Growth of regularly coiled carbon filaments by Ni catalyzed pyrolysis of acetylene, and their morphology and extension characteristics
作者:
Seiji Motojima,
Masayuki Kawaguchi,
Koji Nozaki,
Hiroshi Iwanaga,
期刊:
Applied Physics Letters
(AIP Available online 1990)
卷期:
Volume 56,
issue 4
页码: 321-323
ISSN:0003-6951
年代: 1990
DOI:10.1063/1.102816
出版商: AIP
数据来源: AIP
摘要:
Regularly coiled carbon filaments have been obtained by the catalytic pyrolysis of acetylene at 350–750 °C using Ni plate and powder as a catalyst. Morphology and extension characteristics of the obtained coiled filaments were examined in some detail. The regularly coiled filaments have generally a 0.1–0.3 &mgr;m thickness, a 2–8 &mgr;m coil diameter, and a 0.1–5 mm coil length. The coiled filaments were always formed by the entwistness of two pair coils which grew in the same direction simultaneously from a diamond‐shaped Ni seed. We have found that the coiled filaments could be elastically extended up to about three times versus the original coil length.
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