Transient reflectivity on vertically aligned single-wall carbon nanotubes

Gabriele Ferrini, Stefania Pagliara, Stephan Hofmann, Muhammad Arshad, Cinzia Cepek

Risultato della ricerca: Contributo in rivistaArticolo in rivistapeer review

3 Citazioni (Scopus)

Abstract

One-color transient reflectivity measurements are carried out on two different samples of vertically aligned single-wall carbon nanotube bundles and compared with the response recently published on unaligned bundles. The negative sign of the optical response for both samples indicates that the free electron character revealed on unaligned bundles is only due to the intertube interactions favored by the tube bending. Neither the presence of bundles nor the existence of structural defects in aligned bundles is able to induce a free-electron like behavior of the photoexcited carriers. This result is also confirmed by the presence of non-linear excitonic effects in the transient response of the aligned bundles.
Lingua originaleEnglish
pagine (da-a)51-55
Numero di pagine5
RivistaThin Solid Films
Volume543
DOI
Stato di pubblicazionePubblicato - 2013

Keywords

  • Excitons
  • Single-wall carbon nanotubes
  • Time resolved optical spectroscopy

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