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Título

Do peptide nucleic acids form self-assembled monolayers on pyrite surfaces?

AutorMateo-Martí, Eva ; Rogero, Celia ; Briones, Carlos ; Martín-Gago, José A.
Palabras clavePeptide nucleic acid
Gold
Pyrite
X-ray photoemission spectroscopy
X-ray absorption near-edge spectroscopy
Fecha de publicación18-abr-2007
EditorElsevier
CitaciónSurface Science 601(18): 4195-4199 (2007)
ResumenWe have characterized the adsorption of thiol-modified peptide nucleic acid (PNA) molecules on a natural pyrite surface by means of X-ray photoelectron spectroscopy (XPS) and X-ray absorption near-edge spectroscopy (XANES) techniques. Whereas single stranded PNA forms partially-ordered self-assembled monolayers (SAMs) on gold surfaces, no preferential orientation of PNA is observed upon adsorption on pyrite (FeS2) surfaces. The N1(s) XPS core level peak of PNA has been decomposed in curve-components, and every component has been assigned to different chemical species. This analysis shows that in pyrite the PNA nucleobases interact with the iron from the surface rather than by the sulfur of the thiolated molecule.
Descripción5 pages, 3 figures, 1 table.-- ISI Article Identifier: 000250414600112.-- Printed version Sep 15, 2007.-- Issue title: ECOSS-24, Proceedings of the 24th European Conference on Surface Science (Paris, Sep 4-8, 2006).
Versión del editorhttp://dx.doi.org/10.1016/j.susc.2007.04.081
URIhttp://hdl.handle.net/10261/13068
DOI10.1016/j.susc.2007.04.081
ISSN0039-6028
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