Environmental and Synthesis-Dependent Luminescence Properties of Individual Single-Walled Carbon Nanotubes

Juan G. Duque (1, 2) , Matteo Pasquali (2) , Laurent Cognet (1) , Brahim Lounis (1)

1 CPMOH - Centre de physique moléculaire optique et hertzienne
2 Department of Chemical and Biomolecular Engineering

Luminescence properties of individual (6,5) single-walled carbon nanotubes (SWNTs) were studied using continuous wave and time-resolved spectroscopy. Nanotubes synthesized by different methods (HiPco and CoMoCat) and dispersed in two different ionic surfactants were examined either in aqueous environments or deposited on surfaces. SWNT preparations leading to the highest luminescence intensities and narrowest spectral widths exhibit the longest luminescence decay times. This highlights the role of the nanotube environment and synthesis methods in the nonradiative relaxation processes of the excitonic recombination. Samples of HiPco nanotubes dispersed in sodium deoxycholate contained the brightest nanotubes in aqueous environments. Luminescence properties of individual (6,5) single-walled carbon nanotubes (SWNTs) were studied using continuous wave and time-resolved spectroscopy. Nanotubes synthesized by different methods (HiPco and CoMoCat) and dispersed in two different ionic surfactants were examined either in aqueous environments or deposited on surfaces. SWNT preparations leading to the highest luminescence intensities and narrowest spectral widths exhibit the longest luminescence decay times. This highlights the role of the nanotube environment and synthesis methods in the nonradiative relaxation processes of the excitonic recombination. Samples of HiPco nanotubes dispersed in sodium deoxycholate contained the brightest nanotubes in aqueous environments.

Mots clés: single-walled carbon nanotubes; luminescence; spectroscopy; single molecule detection; luminescence decays; defects

Juan G. Duque, Matteo Pasquali, Laurent Cognet, Brahim Lounis. Environmental and Synthesis-Dependent Luminescence Properties of Individual Single-Walled Carbon Nanotubes. ACS Nano, 2009, 3 (8), pp.2153-2156. ⟨10.1021/nn9003956⟩. ⟨hal-00669749⟩