Open AccessPoly(3-hexyl-thiophene) coil-wrapped single wall carbon nanotube investigated by scanning tunneling spectroscopy
Author(s) -
Michele Giulianini,
Eric R. Waclawik,
John Bell,
Manuela Scarselli,
P. Castrucci,
M. De Crescenzi,
Nunzio Motta
Publication year - 2009
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.3241998
Subject(s) - thiophene , carbon nanotube , nanotube , materials science , quantum tunnelling , scanning tunneling spectroscopy , polymer , carbon nanotube quantum dot , scanning tunneling microscope , schottky barrier , density functional theory , nanotechnology , local density of states , spectroscopy , chemical physics , condensed matter physics , optoelectronics , chemistry , computational chemistry , composite material , organic chemistry , diode , quantum mechanics , physics
Scanning Tunneling Spectroscopy was performed on a (15,0) single wall carbon nanotube partially wrapped by Poly(3-hexyl-thiophene). On the bare nanotube section, the local density of states is in good agreement with the theoretical model based on local density approximation and remarkably is not perturbed by the polymer wrapping. On the coiled section, a rectifying current-voltage characteristic has been observed along with the charge transfer from the polymer to the nanotube. The electron transfer from Poly(3-hexyl-thiophene) to metallic nanotube was previously theoretically proposed and contributes to the presence of the Schottky barrier at the interface responsible for the rectifying behavior
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