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Systematic studies of structural changes in stacked cup carbon nanofibers by heat treatment from 1800 to 3000 o C are carried out. The most prominent feature upon heat treatment of these nanofibers is the formation of energetically stable loops between adjacent active end planes both on the inner and outer surfaces. The appearance of the jagged outer and inner surfaces at 3000 o C...
Carbon nanofibers with diameters of 80-100 nm were obtained by the pyrolytic method when a benzene solution containing ferrocene was used as a feedstock. A higher flow rate of carrier gas induced variations in the macro-morphology and also in the microstructure. The characteristics of these fibers were bundle formation, such as a macro-fibril, with a different tip morphology as compared with that...
The topological change of the surface of vapor-grown carbon fibers (VGCFs) as a function of heat treatment temperature was observed using FE-SEM, STM and AFM. The morphological change at the micrometre scale from a smooth surface, to a rope-like structure, and to a grain-like structure was closely related with the volume change, especially due to the annular fiber form. The extent to which the micro-domain...
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