichGarching 85748Germany

Alloying metals to form intermetallics has been proven effective in tuning the chemical properties of metal-based ***,intermetallic alloys can undergo structural and chemical transformations under reactive conditions,leading to changes in their catalytic *** and understanding these transformations are crucial for establishing relevant structureperformance relationships and for the rational design of alloy-based *** this work,we used CuZn alloy nanoparticles(NPs)as a model material system and employed in situ transmission electron microscopy(TEM)to investigate the structural and chemical changes of CuZn NPs under H_(2),O_(2)and their *** results show how CuZn NPs undergo sequential transformations in the gas mixture at elevated temperatures,starting with gradual leaching and segregation of Zn,followed by oxidation at the NP *** remaining copper at the core of particles can then engage in dynamic behavior,eventually freeing itself from the zinc oxide *** structural dynamics arises from an oscillatory phase transition between Cu and Cu_(2)O and is correlated with the catalytic water formation,as confirmed by in situ mass spectrometry(MS).Under pure H_(2)or O_(2)atmosphere,we observe different structural evolution pathways and final chemical states of CuZn NPs compared to those in the gas *** results clearly demonstrate that the chemical state of alloy NPs can vary considerably under reactive redox atmospheres,particularly for those containing elements with distinct redox properties,necessitating the use of in situ or detailed ex situ characterizations to gain relevant insights into the states of intermetallic alloy-based catalysts and structure-activity relationships.

关键词： In situ transmission electron microscopy(TEM) CuZn alloy structural and chemical transformations redox atmosphere

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UNCOVERING BENEFITS AND RISKS OF INTEGRATED PRODUCT SERVICE OFFERINGS-USING A CASE OF TECHNOLOGY ENCAPSULATION

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Journal of systems Science and systems Engineering 2013年第4期22卷 421-439页

作者： Tomohiko SAKAO Anna HRWALL RNNBCK Gunilla LUNDH SANDSTRM Division of Environmental Technology and Management Department of Management and Engineering Division of Industrial Economics Department of Management and EngineeringLinkoping UniversitySweden Unit of Integrated Product Development Department of Machine DesignKTH Royal Institute of TechnologySweden

The objective of this article is to uncover benefits and risks of Integrated Product Service Offering （IPSO） in a systematic manner. To do so, it adopts an explorative longitudinal in-depth case study （development of an IPSO based on a new technology） and adds insights to the existing literature. The article first proposes a theoretical and generic framework termed the PCP （Provider - Customer - Product） triangle with associated information flow and uncertainty. Second, various types of benefits and risks are presented based on the framework. Among others, the benefit of keeping IPR （Intellectual Property Rights） with the provider and the risk of regulation change are new findings from the case study. In addition, the case study reveals that IPSO is regarded as a positive contributor to innovation. Applying the framework and classification of benefits and risks as norms to other cases has yet to be done for verification. However, the framework contributes scientifically to a better understanding of the benefits and risks of IPSO. In addition, this framework is advantageous with its easiness to understand, which contributes practically to the dissemination of IPS0 insight to industry.

关键词： Product/service system (PSS) new technology intellectual property right (IPR) time to market innovation uncertainty

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A new approach for determining GND and SSD densities based on indentation size effect:An application to additive-manufactured Hastelloy X

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Journal of Materials Science & Technology 2022年第1期96卷 295-307页

作者： Luqing Cui Cheng-Han Yu Shuang Jiang Xiaoyu Sun Ru Lin Peng Jan-Erik Lundgren Johan Moverare Division of Engineering Materials Department of Management and EngineeringLinköping UniversityLinköping SE-58183Sweden Siemens Energy AB Finspång SE-61231Sweden

Dislocation plays a crucial role in controlling the strength and plasticity of bulk ***,determining the densities of geometrically necessary dislocations(GNDs)and statistically stored dislocations(SSDs)is one of the classical problems in material research for several ***,we proposed a new approach based on indentation size effect(ISE)and strengthening *** approach was performed on a laser powder bed fused(L-PBF)Hastelloy X(HX),and the results were verified by the Hough-based EBSD and modified Williamson-Hall(m-WH)***,to better understand the new approach and essential mechanisms,an in-depth investigation of the microstructure was *** distribution of dislocations shows a clear grain orientation-dependent:low density in largepreferentially orientated grains while high density in fineorientated *** increment of strengthening in L-PBF HX is attributed to a huge amount of *** slip is the main operative deformation mechanism during indentation tests,and the slip step patterns depend mostly on grain orientations and stacking fault *** study provides quantitative results of GND and SSD density for L-PBF HX,which constructs a firm basis for future quantitative work on other metals with different crystal structures.

关键词： Microstructure characterization Indentation size effect Hastelloy X Geometrically necessary dislocation Statistically stored dislocation

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Zeolite A synthesized from alkaline assisted pre-activated halloysite for efficient heavy metal removal in polluted river water and industrial wastewater

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Journal of Environmental Sciences 2017年第6期29卷 254-262页

作者： Qingpeng Meng Hong Chen Junzhong Lin Zhang Lin Junliang Sun Key Laboratory of Orogenic Belts and Crustal Evolution Ministry of EducationSchool of Earth and Space SciencesPeking UniversityBeijing 100871China Berzelii Center EXSELENT on Porous Materials Department of Materials and Environmental ChemistryStockholm UniversitySE-106 91 StockholmSweden School of Environment and Energy South China University of TechnologyThe Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters(Ministry of Education)Guangzhou Higher Education Mega CenterGuangzhou 510006China College of Chemistry and Molecular Engineering Peking UniversityBeijing100871China

High quality zeolite A was synthesized through a hydrothermal process using alkaline- assisted pre-activated halloysite mineral as the alumina and silica source. The synthesis conditions employed in this study were finely tuned by varying the activating temperature, sodium hydroxide content, water content and Si/A1 ratio. The obtained zeolite A showed excellent adsorption properties for both single metal cation solutions and mixed cation solutions when the concentrations of the mixed cations were comparable with those in polluted natural river water and industrial wastewater. High adsorptive capacities for Ag （123.05 rag/g） and Pb2＋（227.70 mg/g） were achieved using the synthesized zeolite A. This observation indicates that the zeolite A synthesized from alkaline-assisted pre-activated halloysite can be used as a low-cost and relatively effective adsorbent to purify heavy metal cation polluted natural river water and industrial wastewater.

关键词： ZeoliteHeavy metalRiver waterIndustrial wastewater

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The materials genome and CALPHAD

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Chinese Science Bulletin 2014年第15期59卷 1635-1640页

作者： John gren Materials Science and Engineering The Royal Institute of Technology

The mapping of the human genome is an important basis for the development of new medicals and medical ***,it has attracted tremendous research funding over the last *** June2011,the Materials Genome Initiative was announced by the US President Obama as collaboration on modeling and advanced materials ***,the materials genome was given a rather vague definition in the ***,the materials genome should be defined in analogy with biological genomes and one may then conclude that:at any moment,the performance of a specific material depends on its chemical composition(inherent property stored in its genome)and its environment(external interactions–processing–conditions during usage).The materials genome should thus be defined as a set of information encoded in the language of thermodynamics obtained by careful assessment of experimental data and quantum mechanical calculations from which certain conclusions about the material can be *** CALPHAD databases contain the thermodynamic and kinetic properties of a materials *** databases allow the prediction of materials structure as well as its response to processing and usage conditions,and are major parts of integrated computational materials engineering.

关键词：材料数据库人类基因组相图计算量子力学计算基因组计划动力学性质科研经费美国总统

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Resource management in radio access and IP-based core networks for IMT Advanced and Beyond

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Science China(Information Sciences) 2013年第2期56卷 102-117页

作者： SU Gang HIDELL Markus ABRAHAMSSON Henrik AHLGREN Bengt LI Dan SJDIN Peter TANYINGYONG Voravit XU Ke Department of Electronics and Information Engineering Huazhong University of Science and Technology School of Information and Communication Technology KTH Royal Institute of Technology

The increased capacity needs, primarily driven by content distribution, and the vision of Internet-of-Things with billions of connected devices pose radically new demands on future wireless and mobile systems. In general the increased diversity and scale result in complex resource management and optimization problems in both radio access networks and the wired core network infrastructure. We summarize results in this area from a collaborative Sino-swedish project within IMT Advanced and Beyond, covering adaptive radio resource management, energy-aware routing, OpenFlow-based network virtualization, data center networking, and access network caching for TV on demand.

关键词： IMT Advanced and Beyond resource management resource optimization traffic engineering network virtualization

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Superior low cycle fatigue property from cell structures in additively manufactured 316L stainless steel

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Journal of Materials Science & Technology 2022年第16期111卷 268-278页

作者： Luqing Cui Dunyong Deng Fuqing Jiang Ru Lin Peng Tongzheng Xin Reza Taherzadeh Mousavian Zhiqing Yang Johan Moverare Department of Management and Engineering Division of Engineering MaterialsLinköping UniversityLinköping SE-58183Sweden Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering The University of New South WalesSydneyNSW 2052Australia I-Form Advanced Manufacturing Research CentreDublin City UniversityDublin 9Ireland Ji Hua Laboratory Foshan 528200China

We have investigated the low cycle fatigue(LCF)properties and the extent of strengthening in a dense additively manufactured stainless steel containing different volume fractions of cell structures but having all other microstructure characteristics the *** samples were produced by laser powder bed fusion(L-PBF),and the concentration of cell structures was varied systematically by varying the annealing ***-controlled fatigue experiments performed on samples with a high fraction of cell structures reveal an up to 23 times increase in fatigue life compared to an essentially cell-free sample of the same grain *** electron microscopy characterizations reveal that the cell structures serve as the soft barriers to the dislocation propagation and the partials are the main carrier for cyclic *** cell structures,stabilized by the segregated atoms and misorientation between the adjacent cells,are retained during the entire plastic deformation,hence,can continuously interact with dislocations,promote the formation of nanotwins,and provide massive 3D network obstacles to the dislocation *** compositional micro-segregation caused by the cellular solidification features serves as another nonnegligible strengthening mechanism to dislocation ***,the cell structures with a high density of dislocation debris also appear to act as dislocation nucleation sites,very much like coherent twin *** work indicates the potential of additive manufacturing to design energy absorbent alloys with high performance by tailoring the microstructure through the printing process.

关键词： Additive manufacturing 316L stainless steel Fatigue behavior Cellular structure Nanotwins

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Double-brooding and annual breeding success of great tits in urban and forest habitats

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Current Zoology 2022年第5期68卷 517-525页

作者： Boglárka Bukor Gábor Seress Ivett Pipoly Krisztina Sándor Csenge Sinkovics ErnőVincze András Liker Behavioral Ecology Research Group Center for Natural SciencesUniversity of PannoniaVeszprém H-8200Hungary MTA-PE Evolutionary Ecology Research Group University of PannoniaVeszprém H-8200Hungary MTA-ELTE Comparative Ethology Research Group BudapestHungary Department of Biology Theoretical Population Ecology and Evolution GroupLund UniversityLundSweden

Urban areas differ from natural habitats in several environmental features that influence the characteristics of animals living *** example,birds often start breeding seasonally earlier and fledge fewer offspring per brood in cities than in natural ***,longer breeding seasons in cities may increase the frequency of double-brooding in urban compared with nonurban populations,thus potentially increasing urban birds’annual reproductive output and resulting in lower habitat difference in reproductive success than estimated by studies focusing on first clutches *** this study,we investigated 2 urban and 2 forests great tit Parus major populations from 2013 to *** compared the probability of double-brooding and the total number of annually fledged chicks per female between urban and forest habitats,while controlling for the effects of potentially confounding *** was a trend for a higher probability of double-brooding in urban(44%of females)than in forest populations(36%),although this was not consistent between the 2 urban *** produced significantly fewer fledglings annually in the cities than in the forest sites,and this difference was present both within single-and double-brooded ***,double-brooded urban females produced a similar number of fledglings per season as single-brooded forest *** results indicate that double-brooding increases the reproductive success of female great tits in both habitats,but urban females cannot effectively compensate in this way for their lower reproductive output per ***,other mechanisms like increased post-fledging survival can mitigate habitat differences in reproductive success.

关键词： annual reproductive success habitat differences population self-sustainability second brood urban conservation

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4^(th) generation synchrotron source boosts crystalline imaging at the nanoscale

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Light(Science & Applications) 2022年第4期11卷 662-673页

作者： Peng Li Marc Allain Tilman A.Grunewald Marcus Rommel Andrea Campos Dina Carbone Virginie Chamard Aix-Marseille Univ CNRSCentrale MarseilleInstitut FresnelMarseilleFrance Nanofabrication Laboratory Department of Microtechnology and NanoscienceMC2Chalmers University of TechnologySE-41296 GothenburgSweden Aix Marseille Univ CNRSCentrale MarseilleFSCM(FR1739)CP2M13397 MarseilleFrance. MAX IV Laboratory Fotongatan 222594 LundSweden Present address:Diamond Light Source Harwell Science and Innovation CampusFermi AveDidcot OX110DEUK

New 4^(th)-generation synchrotron sources,with their increased bilince,promise to greatly improve the performances of coherent X-ray *** perspective is of major interest for crystal microscopy,which aims at revealing the 3D crystalline structure of matter at the nanoscale,an approach strongly limited by the available coherent *** results,based on Bragg ptychography experiments performed at the frst 4-generation synchrotron source,demonstrate the possibility of retrieving a high-quality image of the crystalline sample,with unprecedented ***,the larger available coherent flux produces datasets with enough information to overcome experimental limitations,such as strongly deteriorated scanning *** show this achievement would not be posible with 30-generation sources,a limit that has inhibited the development of this otherwise powerful microscopy method,so ***,the advent of next-generation synchrotron sources not only makes Bragg ptychography suitable for high throughput studies but also strongly relaxes the associated experimental constraints,making it compatible with a wider range of experimental set-ups at the new synchrotrons.

关键词： crystalline coherent source

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Extracting structural motifs from pair distribution function data of nanostructures using explainable machine learning

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npj Computational Materials 2022年第1期8卷 2053-2063页

作者： Andy S.Anker Emil T.S.Kjær Mikkel Juelsholt Troels Lindahl Christiansen Susanne Linn Skjærvø Mads Ry Vogel Jørgensen Innokenty Kantor Daniel Risskov Sørensen Simon J.L.Billinge Raghavendra Selvan Kirsten M.Ø.Jensen Department of Chemistry and Nano-Science Center University of Copenhagen2100CopenhagenDenmark Department of Materials University of OxfordParks RoadOxfordUK Department of Chemistry&iNANO Aarhus University8000AarhusDenmark MAX IV Laboratory Lund University22484LundSweden Department of Physics Technical University of Denmark2880LyngbyDenmark Department of Applied Physics and Applied Mathematics Columbia UniversityNew YorkNY10027USA Condensed Matter Physics and Materials Science Department Brookhaven National LaboratoryUptonNY11973USA Department of Computer Science University of Copenhagen2100CopenhagenDenmark Department of Neuroscience University of Copenhagen2200CopenhagenDenmark

Characterization of material structure with X-ray or neutron scattering using *** Distribution Function(PDF)analysis most often rely on refining a structure model against an experimental ***,identifying a suitable model is often a ***,automated approaches have made it possible to test thousands of models for each dataset,but these methods are computationally expensive and analysing the output,*** structural information from the resulting fits in a meaningful way,is *** Machine Learning based Motif Extractor(ML-MotEx)trains an ML algorithm on thousands of fits,and uses SHAP(SHapley Additive exPlanation)values to identify which model features are important for the fit *** use the method for 4 different chemical systems,including disordered nanomaterials and ***-MotEx opens for a type of modelling where each feature in a model is assigned an importance value for the fit quality based on explainable ML.

关键词： explain structural meaningful

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