Thermal decomposition of C60

The influence of heat-treatment of C60 pellets in vacuum at temperatures between 500°C and 900°C has been investigated by a variety of experimental techniques. X-ray measurements show that the diffraction peaks become diffuse at temperatures beyond 700°C. Uv-visible absorption measurements show a sh...

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Bibliographic Details
Published in:Solid state communications 1992-11, Vol.84 (8), p.823-826
Main Authors: Sundar, C.S., Bharathi, A., Hariharan, Y., Janaki, J., Sankara Sastry, V., Radhakrishnan, T.S.
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
Other topics in equations of state, phase equilibria, and phase transitions
Physics
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Summary:The influence of heat-treatment of C60 pellets in vacuum at temperatures between 500°C and 900°C has been investigated by a variety of experimental techniques. X-ray measurements show that the diffraction peaks become diffuse at temperatures beyond 700°C. Uv-visible absorption measurements show a sharp diminution in the C60 content of the pellets heat-treated at temperatures beyond 700°C. Resistivity measurements show that the pellets heat-treated at 700 to 900°C are conducting with a negative temperature coefficient of resistivity. From these studies it is inferred that C60 decomposes into amorphous carbon on heat-treatment at temperatures beyond 700°C. Plausible mechanisms for the thermal decomposition of C60 are discussed.
ISSN:0038-1098
1879-2766
DOI:10.1016/0038-1098(92)90098-T