X-ray-diffraction characterization of Pt(111) surface nanopatterning induced by C60 adsorption.
Nat Mater
; 4(9): 688-92, 2005 Sep.
Article
en En
| MEDLINE
| ID: mdl-16113682
ABSTRACT
Understanding the adsorption mechanisms of large molecules on metal surfaces is a demanding task. Theoretical predictions are difficult because of the large number of atoms that have to be considered in the calculations, and experiments aiming to solve the molecule-substrate interaction geometry are almost impossible with standard laboratory techniques. Here, we show that the adsorption of complex organic molecules can induce perfectly ordered nanostructuring of metal surfaces. We use surface X-ray diffraction to investigate in detail the bonding geometry of C(60) with the Pt(111) surface, and to elucidate the interaction mechanism leading to the restructuring of the Pt(111) surface. The chemical interaction between one monolayer of C(60) molecules and the clean Pt(111) surface results in the formation of an ordered sqrt[13] x sqrt[13]R13.9 degrees reconstruction based on the creation of a surface vacancy lattice. The C(60) molecules are located on top of the vacancies, and 12 covalent bonds are formed between the carbon atoms and the 6 platinum surface atoms around the vacancies. In-plane displacements induced on the platinum substrate are of the order of a few picometres in the top layer, and are undetectable in the deeper layers.
Buscar en Google
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Platino (Metal)
/
Difracción de Rayos X
/
Ensayo de Materiales
/
Materiales Biocompatibles Revestidos
/
Fulerenos
/
Nanoestructuras
Tipo de estudio:
Evaluation_studies
Idioma:
En
Revista:
Nat Mater
Asunto de la revista:
CIENCIA
/
QUIMICA
Año:
2005
Tipo del documento:
Article
País de afiliación:
Francia