Abstract

The lattice defects in polydiacetylene (PDA) single crystals prepared using physical vapor growth were investigated by white beam X-ray topography. Line patterns along the [0 0 1] and [1 0 2] directions were clearly observed. Appearance of the line patterns along the [0 0 1] direction proves the polymerization direction predicted by Hädicke et al. The topographic results are in good agreement with the surface morphologies investigated by atomic force microscopy (AFM).

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