Morphology of Carbon Micro-Coils
The double helical carbon micro-coils were obtained by chemical vapor deposition. As-grown carbon micro-coils with amorphous structure were heat-treated at various temperatures up to 3000°C . By heat treatment, the shape of the coils was not changed. The morphology of these coils was observed in detail using electron microscope. The lattice structure was analyzed by X-ray diffraction method. Heat treatment temperature dependence of the magnetoresistance and the measurement of Raman spectra suggest that the coils heattreated at higher temperature are more highly graphitized.
S.-G. Kang and T. Kobayashi
M. Fujii and S. Motojima, "Morphology of Carbon Micro-Coils", Materials Science Forum, Vols. 449-452, pp. 205-208, 2004