title: White-light-emitting self-assembled nanofibers and their evidence by microspectroscopy of individual objects.
abstract: The self-assembly of a blue-emitting light-harvesting organogelator and specifically designed highly fluorescent tetracenes yields nanofibers with tunable emissive properties. In particular, under near-UV excitation, white light emission is achieved in organogels and dry films of nanofibers. Confocal fluorescence microspectroscopy demonstrates that each individual nanofiber emits white light. A kinetic study shows that an energy transfer (ET) occurs between the blue-emitting anthracene derivative and the green- and red-emitting tetracenes, while inter-tetracene ETs also take place. Moreover, microscopy unravels that the nanofibers emit polarized emission in the blue spectral region, while at wavelengths higher than 500 nm the emission is not significantly polarized.
authors.affiliation: Université Bordeaux 1, CNRS, Institut des Sciences Moléculaires, NEO Nanostructures Organiques, 351 crs de la Liberation, 33405 Talence cédex, France.
authors.forename: Carlo
authors.initials: C
authors.lastname: Giansante
authors.forename: Guillaume
authors.initials: G
authors.lastname: Raffy
authors.forename: Christian
authors.initials: C
authors.lastname: Schäfer
authors.forename: Hakim
authors.initials: H
authors.lastname: Rahma
authors.forename: Min-Tzu
authors.initials: MT
authors.lastname: Kao
authors.forename: Alexandre G L
authors.initials: AG
authors.lastname: Olive
authors.forename: André
authors.initials: A
authors.lastname: Del Guerzo
mesh_terms: D004735:Energy Transfer; D007700:Kinetics; D008027:Light; D018613:Microscopy, Confocal; D015394:Molecular Structure; D057139:Nanofibers / Q000737:chemistry*; D009279:Naphthacenes / Q000138:chemical synthesis* / Q000737:chemistry; D012996:Solutions
chemical_list: D009279:Naphthacenes; D012996:Solutions