Study of C60/Au(110)-p(6x5) reconstruction from In-plane X-Ray diffraction data

Area of Science:

• Surface science
• Materials science
• Nanotechnology

Background:

• Fullerene molecules adsorbed on surfaces present unique structural and electronic properties.
• The gold(110)-p(1x2) surface is a well-defined anisotropic substrate for studying molecular adsorption.
• Previous scanning tunneling microscopy studies suggested a simpler interface structure.

Purpose of the Study:

• To elucidate the precise atomic structure of fullerene molecules adsorbed on the Au(110)-p(1x2) surface.
• To investigate the interface complexity beyond previous scanning tunneling microscopy observations.
• To determine the arrangement of gold atoms and fullerene molecules at the interface.

Main Methods:

• Surface X-ray diffraction (SXRD) was employed to collect experimental data.
• Two-dimensional (2D) "direct methods" difference sum function was applied to solve the superstructure.
• Analysis of the SXRD data allowed for atomic-level structural determination.

Main Results:

• An ordered p(6x5) superstructure was identified for fullerene molecules on the Au(110)-p(1x2) surface.
• The fullerene-gold interface is significantly more complex than previously reported.
• A substantial number of gold surface atoms are displaced, forming microscopic pits that host the fullerene molecules.

Conclusions:

• The atomic structure of the fullerene-gold interface is characterized by significant surface reconstruction.
• Microscopic gold pits play a crucial role in accommodating fullerene molecules.
• This detailed structural understanding advances the field of surface science and molecular adsorption on metallic substrates.