Polarized raman study of single-wall semiconducting carbon nanotubes
Polarized Raman spectra were obtained from a rope of aligned semiconducting single-wall nanotubes (SWNTs) in the vicinity of the D band and the G band. Based on group theory analysis and related theoretical predictions, the G-band profile was deconvolved into four intrinsic SWNT components with the following symmetry assignments: 1549 cm(-1) [E2(E(2g))], 1567 cm(-1) [A(A(1g))+E1(E(1g))], 1590 cm(-1) [A(A(1g))+E1(E(1g))] and 1607 cm(-1) [E2(E(2g))]. The frequency shifts of the tangential G modes from the 2D graphitelike E(2g(2)) frequency are discussed in terms of the nanotube geometry.
Jorio
A
Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA.
Dresselhaus
G
Dresselhaus
MS
Souza
M
Dantas
MS
Pimenta
MA
Rao
AM
Saito
R
Liu
C
Cheng
HM