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HL: Fachverband Halbleiterphysik

HL 9: Poster 1

HL 9.87: Poster

Montag, 23. März 2009, 14:30–17:00, P2

Structural and electronic properties of melanin-like materials — •Falk Tandetzky, Frank Ortmann, Karsten Hannewald, and Friedhelm Bechstedt — IFTO & ETSF, Friedrich-Schiller-Universität Jena, Jena, Germany

The macromolecule melanin which is primarily known as a pigment has also attracted recent interest as a possible high-tech functional material with potential electronic applications. However, the complexity of its structure as well as the relationship to its electronic properties is still not fully understood [1]. Here, we present ab initio studies for the structural, energetic, and electronic properties of various molecular building blocks (monomers, dimers, and tetrameric rings) of eumelanin. The band structure of one-dimensional stacks composed of such units are calculated and consequences for the charge transport along the stacks are discussed.