Abstract
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 language | English |
|---|---|
| Pages (from-to) | 2735-2741 |
| Number of pages | 7 |
| Journal | Carbon |
| Volume | 49 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Jul 2011 |
| Externally published | Yes |
Cite this
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The growth and morphology of core/shell heterostructured conical carbon fibers. / Lee, Woo Jin; Li, Chao'En; Burke, Nick; Trimm, David; Patel, Jim.
In: Carbon, Vol. 49, No. 8, 07.2011, p. 2735-2741.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - The growth and morphology of core/shell heterostructured conical carbon fibers
AU - Lee, Woo Jin
AU - Li, Chao'En
AU - Burke, Nick
AU - Trimm, David
AU - Patel, Jim
PY - 2011/7
Y1 - 2011/7
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=79953771878&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2011.02.066
DO - 10.1016/j.carbon.2011.02.066
M3 - Article
VL - 49
SP - 2735
EP - 2741
JO - Carbon
JF - Carbon
SN - 0008-6223
IS - 8
ER -