Wünsche, J.Rosei, F.Graeff, Carlos Frederico de Oliveira [UNESP]Santato, C.2014-05-272014-05-272011-08-01ECS Transactions, v. 35, n. 7, p. 75-81, 2011.1938-58621938-6737http://hdl.handle.net/11449/72573We present a study on the thin film morphology and the optical properties of eumelanin resulting from different synthesis routes: the oxidation of tyrosine with hydrogen peroxide, the auto-oxidation of dihydroxyphenylanaline in water and its auto-oxidation in dimethyl sulfoxid. Atomic Force Microscopy images indicate that the presence of holes and particles depends on the eumelanin synthesis route and the substrate employed. Smooth films with very few defects could be obtained with eumelanin synthesized in dimethyl sulfoxide deposited on glass substrates. Our study shows that all eumelanin preparations are comparable in terms of thin film morphology on the submicrometer scale and UV-visible transmission properties. ©The Electrochemical Society.75-81engAtomic forceAutooxidationEumelaninsGlass substratesSubmicrometer scaleSynthesis routeThin film morphologyTransmission propertyUV-visibleAmino acidsAtomic force microscopyDimethyl sulfoxideFilm growthHydrogen peroxideMedical applicationsOptical propertiesOxidationSubstratesThin filmsMorphologyTrabalho apresentado em evento10.1149/1.3571978Acesso aberto2-s2.0-799607563050000-0003-0162-8273