Adsorption of Poly(propylene imine) Dendrimers on Glass. An Interplay between Surface and Particle Properties

摘要: The adsorption behavior of positively charged poly(propylene imine) dendrimers on glass has been studied by scanning angle reflectometry as a function generation, pH, and ionic strength. results indicate that the is controlled properties both (size charge) surface layer (distribution sites). At constant pH strength collector remain same, scales with dendrimer size. Because limited number sites there only 15% coverage at maximum. Adsorption increases decreasing increasing strength, effect much more pronounced for smaller dendrimers. To explain results, not size charge have to be taken into account, but also density roughness surface. This implies comparable characteristic length scale roughness.