ABSTRACT
LBL method is based on the electrostatic force between polyanions and polycations. Generally, in the LBL adsorption process, the substrate (after proper pretreatment) is immersed in a beaker containing either a polycationic or polyanionic solution for a given period of time (usually a few minutes), and then washed in a solution of approximately the same pH to remove nonadsorbed molecules. The substrate is then immersed in another solution containing the oppositely charged polymer and washed again. By repeating the alternate adsorption steps in oppositely charged polyelectrolyte solutions, a multilayer structure can be formed. A schematic illustration of the formation of multilayer structures composed of polyelectrolytes or other charged molecular or colloidal objects is shown in Figure 8.1.
