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Force curves and fits (head group overlap + van der Waals) between DPPC bilayers in 0 mol% and 5 mol% glycerol solutions in (A) the repulsive regime and (B) the attractive regime. Average fitting parameters for 5% glycerol force runs were as follows: L = 0.68 ± 0.03 nm, s = 1.5 ± 0.1 nm, Do,brush = 0.96 ± 0.04 nm, fitted A = (5.3 ± 0.3) × 10−21 J, theoretical A = 5.4 × 10−21 J, and Do,vdw = 1.05 nm.
