Stepwise Quenching of Exciton Fluorescence in Carbon Nanotubes by Single Molecule Reactions - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Science Année : 2007

Stepwise Quenching of Exciton Fluorescence in Carbon Nanotubes by Single Molecule Reactions

Résumé

Single-molecule chemical reactions with individual single-walled carbon nanotubes were observed through near-infrared photoluminescence microscopy. The emission intensity within distinct submicrometer segments of single nanotubes changes in discrete steps after exposure to acid, base, or diazonium reactants. The steps are uncorrelated in space and time, and reflect the quenching of mobile excitons at localized sites of reversible or irreversible chemical attack. Analysis of step amplitudes reveals an exciton diffusional range of about 90 nanometers, independent of nanotube structure. Each exciton visits approximately 104 atomic sites during its lifetime, providing highly efficient sensing of local chemical and physical perturbations.
Fichier principal
Vignette du fichier
2007_HAL_Science.pdf (293.07 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00164617 , version 1 (21-07-2007)

Identifiants

Citer

Laurent Cognet, Dmitri A. Tsyboulski, John-David R. Rocha, Condell D. Doyle, James M. Tour, et al.. Stepwise Quenching of Exciton Fluorescence in Carbon Nanotubes by Single Molecule Reactions. Science, 2007, 316 (5830), pp.1465-1468. ⟨10.1126/science.1141316⟩. ⟨hal-00164617⟩

Collections

CNRS LOMA
68 Consultations
145 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More