The growth and morphology of core/shell heterostructured conical carbon fibers

Woo Jin Lee, Chao'En Li, Nick Burke, David Trimm, Jim Patel

Research output: Contribution to journalArticleResearchpeer-review

6 Citations (Scopus)


Core/shell heterostructured conical carbon fibers with silicon-based cores and graphitic carbon sheaths have been grown on silicon carbide (SiC) surfaces exposed to the combustion of methane. The conical carbon fibers (CCFs), which taper from a circular base to a point, appear to form by two simultaneous growth processes, axial tip-growth and radial fiber thickening. Radial fiber thickening results from pyrolytic carbon deposition from gas-phase hydrocarbons. Oxidation of SiC surfaces is proposed to produce gas-phase silicon oxides, which feed axial tip-growth and install the silicon-based core. The unusual morphology of the CCFs, including bending, branching, curving and tapering, is proposed to result from the action and interplay of these two simultaneous processes. 

Original languageEnglish
Pages (from-to)2735-2741
Number of pages7
Issue number8
Publication statusPublished - Jul 2011
Externally publishedYes

Cite this