Growth and morphology of eumelanin thin films - A future bioelectronic material?

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Wünsche, J.
Rosei, F.
Graeff, Carlos Frederico de Oliveira [UNESP]
Santato, C.

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We 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.



Atomic force, Autooxidation, Eumelanins, Glass substrates, Submicrometer scale, Synthesis route, Thin film morphology, Transmission property, UV-visible, Amino acids, Atomic force microscopy, Dimethyl sulfoxide, Film growth, Hydrogen peroxide, Medical applications, Optical properties, Oxidation, Substrates, Thin films, Morphology

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ECS Transactions, v. 35, n. 7, p. 75-81, 2011.