Abstract
Excellent Langmuir-Blodgett films (LB) of non-amphiphilic coronene (COR) have been prepared by mixing with a long chain fatty acid, viz., arachidic acid (AA) and an inert polymer such as poly methyl methacrylate (PMMA) separately. Miscibility of the guest and host molecules in the mixed monolayer of COR and AA/PMMA have been studied with excess area criterion. Both the attractive and repulsive interactions are present in the COR/AA mixed monolayer, whereas only repulsive interaction is active between the component molecules of COR/PMMA mixed monolayer. Spectroscopic properties of COR in solution and mixed LB films have been compared by UV-Vis absorption spectroscopy. Surface morphology of mixed LB films has been examined by atomic force microscopy (AFM). Absorption spectroscopic study complemented with AFM image suggests the formation of some kind of aggregates in the mixed LB films.
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