Langmuir-Blogdett (LB) monolayers of behenic acid (BA) and cadmium behenic were prepared on mica surfaces by the vertical precipitation method. Atomic force microscopy (AFM) and lateral force microscopy (LFM) were used to study the morphologies of the films before and after reorganization and friction image. The LB films of fatty acid were found to self-organize into multilayers in water simply by the addition or removal of one layer of molecules, suggesting that the reorganization is a common phenomenon for monolayer on substrates in water conditions. It is considered that the H2O molecules in the first place interact with the BA amphiphilic molecules at the edge of the pinholes. The assembly of molecules at the edge of the pinholes changes with a little protuberance in the morphology. The reorganization extent was also relevant to the pH value of the water medium.
Langmuir-Blogdett (LB) films, atomic force microscopy (AFM), molecular reorganization
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