Table 2.

Effective lipopolymer radii a_e (nm) obtained from theoretical interpretations of the measured concentration dependence of self- and gradient diffusion coefficients of lipopolymer DSPE-PEG2k-CF in DOPC. Note that the PEG2k Flory radius R_F ≈ 3.83 nm and the lipid head radius a_l ≈ 0.46 nm (see text for details). HC, hard cylinders; SR, soft repulsion; HI, hydrodynamic interaction.

model	Ds	Dg
HC [10]	2.41	3.03
SR [10]	2.92	2.98
HC and HI [14]	2.70	—