Ultra high vacuum deposition of L-Cysteine on Au(110) studied by high resolution X-Ray Photoemission: from early stages of adsorption to molecular organization (Articolo in rivista)

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  • Ultra high vacuum deposition of L-Cysteine on Au(110) studied by high resolution X-Ray Photoemission: from early stages of adsorption to molecular organization (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/jp051549t (literal)
Alternative label
  • Grazia Gonella; Silvana Terreni; Dean Cvetko; Albano Cossaro; Lorenzo Mattera; Ornella Cavalleri; Ranieri Rolandi; Alberto Morgante; Luca Floreano; Maurizio Canepa (2005)
    Ultra high vacuum deposition of L-Cysteine on Au(110) studied by high resolution X-Ray Photoemission: from early stages of adsorption to molecular organization
    in The journal of physical chemistry. B
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Grazia Gonella; Silvana Terreni; Dean Cvetko; Albano Cossaro; Lorenzo Mattera; Ornella Cavalleri; Ranieri Rolandi; Alberto Morgante; Luca Floreano; Maurizio Canepa (literal)
Pagina inizio
  • 18003 (literal)
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  • 109 (literal)
Rivista
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  • 7 (literal)
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  • Grazia Gonella,+,?; Silvana Terreni,+; Dean Cvetko,?; Albano Cossaro,§; Lorenzo Mattera,+; Ornella Cavalleri,+; Ranieri Rolandi,+; Alberto Morgante,§,|; Luca Floreano,§; and Maurizio Canepa,*,+ + Dipartimento di Fisica, UniVersita` di GenoVa, Via Dodecaneso 33, 16146 GenoVa; ? Italy, Department of Physics, UniVersity of Ljubliana, Ljubliana, SloVenia; § Laboratorio INFM/TASC, Trieste, Italy; | Dipartimento di Fisica, UniVersita` di Trieste, Trieste, Italy (literal)
Titolo
  • Ultra high vacuum deposition of L-Cysteine on Au(110) studied by high resolution X-Ray Photoemission: from early stages of adsorption to molecular organization (literal)
Abstract
  • We report on a high-resolution X-ray photoemission spectroscopy study on molecular-thick layers of L-cysteine deposited under ultrahigh vacuum conditions on Au(110). The analysis of core level shifts allowed us to distinguish unambiguously the states of the first-layer molecules from those of molecules belonging to the second layer. The first-layer molecules strongly interact with the metal through their sulfur headgroup. The multipeaked structure of the N 1s, O 1s, and C 1s core levels is interpreted in terms of different molecular moieties. The neutral acidic fraction (HSCH2CH(NH2)COOH) is abundant at low coverage likely associated with isolated molecules or dimers. The zwitterionic phase (HSCH2CH(NH3+)COO-) is largely dominant as the coverage approaches the monolayer limit and is related to the formation of ordered self-assembled molecular structures indicated by electron diffraction patterns. The occurrence of a small amount of cationic molecules (HSCH2CH(NH3+)COOH) is also discussed. The second-layer molecules mainly display zwitterionic character and are weakly adsorbed. Mild annealing up to 100 °C leads to the desorption of the second-layer molecules leaving electronic states of the first layer unaltered. (literal)
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