Controllable synthesis of carbon coils and growth mechanism for twinning double-helix catalyzed by Ni nanoparticle

    Authors

    X. Jian; D. C. Wang; H. Y. Liu; M. Jiang; Z. W. Zhou; J. Lu; X. L. Xu; Y. Wang; L. Wang; Z. Z. Gong; M. L. Yang; J. H. Gou;D. Hui

    Comments

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    Abbreviated Journal Title

    Compos. Pt. B-Eng.

    Keywords

    Carbon fibre; Nano-structures; Chemical vapour deposition (CVD); Heat; treatment; CHEMICAL-VAPOR-DEPOSITION; EPOXY-BASED COMPOSITES; MICRO-COILS; FIBER; SYNTHESIS; ACETYLENE; PYROLYSIS; NANOTUBES; NANOCOILS; MORPHOLOGY; NANOFIBERS; Engineering, Multidisciplinary; Materials Science, Composites

    Abstract

    A simple approach using 90 nm Ni nanoparticles to tune the growth of carbon fibers is developed basing on the bottom-up regulation in this study. By adjusting the preparing temperature and atmospheric composition, the nickel-containing catalysts with specific sizes and shapes are alternately prepared from 90 nm to 500 nm. The straight carbon nanofibers and three kinds of carbon coils (single-helix carbon nanocoils, single-helix carbon microcoils and twinning double-helix carbon microcoils) with the coil diameter ranging from 150 nm to 3 mu m are achieved by using the as-prepared catalyst. The relationship between the carbon coil and catalyst particle, and the growth mechanism for different kinds of helices are discussed in details. The results suggest that catalytic anisotropy come from growing tendency and rate of carbon deposition on the facets, edges and vertices of catalyst grain. The twinning structure exists in each fiber of the double-helix carbon microcoils regardless of circular or flat fiber, which is separated by the tip of the catalyst particle due to the different rate of carbon deposition at edge and vertex. (C) 2013 Elsevier Ltd. All rights reserved.

    Journal Title

    Composites Part B-Engineering

    Volume

    61

    Publication Date

    1-1-2014

    Document Type

    Article

    Language

    English

    First Page

    350

    Last Page

    357

    WOS Identifier

    WOS:000334133900039

    ISSN

    1359-8368

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