Langmuir-Blodgett and Self-Assembled Polymeric Films

Mechanisms of adsorption of an azo-polyelectrolyte onto layer-by-layer films

“…Consequently, the polyelectrolyte adsorption kinetics has a characteristic time which is dependent of the polyelectrolyte diffusion process in the solvent and of the polyelectrolyte interactions with the substrate, assuming that the polyelectrolyte concentration, pH and ionic strength and other factors as temperature and pressure are held constant during adsorption. With the advent of the layer-by-layer (LbL) technique [2][3][4], which consists of sequential adsorption cationic and anionic polyelectrolytes from aqueous solutions onto solid substrates, with the adsorption taking place at a planar substrate during a determined period of time. Both, the experimental procedure and, consequently, the adsorption kinetics are different.…”

UV degradation of deoxyribonucleic acid

“…A simple and versatile method for producing these architectures is the sequential build up of layers of functional materials by the layer-by-layer (LBL) technique [12,13]. This technique, initially applied to the production of polyelectrolyte thin films, has also been found to be suitable for the production of functionalized biomolecular architectures [14,15,16,17,18] and is therefore a relevant methodology for producing biological mimics to address radiation damage studies.…”

Biomimetic Heterostructures for Radiation Damage Studies

“…The layer-by-layer (LbL) technique was developed by G. Decher and co-workers in 1992 and prehminary used for the buildup layered heterostructures of polyelectrolytes [4][5][6][7][8][9]. The production of LbL films consists on the alternated adsorption of polyelectrolytes of opposite electrical charges from aqueous solutions into solid surfaces, according to the following procedure: a sohd substrate is immersed in a polycationic (or polyanionic) solution during a given period of time, after which the substrate with the adsorbed film is washed in pure water or in an aqueous solution with the same pH of the polyelectrolyte solution; the substrate is then immersed in the polyanionic (or polycationic) solution to complete a bilayer, substrate plus bilayer, being again washed to remove the weakly adsorbed molecules.…”