Selective Enhancement of Photoluminescence in Filled Single-Walled Carbon Nanotubes

Autor(en)

Xianjie Liu, Hans Kuzmany, Paola Ayala, Matteo Calvaresi, Francesco Zerbetto, Thomas Pichler

Abstrakt

The insertion of organometallic molecules into the hollow core of single-walled carbon nanotubes can drastically change their properties. Using biocompatible standardized suspensions of pristine, opened, and filled nanotubes, a very selective enhancement of the photoluminescence and optical absorption is observed. Via ferrocene encapsulation, the PL signal increases almost by a factor of three for tubes with chiralities such as (8,6) and (9,5). This behavior is attributed to a local electron charge transfer from the ferrocene molecules that balances out the p-type doping of the nanotubes resulting from the modified charge distribution of the surfactant molecules and the opening process. The near infrared photoluminescence of the nanotubes in solution is strongly enhanced when ferrocene is encapsulated. The diameter-dependent charge transfer is additionally confirmed by first principles calculations. These findings highlight an essential ingredient to optimize the application of solvated nanotubes, for instance, as invivo near infrared sensors in biomedical research.

Organisation(en)

Elektronische Materialeigenschaften

Externe Organisation(en)

Università di Bologna

Journal

Advanced Functional Materials

Band

22

Seiten

3202-3208

Anzahl der Seiten

7

ISSN

1616-301X

DOI

https://doi.org/10.1002/adfm.201200224

Publikationsdatum

2012

Peer-reviewed

Ja

ÖFOS 2012

103015 Kondensierte Materie, 103018 Materialphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/8b06316e-03bc-427f-9896-b44a47fda1ea