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Formation of composite C60-perylene layers on a silver substrate
Yimin Guan1, Kirill Bobrov1, Laurent Guillemot1
1Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, Orsay 91405, France.
The Journal of Chemical Physics
|May 22, 2025
Summary
This study shows how C60 fullerenes self-assemble on perylene multilayers on a silver surface. The perylene structure guides fullerene aggregation, forming aligned structures driven by intermolecular interactions.
Area of Science:
- Surface Science
- Nanotechnology
- Materials Chemistry
Background:
- Bottom-up nanofabrication utilizes molecular self-assembly for creating complex architectures.
- Organic molecules and fullerenes are key building blocks in molecular self-assembly.
Purpose of the Study:
- Investigate the formation of composite layers of C60 fullerene and perylene on an Ag(110) substrate.
- Understand the self-assembly behavior of C60 fullerene on a pre-formed perylene multilayer.
Main Methods:
- Scanning Tunneling Microscopy (STM) at room temperature for molecular-scale observation.
- Computational modeling to analyze intermolecular interactions.
- Deposition of C60 fullerene onto a perylene multilayer on Ag(110).
Main Results:
- C60 fullerene adsorbs on top of perylene rows along the [1-10] substrate axis.
- Fullerenes aggregate into alignments along the perylene rows, with alignment length increasing with coverage.
- C60 molecules preferentially adsorb on 'Short bridge' sites, between underlying perylene molecules.
- Modeling confirmed STM findings and indicated perylene's role in directing fullerene assembly.
Conclusions:
- The perylene multilayer substrate effectively directs the self-assembly of C60 fullerene.
- Weakly interacting composite layers exhibit predictable molecular ordering driven by substrate templating.
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