The lattice images of the new type (cup-stacked type) carbon nanofibers were observed by high resolution transmission electron microscopy (HRTEM) and the detailed structure was analyzed by image processing.The angle of opposed graphitic basal planes was measured from power spectrum obtained by 2 dimensional first Fourier transform.The structures of the slanted (00·1) lattice planes,which appear at the cross section of the fiber wall,were shown by means of this image analysis technique.Defects were observed in the ordered structure of this material.The (00·1) lattice planes show large fluctuation in alignment of them and the (10·00 lattice planes make several angle with the (00·1) lattice planes.The average repeat distance d_002 was estimated on the basis of d_100 by HRTEM image and image analysis.
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