MOLECULAR-CONFORMATION AND APPLICATION OF STEREOREGULAR PMMA LANGMUIR-BLODGETT-FILMS

Molecular conformations of stereoregular poly(methyl methacrylate) (PM MA) monolayers have been investigated by scanning probe microscopes. I sotactic and syndiotactic PMMAs were found to have right and left hand helical structures, respectively. On the contrary atactic PMMA showed rather random arrangement of the chains. It has been demonstrated tha t the PMMA Langmuir-Blodgett (LB) films can be utilized to form nanosc ale patterns down to 50 nm and to form a geodesic lens. It has also be en manifested that the quantum efficiency of a polymer electroluminesc ent device can be significantly enhanced by inserting the PMMA LB film s between the emitting layer and the cathode. All the applications uti lize the unique characteristics of the LB films to form thin and unifo rm films in the molecular level.