Diffusion coefficients in a lamellar lyotropic phase: evidence for defects connecting the surfactant structure

作者: Doru Constantin , Patrick Oswald

DOI: 10.1103/PHYSREVLETT.85.4297

关键词:

摘要: We measure diffusion coefficients in the lamellar phase of nonionic binary system C12EO6 using fluorescence recovery after photobleaching (FRAP). The coefficient across lamellae shows an abrupt increase upon approaching lamellar-isotropic transition. interpret this feature terms defects connecting surfactant structure. An estimation defect density and variation energy close to transition is given a simple model.

参考文章(22)
Jacob N. Israelachvili, Intermolecular and surface forces ,(1985)
Manuel Allain, Jean-Marc Di Meglio, Highly Curved Defects in Lyotropic Lamellar Phases Molecular Crystals and Liquid Crystals. ,vol. 124, pp. 115- 124 ,(1985) , 10.1080/00268948508079469
Reinhard Strey, W. Jahn, G. Porte, P. Bassereau, Freeze fracture electron microscopy of dilute lamellar and anomalous isotropic (L3) phases Langmuir. ,vol. 6, pp. 1635- 1639 ,(1990) , 10.1021/LA00101A003
R. Strey, I. Experimental Facts: Water‐Nonionic Surfactant Systems, and the Effect of Additives Berichte der Bunsengesellschaft für physikalische Chemie. ,vol. 100, pp. 182- 189 ,(1996) , 10.1002/BBPC.19961000303
L. Paz (Quintero), J.M. Di Meglio, R. Ober, M. Dvolaitzky, C. Taupin, Highly curved defects in lyotropic (nonionic) lamellar phases. Origin and role in hydration process The Journal of Physical Chemistry. ,vol. 88, pp. 3415- 3418 ,(1984) , 10.1021/J150660A010
L. Sallen, P. Sotta, P. Oswald, Pretransitional Effects Near the Hexagonal−Micellar Phase Transition of the C12EO6/H2O Lyotropic Mixture Journal of Physical Chemistry B. ,vol. 101, pp. 4875- 4881 ,(1997) , 10.1021/JP963010O
Y. Rancon, J. Charvolin, Fluctuations and phase transformations in a lyotropic liquid crystal The Journal of Physical Chemistry. ,vol. 92, pp. 6339- 6344 ,(1988) , 10.1021/J100333A032