title: Organic functionalization and optical properties of carbon onions.
abstract: We report, for the first time, the organic functionalization of carbon onions. The functionalization was achieved via 1,3-dipolar cycloaddition of azomethine ylides to a mixture of amorphous carbon and concentric fullerenes. Once functionalized, the onions become soluble in organic solvents and it is possible to purify them from the rest of carbon. Their nonlinear optical properties have been studied in solution for application as broadband optical limiters. It was found that the functionalized onions are an example of soluble material that functions equally well in both the visible and the NIR regions.
authors: Dipartimento di Scienze Farmaceutiche, Università di Trieste, Piazzale Europa 1, 34127 Trieste, Italy.
authors: Vasilios
authors: V
authors: Georgakilas
authors: Dirk M
authors: DM
authors: Guldi
authors: Raffaella
authors: R
authors: Signorini
authors: Renato
authors: R
authors: Bozio
authors: Maurizio
authors: M
authors: Prato