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RESEARCH PRODUCT
Monolayer graphene doping and strain dynamics induced by thermal treatments in controlled atmosphere
Franco Mario GelardiMarco CannasGianpiero BuscarinoFilippo GiannazzoAngelo ArmanoAngelo ArmanoSimonpietro AgnelloEmanuela Schiliròsubject
inorganic chemicalsControlled atmosphereAnalytical chemistrychemistry.chemical_element02 engineering and technologydoping010402 general chemistry01 natural sciencesOxygenStrainAtmosphereCondensed Matter::Materials Sciencesymbols.namesakeThermalGeneral Materials ScienceRamanDopinggraphenetechnology industry and agricultureGeneral Chemistry021001 nanoscience & nanotechnologyNitrogen0104 chemical scienceschemistryChemical engineeringGraphene Thermal Doping Chemistry (all)symbolsAFM0210 nano-technologyRaman spectroscopyWater vapordescription
Time dynamics of doping and strain induced in single layer graphene by thermal treatments up to 300 degrees C in vacuum, nitrogen, carbon dioxide and oxygen controlled atmosphere are deeply studied by Raman spectroscopy and they are compared with its morphological evolution investigated by Atomic Force Microscopy. The reaction dynamics in oxygen treatments is determined down to a time scale of few minutes as well as that of dedoping process made by water vapor treatment. The interplay of strain modification and doping effects is separated. The strain is clarified to be strongly influenced by the cooling time. The doping removal is dominated by the water vapor, showing that the concentration of molecular water in gas phase governs the process rate. The opportune choice of heating/cooling and atmosphere enables to tune selectively the strain or doping. (C) 2017 Elsevier Ltd. All rights reserved.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-02-01 |