Drastic Au(111) surface reconstruction upon insulin growth factor tripeptide adsorption.
J Am Chem Soc
; 134(15): 6579-83, 2012 Apr 18.
Article
em En
| MEDLINE
| ID: mdl-22471692
ABSTRACT
Adsorption of biomolecules at metal surfaces often creates two-dimensional ordering of the adlayers. However, metal substrate reconstruction is less commonly observed, unless upon annealing of the molecule-surface system. Here, we report on the drastic room-temperature reconstruction of the Au(111) surface, driven by the adsorption of insulin growth factor tripeptide molecules. Scanning tunneling microscopy images show that the surface reconstruction, which takes place without annealing the system, is dynamic and evolves over time. It is initiated at kinks and steps edges, but the reconstruction also takes place within defect-free terraces. Theoretical calculations are performed to explain the reconstruction at the molecular level.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Somatomedinas
/
Ouro
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article