6533b823fe1ef96bd127ed2d
RESEARCH PRODUCT
Harnessing Molecular Fluorophores in the Carbon Dots Matrix: The Case of Safranin O
Manuela MeloniLuigi StagiDavide SannaSebastiano GarroniLaura CalvilloAngela TerracinaMarco CannasFabrizio MessinaCarlo Maria CarbonaroPlinio InnocenziLuca Malfattisubject
safranincarbon dots; safranin; phosphors; nanoparticlesGeneral Chemical Engineeringcarbon dotsSettore FIS/01 - Fisica Sperimentalecarbon dots; nanoparticles; phosphors; safraninGeneral Materials Sciencenanoparticlesphosphorsdescription
The origin of fluorescence in carbon dots (C-dots) is still a puzzling phenomenon. The emission is, in most of the cases, due to molecular fluorophores formed in situ during the synthesis. The carbonization during C-dots processing does not allow, however, a fine control of the properties and makes finding the source of the fluorescence a challenging task. In this work, we present a strategy to embed a pre-formed fluorescent molecule, safranin O dye, into an amorphous carbonaceous dot obtained by citric acid carbonization. The dye is introduced in the melted solution of citric acid and after pyrolysis remains incorporated in a carbonaceous matrix to form red-emitting C-dots that are strongly resistant to photobleaching. Embedding dyes in amorphous C-dots represents an alternative method to optimize the emission in the whole visible spectrum.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2022-07-09 |