• DOI:10.1063/1.2483389
• Corpus ID: 27498112

Atomic force microscopy images of lyotropic lamellar phases.

@article{Garza2007AtomicFM,
  title={Atomic force microscopy images of lyotropic lamellar phases.},
  author={Cristina Garza and Leila Thomazelli Thieghi and Rolando Castillo},
  journal={The Journal of chemical physics},
  year={2007},
  volume={126 5},
  pages={
          051106
        }
}

• C. Garza, L. T. Thieghi, R. Castillo
• Published 7 February 2007
• Physics
• The Journal of chemical physics

For the very first time, atomic force microscope images of lamellar phases were observed combined with a freeze fracture technique that does not involve the use of replicas. Samples are rapidly frozen, fractured, and scanned directly with atomic force microscopy, at liquid nitrogen temperature and in high vacuum. This procedure can be used to investigate micro-structured liquids. The lamellar phases in Sodium bis(2-ethylhexyl) sulfosuccinate (AOT)/water and in C12E5/water systems were used to asses this new technique. Our observations were compared with x-ray diffraction measurements and with other freeze fracture methods reported in the literature. Our results show that this technique is useful to image lyotropic lamellar phases and the estimated repeat distances for lamellar periodicity are consistent with those obtained by x-ray diffraction.