Infrared-active vibrational modes of single-walled carbon nanotubes.
The IR-active vibrational modes of single-walled carbon nanotubes have been observed by optical transmission through thin films of bundled nanotubes. Because IR-active chemical functional groups, e.g., -COOH, -OH, might be attached to the tube walls and contribute additional spectral features, we have also studied the effects of chemical purification and long-term high-temperature vacuum annealing on the IR spectrum. Through comparison with theory, we are able to assign much of the sharp structure observed in our IR spectra.
Kim
U J
UJ
Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
Liu
X M
XM
Furtado
C A
CA
Chen
G
G
Saito
R
R
Jiang
J
J
Dresselhaus
M S
MS
Eklund
P C
PC