Phase transition and thermal stability of epitaxial PtSe<sub>2</sub> nanolayer on Pt(111)
Yongfeng Tong, Meryem Bouaziz, Hamid Oughaddou, Hanna Enriquez, Karine Chaouchi, François Nicolas, S. Kubsky, V.A. Esaulov, Azzedine Bendounan
Abstract
Se alloy monolayer structure is observed, in agreement with the LEED patterns showing a transition from (4 × 4) to (√3 × √3)R30° and then to a (2 × 2) superstructure. This progressive evolution of the surface reconstruction has been monitored by XPS through systematic de-convolution of the Pt4f and Se3d core level peaks at different temperatures. The present work provides an alternative method for the large scale fabrication of 2D transition metal dichalchogenide films.
Topics & Concepts
X-ray photoelectron spectroscopyLow-energy electron diffractionMonolayerScanning tunneling microscopeMaterials scienceSuperstructureTransition metalEpitaxyAnnealing (glass)Phase transitionSurface reconstructionSynchrotronThermal stabilityElectron diffractionCrystallographyAnalytical Chemistry (journal)DiffractionChemical physicsChemistryNanotechnologyCondensed matter physicsNuclear magnetic resonanceOpticsSurface (topology)Layer (electronics)ThermodynamicsMetallurgyGeometryCatalysisOrganic chemistryChromatographyMathematicsBiochemistryPhysics2D Materials and ApplicationsGraphene research and applicationsQuantum Dots Synthesis And Properties