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DODAB and DODAC bilayer-like aggregates in the micromolar surfactant concentrat...
Feitosa, Eloi; Alves, Fernanda Rosa; Castanheira, Elisabete M. S.; Oliveira, M. ElisabeteIn the millimolar concentration domain (typically 1 mM), dioctadecyldimethylammonium bromide and chloride (DODAX, X representing Br- or Cl- counterions) molecules assemble in water as large unilamellar vesicles. Differential scanning calorimetry (DSC) is a suitable technique to obtain the melting temperature (Tm) characteristic of surfactant bilayers, while fluorescence spectroscopy detects formation of surfact...
Vesicle-micelle transition in aqueous mixtures of the cationic dioctadecyldimet...
Alves, Fernanda Rosa; Zaniquelli, M. Elisabete; Loh, Watson; Castanheira, Elisabete M. S.; Oliveira, M. Elisabete; Feitosa, EloiThe vesicle-micelle transition in aqueous mixtures of dioctadecyldimethylammonium and octadecyltrimethylammonium bromide (DODAB and C18TAB) cationic surfactants, having respectively double and single chain, was investigated by differential scanning calorimetry (DSC), steady state fluorescence, dynamic light scattering (DLS) and surface tension. The experiments performed at constant up to 1.0 mM total surfactant...
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