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Electronic structure, optical properties, and lattice dynamics in atomically thin indium selenide flakes

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Nano Research 2014年第10期7卷 1556-1568页

作者： Juan F. Sanchez-Royo Suillermo Munoz-Matutano Mauro Brotons-Gisbert Juan P. Martinez-Pastor Alfredo Segura Andres Cantarero Rafael Mata Josep Canet-Ferrer Gerard Tobias Enric Canadell Jose Marques-Hueso Brian D. Gerardot ICMUV Instituto de Oencia de Materiales Universidad de Valencia P.O. Box 22085 46071 Valencia Spain MALTA-Consolider Team Institut de Ciencia dels Materials-Dpto. de Fisica Apficada Universitat de Valencia E-46100 Burjassot (Valencia) Spain Institut de ciencia de Materials de barcelona (ICMAB-CSIC) Campus de la UAB 08193 Bellaterra Barcelona Spain Institute of Photonics and Quantum Science SUPA Hefiot-Watt University Edinburgh EH14 4AS UK

The progressive stacking of chalcogenide single layers gives rise to two- dimensional semiconducting materials with tunable properties that can be exploited for new field-effect transistors and photonic devices. Yet the properties of some members of the chalcogenide family remain unexplored. Indium selenide （InSe） is attractive for applications due to its direct bandgap in the near infrared, controllable p- and n-type doping and high chemical stability. Here, we reveal the lattice dynamics, optical and electronic properties of atomically thin InSe flakes prepared by micromechanical cleavage. Raman active modes stiffen or soften in the flakes depending on which electronic bonds are excited. A progressive blue-shift of the photoluminescence peaks is observed for decreasing flake thickness （as large as 0.2 eV for three single layers）. First-principles calculations predict an even larger increase in the bandgap, 0.40 eV, for three single layers, and as much as 1.1 eV for a single layer. These results are promising from the point of view of the versatility of this material for optoelectronic applications at the nanometer scale and compatible with Si and III-V technologies.

关键词： indium selenide two-dimensional flakes micro-Raman spectroscopy micro-photoluminescence electronic structure

Heterogeneous catalysts with programmable topologies generated by reticulation of organocatalysts into metal-organic frameworks:The case of squaramide

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Nano Research 2021年第2期14卷 458-465页

作者： Anna Broto-Ribas Claudia Vignatti Alicia Jimenez-Almarza Javier Luis-Barrera Zahra Dolatkhah Felipe Gandara Inhar Imaz Ruben Mas-Balleste Jose Aleman Daniel Maspoch Catalan Institute of Nanoscience and Nanotechnology(ICN2) CSIC and The Barcelona Institute of Science and Technology08193 BarcelonaSpain Inorganic Chemistry department Modulo 7Universidad Autonoma de Madrid28049 MadridSpain Organic Chemistry department Modulo 1Universidad Autonoma de Madrid28049 MadridSpain Materials Science Factory Instituto de Ciencia de Materiales de Madrid(ICMM)Consejo Superior de Investigaciones Cientificas(CSIC)Calle Sor Juana Ines de la Cruz328049 MadridSpain Institute for Advanced Research in Chemical Sciences(IAdChem) Campus Universidad Autonoma de Madrid28049 MadridSpain Institucio Catalana de Recerca i Estudis Avangats(ICREA) 08100 BarcelonaSpain

A well-established strategy to synthesize heterogeneous,metal-organic framework(MOF)catalysts that exhibit nanoconfinement effects,and specific pores with highly-localized catalytic sites,is to use organic linkers containing organocatalytic ***,we report that by combining this linker approach with reticular chemistry,and exploiting three-dimensioanl(3D)MOF-structural data from the Cambridge Structural Database,we have designed four heterogeneous MOF-based catalysts for standard organic *** programmable MOFs are isoreticular versions of pcu IRMOF-16,feu UiO-68 and pillared-pcu SNU-8X,the three most common topologies of MOFs built from the organic linker p.p'-terphenyldicarboxylic acid(tpdc).To synthesize the four squaramide-based MOFs,we designed and synthesized a linker,4,4’-((3,4-dioxocyclobut-1-ene-1,2-diyl)bis(azanedyil))dibenzoic acid(Sq_tpdc),which is identical in directionality and length to tpdc but which contains organocatalytic squaramide *** were chosen because their immobilization into a framework enhances its reactivity and stability while avoiding any self-quenching ***,the four MOFs share the same organocatalytic squaramide moiety,but confine it within distinct pore *** then evaluated these MOFs as heterogeneous H-bonding catalysts in organic transformations:a Friedel-Crafts alkylation and an epoxide *** of them exhibited good performance in both reactions but all showed distinct catalytic profiles that reflect their structural differences.

关键词： reticular chemistry metal-organic frameworks H-bond catalysis squaramide Friedel-Cratts epoxide ring-opening

Precipitation Kinetics on a Nb-V Microalloyed Steel

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Journal of Iron and Steel Research International 2011年第S1期18卷 148-153页

作者： Cartaya Elio Armando Cabrera José María Prado José Manuel departamento de ciencia de materiales e Ingeniería Metalúrgica ETSEIBUniversidad Politécnica de Catalua Av.Diagonal 64708028 BarcelonaSpain departamento de Manufactura y materiales Facultad de Ingeniería MecánicaUniversidad de OrienteSantiago de CubaCuba Fundación CTM Centro Tecnológico Av.Bases de Manresa 108242 ManresaSpain

The precipitation kinetics in a low carbon high strength low alloy (HSLA) steel,microalloyed with V+Nb has been studied by using the stress relaxation *** technique was carried out in a dynamic dilatometer and allows to determine the onset and finishing precipitation times in hot deformed *** evolution of the precipitates was also observed using field emission scanning electron microscopy (FESEM) on samples quenched at different times at given *** is completed with the predictions by the thermodynamic software FactSage to identify stable precipitate phases under equilibrium *** confirm the feasibility of the stress relaxation technique as an efficient method for investigating precipitation kinetics.

关键词： stress relaxation microalloyed steels precipitation FESEM

Strain Influence on the Precipitation Kinetic Nb-V Microalloyed HSLA Steel

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Journal of Iron and Steel Research International 2011年第S1期18卷 278-281页

作者： Cartaya Elio Armando Cabrera José María Prado José Manuel departamento de ciencia de materiales e Ingeniería Metalúrgica ETSEIBUniversidad Politécnica de Catalu a Av.Diagonal 64708028 BarcelonaSpain departamento de Manufactura y materiales Facultad de Ingeniería MecánicaUniversidad de Oriente90400 Santiago de CubaCuba Fundación CTM Centro Tecnológico Av.Bases de Manresa 108242 ManresaSpain

The strain induced effect on the precipitation kinetics of a high strength low alloy (HSLA) steel microalloyed with Nb-V was *** stress relaxation method was employed to determine the dependence of the precipitation-time-temperature curves (PTT) on previous *** tests were performed over a temperature range of 850 to 1150 oC at a constant strain rate of 0.1 s-1 at three deformation levels,namely 5,15 and 25 *** emission scanning electron microscopy (FESEM) was used to study the progress of precipitation on samples obtained by interrupted relaxation test at different *** display the acceleration kinetics at increasing *** models are discussed and compared with the present experimental results.

关键词： strain induced precipitation kinetic HSLA stress relaxation PTT

A review on synthesis of graphene,h-BN and MoS2 for energy storage applications:Recent progress and perspectives

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Nano Research 2019年第11期12卷 2655-2694页

作者： Rajesh Kumar Sumanta Sahoo Ednan Joanni Rajesh Kumar Singh Ram Manohar Yadav Rajiv Kumar Verma Dinesh Pratap Singh Wai Kian Tan Angel Perez del Pino Stanislav A.Moshkalev Atsunori Matsuda department of Eletrical and Electronic Information Engineering Toyohashi University of Technologys1-1 HibarigaokaTempaku-chaToyohashiAichi 441-8580Japan department of Applied Chemistry Indian Institute of Technology(ISM) Dhanbad826004JharkhandIndia Centre for Information Technology Renato Archer(CTI) Campinas 13069-901Brazil School of Physical and Material Sciences Central University of Himachal Pradesh(CUHP)KangraDharamshala 176215HR India department of Plhysics VSSD CollegeKanpur 208002India International College Osaka University1-2 MachikaneyamachoToyonaka shiOsaka 560-0043Japan department of Physics and Milermium Institute for Research in Optics(MIRO) University of SantiagoAvenida Ecuador 3493Estacion CentralSantiago 9170124Chile Institute of Liberal Arts and Sciences Toyohashi University of Technology1-1 HibarigaokaTempaku choToyohashiAichi 441-8580 Japan instituto de ciencia de materiales de barcelona Consejo Superior de Irvestigaciones Cientificas(ICMAB-CSIC)Campus UABBllaterra08193 BarcelonaSpain Centre for Semiconductor Components and Nanotechnology(CCS Nano) Uniersity of Campinas(UNICAMP)Campinas 13083-870Brazil

The significance of graphene and its two-dimensional(2D)analogous inorganic layered materials especially as hexagonal boron nitride(h-BN)and molybdenum disulphide(MoS2)for“clean energy”applications became apparent over the last few years due to their extraordinary *** this review article we study the current progress and selected challenges in the syntheses of graphene,h-BN and MoS2 including energy storage applications as supercapacitors and *** substrates/catalysts(metals/insulator/semiconducting)have been used to obtain graphene,h-BN and MoS2 using different kinds of *** most widespread methods for synthesis of graphene,h-BN and MoS2 layers are chemical vapor deposition(CVD),plasma-enhanced CVD,hydro/solvothermal methods,liquid phase exfoliation,physical methods *** research has shown that graphene,h-BN and MoS2 layered materials modified with metal oxide can have an insightful influence on the performance of energy storage devices as supercapacitors and *** review article also contains the discussion on the opportunities and perspectives of these materials(graphene,h-BN and MoS2)in the energy storage *** expect that this witen review article including recent research on energy storage will help in generating new insights for further development and practical applications of graphene,h-BN and MoS2 layers based materials.

关键词： graphene norganic layered materials hierarchical structures energy storage supercapacitor battery

Effect of Q＆P Process on 0.15C-MnSi Steels

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材料科学与工程（中英文A版） 2016年第2期6卷 113-116页

作者： Andrea Di Schino Paolo Emilio Di Nunzio Sabrina Mengaroni Pablo Rodriguez-Calvillo Jose Maria Cabrera Dipartimento di Ingegneria Universith degli Studi di Perugia Via G. Duranti 93 Perugia 06125 Italy Centro Sviluppo Materiali SpA Via di Castel Romano 100Roma 00128 Italy Arcelor Mittal Global R&D Gent Belgium departamento de ciencia de los materiales e Ingenieria Metal{trgica Universitat Politecnica de Catalunya Barcelona Spain