Abstract
Polytetrafluoroethylene (PTFE) thin film used as substrates was rubbed mechanically on a glass plate. PTFE thin film was composed of a highly oriented thin layer containing a few grooves along the sliding direction. The chain axis of the PTFE macromolecules corresponding to the crystal c-axis was oriented parallel to the glass surface. Diacetylene molecules such as 4,6- decadiyn- 1,10-diol-bis-(n-butoxycarbonyl-methyl-urethane) deposited on a PTFE-coated glass plate formed disk-like or rectangular crystallites along the grooves of the PTFE film. Diacetylene molecules adsorbed their side chains almost perpendicular to the substrate surface and were aligned along the chain axis of the PTFE macromolecules
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