Both thermodynamic and microenvironmental properties of the micelles for a series of cationic surfactants hexadecyltrimethylammonium (C16TAX) with different counterions, F-, Cl-, Br-, NO-3, and 1/2;SO42-, have been studied. Critical micelle concentration (CMC), degree of micelle ionization (α), and enthalpy of micellization (ΔHmic) have been obtained by conductivity measurements and isothermal titration microcalorimetry. Both the CMC and the α increase in the order SO2-4
