Abstract
The interfacial properties of the spread Langmuir films of C 60Br 24 and stearic acid have been studied at air–water interface by measuring their surface pressure–area isotherms. Monolayer studies on C 60Br 24 suggest a strong aggregation at air–water interface which corroborated the ab initio electron density calculations. The mixed films were found to be immiscible and non-ideal with an exception of X C 60 Br 24 = 0.5 which is the composition of greater stability. The interaction between C 60Br 24 and stearic acid results in the lowering of surface pressure withstood by stearic acid and hence the decrease in compressibility with the increasing X C 60 Br 24 , thereby indicating the domination of C 60Br 24 characteristics in the mixed monolayers.
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