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Effects of potassium on the supramolecular structure and electronic properties of eumelanin thin films.
- Source :
-
Langmuir : the ACS journal of surfaces and colloids [Langmuir] 2010 Dec 21; Vol. 26 (24), pp. 19007-13. Date of Electronic Publication: 2010 Nov 15. - Publication Year :
- 2010
-
Abstract
- The role of potassium in the formation of synthetic eumelanin aggregates is investigated by atomic force microscopy and soft-X-ray spectroscopy. Control over the thin film granularity is achieved by using K salts, in both drop casting and electrodeposition of eumelanin thin films. Further control over orientation is made possible by a suitable choice of the substrate: evidence of self-assembly is found for thin films deposited on gold. Finally, it is shown that the potassium content affects not only the samples morphology, but also the low-lying states in the valence band, where a transfer of spectral weight across the HOMO-LUMO gap is observed, disclosing possible applications of this multifunctional biomacromolecule.
Details
- Language :
- English
- ISSN :
- 1520-5827
- Volume :
- 26
- Issue :
- 24
- Database :
- MEDLINE
- Journal :
- Langmuir : the ACS journal of surfaces and colloids
- Publication Type :
- Academic Journal
- Accession number :
- 21077619
- Full Text :
- https://doi.org/10.1021/la102973u