Raman scattering from alkali graphite intercalation compounds

1981 ◽  
Vol 10 (1) ◽  
pp. 129-135 ◽  
Author(s):  
S. A. Solin ◽  
N. Caswell
Keyword(s):  
Raman Scattering ◽  
Intercalation Compounds ◽  
Graphite Intercalation Compounds ◽  
Graphite Intercalation

Raman scattering in graphite intercalation compounds

1976 ◽  
Vol 20 (12) ◽  
pp. 1111-1115 ◽  
Author(s):  
J.J. Song ◽  
D.D.L. Chung ◽  
P.C. Eklund ◽  
M.S. Dresselhaus
Keyword(s):  
Raman Scattering ◽  
Intercalation Compounds ◽  
Graphite Intercalation Compounds ◽  
Graphite Intercalation

Raman Scattering in MxC60 Films (M=K. Rb, Cs; ×=0, 3.6)

1992 ◽  
Vol 247 ◽  
Author(s):  
Kai-An Wang ◽  
Ping Zhou ◽  
Ying Wang ◽  
J. M. Holden ◽  
Song-Mn Ren ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Alkali Metal ◽  
Raman Scattering ◽  
Intercalation Compounds ◽  
Frequency Mode ◽  
Graphite Intercalation Compounds ◽  
Bond Lengths ◽  
Solid Films ◽  
Graphite Intercalation ◽  
A Charge

ABSTRACTThe Raman-active modes of solid films of MxC60 (x-0, 6; M=K, Rb, Cs) and K3C60 have been studied experimentally. The mode-activity is dominated by intraball interactions, and the effect of the M + ions on the C60 spectrum is observed to be almost insensitive to the radius or mass of the alkali metal. Tangential modes of solid C60 are observed to soften in M660 by -60 cm−1, which can be attributed to a charge-transfer-induced elongation of the intraball bond lengths, similar to that observed in graphite intercalation compounds. Conversely, the radial modes are found to upshift slightly, indicating that a competing mechanism counteracts the effect of the bond elongation. For K3C60, six Raman lines have been observed in which the lowest frequency mode exhibits a Breit-Wigner-Fano lineshape, indicating a coupling between the lowest frequency Hq-derived intramolecular modes of C60 and a broad Raman-active continuum with the same symmetry lying lower in frequency.

Second-Order Raman Scattering in Graphite Intercalation Compounds

1982 ◽  
Vol 20 ◽  
Author(s):  
J. Giergiel ◽  
P. C. Eklund
Keyword(s):  
Raman Scattering ◽  
Lattice Dynamics ◽  
Second Order ◽  
Intercalation Compounds ◽  
Graphite Intercalation Compounds ◽  
Von Karman ◽  
Graphite Intercalation ◽  
Von Kármán

ABSTRACTThe stage dependence of various second-order Raman features observed for acceptor (FeCl3, SbCl5) and donor (Rb) Graphite Intercalation Compounds is reported and discussed in terms of recent Born-von Kármán lattice dynamics calculations of Al-Jishi and Dresselhaus.

Electron Microscopy of Graphite Intercalation Compounds

1982 ◽  
Vol 40 ◽  
pp. 544-545
Author(s):  
G. Timp ◽  
L. Salamanca-Riba ◽  
L.W. Hobbs ◽  
G. Dresselhaus ◽  
M.S. Dresselhaus
Keyword(s):  
Electron Microscopy ◽  
Phase Transitions ◽  
Domain Wall ◽  
Intercalation Compounds ◽  
Lattice Plane ◽  
Wall Model ◽  
Graphite Intercalation Compounds ◽  
Fundamental Symmetry ◽  
Graphite Intercalation

Electron microscopy can be used to study structures and phase transitions occurring in graphite intercalations compounds. The fundamental symmetry in graphite intercalation compounds is the staging periodicity whereby each intercalate layer is separated by n graphite layers, n denoting the stage index. The currently accepted model for intercalation proposed by Herold and Daumas assumes that the sample contains equal amounts of intercalant between any two graphite layers and staged regions are confined to domains. Specifically, in a stage 2 compound, the Herold-Daumas domain wall model predicts a pleated lattice plane structure.

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