Axial nano-scale microstructures in graphitized fibers inherited from liquid crystal mesophase pitch

Seong-Ho Yoon, Yozo Korai, Isao Mochida, Kiyoshi Yokogawa, Seiji Fukuyama, Masamitsu Yoshimura

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Nano-scale structures of a mesophase puch based carbon fiber were characterized using a high-resolution scanning electron microscope (HR-SEM) and a scanning tunneling microscope (STM). Fibril was found to be sectioned by a number of pleat units, being aligned parallel along the fiber axis. The periodical size. thickness and height of pleat unit was estimated as 30-60 nm, 20-30 nm and around 7 nm, respectively. In a pleat, graphitic units of 30 60 nm long and 2-4 nm wide run principally perpendicular to the axis. The basal plane of graphite was observed at the largest magnification. Such a series of nano-structures should be related intimately to the performance of the fibers. The formation mechanism of such series of nano-structural units is discussed in relation to the nano-structure of the liquid crystal mesophase pitch and ils deformation during the spinning.

Original languageEnglish
Pages (from-to)83-88
Number of pages6
JournalCarbon
Volume34
Issue number1
DOIs
Publication statusPublished - 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Materials Chemistry

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