Electrical and Mechanical Properties of C{sub 70} Fullerene and Graphite under High Pressures Studied Using Designer Diamond Anvils
Journal Article
·
· Physical Review Letters
We compare electrical and mechanical properties of C{sub 70} fullerene with high purity graphite to 48 GPa at room temperature using designer diamond anvils with embedded electrical microprobes. The electrical resistance of C{sub 70} shows a minimum at 20 GPa with transformation to an amorphous insulating phase complete above 35 GPa , while graphite remains conducting. Nanoindentation shows hardness values 220times larger for the pressure quenched amorphous phase than for similarly treated graphite. Our studies establish that the amorphous carbon phase produced from C{sub 70} has unique properties not attainable from graphite.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40205897
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 85; ISSN 0031-9007
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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