Nanostructuring surfaces: Deconstruction of the Pt(110)-(1x2) surface by C60

Xavier Torrelles (1) , Véronique Langlais (2) , Maurizio de Santis (3) , Hélio Tolentino (4) , Yves Gauthier (3)

1 ICMAB - Institut de Ciència de Materials de Barcelona
2 UAB - Universitat Autònoma de Barcelona = Autonomous University of Barcelona = Universidad Autónoma de Barcelona
3 NEEL - SIN - Surfaces, Interfaces et Nanostructures
4 NEEL - CRG - CRG & Grands instruments

When deposited on metal surfaces, C60 creates nanoholes. Grazing incidence x-ray diffraction reveals a c( 4x 4) reconstruction induced by C60 on Pt 110) -( 1x 2) . While the initial (1x 2) missing row is partially deconstructed, under each fullerene we find double atomic vacancy involving two Pt layers. The resulting interface is deeply modified with a 75% Pt occupancy and regularly distributed double vacancy. The orientation of the molecule is compatible with local surface cm symmetry with a pentagonal ring almost parallel to the surface while hexagonal rings are almost parallel to the (111) facets of the nanohole. The short nearestneighbor C60 distances increase the van der Waals repulsion forces that are minimized by a charge transfer between molecule and substrate involving a large number of C-Pt bonds and a reduction of 6% of the apparent diameter of the C60 molecule.

Mots clés: fullerene; surface reconstruction; missing row; GIXRD

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Xavier Torrelles, Véronique Langlais, Maurizio de Santis, Hélio Tolentino, Yves Gauthier. Nanostructuring surfaces: Deconstruction of the Pt(110)-(1x2) surface by C60. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2010, 81, pp.041404 R. ⟨10.1103/PhysRevB.81.041404⟩. ⟨hal-00992833⟩