We studied [15] the effect of various cationic surfactants
(decylammonium bromide, cetyltrimethylammonium bromide,
cetylpyridinium bromide, carbethopendecinium bromide)
and we have found that the last of them is the most
suitable because of its high solubility and the low value of
critical micelle concentration (cmc = 1 × 10−4M in the
presence of 0.1M KCl [16]).