relatively new method of multilayer structure deposition
Decher and Hong
. It is based on consecutive physical adsorption
of alternatively charged molecules from the solutions onto solid
substrate. Thus, the driving force of adsorption is the ionic
attraction between opposite charges and no covalent bonds need
to be formed.
form a monolayer of a given type must be of bipolar structure
with identical charges at the ends. In this case the process of
adsorption stops itself after full covering of the surface
because electrostatic repulsion between identically charged
molecules prevents further adsorption. The process can be
continued only if the substrate with previously deposited
monolayer is immersed in the solution of oppositely charged
layer-by-layer adsorption was first developed for cationic and
anionic bipolar amphiphiles. Then it was extended to alternate
deposition of amphiphiles with polyelectrolytes,
polyelectrolites of different types, polyelectrolytes with
proteins, and polyelectrolytes with nucleic acids.
of complex compositions including the films built up by the
combination of LB and layer-by-layer adsorption methods were
also prepared and investigated.
of the method