Catanionic Tubules with Tunable Charge

Balancing the positives and negatives: A new behavior in the field of catanionic mixtures was observed in solutions of anionic and cationic forms of rigid non-conventional amphiphiles. Dilute aqueous mixtures of anionic and cationic bile salt derivatives form catanionic tubules with charge ranging from negative to positive values depending on the surfactant molar ratio of the mixtures. © 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.