Phonon-assisted excitonic recombination channels observed in DNA-wrapped carbon nanotubes using photoluminescence spectroscopy.
By using a sample of DNA-wrapped single-wall carbon nanotubes strongly enriched in the (6,5) nanotube, photoluminescence emissions observed at special excitation energy values were identified with specific mechanisms of phonon-assisted excitonic absorption and recombination processes associated with (6,5) nanotubes, including one-phonon, two-phonon, and some continuous-luminescence processes. Such detailed processes are not separately identified in three-dimensional semiconducting materials. A general theoretical framework is presented to interpret the experimentally observed phonon-assisted processes in terms of excitonic states.
Chou
S G
SG
Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA.
Plentz
F
F
Jiang
J
J
Saito
R
R
Nezich
D
D
Ribeiro
H B
HB
Jorio
A
A
Pimenta
M A
MA
Samsonidze
Ge G
GG
Santos
A P
AP
Zheng
M
M
Onoa
G B
GB
Semke
E D
ED
Dresselhaus
G
G
Dresselhaus
M S
MS
D004247:DNA / Q000737:chemistry*; D008163:Luminescent Measurements / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry*
D037742:Nanotubes, Carbon; D004247:DNA