title: Photoconductivity of packed homotype bundles formed by aligned single-walled carbon nanotubes.
abstract: Photoconductivity properties of aggregated single-walled carbon nanotubes have been studied by performing measurements on macroscopic ribbons, obtained by the aggregation of a large number of SWCNT bundles. Structural analysis performed by electron diffraction revealed that the nanotubes forming each bundle have the same chirality. The experimental results, regarding the region 1.2-3.6 eV and the pressure range 10(3)-10(-3) mbar, suggest that the photoexcitation of nanotubes, packed in bundles and organized in ribbons, generates electron-hole pairs within a band structure and that bond excitons are formed by Coulomb interactions between spatially confined charge carriers.
authors.affiliation: Dipartimento di Scienza dei Materiali, Università del Salento, Lecce, Italy.
authors.forename: Antonio
authors.initials: A
authors.lastname: Serra
authors.forename: Daniela
authors.initials: D
authors.lastname: Manno
authors.forename: Emanuela
authors.initials: E
authors.lastname: Filippo
authors.forename: Antonio
authors.initials: A
authors.lastname: Tepore
authors.forename: Maria
authors.initials: M
authors.lastname: Letizia Terranova
authors.forename: Silvia
authors.initials: S
authors.lastname: Orlanducci
authors.forename: Marco
authors.initials: M
authors.lastname: Rossi