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Single domain oval carbon nanofiber prepared from a polymer blend process

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Single domain graphite fibers of 50–500nm in diameter were prepared from a mesophase pitch mixed with a matrix polymer to form a polymeralloy. The alloy wasthen spun, stabilized,carbonized,and graphitized at 2900C. The carbonized fiber had a circular or Y-shaped cross-section, but all of the graphitized carbon nanofiber (CNF) changed into an elliptical cross-section with an aspect ratio (major axis/minor axis) of 2.47. The CNF consisted of well-developed graphite layers ordered throughout the cross-section,as observed in a single crystal and the layer edges formed loops consisting of 5–10 layers.

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