Search results for "2D material"

showing 5 items of 25 documents

Deterministic Modification of CVD Grown Monolayer MoS2 with Optical Pulses

2021

| openaire: EC/H2020/820423/EU//S2QUIP | openaire: EC/H2020/834742/EU//ATOP Transition metal dichalcogenide monolayers have demonstrated a number of exquisite optical and electrical properties. Here, the authors report the optical modification of topographical and optical properties of monolayer MoS2 with femtosecond pulses under an inert atmosphere. A formation of three-dimensional structures on monolayer MoS2 with tunable height up to ≈20 nm is demonstrated. In contrast to unmodified monolayer MoS2, these optically modified structures show significantly different optical properties, such as lower photoluminescence intensity and longer fluorescence lifetime. The results suggest a novel way…

kemiallinen kaasufaasipinnoitusMaterials sciencePhotoluminescencegenetic structuresoptical modification02 engineering and technologyoptiset ominaisuudet010402 general chemistry01 natural scienceschemistry.chemical_compoundtopographyrikkiyhdisteetMonolayermolybdenum disulfidefotoluminesenssiMolybdenum disulfideMechanical Engineering021001 nanoscience & nanotechnology2D materialseye diseases0104 chemical sciencesChemical engineeringchemistryMechanics of Materialsphotoluminescencesense organsohutkalvotmolybdeeni0210 nano-technology
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Unconventional synthesis and properties of zeolitic imidazolate frameworks and 2D magnetic MOFs

2021

Esta tesis fue planteada para el desarrollo de nuevos polímeros de coordinación y materiales híbridos metalorgánicos (MOFs) basados en rutas sintéticas novedosas en ausencia de disolvente. Esta novedosa metodología de síntesis permite acceder a nuevos materiales inalcanzables por rutas más clásicas como las solvotermales. La tesis se centra en la obtención de materiales basados en Fe(II), el cual es sensible a ser oxidado durante las reacciones de formación de MOFs a Fe(III). Por ello se utilizó una síntesis en ausencia de disolvente en atmosfera inerte compatible con Fe(II). Para ello se utiliza una familia de ligandos sublimables tipo imidazol y metalocenos, como el ferroceno como fuente …

magneticUNESCO::QUÍMICA2d materialssolvent-free:QUÍMICA [UNESCO]mofzifs
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Optical and electronic properties of the two-dimensional materials InSe, WSe2 and MoS2

2017

El camp dels materials bidimensionals ha atret recentment l’atenció de la comunitat científica. Les propietats particulars que aquests materials presenten quan el seu espessor és reduït fins l’escala nanomètrica permeten preveure el seu potencial per a aplicacions de recerca, tant fonamental com tecnològica, en una varietat de camps que inclou la catàlisi, l’emmagatzematge d’energia, la detecció, els dispositius optoelectrònics i la informació quàntica. Aquesta tesi presenta l’estudi de les propietats òptiques i electròniques de diferents materials van der Waals bidimensionals: les àmpliament estudiades formes bidimensionals dels dicalcogenurs de metals de transició MoS2 i WSe2, i les menys…

nanotechnology:FÍSICA [UNESCO]InSephotonicsUNESCO::FÍSICAWSe22D materialsMoS2single-layer materials
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Time-resolved core-level photoemission data of tungsten diselenide

2020

Pump-probe core-level photoemission spectroscopy data of tungsten diselenide (WSe2) measured using an electron momentum microscope at the FLASH Free-electron laser.

photoemission spectroscopyXPSPhysics::Optics2D materialpump-probe spectroscopyfree electron laser
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Ultrafast Coherent THz Lattice Dynamics Coupled to Spins in the van der Waals Antiferromagnet FePS3

2022

Coherent THz optical lattice and hybridized phonon–magnon modes are triggered by femtosecond laser pulses in the antiferromagnetic van der Waals semiconductor FePS3. The laser-driven lattice and spin dynamics are investigated in a bulk crystal as well as in a 380 nm-thick exfoliated flake as a function of the excitation photon energy, sample temperature and applied magnetic field. The pump-probe magneto-optical measurements reveal that the amplitude of a coherent phonon mode oscillating at 3.2 THz decreases as the sample is heated up to the Néel temperature. This signal eventually vanishes as the phase transition to the paramagnetic phase occurs, thus revealing its connection to the long-ra…

spintronicsSemiconductorsMechanics of MaterialsMechanical EngineeringGeneral Materials Scienceddc:530antiferromagnets2D materialsphononMaterialsmagnonultrafast pump-probe spectroscopyvan der Waals semiconductors
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