Enhanced fullerene-Au(111) coupling in (2√3 × 2√3)R30° superstructures with intermolecular interactions
Michael Paßens1, Rainer Waser2, Silvia Karthäuser1
1Peter Grünberg Institut (PGI-7) and JARA-FIT, Forschungszentrum Jülich GmbH, 52428 Jülich, Germany.
Beilstein Journal of Nanotechnology
|July 23, 2015
Summary
Fullerene superstructures on gold surfaces are influenced by deposition conditions. Vacancy-adatom pairs forming at room temperature impact C60 arrangement and electronic properties.
Area of Science:
- Surface science
- Condensed matter physics
- Materials science
Background:
- Fullerenes form ordered structures on surfaces.
- Gold(111) is a common substrate for studying surface phenomena.
- Superstructure formation depends on deposition and growth conditions.
Purpose of the Study:
- Investigate fullerene superstructures on Au(111).
- Determine the role of deposition and growth processes.
- Analyze the impact of vacancy-adatom pairs on superstructure formation and electronic properties.
Main Methods:
- Scanning tunneling microscopy (STM)
- Scanning tunneling spectroscopy (STS)
- Differential conductivity (dI/dV) spectroscopy
Main Results:
- Disordered and uniform (2√3 × 2√3)R30° fullerene superstructures observed.
- Vacancy-adatom pair formation at room temperature influences C60 appearance in STM.
- These pairs lead to both disordered and uniform superstructures with altered electronic properties.
- Lifting of LUMO/LUMO+1 orbital degeneracy and hybrid fullerene-Au(111) states observed.
Conclusions:
- Fullerene deposition and growth on Au(111) dictate superstructure formation.
- Room temperature vacancy-adatom pair formation significantly affects C60 superstructures.
- Intermolecular interactions, potentially mediated by Au adatoms, are crucial.
- Electronic structure changes indicate partial covalent bonding between fullerene and Au(111).
Keywords:
Ising modeladatom–vacancy mechanismdifferential conductancefullerenescanning tunnelling microscopyMore Related Videos
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