Table 1. Results of Bilayer Formation on Four Polymer Brushes (Left Column) after Incubating with Vesicles of Different Lipid Composition (Top Row)a.
| POPC | 10% DOTAP |
25% DOTAP |
50% DOTAP |
||
|---|---|---|---|---|---|
| zeta potential ± 5 (mV) | 0 | +25 | +43 | +64 | |
| PMPC | 0 | none | none | none | none |
| PCysMA | –10 | none | none | bilayer D > 1 |
bilayer 0.1 < D > 0.9 |
| PKSPMA | –33 | none | IV, D ≈ 0 | RM bilayer/V D < 0.1 |
RM bilayer/V, D < 0.1 |
| PMAA | –43 | none | IV, D ≈ 0 | RM bilayer/V, D < 0.1 (0.3 < D* < 0.8) |
bilayer/V, D < 0.1 |
a
None signifies no or little vesicle adsorption. IV, immobile vesicles. Bilayer–bilayer has a characteristic diffusion coefficient similar to that of glass. RM bilayer, reduced-mobility bilayer. V, vesicle layer. Approximate diffusion coefficients, D, are given and have units of μm2 s–1. The D* value was obtained upon addition of 2 M NaCl.