Guanine adsorption on the Cu(110) surface

0437502 - FZÚ 2015 RIV NL eng J - Journal Article
Feyer, V. - Plekan, O. - Šutara, F. - Cháb, Vladimír - Matolín, V. - Prince, K. C.
Guanine adsorption on the Cu(110) surface.
Surface Science. Roč. 605, 3-4 (2011), s. 361-365. ISSN 0039-6028. E-ISSN 1879-2758
R&D Projects: GA AV ČR IAA100100905
Institutional research plan: CEZ:AV0Z10100521
Keywords : guanine * copper * chemisorption * hydrogen bond
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 1.994, year: 2011

The adsorption of guanine on Cu(110) has been studied by soft X-ray photoelectron spectroscopy (XPS) and near edge X-ray absorption fine structure (NEXAFS) spectroscopy. The valence band spectra, carbon and nitrogen is XPS and N K-edge absorption spectra were measured for a thin film, sub-monolayer and saturation coverage. We show that hydrogen bonding causes a significant core level shift in the thin film. At saturation coverage, guanine is tilted at 70 degrees with respect to the surface, and bonds through the N1 nitrogen atom. On reducing the coverage, the orientation changes and the tilt angle of the molecular plane is reduced. For both coverages, guanine is singly deprotonated at the N1 site, and annealing to a higher temperature (500 K) is probably accompanied by further deprotonation of the amino groups.
Permanent Link: http://hdl.handle.net/11104/0241061