Electrical and thermal properties of fluorine-intercalated graphite fibers

1990 ◽  
Vol 41 (8) ◽  
pp. 4961-4969 ◽  
Author(s):  
L. Piraux ◽  
V. Bayot ◽  
J. P. Issi ◽  
M. S. Dresselhaus ◽  
M. Endo ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Intercalated Graphite ◽  
Graphite Fibers

Raman spectra and staging of intercalated graphite fibers

Carbon ◽  
1983 ◽  
Vol 21 (2) ◽  
pp. 121-129 ◽  
Author(s):  
P. Kwizera ◽  
M.S. Dresselhaus ◽  
G. Dresselhaus
Keyword(s):  
Raman Spectra ◽  
Intercalated Graphite ◽  
Graphite Fibers

107. Anisotropy effects in the linearly polarized X-ray absorption spectrum of Br2 intercalated graphite fibers and HOPG

Carbon ◽  
1984 ◽  
Vol 22 (2) ◽  
pp. 216
Author(s):  
J.L Feldman ◽  
E.F Skelton ◽  
A.C Ehrlich ◽  
D.D Dominguez ◽  
W.T Elam ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
X Ray ◽  
Intercalated Graphite ◽  
Linearly Polarized ◽  
Graphite Fibers ◽  
X Ray Absorption

Magnetotransport at the metal-insulator transition in fluorine-intercalated graphite fibers

1991 ◽  
Vol 43 (15) ◽  
pp. 12304-12315 ◽  
Author(s):  
S. L. di Vittorio ◽  
M. S. Dresselhaus ◽  
M. Endo ◽  
T. Nakajima
Keyword(s):  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Intercalated Graphite ◽  
Graphite Fibers

scholarly journals Image analysis of TEM pictures of fluorine-intercalated graphite fibers

1993 ◽  
Vol 8 (3) ◽  
pp. 512-522 ◽  
Author(s):  
K. Oshida ◽  
M. Endo ◽  
T. Nakajima ◽  
S.L. di Vittorio ◽  
M.S. Dresselhaus ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Fast Fourier Transform ◽  
Intercalation Compound ◽  
Small Range ◽  
Fluorine Concentration ◽  
Repeat Distance ◽  
Intercalated Graphite ◽  
Analysis Technique ◽  
Out Of Plane ◽  
Graphite Fibers

A digitization of the TEM pictures of fluorine-intercalated graphite fibers has been used to carry out quantitative measurements of the defect structure of this material. Emphasis is given to both the computer analysis technique and to the characterization of the defects. The amount of intercalation-induced disorder increases with increasing fluorine concentration. The fast Fourier transform of the digitized TEM image exhibits two diffuse spots, corresponding to the c-axis repeat distance of the intercalation compound. The length and width of the spots are a measure of the out-of-plane and in-plane disorder present in the fibers. From the fast Fourier transform, the distribution of interlayer repeat distances and the fraction of unintercalated graphite regions throughout the material is obtained. By selecting a small range of repeat distances and carrying out an inverse fast Fourier transform, the spatial distribution of material with a given repeat distance is determined. Regions with the same repeat distance are found to form islands. This particular feature of fluorine graphite intercalation compounds, as well as the nature of the microscopic defects and the staging behavior of fluorine-intercalated graphite fibers, are discussed in connection with the dual covalent and ionic nature of the carbon-fluorine bond in fluorine-intercalated graphite.

Raman Studies of Fluorine-Intercalated Carbon Fibers

1990 ◽  
Vol 209 ◽  
Author(s):  
A. M. Rao ◽  
A. W. P. Fung ◽  
M. S. Dresselhaus ◽  
G. Dresselhaus ◽  
M. Endo ◽  
...  
Keyword(s):  
Carbon Fibers ◽  
Intensity Ratio ◽  
Domain Size ◽  
Broad Line ◽  
Raman Intensity ◽  
Inverse Relation ◽  
Intercalated Graphite ◽  
Scattering Measurements ◽  
Integrated Intensity ◽  
Graphite Fibers

ABSTRACTWe report Raman scattering measurements on fluorine-intercalated graphite fibers (CxF) for stoichiometries x =7.8, 4.5 and 2.9. Lorentzian fits to our Raman lineshapes indicate the presence of two lines around 1600 cm−1 and a broad line around 1355 cm−1 . The 1355 cm−1 line is the disorder-induced graphite line and the ratio of the integrated intensity of this line to that of the 1600 cm−1 doublet (R) provides a measure of the intercalationinduced disorder in the CjF fibers. Both TEM and Raman studies indicate the presence of unintercalated graphitic regions in the CxF fiber. The inverse relation between the average crystal planar domain size La, and the Raman intensity ratio R yields La. ,˜52Å for C7.8F fibers and La. , ˜40Å for C4.5,F and C2.9F fibers.

Electrical properties of room temperature fluorine-intercalated graphite fibers

1991 ◽  
Vol 40 (2) ◽  
pp. 179-185 ◽  
Author(s):  
A. Tressaud ◽  
P. Dordor ◽  
E. Marquestaut ◽  
P. Hagenmuller ◽  
H. Fujimoto ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Room Temperature ◽  
Intercalated Graphite ◽  
Graphite Fibers
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