Structural ( n, m) determination of isolated single-wall carbon nanotubes by resonant Raman scattering.
We show that the Raman scattering technique can give complete structural information for one-dimensional systems, such as carbon nanotubes. Resonant confocal micro-Raman spectroscopy of an (n,m) individual single-wall nanotube makes it possible to assign its chirality uniquely by measuring one radial breathing mode frequency omega(RBM) and using the theory of resonant transitions. A unique chirality assignment can be made for both metallic and semiconducting nanotubes of diameter d(t), using the parameters gamma(0) = 2.9 eV and omega(RBM) = 248/d(t). For example, the strong RBM intensity observed at 156 cm(-1) for 785 nm laser excitation is assigned to the (13,10) metallic chiral nanotube on a Si/SiO2 surface.
Jorio
A
A
Department de Physics, Massachusetts Institutr of Technology, Cambridge 02139, USA.
Saito
R
R
Hafner
J H
JH
Lieber
C M
CM
Hunter
M
M
McClure
T
T
Dresselhaus
G
G
Dresselhaus
M S
MS