Abstract
The formation of densely packed overlayer of iron phthalocyanine (FePc) molecules on single-layer graphene (SLG) epitaxially grown on Ru(0001) is studied by means of low temperature scanning tunneling microscopy. We show that the FePc molecules form single molecular arrays, ordered honeycomb lattice, Kagome lattice and square lattice with increasing molecular coverage. The densely packed square lattice of the molecular layer is modulated by the moiré pattern of SLG/Ru(0001). The superposition of the square lattice of the molecular layer on the hexagonal lattice of SLG moiré pattern leads to the formation of a larger strip moiré pattern. This coverage-dependent self-assembling behavior of FePc on SLG/Ru(0001) is mainly driven by the inhomogeneous electronic structure of graphene moiré pattern, due to spatial-dependent interfacial charge transfer between SLG and Ru(0001) substrate.
Original language | English |
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Pages (from-to) | 183-186 |
Number of pages | 4 |
Journal | Chinese Chemical Letters |
Volume | 29 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jan 2018 |
Keywords
- Coverage-dependent
- Graphene
- Metal phthalocyanine
- Scanning tunneling microscopy
- Self-assembly