tautomerism Derjaguin–Landau–Verwey–Overbeek theory Hamaker diagram Poisson – Boltzmann equation Stern layer absorption spectra acetonitrile-DMSO binary solvent anionic lactones buffer solutions cetyltrimethylammonium chloride critical concentration of coagulation dissociation constants dissociation in solution electrokinetic potential electrostatic factor electrostatic potential fullerene C70 hydrosol fullerene–fullerene Hamaker constant inversion of the constants of stepwise dissociation nitrofluorescein dyes organized solutions polyprotic acids relation between the constants sodium chloride solvent-accessible surface statistical factor structural contribution to the inter-particle interaction surfactant micelle