Characterization of surfactant coatings in capillary electrophoresis by atomic force microscopy.

@article{Baryla2001CharacterizationOS,
  title={Characterization of surfactant coatings in capillary electrophoresis by atomic force microscopy.},
  author={Nicole E. Baryla and Jeremy E. Melanson and Mark T. McDermott and Charles A. Lucy},
  journal={Analytical chemistry},
  year={2001},
  volume={73 19},
  pages={4558-65}
}
This paper describes the adsorption mechanisms and aggregation properties of cetyltrimethylammonium bromide (CTAB) and didodecyldimethylammonium bromide (DDAB) surfactants that are used for dynamic coatings in capillary electrophoresis (CE). Atomic force microscopy is used to directly visualize surfactant adsorption on fused silica. It was found that the single-chained surfactant CTAB forms spherical aggregates on silica while the double-chained surfactant DDAB forms a bilayer. Aggregation at… CONTINUE READING

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