Polypeptide multilayer films of (PLL/PLGA)3.5/CapsuleRhoB-PLGA/(PLL/PLGA)10.5 loaded with FITC-gentamicin for (a) 3, (b) 8, and (c) 15 min. FITC-gentamicin and RhoB-PLGA were visualized at (a1, b1, and c1) 480 and (a2, b2 and c2) 560 nm, respectively.