Table 1.

Physicochemical properties of the surfactants.

surfactants	CMC mmol l−1	γ∞ (at 0.1 mM) mN m−1	Γ∞ mmol m−2
surfactin	2.3 × 10−2	1.985	1.62 × 10−3
5-SCBS	1.2 × 10−2	0.354	4.97 × 10−3
8-SCBS	1.1 × 10−2	0.064	2.58 × 10−3