Journal of Biomimetics, Biomaterials and Biomedical Engineering Vol. 72

Abstract: The structural changes of a type of polydiacetylene single crystal obtained via the physical vapor transport technique induced by the formation of polymeric backbone chains upon ultraviolet irradiation are discussed in this paper. On the basis of the results of X-ray diffractometry, X-ray topography, and atomic force microscopy, the structural changes were confirmed to be due to the formation of backbone chains along the basal (010) plane. The high periodicity between equivalent (010) planes is maintained regardless of the formation of backbone chains. The observation of the surface morphology on the basal (010) plane revealed that many polymeric bundles were formed in both the [001] and [101] directions.