Walking peptide on Au(110) surface: Origin and nature of interfacial process
| Autor: | Amina Taleb, Anne Vallée, Claire-Marie Pradier, Ahmed Naitabdi, Vincent Humblot, Jessem Landoulsi, Antonio Tejeda |
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| Přispěvatelé: | Laboratoire de Réactivité de Surface (LRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Institut Jean Lamour (IJL), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut des Nanosciences de Paris (INSP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2014 |
| Předmět: |
Insulin growth factor (IGF)
Photoemission spectroscopy Ultra-high vacuum 02 engineering and technology Substrate (electronics) 010402 general chemistry 01 natural sciences AR-XPS Microscopy Materials Chemistry [CHIM]Chemical Sciences Molecule Au(110) STM Quantum tunnelling Low-energy electron diffraction Chemistry Surfaces and Interfaces 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Surfaces Coatings and Films Crystallography Surface reconstruction Peptides 0210 nano-technology |
| Zdroj: | Surface Science Surface Science, Elsevier, 2014, 628, pp.21-29. ⟨10.1016/j.susc.2014.05.004⟩ Surface Science : A Journal Devoted to the Physics and Chemistry of Interfaces Surface Science : A Journal Devoted to the Physics and Chemistry of Interfaces, 2014, 628, pp.21-29. ⟨10.1016/j.susc.2014.05.004⟩ |
| ISSN: | 0039-6028 1879-2758 |
| Popis: | International audience; IGF tri-peptide adsorption on Au(110)-(1 × 2) under Ultra High Vacuum (UHV) conditions has been investigated using surface science techniques such as synchrotron based Angle Resolved X-ray Photoemission Spectroscopy (AR-PES or AR-XPS), Low Energy Electron Diffraction (LEED) and Scanning Tunnelling Microscopy (STM). The behaviour of IGF molecules has been revealed to be coverage dependent; at low coverage, there is formation of islands presenting a chiral self-organised molecular network with a (4 2, − 3 2) symmetry as shown by Low Energy Electron Diffraction (LEED) and Scanning Tunnelling Microscopy (STM) on the unaltered Au(110)-(1 × 2) reconstruction, suggesting significant intermolecular interactions. When the coverage is increased, the islands grow bigger, and one can observe the disappearance of the self-organised network, along with a remarkable destruction of the (1 × 2) substrate reconstruction, as shown by STM. The effect of IGF on the surface gold atoms has been further confirmed by angle-resolved photoemission measurements which suggest a modification of the electronic states with the (1 × 2) symmetry. The resulting molecular organisation, and overall the gold surface disorganisation, prove a strong surface-molecule interaction, which may be probably be explained by a covalent bonding. |
| Databáze: | OpenAIRE |
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