Supramolecular "leeks" of a fluorinated hybrid amphiphile that self-assembles into a disordered columnar phase

Mohan N. Wadekar, Ludmila Abezgaus, Kristina Djanashvili, Wolter F. Jager*, Eduardo Mendes, Stephen J. Picken, Danino Dganit

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We report on the formation of unprecedented "leek"-shaped aggregates of an anionic fluoroalkyl sulfonate surfactant (FS) and the supramolecular assembly of these aggregates into a disordered columnar phase (CS). The leeks are formed by wrapping of 2-4 FS-water bilayers of thickness 26-28 Å into 10-20 nm thick and >100 nm long structures, in the concentration regime of 63-70 wt % FS. A lamellar (Lα) lyotropic liquid-crystalline (LLC) phase forms at higher concentration, between 70 and 84 wt %. In the two LLC phases, the FS molecules were organized in an interdigitated or tilted fashion, or a combination of the two. Such a unique supramolecular self-assembly of amphiphiles has not been predicted nor observed before. This self-assembly behavior could be of interest to various fields like microencapsulation, nanomedicine, and membrane protein crystallization.

Original languageEnglish
Pages (from-to)2820-2826
Number of pages7
JournalJournal of Physical Chemistry B
Volume117
Issue number9
DOIs
StatePublished - 7 Mar 2013
Externally publishedYes

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