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Author Patterson, Jeremy R. ♦ Catledge, Shane A. ♦ Vohra, Yogesh K. ♦ Akella, Jagannadham ♦ Weir, Samuel T.
Sponsorship (US)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher The American Physical Society
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ CARBON ♦ DIAMONDS ♦ ELECTRIC CONDUCTIVITY ♦ FULLERENES ♦ GRAPHITE ♦ HARDNESS ♦ MECHANICAL PROPERTIES ♦ TRANSFORMATIONS
Abstract 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.
ISSN 00319007
Educational Use Research
Learning Resource Type Article
Publisher Date 2000-12-18
Publisher Place United States
Journal Physical Review Letters
Volume Number 85
Issue Number 25


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