Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
214584 | International Journal of Mineral Processing | 2009 | 4 Pages |
Abstract
The adsorption of oleic acid / oleate on fluorite surface could be visualized using tapping mode of atomic force microscopy (AFM). The natural fluorite crystals were equilibrated with 10− 3 to 10− 7 M oleate solutions and their AFM images at each concentration along with height profiles were recorded. Even at low oleate concentration of 1 × 10− 7 M, concomitant monolayer and bilayer structures were observed. It suggests that normal–normal bonding of hydrocarbon chains takes place before the surface is completely covered by the monolayer. Multi-layer adsorption of oleate was observed at oleate concentrations of above 10− 4 M. The tapping mode AFM can be utilized to visualize the topography of surfaces adsorbed with surfactant molecules.
Related Topics
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Chemical Engineering
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Authors
K. Chennakesavulu, G. Bhaskar Raju, S. Prabhakar, C. Madhavan Nair, K.V.G.K. Murthy,