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We 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...
The adsorption of S-histidine on gold and copper well-defined surfaces has been characterised by reflection absorption infrared spectroscopy (RAIRS), a surface technique that gives chemical as well as orientational information. Analyses were carried out in a UHV chamber. The RAIRS data are in agreement with the following conclusions. Under low pressure of histidine, 10 −8 mbar, histidine molecules...
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