The adsorption of polysaccharides onto solid substrates provides an environment for the immobilization of biomolecules [1] giving rise to conditions for the development of biosensors [2] and kits for immunoassays. One can find in the literature reports about the adhesion of proteins on cellulose ester membranes [3]. However, studies about the formation of cellulose ester ultrathin films have been seldom reported. Cellulose esters are nontoxic materials largely used as coating layers, fibers, inks and films.