Deposition Mechanisms in Layer-by-Layer or Step-by-Step Deposition Methods: From Elastic and Impermeable Films to Soft Membranes with Ion Exchange Properties

Figure 1

Evolution of the thickness increment per layer pair for PEI-(PSS-PAH)_n films deposited on glass substrates from a Tris (Tris(hydroxymethyl)aminomethane) buffer at pH = 7.4 in the presence of NaCl at different concentrations. The data have been plotted as the film thickness increment versus the NaCl concentration at a power α, with α = 0.10. The film thickness has been measured by means of scanning angle reflectometry. Plotted with the data from [29].