Raman scattering inC60and alkali-metal-dopedC60films

High pressure and high temperature induced polymerization of C60 nanotubes

“…3a shows the Raman spectrum of the pristine C 60 nanotubes, in which the A g (2) mode is observed at 1468 cm -1 , the same as position as for pristine C 60 bulk crystals. [23] This peak position shows that the pristine C 60 nanotubes are based on monomeric C 60 molecules, which agrees well with the fcc structure observed in our XRD measurements. To study the polymeric phases of the C 60 nanotubes after different HPHT treatments, Raman spectra of the relevant samples were again examined.…”

“…For pristine C 60 , the spectrum contains ten peaks, including eight H g modes and two A g modes. [23] Among these peaks, the pentagonal pinch mode A g (2) is very sensitive to the bonding configuration and its frequency depends on the number of intermolecular bonds to the molecule. Fig.…”

Fullerenes

“…15) are again quite similar to that of C 6 o, except for the apparent absence in the M 3 C 6 o spectra of several of the Raman lines derived from the H g modes in C6o-This is particularly true in the spectrum of Rb 3 C 6 o for which the same sample was shown resistively to exhibit a T c ~ 28 K. 138 For the case of K 3 C 60 (see Fig. 18) 116 and Rb 3 C 6 o, 141 the coupling between the phonons and a low energy continuum strongly broadens the H g -derived modes 116 ' 120 and gives rise to modifications in the Raman lineshape. For example, in both K 3 C 6 o and Rb 3 C 6 o, the 270 cm" 1 line shows a distinct Breit-Wigner-Fano lineshape.…”

“…15 where the Raman spectra for solid C 6 o are presented in comparison to various M 3 C 6 o and M 6 C 6 o spectra. 116 ' 117 One can, in fact, identify each of the lines in the M 6 C 60 spectra with those of pristine C 6 o, and very little change is found from one alkali metal dopant to another. 117 The small magnitude of the perturbation of the Raman spectrum by alkali metal doping and the insensitivity of the M 6 C6o spectra to the specific alkali metal species indicate a very weak coupling between the C 6 o balls and the M + ions.…”

Synthesis of Thin, Rectangular C60 Nanorods Using m‐Xylene as a Shape Controller

“…[20][21][22][23][24] The Raman spectrum of pristine C 60 contains ten peaks, of which eight are H g modes and two A g modes. [20,21] In this study, Raman spectra were collected to characterize the nanorods shown in Figure 1. For comparison, pristine C 60 powder was also studied under the same conditions.…”