Environmental and synthesis-dependent luminescence properties of individual single-walled carbon nanotubes.
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.
Duque
Juan G
JG
Centre de Physique Moléculaire Optique et Hertzienne, Université de Bordeaux and CNRS, 351 cours de la libération, Talence F-33405, France.
Pasquali
Matteo
M
Cognet
Laurent
L
Lounis
Brahim
B
D015374:Biosensing Techniques; D049449:Luminescence; D037742:Nanotubes, Carbon / Q000737:chemistry*
D037742:Nanotubes, Carbon