L-Tyrosine on Ag(111): Universality of the Amino Acid 2D Zwitterionic Bonding Scheme? (Articolo in rivista)

Type
Label
  • L-Tyrosine on Ag(111): Universality of the Amino Acid 2D Zwitterionic Bonding Scheme? (Articolo in rivista) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/nn901669p (literal)
Alternative label
  • Reichert, Joachim; Schiffrin, Agustin; Auwaerter, Willi; Weber-Bargioni, Alexander; Marschall, Matthias; Dell'Angela, Martina; Cvetko, Dean; Bavdek, Gregor; Cossaro, Albano; Morgante, Alberto; Barth, Johannes V. (2010)
    L-Tyrosine on Ag(111): Universality of the Amino Acid 2D Zwitterionic Bonding Scheme?
    in ACS nano; ACS, American chemical society, Washington, DC (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Reichert, Joachim; Schiffrin, Agustin; Auwaerter, Willi; Weber-Bargioni, Alexander; Marschall, Matthias; Dell'Angela, Martina; Cvetko, Dean; Bavdek, Gregor; Cossaro, Albano; Morgante, Alberto; Barth, Johannes V. (literal)
Pagina inizio
  • 1218 (literal)
Pagina fine
  • 1226 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://pubs.acs.org/doi/abs/10.1021%2Fnn901669p (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 4 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1. Univ British Columbia, Dept Chem, Vancouver, BC V6T 1Z4, Canada 2. Max Planck Inst Quantenopt MPQ, D-85748 Garching, Germany 3. Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z4, Canada 4. Tech Univ Munich, Phys Dept E20, D-85748 Garching, Germany 5. Lab Nazl TASC, INFM, CNR, Trieste, Italy 6. Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy 7. Univ Ljubljana, Dept Phys, SI-1000 Ljubljana, Slovenia (literal)
Titolo
  • L-Tyrosine on Ag(111): Universality of the Amino Acid 2D Zwitterionic Bonding Scheme? (literal)
Abstract
  • We present a combined study of the adsorption and ordering of the L-tyrosine amino acid on the dose-packed Ag(111) noble-metal surface in ultrahigh vacuum by means of low-temperature scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS) and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy. On this substrate the biomolecules self-assemble at temperatures exceeding 320 K into linear structures primarily following specific crystallographic directions and evolve with larger molecular coverage into two-dimensional nanoribbons which are commensurate with the underlying atomic lattice. Our high resolution topographical STM data reveal noncovalent molecular dimerization within the highly ordered one-dimensional nanostructures, which recalls the geometrical pattern already seen in the L-methionine/Ag(111) system and supports a universal bonding scheme for amino acids on smooth and unreactive metal surfaces. The molecules desorb for temperatures above 350 K, indicating a relatively weak interaction between the molecules and the substrate. XPS measurements reveal a zwitterionic adsorption, whereas NEXAFS experiments show a tilted adsorption configuration of the phenol moiety. This enables the interdigitation between aromatic side chains of adjacent molecules via parallel-displaced pi-pi interactions which, together with the hydrogen-bonding capability of the hydroxyl functionality, presumably mediates the emergence of the self-assembled supramolecular nanoribbons. (literal)
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