0000000000701135

AUTHOR

Omar F. Mohammed

0000-0001-8500-1130

showing 2 related works from this author

State of the art and prospects for halide perovskite nanocrystals

2021

Financiado para publicación en acceso aberto: Universidade de Vigo/CISUG Metal-halide perovskites have rapidly emerged as one of the most promising materials of the 21st century, with many exciting properties and great potential for a broad range of applications, from photovoltaics to optoelectronics and photocatalysis. The ease with which metal-halide perovskites can be synthesized in the form of brightly luminescent colloidal nanocrystals, as well as their tunable and intriguing optical and electronic properties, has attracted researchers from different disciplines of science and technology. In the last few years, there has been a significant progress in the shape-controlled synthesis of …

light-emitting devicesGeneral Physics and AstronomyNanotechnology02 engineering and technology010402 general chemistry01 natural sciences7. Clean energyphotocatalystsmetal-halide perovskite nanocrystalslead-free perovskite nanocrystalsPhotovoltaicsGeneral Materials ScienceNanoscience & NanotechnologyPerovskite (structure)Electronic propertiesPhysicsbusiness.industryPhysicsperovskite nanoplateletsGeneral Engineering021001 nanoscience & nanotechnology0104 chemical sciencesddc:Chemistryphotovoltaicsperovskite nanocubesmetal-halide perovskite nanocrystals; perovskite nanoplatelets; perovskite nanocubes; perovskite nanowires; lead-free perovskite nanocrystals; light-emitting devices; photovoltaics; lasers; photocatalysts; photodetectorsNanocrystalperovskite nanowiresphotodetectors2307 Química Física0210 nano-technologybusinessEngineering sciences. Technologylasers
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The Role of Site-Specific Hydrogen Bonding Interactions in the Solvation Dynamics of N-Acetyltryptophanamide

2012

Measurements of the ultrafast broadband UV fluorescence of N-acetyltryptophanamide (NATA) provide detailed information on its relaxation patterns in three different solvents: methanol (MeOH), water and acetonitrile (ACN). Several processes leading to excited state solvation and cooling are found to occur on different characteristic time scales and are thoroughly analyzed. Comparison between protic MeOH and aprotic ACN allows one to single out a 12 Ps component in the former, which is attributed to the rearrangement of H-bonds existing between the protic solvent and excited NATA. This significantly stabilizes the excited state and provides the molecule with an efficient cooling mechanism. Th…

Quenching (fluorescence)ChemistryHydrogen bondFluorescence up-conversionSettore FIS/01 - Fisica SperimentaleTryptophanSolvationQuantum yieldhydrogen bondingPhotochemistrySurfaces Coatings and Filmschemistry.chemical_compoundExcited stateMaterials ChemistryMoleculesolvationPhysical and Theoretical ChemistryAcetonitrileProtic solventThe Journal of Physical Chemistry B
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